Cleantech Business Grants USA 2026

Cleantech money comes in four instruments, and only one of them is a grant

For a US clean-technology business in 2026, the largest single source of federal money is a tax credit, not a grant. A grant is an application you win: someone reviews your proposal against other people's proposals and decides. A tax credit is a claim you make: if your project meets the statutory test, you put it on a return and the amount is yours whether or not anyone else applied. A loan, a rebate, a voucher and a free assessment are different things again. Confusing these is the single most expensive mistake on this topic, because it sends founders hunting for a $75,000 competitive grant while a §48E credit worth $300,000 on the same solar array sits uncollected on their tax return.

What actually counts as a cleantech grant, and how much of it there is

A grant is money you do not repay, awarded on the strength of an application. In the GrantCompass catalog of 736 US funding programs, 250 list clean technology or renewable energy among their eligible industries, 149 of those were open to applications on August 28, 2026, and 62 of the 149 are grants. The rest are tax credits (47), loans (18), advisory or certification programs (17), prize competitions (4) and one forgivable loan. So even inside a slice defined by clean technology, grants are 42% of what is open — and the grants skew small and state-run: 107 of the 149 open programs are state-level, 35 federal and 7 private. The median published ceiling across the whole 250-program slice is $300,000, against $150,000 for the catalog as a whole.

What counts as a tax credit, and why it is usually the bigger number

A tax credit reduces tax owed dollar for dollar. The Inflation Reduction Act credits that dominate clean-energy finance — §48E, §45Y, §45X, §45Q, §45Z and §45V — are claimed on a federal return, not applied for. There is no reviewer, no deadline in the grant sense, and no cap on how many businesses can claim in a given year. A 2 MW commercial solar array costing $3,000,000 generates a §48E credit of $900,000 at the 30% prevailing-wage rate. No grant program in this catalog's clean-energy slice publishes a ceiling anywhere near that for an installation: the largest published open grant ceilings here are federal research awards — the DOE EERE announcements top out above $20,000,000 and the NIST CHIPS R&D announcement sets a $10,000,000 floor with no stated ceiling — and neither is money a solar owner can plan a project around.

Tax credits are not grants, and this page never counts them as one

GrantCompass labels every program as the instrument it actually is, including when the funder's own marketing calls a credit a "grant" or an incentive package a "cleantech grant." §48E, §45Y, §45X and §45Q appear on this page because they are the money a clean-energy business is most likely to receive, and they are labeled tax credits throughout. They are excluded from every grant count. The practical difference matters at three points: a credit needs tax capacity (or direct pay, or a buyer), a grant needs a competitive win; a credit is claimed after the spend, a grant is often reimbursed against an approved budget; and a federal grant reduces the basis on which a credit is computed, so stacking them is arithmetic, not addition.

Worked comparison: a $1,000,000 rooftop solar project, four ways

Take one project — a $1,000,000 commercial rooftop solar installation on a manufacturing building — and run it through each instrument. Tax credit only: §48E at the 30% prevailing-wage rate yields a $300,000 credit against federal tax. Grant plus credit: a $200,000 federal energy grant reduces the credit basis to $800,000, so the §48E credit falls to $240,000 — total federal support $440,000, more than either alone but not $500,000. Loan: a C-PACE assessment can finance up to 100% of the same project cost, which changes cash flow but not the credit. Free service: a DOE Onsite Energy assessment costs nothing and produces the engineering case, but delivers no capital. Sequence matters: model the basis reduction before you accept the grant.

The IRA-era cleantech funding landscape

US clean-technology funding runs on three layers stacked on top of each other: permanent federal tax credits written into the Internal Revenue Code, competitive federal grants run by the Department of Energy, USDA and EPA, and roughly a hundred state programs ranging from green-bank financing to job-creation credits. The tax layer carries the most money and the least discretion. The federal grant layer carries the most technical prestige and the most administrative overhead. The state layer carries the most programs — 107 of the 149 open programs in this slice — and the smallest cheques. Which layer matters to you depends less on how green your company is than on what you physically own, build or produce.

What the Inflation Reduction Act changed in 2022

The Inflation Reduction Act of 2022 (P.L. 117-169, signed August 16, 2022) changed the geometry of clean-energy incentives in three specific ways. First, it made most energy credits long-dated rather than subject to annual expiry votes. Second, it created elective pay under §6417 — direct pay — which lets nonprofits, municipalities, tribal governments and rural electric cooperatives receive credits as cash refunds despite having no tax liability. Third, it created credit transferability under §6418, letting a for-profit that cannot use a credit sell it outright to a third-party buyer for cash. Before 2022, a nonprofit hospital putting solar on its roof received nothing from the federal energy credits; after 2022, it receives a cheque.

What the One Big Beautiful Bill Act changed in 2025

The One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025) reversed part of that expansion. It terminated §30C for alternative-fuel refuelling property placed in service after June 30, 2026, and terminated §179D for property whose construction begins after that same date. It set a hard end for §45X credits on wind components sold after December 31, 2027, added phase-outs for critical minerals, and imposed an accelerated termination on wind and solar under §48E and §45Y. It also preserved the two mechanisms that made the credits usable: elective pay and transferability both survived. Executive Order 14315 of July 7, 2025, titled "Ending Market Distorting Subsidies for Unreliable, Foreign-Controlled Energy Sources" (90 F.R. 30821), then directed Treasury to enforce those terminations strictly.

Where the money stands on August 28, 2026

Two of the OBBBA deadlines have now passed, which changes the advice rather than merely dating it. The §30C charging credit is gone for anything energized on or after July 1, 2026. The §179D deduction is gone for any building whose construction starts on or after that date, though projects that began earlier still claim it. The July 4, 2026 begin-construction deadline for wind and solar under §48E and §45Y has also passed: a wind or solar facility that had not begun construction by that date must now be placed in service by December 31, 2027 to earn either credit. Everything else in the table above is live. Storage, geothermal, nuclear and hydrogen were not caught by the wind and solar cliff.

The five credits that carry the money, side by side

Five federal provisions account for almost all of the dollar value on this page, and they divide cleanly by what the claimant does. §48E pays the owner of an installed generating or storage asset a percentage of what it cost. §45Y pays the owner of a generating asset per kilowatt-hour produced over ten years. §45X pays a manufacturer per unit of component produced and sold. §45Q pays a capture operator per tonne of carbon oxide sequestered or used. §45Z pays a fuel producer per gallon, scaled to lifecycle emissions. Only one of the five — §45X — is available to a for-profit as direct cash from the IRS in its early years; the others reach a for-profit either as a tax offset or through sale of the credit.

PWA = Prevailing Wage and Apprenticeship requirements. "Direct pay" means elective pay under §6417 — cash refund rather than credit offset.

Which clean-technology sub-sector are you in? The funding changes with the answer

"Cleantech" is not a funding category. It is six different businesses that federal and state programs treat very differently, because the instruments key off what you physically do — own an asset, retrofit a building, manufacture a component, produce a fuel, capture a gas, or write software. A battery manufacturer and a carbon-accounting SaaS company both call themselves climate companies; one has access to a per-unit federal production credit worth tens of millions a year, the other has access to none of the energy credits at all and should be looking at §41 and SBIR instead. Find your row in the table below, then read the matching section.

Generation and storage: solar, wind, geothermal and batteries

If your company owns the asset that makes or stores electricity, the §48E Clean Electricity Investment Credit or the §45Y Clean Electricity Production Credit is your primary instrument, and you choose between them for any given facility — never both on the same one. §48E pays 6% of project cost at the base rate, or 30% where prevailing wage and apprenticeship rules are met or the facility is under 1 MW, plus stackable adders. §45Y pays roughly $0.0275 per kWh with prevailing wage over the first ten years of operation. Wind and solar carry the July 4, 2026 begin-construction deadline described below. Standalone energy storage does not — the OBBBA's applicable-facility definitions expressly except energy storage technology under §48E(e)(4)(C), so a battery project keeps the longer technology-neutral runway.

Efficiency retrofit: buildings, HVAC and industrial process heat

Energy-efficiency work is the sub-sector the 2025 law hit hardest, because §179D — the deduction that paid up to $5.94 per square foot in 2026 and could be allocated to the architect or engineer on a government or nonprofit building — is terminated for property whose construction begins after June 30, 2026. Retrofit firms still have three live routes. Combined heat and power, geothermal heat pumps and fuel cells are §48E property, not §179D property, so they keep the investment credit. State green banks and C-PACE authorities finance the capital. And the DOE Onsite Energy Technical Assistance Partnerships give manufacturers a free engineering assessment; the ITAC implementation grant that used to follow those assessments is currently on hold.

