By Emily Bennett · Reviewed for technical accuracy by Daniel Ostrow, CPA, MST · This article covers U.S. federal tax law only. State-level credit rules vary and are not addressed here.
Two solar installers filed similar tax returns last spring. Both had earned a six-figure clean energy tax credit. Both owed far less tax than the credit was worth. One owner shrugged, carried the credit forward, and moved on. The other sold part of that same credit for cash within four months and used the proceeds to hire two technicians.
Same credit. Same tax code. Wildly different outcomes. The difference wasn’t luck. It was knowing that a tax credit on a small business’s books is not the same thing as cash in the bank. The gap between the two now has more than one bridge across it.
Quick answer: If your small business earned a tax credit but can’t use all of it this year, you have four realistic paths.
Carry the unused amount back one year or forward up to 20 years. Elect a payroll-tax offset instead, if you qualify as a small R&D claimant. Sell an eligible clean-energy or manufacturing credit to another taxpayer under Section 6418. Or work with a monetization intermediary who structures a transfer or financing deal around the credit.
Which path fits depends on the credit type, your entity structure, and how badly you need cash now versus later.
Who This Actually Applies To
This guide is written for a specific kind of small business owner. Someone who did the work to earn a tax credit, then discovered the credit is worth more on paper than it is in practice. That happens constantly.
- A bakery claims the Work Opportunity Tax Credit for hiring two people off long-term unemployment.
- A ten-person software shop racks up qualified research expenses and generates an R&D credit.
- A small commercial property owner installs solar and qualifies for the Section 48 investment tax credit.
In every case, the credit is real. The tax bill it’s supposed to offset often isn’t big enough to absorb it.
That mismatch is common among pass-through entities, early-stage companies, seasonal businesses, and any small operation whose income swings year to year. It is not a sign you did something wrong. It’s a structural feature of how general business credits work: they only reduce tax you actually owe, and most small businesses don’t owe a steady, large amount of tax every single year.
If any of this sounds familiar, the rest of this guide walks through your realistic options, in the order most owners should consider them.
Not tax or legal advice. This article explains general federal rules as of mid-2026 for educational purposes. Credit eligibility, election mechanics, and IRS guidance change frequently, and your specific facts — entity type, credit type, prior-year returns — determine what actually applies. Talk to a CPA or tax attorney before filing an election or signing a transfer agreement.
Path 1: Carry the Credit Back or Forward
Every general business credit, from Section 41 research credits to Section 45 clean energy production credits to the Work Opportunity Tax Credit, funnels through the same statutory plumbing. Section 38 limits how much credit you can use in a given year. Section 39 tells you what happens to the rest.
Under Section 39(a)(1), an unused general business credit is carried back one year first, then forward for up to 20 years if it still can’t be absorbed. That 20-year window is long. It is also the default path. You don’t elect it. It simply happens if you don’t do anything else.
The Section 38 limit, in plain terms: usable credit for the year caps out at net income tax. Subtract the greater of tentative minimum tax, or 25% of net regular tax liability above $25,000. Credits typically can’t wipe out an entire tax bill in one year. A meaningful slice of liability stays protected from credit offset, which is exactly why even profitable small businesses end up carrying credits forward.
Carryforward costs nothing to elect and requires no third party. That’s its appeal. It’s also its weakness.
A credit earned today and used in year six has lost real value. Inflation, a foregone investment return, and plain time value of money all chip away at it. Carryforward is the right default only when a business expects a specific, foreseeable jump in taxable income within two or three years. Beyond that horizon, it starts to look like leaving money on a shelf and hoping it doesn’t spoil.
My honest take: most owners default to carryforward out of inertia, not analysis, and rarely run the comparison that would tell them otherwise.
The R&D Payroll Offset Exception
One exception worth knowing: Qualified small businesses claiming the R&D credit under Section 41(h) can skip carryforward entirely for part of the credit.
Two thresholds decide eligibility: gross receipts under $5 million this year, and five years or fewer of gross receipts history. Meet both, and you can elect to apply up to $500,000 of the R&D credit against the employer’s 6.2% Social Security payroll tax instead of income tax. That cap has applied since tax years beginning in 2023, raised from a much smaller figure under the Inflation Reduction Act.
It’s claimed on Form 6765 and then applied on Form 941: cash relief you feel in payroll, not years from now on a return.