Clean manufacturing: cells, modules, components and minerals

If you produce eligible components inside the United States, §45X pays per unit sold to an unrelated buyer, with no prevailing wage condition and no competitive process. A plant making 500 MW of solar modules a year earns $35,000,000 in credits at $0.07 per watt. A 1 GWh battery cell line earns $35,000,000 at $35 per kWh. For-profit manufacturers may elect direct pay for the first five tax years, which is the only route by which a pre-profit US manufacturer receives federal cash for production rather than a paper offset. Beneath §45X sit the state capital-investment incentives — New Jersey's Next New Jersey Manufacturing credit at up to 25% of capital investment, Indiana's Hoosier Business Investment credit, Arizona's Advanced Manufacturing Facilities grant.

Transport and fuels: EVs, charging, hydrogen and SAF

Transport lost its most-used credit and kept its biggest ones. §30C, which paid 30% of an EV charging port up to $100,000, is terminated for property placed in service after June 30, 2026 — that date has passed, and a charger energized today earns nothing federally. What remains: §45Z pays clean fuel producers up to $1.00 per gallon through December 31, 2029, with feedstock now required to originate in the United States, Mexico or Canada; §45V pays hydrogen producers up to $3.00 per kilogram but only for facilities that begin construction before January 1, 2028; the DOE Loan Programs Office ATVM facility lends $100,000,000 and up for vehicle and battery manufacturing retooling; and state voucher schemes such as California HVIP and New York's NYTVIP discount zero-emission trucks at the point of sale.

Carbon management: capture, utilization and sequestration

Carbon capture is the one clean-energy sub-sector whose federal support the 2025 law improved. §45Q pays $85 per metric tonne of carbon oxide captured at an industrial or power facility, and the OBBBA equalized the rate across the three end uses — secure geologic storage, enhanced oil recovery, and commercial utilization — where storage had previously been paid more. Direct air capture earns $180 per tonne. The credit runs for twelve years from the date the capture equipment is placed in service, is transferable for cash, and carries a recapture exposure that extends beyond the credit period. Because §45Q is per-tonne and volume-driven, it behaves like §45X rather than like §48E: model it off throughput, not off capital cost.

Climate software and data: no energy property, no energy credit

Grid-optimisation platforms, carbon accounting, demand response, energy management and building analytics companies are the sub-sector most often disappointed by this topic. The IRA energy credits attach to physical energy property or to manufactured components; a software product is neither, so §48E, §45Y and §45X do not apply no matter how much carbon the product avoids. The instruments that do apply are the federal §41 research credit — up to $500,000 a year of which a qualified small business can take against employer payroll tax before it has any income tax liability — plus SBIR and STTR awards from DOE, NSF and the Department of Defense, and the state innovation-voucher and proof-of-concept grants listed further down this page.

Federal IRA tax credits

The federal clean-energy tax credits are the largest and least competitive money on this page, and none of them is a grant. Each is claimed on a federal return under a numbered Internal Revenue Code section: §48E for investment in generating and storage property, §45Y for the electricity that property produces, §45X for manufactured components, §45Q for captured carbon oxide, §45Z for clean fuel, §45V for clean hydrogen, and §41 for research spending of any kind. Two of the set — §30C and §179D — were terminated by the One Big Beautiful Bill Act on dates that have now passed. The sections below give the current rate, the current deadline, and the compliance condition that decides whether you get the headline number or a fifth of it.

§48E — the Clean Electricity Investment Credit, and when §48 still governs

The §48E Clean Electricity Investment Credit is a percentage credit on the cost of qualifying clean energy property placed in service in the United States. It is "technology-neutral": rather than listing eligible technologies, §48E applies to any facility generating electricity with a greenhouse gas emissions rate not greater than zero, plus qualifying energy storage. Its predecessor, §48, enumerated technologies and still governs any project whose construction began before January 1, 2025. Which section applies is decided entirely by the construction start date, and that date is also what determines whether the wind and solar termination described below reaches you. Treasury and the IRS published final regulations under §45Y and §48E on January 15, 2025 (90 FR 4006).

What property qualifies under §48 and §48E

Eligible technologies under the older §48 include solar photovoltaic, solar heating and cooling, geothermal energy equipment, fuel cells of at least 0.5 kW capacity and 30% efficiency, small wind turbines at or below 100 kW nameplate capacity, microturbines under 2,000 kW, combined heat-and-power systems, standalone energy storage at or above 5 kWh capacity, biogas systems producing at least 52% methane, and waste energy recovery property under 50 MW. Under §48E the list is replaced by the zero-emissions test, so a technology not named in §48 can still qualify if it generates electricity at or below a zero emissions rate — and energy storage technology is separately included. For a mixed project, each unit of property is tested on its own, not the site as a whole.

The 6% base rate and the 30% prevailing-wage rate

The §48E credit has two rate tiers, and the gap between them is fivefold. The base rate is 6% of eligible basis, available to any qualifying installation regardless of scale or workforce practice. The enhanced rate is 30%, available automatically to facilities with a maximum net output below 1 MW, and to any larger project that satisfies prevailing wage and apprenticeship requirements throughout construction and for five years after the property is placed in service. For a $3,000,000 array, that is the difference between a $180,000 credit and a $900,000 credit. For any commercial project above 1 MW, prevailing wage compliance is not an optimization — it is the whole economics of the credit, and it must be designed into the EPC contract before work starts.

The three bonus adders, and the domestic-content threshold that rises every year

Three stackable adders can lift the §48E rate above 30%. The energy community bonus adds 10 percentage points for facilities in a brownfield site, a statistical area with historical fossil-fuel employment and elevated unemployment, or a census tract with a retired coal mine or coal-fired generating unit. The domestic content bonus adds 10 points, and its threshold now steps up annually: 40% of the cost of steel, iron and manufactured products for construction beginning before June 16, 2025; 45% from then to the end of 2025; 50% for construction beginning during calendar 2026; 55% after December 31, 2026. Offshore wind uses lower figures — 20%, 27.5% and 35% respectively. The low-income community bonus adds 10 or 20 points for qualifying small facilities under an annual capacity allocation.

Stacking all three adders: the arithmetic of a 60% rate

The adders are additive percentage points on top of the 30% prevailing-wage rate, not multipliers, and nothing in the statute prevents a single facility from earning all three. Whether that is achievable is a siting and procurement question you can answer before you commit capital: the energy community and low-income maps are published, and the domestic content figure is a cost build-up you can run against a bill of materials.

The wind and solar deadline has passed: what July 4, 2026 means now

The practical consequence on August 28, 2026 is a fork, not a countdown. If your wind or solar facility began construction on or before July 4, 2026 and you can document it, the credit termination date does not apply to you and the facility runs on the ordinary technology-neutral schedule. If it did not, the facility must be placed in service by December 31, 2027 to earn §48E or §45Y at all — roughly sixteen months from today to complete construction, interconnect and energize. Two categories escape this entirely: energy storage technology is expressly excepted under §48E(e)(4)(C), and non-wind, non-solar generation such as geothermal, nuclear and hydropower keeps the longer runway, with phase-out beginning for facilities that start construction in 2034 or later.

Beginning of construction: Notice 2025-42, and the court that vacated it

How you prove a July 4, 2026 construction start became the most contested question in US energy tax in 2026, and the answer changed twice. IRS Notice 2025-42, issued August 15, 2025 under Executive Order 14315, made the Physical Work Test the sole method for applicable wind and solar facilities. Section 3.01 of the notice states that "except as provided in section 6 of this notice, the Physical Work Test described in section 3.02 of this notice is the sole method that a taxpayer may use for these purposes." Section 6 preserved the Five Percent Safe Harbor only for a "low output solar facility," defined in section 6.02 as one with "maximum net output of not greater than 1.5 megawatt (MW) (as measured in alternating current)." On June 6, 2026 the US District Court for the District of Columbia vacated the notice in full.

What the vacatur of Notice 2025-42 does and does not settle

In Oregon Environmental Council v. Internal Revenue Service, No. 25-4400 (CKK), the District Court for the District of Columbia held Notice 2025-42 arbitrary and capricious and remanded it to the IRS, on the reasoning that the agency had not adequately justified departing from a decade of beginning-of-construction guidance on which the industry had relied. Law firms covering the decision in June 2026 — among them McGuireWoods, Holland & Knight and Gibson Dunn — read it as restoring the 5% safe harbor alongside the Physical Work Test for wind and solar. What is not settled: the government was widely expected to seek a stay and appeal, and an appellate outcome was not expected before the July 4, 2026 deadline itself. GrantCompass has not verified any appellate ruling as of August 28, 2026. If your position depends on the 5% safe harbor, treat it as live but contested and document the physical work test as well.

Prevailing wage is a five-year obligation, not a ribbon-cutting checklist

The prevailing wage requirement under §48E applies to every laborer and mechanic employed in the construction, alteration or repair of the qualified facility — by the taxpayer, by any contractor, and by any subcontractor — during construction and for five years after the property is placed in service. The five-year clock starts at placed-in-service, not at groundbreaking. Within that window it covers panel replacements, inverter swaps, tracker repairs and structural work after storm damage when performed by contractors. Routine operations and maintenance by your own employees is generally outside scope; contracted maintenance generally is not. Failing the requirement drops the credit from 30% to the 6% base rate, and the reduction is retroactive to the year claimed.

Davis-Bacon rates and certified payroll records

The applicable wage is the prevailing wage determination published by the US Department of Labor for the project's classification and county, comprising a base hourly rate plus a fringe benefit component; you must pay at least the combined figure. For a utility-scale solar build the classification is usually a heavy construction or state-specific schedule, and the DOL Wage and Hour Division publishes a lookup by state and county. You must maintain weekly certified payroll records for every contractor and subcontractor on the project during the compliance period, showing worker name, classification, hours, hourly rate paid and fringe contributions. The IRS does not require these to be pre-filed, but it expects them on examination, and records that were never created cannot be reconstructed afterwards. Build the collection process into the EPC contract before mobilization.

Apprenticeship percentages and the good-faith exception

The apprenticeship requirement has three components: a labor hours percentage, a ratio requirement, and a participation requirement for any contractor employing four or more workers on the project. The labor hours percentage — the share of total construction hours performed by qualified apprentices from a registered apprenticeship program — is 10% for projects beginning construction in 2023, 12.5% in 2024, and 15% for 2025 and later. A good-faith effort exception applies where you requested apprentices from a registered program and the request was denied or went unanswered for five business days; the exception depends entirely on being able to produce the written request and the response, so make the request in writing and keep it with the credit file. Apprentices must be paid the applicable apprentice wage rate, not the journeyworker rate.

Cure provisions, contractor flow-down, and the repair window

A prevailing wage shortfall found on examination is curable rather than fatal. The taxpayer makes correction payments to the affected workers with interest and pays a penalty to the IRS, and the 30% rate survives; the cure is unavailable where the failure was intentional disregard, in which case the correction and penalty amounts increase. Because the obligation reaches every tier of subcontractor, the compliance risk sits with people you do not employ: write flow-down prevailing wage and recordkeeping obligations into the EPC contract and require them in every subcontract, and verify compliance before releasing payment at each tier. The same discipline has to survive into operations, because any contracted repair inside the five-year window is covered work — including the inverter replacement that arrives sooner than the warranty implied.

Proving beginning of construction on a pre-2025 §48 project

For projects still sitting under the older §48 — construction begun before January 1, 2025 — two long-standing safe harbors establish the start date, and either is sufficient. Physical work of a significant nature looks at the nature of the work, not its cost: excavation for foundations, setting anchor bolts, pouring pads, installing racking, or off-site manufacture of project-specific components under a binding written contract. Preliminary activity does not count — planning, design, financing, permitting, surveys, environmental and engineering studies, site clearing, and excavation to change land contour are all expressly excluded. The 5% safe harbor is satisfied by incurring at least 5% of total project cost before the deadline: $500,000 on a $10,000,000 project, where "incurred" follows accrual accounting, so delivered equipment and rendered services count and option agreements do not.

The continuity requirement and the four-year safe harbor

Establishing a start date is only half the test: you must then maintain a continuous program of construction. The continuity safe harbor deems that satisfied if the facility is placed in service by the end of the fourth calendar year after the year construction began — a project that began construction on August 20, 2025 and is placed in service by December 31, 2029 is inside it. Miss that and continuity is judged on facts and circumstances, with a published list of excusable disruptions that includes severe weather, natural disasters, permitting and interconnection delays, custom-component manufacturing delays, labor stoppages, financing delays and supply shortages. Keep dated photographs, contractor invoices, delivery records and correspondence evidencing each delay; retain the whole file for at least six years after the return is filed.

§45X — the Advanced Manufacturing Production Tax Credit

§45X is structurally different from every other credit on this page: it rewards manufacturing rather than installation, ownership or generation. If your company makes solar cells or modules, battery cells or modules, inverters, wind components, or applicable critical minerals inside the United States, the credit is computed per unit of eligible production sold to an unrelated buyer — not as a percentage of what the factory cost. The per-unit rates were set to make domestic production cost-competitive with imports, which is why the arithmetic is so large at volume. A 500 MW-per-year module line earns $35,000,000 annually at $0.07 per watt. A 1 GWh-per-year battery cell line earns the same $35,000,000 at $35 per kWh.

§45X per-unit rates by component

The credit rate is fixed per component type in the statute and does not vary by state, project size or applicant. Rates are stated per watt of capacity for solar and wind components, per kilowatt-hour of capacity for battery components, and as a percentage of production cost for critical minerals. Unlike §48E there is no small-project exception and no prevailing wage tier: the rate is the rate, and material credit value requires material production volume. The table below carries the current per-unit rates alongside each component's phase-out schedule.

The §45X phase-outs: a wind cliff, a minerals schedule, and a new mineral

Three different §45X timetables now run in parallel, and conflating them will misprice a factory. Wind components face a cliff, not a phase-down: nacelles, blades and towers earn nothing for components produced and sold after December 31, 2027, with no tapering years in between. Solar, battery and inverter components taper to 75% of the rate in 2030, 50% in 2031, 25% in 2032, and zero thereafter. Applicable critical minerals, which the 2022 statute left permanent, were given their own taper by the OBBBA — full rate through 2030, then 75%, 50% and 25% across 2031 to 2033. Metallurgical coal was newly added at 2.5% of production costs and ends after 2029. A wind-component business plan cannot carry §45X revenue past 2027 without assuming a legislative extension.

§45X foreign entity rules and the 65% integrated-component test

Two eligibility conditions sit outside the rate table and are where §45X claims most often break. The first is the prohibited foreign entity regime the OBBBA layered onto the credits, defined by reference to §7701(a)(51) and (52) of the Code; ownership, control and licensing relationships with entities connected to specified foreign countries can disqualify a claim, and Treasury has continued to issue implementing guidance, so an ownership chain that passed in 2024 needs re-testing for each tax year. The second is the integrated-component rule: for eligible components sold after December 31, 2026, a producer is not treated as having sold a component integrated into a second eligible component unless at least 65% of the direct material cost of the secondary component is attributable to primary components mined, produced or manufactured in the United States.

Setting up §45X tracking before your first production run

§45X credits are earned in the tax year the eligible components are sold, where "sold" means title and risk of loss have passed — not when the invoice issues or cash arrives. That single definition drives the whole operational build. Your ERP or MES has to record production in the credit's own unit: watts per module rather than modules shipped, designed kWh capacity per cell rather than cell count, and production cost by mineral for the 10% calculation. Every batch has to be matched to a sales order and each customer screened against the related-party definition. If you intend to elect direct pay or transfer the credit you must complete IRS pre-filing registration for that tax year before filing, and the registration number goes on Form 7207 and, for a transfer, on the buyer's return.

§45Y and §45 — the production credit for electricity generated

Where §48E pays a percentage of what a facility cost, §45Y pays for what it produces. The base rate is roughly $0.0055 per kWh before the multiplier, and prevailing wage and apprenticeship compliance applies a fivefold multiplier that brings the effective figure to approximately $0.0275 per kWh, inflation-adjusted annually. The credit period runs ten years from placed-in-service. Its predecessor §45 covered wind, closed-loop and open-loop biomass, geothermal, landfill gas, municipal solid waste, hydropower and marine hydrokinetic energy; solar moved to the investment credit in 2007 and solar-plus-storage is structured around §48E today. §45Y replaced the technology list with the same zero-emissions test §48E uses, and carries the identical wind and solar termination.

Choosing between the investment credit and the production credit

For a facility eligible for either, the choice turns on three variables: capacity factor, tax position and hold period. Wind at a 35% to 45% capacity factor produces enough kilowatt-hours that ten years of §45Y at $0.0275 typically exceeds 30% of capital cost, which is why wind has historically taken the production credit. Solar at an 18% to 25% capacity factor usually does not, which is why solar takes the investment credit. A company with strong current tax liability values the upfront §48E credit more; a company whose taxable income arrives later values a ten-year stream. And §48E carries a five-year recapture exposure tied to the property, where §45Y is earned annually as electricity is produced and sold.

§45Q — the carbon oxide sequestration credit

§45Q pays a per-tonne credit for carbon oxide captured and either stored in secure geologic formations, used as a tertiary injectant in enhanced oil recovery, or converted through a qualifying commercial utilization. The rate for capture at an industrial or power facility is $85 per metric tonne; direct air capture earns $180 per metric tonne. The One Big Beautiful Bill Act's most consequential change here was parity: enhanced oil recovery and commercial utilization now earn the same rate as geologic storage, where storage had previously been paid more. The credit period runs twelve years from the date the capture equipment is placed in service, the credit is transferable for cash, and recapture exposure extends past the credit period, which is why offtake and monitoring agreements carry so much weight in §45Q financing.

§45Z — the clean fuel production credit

§45Z pays producers of transportation fuel with low lifecycle greenhouse gas emissions, at up to $1.00 per gallon for non-aviation fuel and a higher ceiling for sustainable aviation fuel, scaled by the fuel's emissions rate under the applicable lifecycle model. The fuel must be produced in the United States and sold or used in a qualifying transaction, and the OBBBA extended the credit through December 31, 2029 while adding a feedstock origin restriction: after December 31, 2025, feedstock must originate in the United States, Mexico or Canada. §45Z is the primary federal instrument for renewable diesel, biodiesel, renewable natural gas and SAF producers, and because it is volumetric and emissions-scaled, a producer's credit revenue moves with feedstock carbon intensity, not just gallons.

§45V — the clean hydrogen production credit

§45V pays up to $3.00 per kilogram of qualified clean hydrogen produced at a US facility, on a four-tier scale keyed to lifecycle emissions intensity, for ten years from the facility's placed-in-service date. The credit survived the 2025 law but its window narrowed sharply: under the OBBBA, a facility must begin construction before January 1, 2028 to be eligible, five years earlier than the 2032 deadline the Inflation Reduction Act set. For an electrolysis project with a multi-year permitting and interconnection path, that is a near-term development constraint rather than a distant one. GrantCompass does not currently carry a dedicated §45V program record in the US catalog; the clean-fuel and clean-electricity records above are the closest adjacent entries.

§30C — terminated for property placed in service after June 30, 2026

§30C paid 30% of the cost of EV charging and alternative-fuel refueling equipment with prevailing wage compliance, or 6% without, capped at $100,000 per item for business property and restricted to low-income or non-urban census tracts. Its most valuable feature was that "item" meant each charging port rather than each site, so a twenty-port installation carried a $2,000,000 eligible basis. That is now history for new deployments, and it is worth stating plainly because a great deal of published guidance still describes §30C in the present tense. Property placed in service on or before June 30, 2026 remains eligible and should still be claimed; the credit is reported on Form 8911 for the year the property was placed in service.

§179D — terminated for construction beginning after June 30, 2026

§179D is a deduction, not a credit: it reduces taxable income rather than tax owed, so a $1,000,000 deduction is worth $210,000 to a taxpayer at a 21% federal rate. It applies to commercial buildings and to residential buildings of four or more stories achieving at least 25% energy savings against the applicable ASHRAE 90.1 reference standard. For 2026, Revenue Procedure 2025-32 set the inflation-adjusted rates at $0.59 to $1.19 per square foot without prevailing wage compliance and $2.97 to $5.94 per square foot with it. The IRA's designer allocation — under which a tax-exempt building owner assigns the deduction to the architect, engineer or contractor responsible for the energy-efficient design — still applies to qualifying projects already under way.

§41 — the research credit that stacks underneath all of it

Any cleantech company doing qualified research in the United States should be claiming the federal §41 research credit, whether or not it touches an energy credit. Under the Alternative Simplified Credit method the credit is 14% of qualified research expenses above a computed base. For a qualified small business — broadly, under $5,000,000 of gross receipts in the credit year and no gross receipts before the five preceding tax years — up to $500,000 a year of the credit can be applied against employer payroll taxes, which converts it into cash before the company has any income tax liability. One interaction matters for cleantech specifically: expenses funded by a federal grant such as an SBIR or ARPA-E award are excluded from the qualified research expense base, so grant-funded work reduces the §41 claim.

Direct pay versus transferability — the IRA's most important structural change

Before 2022, a federal energy tax credit was worthless to anyone without federal tax liability, which meant nonprofits, municipalities, tribal governments and rural electric cooperatives received nothing from the investment and production credits no matter how much clean energy they built. The Inflation Reduction Act fixed that from both ends. Elective pay under §6417 turned the credits into refundable cash payments for a defined list of applicable entities. Transferability under §6418 created a market in which a for-profit that cannot use a credit sells it outright. Between them, these two mechanisms are the reason a municipal utility, a rural cooperative and a pre-profit manufacturer can all finance projects off the same statute. Both survived the 2025 law unchanged.

Who can use elective pay, and for how long

Applicable entities eligible for elective pay are tax-exempt organizations including 501(c)(3)s, state and local governments and their instrumentalities, US territories, Indian tribal governments and tribal enterprises, Alaska Native corporations, the Tennessee Valley Authority, and rural electric cooperatives. For these entities, elective pay is available every year, without limit, across the clean-energy credits including §48E, §45Y and §45Q. The mechanics are procedural rather than competitive: complete IRS pre-filing registration for the specific energy property and tax year, receive a registration number, then make the elective payment election on a timely filed annual return. Missing the pre-filing registration is the most common procedural failure among first-time claimants, and it cannot be cured after the return is filed.

The §45X carve-out: direct pay for for-profit manufacturers

For-profit corporations are not applicable entities and cannot generally use elective pay — with one exception that matters enormously to clean manufacturing. A for-profit claiming §45X may elect direct pay for the first five tax years in which it claims the credit. That means a startup battery or module manufacturer with no taxable income can receive real cash from the IRS based on units produced and sold, in the years when it needs capital most. From year six the manufacturer switches to transferability or conventional use against liability. The same five-year elective pay election is available for the §45Q carbon credit and the §45V hydrogen credit; it is not available for §48E or §45Y.

How transferability works in practice

Transferability under §6418 lets a for-profit taxpayer sell all or part of an eligible credit to an unrelated buyer for cash. The transfer is irrevocable, the payment received is not taxable income to the seller and is not deductible by the buyer, and the credit must be registered through the IRS pre-filing portal before either party files. Buyers are typically banks, insurers and large corporates with stable tax liability, and market pricing is commonly quoted at 90 to 95 cents on the dollar — a figure GrantCompass reports as market convention rather than a published statistic, because no federal agency publishes transfer prices. Recapture risk on the underlying property follows the credit to the buyer, which is why transfer agreements carry indemnities and why buyers diligence the basis documentation.

Which path applies to your organization

Three cases cover almost every reader. A nonprofit, municipality, tribal government or rural cooperative uses elective pay; transferability is not available and no choice exists. A for-profit with current tax liability larger than the credit simply uses the credit conventionally — a $500,000 credit reduces a tax bill by $500,000, and involving a buyer would only cost the discount. A for-profit whose credit exceeds its liability — the normal position for a fast-growing company, one carrying large net operating losses, or one in its first commercial years — sells the credit under §6418. A $1,000,000 §48E credit transferred at 92 cents produces $920,000 in cash, usually at closing and before the return is filed.

The excessive-payment penalty, and why estimates are dangerous

Elective pay carries a penalty that has no equivalent in the grant world. If an applicable entity makes an excessive payment election — claims more than the amount it was entitled to — the IRS assesses a penalty of 20% of the excessive amount on top of requiring repayment, unless the entity demonstrates reasonable cause. For a municipality or hospital estimating a credit from a contractor's summary rather than a documented basis computation, that is a live risk: the basis has to exclude non-qualifying property, be reduced by any federal grant received, and be supported on examination. Have the eligible basis and credit amount certified before filing rather than after, and keep the engineering documentation with the return.

Federal cleantech grants and DOE programs

Federal competitive funding for clean technology comes from four agencies with distinct temperaments: the Department of Energy funds research, demonstration and manufacturing; USDA funds rural energy and biobased production; EPA funds contaminated-site remediation that often precedes a renewable project; and the Department of Defense funds energy technology through SBIR when it serves a defense mission. Thirty-five of the 149 open programs in this slice are federal. The awards are large by the standards of the rest of this catalog — the DOE EERE announcements alone run from $500,000 to more than $20,000,000 — but the administrative load is proportionate. Several of the best-known programs are between solicitations right now rather than open, and the section below says which.

DOE SBIR and STTR — the entry point for a cleantech R&D company

The Department of Energy's SBIR and STTR programs fund small businesses across the whole DOE mission: energy efficiency, renewables, nuclear, fossil energy, environmental management, high energy physics and lab infrastructure. DOE SBIR Phase I awards up to $200,000 for six to twelve months of feasibility research against a specific announced topic, with no cost share. Phase II awards up to $1,600,000 over twenty-four months for prototype development and is not an open competition — DOE invites Phase I awardees to apply. DOE STTR Phase I runs $200,000 to $250,000 and requires a partnership with a research institution. DOE issues two SBIR releases a year; both DOE SBIR phases were between intakes as of August 28, 2026.

ARPA-E — for concepts no existing program would fund

ARPA-E funds high-risk, high-reward energy technology through cooperative agreements, and its selection standard is different in kind from SBIR's. SBIR asks whether your approach is feasible against a published topic; ARPA-E asks whether the concept is transformational enough that private capital alone would not attempt it. The IGNIITE program — Inspiring Generations of New Innovators to Impact Technologies in Energy — is aimed specifically at early-career innovators and does not restrict applications to announced topics. No cost share is required, and full proposals are by invitation after a concept paper stage. The 2026 IGNIITE concept paper deadline was May 29, 2026, and the program is recorded as closed in the GrantCompass catalog as of August 28, 2026; monitor arpa-e.energy.gov for the next cycle.

DOE Office of Science and the nuclear R&D vehicles

Three DOE programs sit outside the SBIR track and take applications from companies as well as universities. The DOE Office of Science FY2026 financial assistance solicitation is an open-window call across seven program areas — advanced scientific computing, basic energy sciences, biological and environmental research, fusion energy sciences, high energy physics, nuclear physics and isotope R&D — awarding $50,000 to $5,000,000 per year, with a September 30, 2026 close. Consolidated Innovative Nuclear Research funds nuclear energy R&D across eight technical focus areas at up to $3,100,000 with no cost share; its FY2026 round has closed. The Advanced Nuclear Licensing Cost-Share program reimburses part of the cost of licensing advanced reactor designs with the Nuclear Regulatory Commission, and closes September 30, 2026.

DOE EERE, GRIP and the Loan Programs Office

The largest federal clean-energy dollars are not competitive R&D grants at all. DOE EERE funding opportunity announcements run continuously across efficiency, renewables and sustainable transportation, from $500,000 to more than $20,000,000 per award, with several open at any time. The Grid Resilience and Innovation Partnerships program funds transmission and grid projects from $5,000,000 to $500,000,000 and is between rounds. The Loan Programs Office ATVM facility lends to vehicle and component manufacturers retooling for advanced technology, typically at $100,000,000 and above, on a rolling pre-application basis — a scale that suits an established manufacturer rather than a startup. The Vehicle Technologies Office program-wide announcement runs annually and is between cycles.

USDA REAP — the rural energy program whose grants are paused

When active, REAP covers up to 25% of the cost of a renewable energy installation or energy efficiency improvement for agricultural producers and rural small businesses under base Farm Bill funding, rising to 50% for IRA-enhanced awards, with grants reaching $1,000,000 for renewable energy systems and $500,000 for efficiency improvements. Loan guarantees reach $25,000,000 and are unaffected by the pause. The National Sustainable Agriculture Coalition, announcing the halt on April 1, 2026, quoted policy specialist Richa Patel: "At a moment when farmers and rural small businesses face converging financial pressures, bringing the Rural Energy for America Program to a standstill only increases that pressure." Contact your USDA state Rural Development office for current status.

EPA Brownfields — the grant that precedes a solar site

EPA Brownfields Cleanup Grants fund remediation of contaminated property, which makes them structurally relevant to cleantech developers acquiring former industrial land for solar arrays, battery storage or charging depots — and doubly so because a brownfield site is one of the qualifying categories for the §48E energy community adder. Standard cleanup awards reach $500,000, or $650,000 with a waiver, and a 20% cost share applies unless waived for small or disadvantaged communities. Applicants must have completed a Phase II environmental site assessment for the property before applying: it is an eligibility prerequisite, not a scoring factor. The FY2026 cycle used a June 15, 2026 site characterization letter deadline, and the program is between intakes as of August 28, 2026.

Free federal technical assistance for manufacturers

Two DOE services cost nothing and are chronically under-claimed by small manufacturers. The Onsite Energy Technical Assistance Partnerships provide a free engineering assessment of onsite generation, combined heat and power, waste heat recovery, industrial heat pumps, solar and battery storage at your facility, through regional partners you contact directly at any time. The ITAC Implementation Grant, which reimbursed up to $300,000 at 50% cost share against a recommendation from an assessment, is currently on hold: DOE has paused new submissions, application reviews and award negotiations while it evaluates program portfolios. The assessment remains available even while the implementation grant does not, and an assessment report is the document a state green bank or C-PACE lender will ask for.

Private cleantech programs, prizes and lab access

Seven of the 149 open programs in this slice are private rather than governmental, and the useful ones are not primarily cash. What a pre-commercial cleantech company most often lacks is not $100,000 — it is access to a test rig, an accredited laboratory, a pilot host willing to put an unproven system in a real building, and a credible third party willing to say the technology works. Two of the programs below supply exactly that and are the reason they are worth more than their headline number. The rest are pitch competitions, whose realistic value is investor exposure rather than prize money.

Wells Fargo Innovation Incubator (IN2)

The Wells Fargo Innovation Incubator is a non-dilutive program co-administered by Wells Fargo and the National Laboratory of the Rockies, providing selected companies with up to $250,000 plus hands-on access to national laboratory researchers, equipment and validation support. Its focus is the built environment and infrastructure: building energy efficiency, advanced HVAC, grid-interactive equipment, and EV infrastructure. Intake runs through regional Channel Partners — utilities, city innovation offices and cleantech accelerators with an established relationship to the program — rather than through an open application round, so the first practical step is identifying which Channel Partners operate in your region. Direct enquiries go to the program at IN2@nlr.gov, and cohort timing is announced rather than fixed.

DOE American-Made prize challenges and the lab voucher

The DOE American-Made Program runs prize competitions for clean energy innovators across solar, energy storage, grid modernization, bioenergy, geothermal and emerging technologies, with awards from $50,000 to more than $3,000,000 per challenge and multiple competitions open simultaneously year-round. Prizes carry no cost share and none of the reporting burden of a cooperative agreement. The component most participants underrate is the national laboratory voucher: winners receive credit for time on DOE lab equipment. For a hardware company, $100,000 of lab vouchers is frequently worth more than the same amount in cash, because the instrumentation and accredited test capability behind them cannot be bought at that price anywhere else.

Why Phase 1 of a prize challenge suits a pre-prototype company

Pitch competitions: read them as distribution, not as funding

Four open programs in this slice are competitions or accelerators with clean technology among their eligible sectors: gener8tor, which invests $100,000 for equity across cohorts in about a dozen states; Startup World Cup, whose regional heats lead to a $1,000,000 investment prize; the Entrepreneurship World Cup, awarding $20,000 to $200,000 equity-free at global finals; and SXSW Pitch. For all four, tens of thousands of entrants compete for a handful of awards, so the expected cash value to any individual applicant is close to zero. The value that does accrue reliably is investor exposure, mentorship, and a dated third-party signal you can cite in a grant application or a fundraise — which is a real asset, just not a funding line.

How stable is this money? What terminated, what paused, what is between rounds

Clean-energy funding has been the most volatile topic in this catalog over the last eighteen months, and a confidently wrong "open" costs a reader more here than anywhere else. Between July 2025 and August 2026 two federal credits were terminated on dates that have now passed, one large federal grant program stopped making awards, another suspended new submissions, a Treasury notice restricting eligibility was issued and then vacated by a federal court, and several of the best-known DOE competitions moved between solicitations. GrantCompass tracks a status for every program rather than assuming that a page still on an agency website means an open door. The sections below record what changed, when, and what a reader should do about each.

Terminated: §30C and §179D

Two provisions ended on June 30, 2026 and nothing revives them for new work. §30C, the alternative fuel vehicle refueling property credit, does not apply to property placed in service on or after July 1, 2026 — an EV charging port energized today earns no federal credit, regardless of census tract or prevailing wage. §179D, the energy efficient commercial buildings deduction, does not apply to property whose construction begins on or after that date. Both terminations came from the One Big Beautiful Bill Act, P.L. 119-21, signed July 4, 2025. Work that predates the cut-off is unaffected: a charger placed in service in May 2026 and a building whose construction began in June 2026 both still qualify, and both should still be claimed.

Paused: USDA REAP grant awards

The Rural Energy for America Program is the clearest case of a program that is neither open nor cancelled. On March 31, 2026 USDA's Rural Business-Cooperative Service announced it would make no further REAP grant awards pending updated regulations implementing Executive Order 14315, and stated that applicants who had already applied under the prior notice would have to reapply once a new funding notice issues. No timeline has been published. REAP guaranteed loans, up to $25,000,000, continue to be made. For a farm or rural business that had budgeted a REAP grant at 25% to 50% of project cost, the practical answer today is the guaranteed loan plus §48E, not a grant application; GrantCompass records REAP's status as paused rather than open.

On hold: the DOE ITAC implementation grants

The Industrial Training and Assessment Center implementation grants — up to $300,000 at 50% cost share against a recommendation from a free DOE energy assessment — are the most useful federal efficiency money a small manufacturer can get, and they are not currently taking applications. DOE has paused new submissions, application reviews, selections and award negotiations while it evaluates program portfolios, with subsequent application dates to be announced. The free assessments themselves continue through the Onsite Energy Technical Assistance Partnerships. This is a case where our own catalog status needs correcting: the program's status field reads active and its deadline text reads "rolling quarterly," which is enough to make it count as open in an automated sweep even though the notice attached says it is on hold.

Contested: the beginning-of-construction rule for wind and solar

The rule that decides whether a wind or solar project cleared the July 4, 2026 deadline changed twice in twelve months. IRS Notice 2025-42, issued August 15, 2025, restricted proof of construction start to the Physical Work Test for everything except solar facilities of 1.5 MW alternating current or less. On June 6, 2026 the US District Court for the District of Columbia vacated that notice in full in Oregon Environmental Council v. Internal Revenue Service, No. 25-4400 (CKK), holding it arbitrary and capricious. The immediate effect is that both the Physical Work Test and the 5% safe harbor are available again. Counsel writing in June 2026 expected the government to seek a stay and to appeal; GrantCompass has verified no appellate outcome as of August 28, 2026, so treat the safe harbor as live and contested.

Between solicitations: the DOE and EPA competitions

Five well-known federal programs are neither closed nor accepting applications today, and each has a different reason. DOE SBIR Phase I runs two releases a year and is between them. ARPA-E IGNIITE closed its 2026 concept paper window on May 29, 2026. DOE CINR closed its FY2026 round in June 2026. EPA Brownfields Cleanup is between annual cycles. DOE GRIP is between rounds, with Round 3 selections expected during 2026. California Competes, the largest state clean-adjacent grant in the catalog at up to $36,000,000 per award, has no confirmed open application period. All six are worth a watch; none is worth a proposal today.

Stable: what has not moved

Against that churn, four things have held steady through 2026 and are the reasonable base of a funding plan. The §41 research credit and its $500,000 payroll-tax offset are unchanged and available to any company doing qualified research. The elective pay and transferability mechanisms both survived the 2025 law intact, so tax-exempt entities and pre-profit for-profits keep their routes to cash. §45Q improved rather than shrank. And the state layer — 107 of the 149 open programs here — has been almost entirely unaffected by federal policy churn: state R&D credits, green banks, C-PACE authorities and training funds ran on their own cycles right through it.

The open cleantech program directory: 149 of 250, grouped by what the money does

This directory lists every one of the 149 clean-technology programs in the GrantCompass catalog that was open to applications on August 28, 2026, grouped by what the money actually does rather than by who funds it. The inclusion rule is stated exactly: a program appears if its catalog record lists clean-technology or renewable-energy among its eligible industries, which is 250 of the 736 programs in the catalog, and if its status is active with either a published deadline that has not passed or an intake its own notice describes as rolling, year-round, continuous or ongoing — and does not describe as none of those — which is 149 of those 250. The 101 programs in the slice that are closed, paused, between intakes or upcoming are not listed here — several of the most important are described in the volatility section above, and none of them has ceased to exist.

How this directory is organized, and what the two halves mean

The 250-program slice comes from a broad industry-tag match, and a broad tag match is a starting point rather than a verdict. Roughly two fifths of what it returns is money aimed at clean technology; the rest is general business money that happens to name clean technology among a dozen eligible sectors. Rather than dropping the second group or presenting both as the same thing, this directory splits them. The first half — 56 programs — is money aimed at clean technology, clean manufacturing, or the research and prototyping a cleantech company competes for on its own merits. The second half — 93 programs — is money a clean-technology company can claim as a business, not as a cleantech business. Both halves are real; only the first is what most readers mean by a cleantech grant.

Half one: money aimed at clean technology, clean manufacturing and research

Fifty-six of the 149 open programs are either built for clean energy specifically or fund the research, prototyping and manufacturing scale-up a clean-technology company does. Federal clean-energy programs account for 15 of them, state clean-energy programs for 8, federal research competitions for 11, state SBIR and STTR match programs for 5, state proof-of-concept and commercialization grants for 11, and advanced-manufacturing and capital-investment incentives for 6. That distribution is itself the finding: deep clean-energy-specific money is federal and thin on the ground, and the state layer contributes far more through generic innovation and manufacturing programs than through anything carrying "clean energy" in its name.

Federal programs built for clean energy

Fifteen federal programs in this slice exist specifically to fund clean energy, clean fuel or industrial energy work, and were open to applications or enrolment on August 28, 2026. They divide five ways. Competitive grants: the DOE EERE announcements, the Office of Science solicitation and the advanced nuclear licensing cost-share, the last two closing September 30, 2026. Prizes: the American-Made challenges, year-round, with national laboratory vouchers attached. Capital: the DOE ATVM loan facility. Free or in-kind support: Onsite Energy assessments, USDA BioPreferred certification and the Wells Fargo IN2 incubator. Tax credits: §48E, §45Y, §45X, §45Q and §45Z, claimed on a return rather than applied for and covered in full in their own sections above. Two rows carry status caveats stated in the table.

State clean-energy programs: green banks, C-PACE and MassCEC

Only eight of the 107 open state programs in this slice are built specifically for clean energy, and six of those eight are financing rather than grants. Connecticut Green Bank and Rhode Island Infrastructure Bank both run C-PACE, which finances up to 100% of a commercial clean-energy retrofit against a property assessment rather than a corporate balance sheet — the single most useful instrument for a building owner who cannot fund the capital. Michigan Saves and Nebraska's Dollar and Energy Saving Loans do the same job through lender networks, and NYSERDA's small business financing runs through NY Green Bank. The two real grants are Massachusetts programs: MassCEC Catalyst, up to $75,000 for climate-tech prototypes and closing September 30, 2026, and the MassCEC clean energy internship wage subsidy at $4,320 to $8,640 per intern.

Federal R&D competitions a cleantech company can win

Eleven federal research competitions in this slice were open or in an active cycle on August 28, 2026. The NSF track — SBIR and STTR Phase I at up to $305,000, full proposals due November 4, 2026 under solicitation NSF 26-510, with an invited project pitch required first — is the most accessible entry point for a clean-technology startup. DOE STTR Phase I runs $200,000 to $250,000 and closes September 10, 2026. Two NIH rows appear only because the catalog lists clean technology among their industries; NIH funds biomedical research.

State SBIR and STTR match programs

Five states in this slice pay a match on top of a federal SBIR or STTR award, which is the highest-yield money on this page relative to effort: the hard work — winning the federal award — is already done, and the state application is a short form referencing it. Wyoming matches up to $100,000 on a Phase I and $200,000 on a Phase II. Indiana's FAST program adds up to $75,000 per Phase II award, Vermont up to $50,000, Montana up to $30,000 per phase, and Utah's UTIF microgrant $5,000 toward proposal costs before you win anything. Match programs are typically first-come against an annual appropriation rather than competitively scored, so timing matters more than polish. Alabama's Innovation Grant, which reaches $250,000, is not counted open here: its own notice says its rounds are periodic and explicitly not rolling.

State proof-of-concept, prototype and commercialization grants

Eleven state programs fund the stage between a laboratory result and a sellable product, and a hardware cleantech company is squarely in their target population. Connecticut runs three of them — a pre-seed program to $150,000, a proof-of-concept fund issuing $50,000 to $100,000 convertible notes, and the Manufacturing Innovation Fund voucher at $6,250 to $100,000. Pennsylvania's Ben Franklin Technology Partners invests $50,000 to $500,000. Nebraska's prototype grant reaches $150,000, Illinois' innovation voucher $75,000, South Carolina's SCRA startup grants $25,000 to $50,000 non-dilutive, Maine's MTI seed grant $5,000 to $50,000, and South Dakota's proof-of-concept program $25,000. Maryland's TEDCO contributes a seed fund and a $25,000 rural innovation initiative. Almost all are rolling, and almost all require the company to be domiciled or operating in the state.

Advanced manufacturing and capital-investment incentives

Six programs in this slice reward capital investment in a manufacturing facility, which is where a cell, module or component producer finds state money to sit under §45X. New Jersey's Next New Jersey Manufacturing Program credit is the largest, at up to 25% of capital investment against a $500,000,000 statewide allocation, running until the credits are committed or March 1, 2029. Indiana's Hoosier Business Investment credit reaches 10% of qualified investment, or 25% for logistics. Arizona's Advanced Manufacturing Facilities grant pays up to $75,000 on a 1:1 match. MassDevelopment's Emerging Technology Fund lends up to $4,000,000 for equipment and facilities, and Wisconsin's Technology Development Loan covers up to 20% of project cost. Washington's machinery and equipment sales-tax exemption is not a credit at all but a full exemption at the point of purchase.

Half two: money you can claim as a business, not as a cleantech business

The remaining 93 open programs list clean technology among their eligible industries but are not about clean technology. They are research credits, job-creation incentives, workforce training reimbursements, general-purpose debt, export support, investor credits and pitch competitions — the ordinary machinery of US state economic development, available to a solar installer on exactly the same terms as to a machine shop. They are listed rather than omitted for two reasons: the aggregate is large, and a clean-technology company that ignores them leaves recoverable money behind. But they are not evidence that a state funds clean technology, and this page does not count them that way.

Research credits: the federal §41 credit, §174 expensing, and the eight highest-rate states

Every company doing qualified research in the United States has access to the federal §41 credit, and eighteen states in this slice run a version of their own on top of it. Sitting alongside the credit is §174, which governs whether the same research spending is deducted in the year it is incurred or amortised over five — a cash-flow question rather than a credit, and one the OBBBA reopened for small businesses with retroactive relief for 2022–2024. The eight highest-rate ones are worth checking first: Louisiana pays a tiered 30%, 10% or 5% of state qualified research expense; Vermont 27% of the Vermont-apportioned federal credit; Arizona 24% then 15%; Rhode Island 22.5%; Connecticut 20% incremental; Hawaii 20% and refundable, which matters more to a pre-revenue company than a higher headline rate; Indiana 15%; California 15%. None requires a competitive application.

Research credits at 10% or below, in ten more states

Ten further state research credits in this slice sit at or below 10% of qualified research expense, and they are worth claiming for the same reason a small deduction is worth claiming: the work of computing the base is already done for the federal §41 claim, so the marginal effort is a state schedule rather than a new study. Massachusetts, Minnesota, New Jersey and Georgia each pay 10% of incremental qualified research expense, with Massachusetts adding 15% for university research contracts and Minnesota tapering to 4% above the first $2,000,000. Wisconsin pays 5.75%, or 11.5% for qualifying internal-combustion-alternative and energy-efficiency research. Ohio pays 7% against the commercial activity tax, Illinois 6.5%, Idaho 5%, Utah 5% incremental or 7.5% on volume, and Kentucky 5% of what a qualified research facility costs to build.

Job credits paid out of new-hire withholding or payroll

Fifteen programs here pay a percentage of the payroll or state income-tax withholding generated by jobs you create, usually over five to ten years. North Carolina's JDIG returns 25% to 75% of new-hire withholding, Ohio's Job Creation Tax Credit the same range. Per-job flat credits are simpler: South Carolina pays $1,500 to $25,000 per job by county tier, Tennessee $4,500 rising to $22,500 in Tier 4. Nearly all must be applied for before you hire.

Negotiated location grants and investment abatements

Twelve programs in this slice are negotiated deal by deal rather than claimed by formula, which makes them the largest numbers on the state side and the least predictable. The Texas Enterprise Fund negotiates $500,000 to $50,000,000; Michigan's Business Development Program $10,000 to more than $10,000,000; Tennessee FastTrack typically $250,000 to $5,000,000; Wyoming's Business Ready Community program up to $5,000,000 for facility infrastructure. Utah's EDTIF returns up to 30% of the new state taxes a project generates, and START-UP NY can zero a company's state tax for ten years. All expect you to approach before you announce a location.

Training funds that reimburse what you spend

Twelve state training funds reimburse a share of what you spend training incumbent or newly hired workers, and they are the most reliably under-claimed money in this catalog because they do not look like grants. Pennsylvania's WEDnetPA pays up to $2,000 per worker and $50,000 per company per year, on a cycle restarting each August 1. Texas reaches $500,000 per contract; Colorado $1,500 per employee to a $150,000 ceiling. New Mexico's JTIP reimburses 50% to 90% of wages for up to six months. Illinois's ETIP is not counted open here: its own notice describes competitive NOFO rounds rather than a rolling intake.

States that deliver the training itself, free

Four states do not reimburse training at all — they build and deliver it for you at no charge, which is a materially better deal than a reimbursement because it costs nothing up front and consumes none of your staff's instructional time. Alabama's AIDT designs recruitment, assessment and pre-employment training for a new or expanding facility and covers all costs; it is consistently rated among the strongest state training programs in the country. Georgia Quick Start does the same, including custom curriculum and simulation, and is engaged during site selection rather than after. Louisiana's LED FastStart and North Carolina's Customized Training Program follow the same in-kind model through the state's community college system. All four are contacted directly rather than applied for, and all four expect the conversation to start before a facility opens.

Federal loan guarantees, infrastructure grants and place-based credits

Seven federal programs provide capital or place-based tax benefit rather than clean-energy grants, and a cleantech company qualifies on the same terms as any other business. The guarantees are the largest instruments in the catalog by ceiling: USDA's Business and Industry guarantee to $25,000,000, SBA 504 to $5,500,000 for owner-occupied real estate and heavy equipment, and the SBA Made in America guarantee to $5,000,000. EDA's Public Works and Economic Adjustment Assistance funds $100,000 to more than $10,000,000 of infrastructure — the rare federal construction grant, though it goes to public bodies and non-profits partnering with industry rather than to companies directly. Two federal tax incentives sit here rather than with the energy credits because they are place-based: the New Markets Tax Credit, which delivers below-market loans of $2,000,000 to $20,000,000 through certified development entities, and the Qualified Opportunity Zone incentive.

State authorities and CDFI capital

Nine state authorities and mission lenders in this slice provide capital that a bank often will not, at terms a bank often will not match. West Virginia's First Small Business Growth program lends $1,000,000 to $7,500,000 per company; Pennsylvania's PIDA makes below-market loans for land, buildings and machinery; South Dakota's REDI Fund lends up to $3,000,000 as a forgivable loan; Virginia's VSBFA Economic Development Loan Fund covers up to 40% of a project to $1,000,000; Hawaii's HI-CAP deploys federal SSBCI money as loans and collateral support. Coastal Enterprises, a CDFI covering the six New England states, lends $5,000 to $5,000,000 and takes equity. California's IBank venture capital program and NJ Accelerate's $250,000 loan plus rent support are structured for companies raising alongside institutional investors. Behind several of them sits Treasury's SSBCI 2.0, the federal capital pool the states deploy as loan guarantees, collateral support and venture co-investment — $10,000 to $10,000,000 depending on which state programme it funds, with each state setting its own terms and dates.

Export grants for cleantech hardware sellers

Four export programs in this slice reimburse the cost of selling abroad, which matters disproportionately to clean-technology manufacturers because the addressable market for a component or system is rarely domestic. The federal SBA State Trade Expansion Program flows through the states and typically reimburses $2,500 to $15,000 per company against trade shows, translation, compliance testing and international marketing. Colorado's Advanced Industries Export Grant reaches $15,000 and runs in dated cycles — the cycle that opened July 1, 2026 closed on August 27, 2026, so the next round is the relevant one. New York's Global NY STEP pays $2,000 to $5,000 per activity first-come until funds are exhausted, and Oregon's export promotion program up to $7,500. These are reimbursements, so the company fronts the cost and claims afterwards.

Investor-side credits: the money goes to whoever writes your check

Five state credits in this slice are frequently mistaken for company funding and are not: the credit is claimed by the person or fund that invests in you, not by you. Connecticut's angel credit pays the investor 25% of the investment; Kentucky's 25% to 40%; Wisconsin's 25% capped at $250,000 a year; Indiana's venture capital investment credit 25% to 30%; Minnesota's angel credit 25% and refundable. The company's role is to obtain qualified-business certification from the state agency, which is a real administrative task with real eligibility criteria — industry, headcount, in-state payroll — and which then makes an investment in your company materially cheaper for a local investor. Treat these as a fundraising tool and a reason to talk to in-state angels, not as a line in your funding plan.

Prize competitions and accelerators

Five open competitions and accelerators list clean technology among their eligible sectors, and their expected value is mostly not the cash. gener8tor invests $100,000 for equity across cohorts in a dozen states. Startup World Cup runs regional heats toward a $1,000,000 investment prize; the Entrepreneurship World Cup awards $20,000 to $200,000 equity-free at global finals; SXSW Pitch awards an undisclosed cash prize and a great deal of exposure. For all three, tens of thousands of entrants compete for a handful of prizes, so the realistic return is investor access and mentorship rather than money. Patagonia's environmental grants, at $5,000 to $30,000, are included because the catalog lists clean technology among their industries, but the program's centre of gravity is grassroots environmental organizations rather than for-profit clean-energy companies — read that row with that caveat.

What this directory leaves out, and why

Four categories are deliberately absent. The 101 non-open programs in the slice — closed, paused, between intakes or upcoming — are excluded because listing them as findable money would be misleading; USDA REAP, DOE SBIR, ARPA-E IGNIITE, DOE CINR, EPA Brownfields, DOE GRIP and California Competes are named and dated in the volatility section instead. The federal tax credits — §48E, §45Y, §45X, §45Q, §45Z, §30C and §179D — have their own sections above and are never counted in any grant total on this page. Five of them are in the directory as credits, in the federal clean-energy group; §30C is not, because the catalog records it as discontinued, and §179D is not in this slice at all, because its record does not list clean technology among its industries. Municipal and utility rebate programs are not in this slice at all, and for a building-efficiency retrofit your local utility is often the fastest money in the stack. Programs whose industry tags include clean technology but whose real audience is not a for-profit clean-energy company — the two NIH research rows and the Patagonia environmental grants — are flagged in their group lead rather than silently deleted.

The numbers behind US cleantech funding

Of the 736 US business funding programs in the GrantCompass catalog, 250 list clean technology or renewable energy among their eligible industries, 149 of those were open to applications on August 28, 2026, and 62 of the 149 are grants. The rest of the open set is 47 tax credits, 19 loans including one forgivable loan, 17 advisory or certification programs, and 4 prize competitions. Among the 85 open programs that publish a numeric ceiling, the median is $305,000; among the 62 open grants specifically, 55 publish a ceiling and their median is $150,000. For comparison, the median across the whole 736-program catalog is $150,000, so clean-technology programs run roughly twice the typical US size.

The instrument mix of the 149 open programs

Grants are the largest single instrument in this slice but they are not a majority, and the shape of the distribution is the argument this whole page makes. Forty-two percent of what is open to a clean-technology company is a grant; thirty-two percent is a tax credit claimed on a return with no application at all; thirteen percent is debt; eleven percent is a service, certification or free assessment; three percent is a prize. A founder who searches only for "grants" is working with 42% of the available field, and — because the tax credits include §48E, §45X, §45Y and §45Q — the 42% almost certainly excludes the largest number available to them.

Who funds it, and where it can be claimed

The open set is overwhelmingly state money by count and federal money by size. 107 of the 149 open programs are state-level, 35 are federal and 7 are private — but the federal 35 carry every ceiling above $20,000,000 in the slice, and the mean ceiling among the 85 open programs publishing one is $4,016,603 against a median of $305,000, which is what a handful of nine-figure federal facilities does to an average. Geography is broad rather than concentrated: 46 of the 50 states appear somewhere in the open set — Alaska, Iowa, Kansas and Mississippi are the four with no state-specific program in this slice — and 41 of the 149 programs are national, available everywhere. Thirty-one of the 149 require matching funds or cost share.

Deadlines barely matter in this slice

136 of the 149 open clean-technology programs have no fixed deadline at all — their own notices describe intake as rolling, year-round, continuous or ongoing. Only 13 carry a published deadline that has not yet passed. That ratio, roughly ten to one, is the opposite of how people search this topic: "cleantech grant deadline 2026" assumes a calendar that mostly does not exist. It has a practical consequence. Because rolling programs are usually first-come against an annual appropriation rather than scored against a cohort, being early in a fiscal year matters more than being polished, and the median estimated application effort across the 149 open programs is 20 hours — a week of work, not a quarter of one.

Two different slices, and why our own counts differ

GrantCompass publishes more than one count of clean-energy programs, and they are computed differently rather than inconsistently. This page uses the 736-program catalog filtered to records listing clean-technology or renewable-energy as an eligible industry: 250 programs, 149 open. The companion open-now page uses a slightly wider net that also picks up programs tagged energy-efficiency: 268 programs, 166 open, 64 of them grants. The program finder at the top of this page runs on an older derived dataset — the "Clean Energy & Environment" bucket of the GrantCompass eligibility map, 299 records out of 631 — which is why its own counts are higher again. Each number is correct for its stated slice; none of them is a count of "cleantech grants."

Cleantech funding paths by persona

The right funding stack for a clean-technology company is determined almost entirely by what the company does, not by how ambitious its climate goal is. A manufacturer claims a per-unit production credit and never writes a proposal. A pre-commercial hardware startup writes proposals constantly and has no energy property to claim against. An installer sits between its customers' credits and its own. An efficiency services firm lost its main deduction in June 2026 and has to work the remaining three routes. A fuels or carbon producer has the most valuable per-unit credits in the code and the longest development timelines. Six paths follow; each names its primary instrument, the stack that goes under it, and the mistake that most often costs money.

Where do I start? Decision trees for sequencing your funding stack

Three questions decide the order in which a clean-technology company should approach US funding, and they have to be answered in this sequence: which tax credit attaches to what you do, how you convert that credit into money given your entity type, and which competitive grant fits your stage. Sequence matters because the answers interact — a federal grant reduces the basis of a credit, an entity type determines whether a credit is cash or a paper offset, and a grant application takes a month of work that a credit claim does not. Work the trees below top to bottom.

How this page was researched, and how to tell us it is wrong

This page is maintained by the GrantCompass US research team and was last substantively revised on August 28, 2026. Every statutory rate, deadline and termination date above was checked against a primary or agency source in the week of that revision, and every catalog figure was recomputed from the GrantCompass US catalog of 736 programs on the same date. Where a fact could not be verified — an appellate outcome, a restart date, a transfer price — the page says so in the sentence rather than in a footnote. Clean-energy funding moved more in the last twelve months than any other topic we cover, so treat dates on this page as the position on August 28, 2026 rather than as permanent.

Sources used for the statutory and program facts

The tax provisions were checked against the statute and against IRS and Treasury releases: Public Law 119-21 (the One Big Beautiful Bill Act, enacted July 4, 2025) for the terminations and phase-outs; IRS Notice 2025-42 for the beginning-of-construction rules and the 1.5 MW low-output solar definition; Executive Order 14315 of July 7, 2025, 90 F.R. 30821, for the enforcement directive; and Revenue Procedure 2025-32 for the 2026 inflation-adjusted §179D rates. The June 6, 2026 vacatur of Notice 2025-42 in Oregon Environmental Council v. Internal Revenue Service, No. 25-4400 (CKK) was read through contemporaneous client alerts from McGuireWoods, Holland & Knight, Gibson Dunn and Troutman Pepper Locke, all published in June 2026. All web sources were read on August 28, 2026.

Sources used for the program-status facts

The USDA REAP pause is recorded from USDA Rural Development's March 31, 2026 announcement, reported and quoted by the National Sustainable Agriculture Coalition on April 1, 2026, which carries the Richa Patel quotation used above; USDA's own REAP FAQ dated 03/31/2026 was not retrievable at the time of writing, so the pause is reported at one remove and labeled as such. The DOE ITAC implementation grant hold is recorded from the program's own opportunity notice. Every program-level status, ceiling and intake statement comes from the GrantCompass catalog record for that program, which is linked from each table row so you can check the underlying entry.

What this page deliberately does not claim

GrantCompass does not publish approval statistics, applicant counts or odds of any kind on public pages, and nothing above should be read as a prediction that any application will succeed. Award ceilings are the maximum a program publishes, not what a typical recipient receives. "Open" is a statement about a program's published intake on August 28, 2026, not a guarantee that funds remain — first-come programs close early without notice. Nothing here is tax or legal advice: the §48E, §45X, §45Q, §45Z and §45V positions above turn on facts specific to your project, and the compliance conditions are strict enough that a qualified adviser is worth more than the fee on any project of scale.

Corrections and contact

If a date, rate or status on this page is wrong, we would rather know than be cited incorrectly. Write to hello@grantcompass.co with the program name and the source that contradicts us, and both the catalog record and this page will be corrected. Every program listed here links to its own GrantCompass record, which carries the funder, the organization administering it, the published amount and the intake we could substantiate; if a table row and a program page disagree, the program page is the newer of the two. Programs are re-verified on a monthly cycle, and this page is republished whenever the underlying catalog changes materially rather than on a fixed schedule. GrantCompass US is operated at grantcompass.co; the full 736-program database is browsable at /explore, and the free matcher at /match ranks the programs on this page against your own company profile.

Frequently asked questions