Path 2: Direct Pay (Elective Pay) Elections
Section 6417 lets certain organizations treat a tax credit as if it were a tax payment and collect a refund for it, even with zero tax liability. It’s a genuinely useful tool. It’s also, for most small businesses, mostly out of reach.
Final regulations took effect for tax years ending on or after March 11, 2024. The IRS defines “applicable entities” eligible for direct pay as:
- Tax-exempt organizations
- State and local governments
- The Tennessee Valley Authority
- Indian tribal governments and Alaska Native corporations
- Rural electric cooperatives
- U.S. territories and the District of Columbia
Notice who’s missing: ordinary small businesses, S corps, partnerships, and sole proprietors.
There is a narrow carve-out, though. A regular taxable business can elect direct pay only for credits tied to three sections: 45Q (carbon capture), 45V (clean hydrogen), or 45X (advanced manufacturing). Per IRS guidance, the election runs for five consecutive tax years per eligible property, with one revocation allowed during that window.
For the vast majority of small businesses holding an R&D credit, a WOTC credit, or a general clean-energy investment credit, direct pay simply doesn’t apply. Rule it out quickly rather than spending hours chasing an election you don’t qualify for.
Path 3: Transferability for Eligible Clean Energy and Manufacturing Credits
This is the path that changed the math for small clean-energy project owners more than any other provision in the last several years. Section 6418, created by the Inflation Reduction Act, lets an eligible taxpayer sell all or part of certain tax credits to an unrelated buyer for cash. One time, no repeated resale, and the cash has to move as cash, not services or property.
Final regulations were published April 30, 2024.
Eleven categories of credits qualify for transfer. Most sit in clean energy and manufacturing, including:
- Production tax credits under Section 45
- The carbon capture credit under Section 45Q
- The clean hydrogen credit under Section 45V
- The advanced manufacturing credit under Section 45X
- The clean electricity production credit under Section 45Y
- The investment tax credit under Section 48, among others in that same family
Credits tied to partial or in-progress construction, known as progress expenditures, can’t be transferred. Any bonus amounts, such as domestic content, energy community, or low-income adders, have to move with the base credit rather than being sold separately.
Why This Matters for Small Clean-Energy Owners
Credit transferability is the specific tool many small clean-energy project owners now use. It turns credits they otherwise couldn’t fully use into cash. A solar contractor who installs a system for a client generates one common example. So does a small developer who owns a handful of community solar arrays.
Either one can end up with a Section 48 credit far larger than the entity’s own tax bill. Rather than sitting on it for years, the owner sells it to a corporation with real tax liability instead. For background on how the mechanics and risk allocation typically work in these deals, see our companion piece on clean energy tax credit transfer arrangements.
What pricing looks like: according to Crux Climate’s 2025 market data, investment-grade ITC transfers priced between roughly $0.92 and $0.95 per dollar of credit face value, and PTC transfers between about $0.92 and $0.96. Non-investment-grade sellers, which describes most small businesses, saw lower pricing, down toward $0.901 per dollar in some deals. That’s a real haircut. It’s also real cash, often within months rather than years.
One limitation matters more than any other for this audience. Transferability only covers the clean-energy and manufacturing credit list above. It does not extend to the R&D credit or the Work Opportunity Tax Credit. A restaurant with an unused WOTC balance cannot sell it. A software company can’t sell its R&D credit to a bigger buyer down the street. Those two credits are stuck with carryforward, the payroll offset where it applies, or a monetization intermediary structuring something else entirely.
Path 4: Credit Monetization Intermediary Services
A cottage industry of brokers, marketplaces, and advisory firms now connects small credit generators with buyers. Some also structure financing secured by a future credit. Crux, Reunion, and several regional investment banks run active transferable-credit marketplaces. Total tax credit monetization activity, combining tax equity investment and credit transfers, was projected at roughly $55 billion to $60 billion for all of 2025. Tax credit transfers alone accounted for an estimated $11 billion to $13 billion of that.
These intermediaries earn a fee, usually a percentage of the deal, for finding a buyer, handling diligence, and drafting the transfer agreement or advance-payment structure. For a small business without in-house tax counsel, that fee often buys real value: faster timelines and fewer unpleasant surprises at closing. I’d rather see an owner pay 3% to a broker who closes in ten weeks than save that fee and spend six months learning the market the hard way.
Two things determine whether an intermediary is worth it for you: the size of the credit, and whether you already have a relationship with a buyer or lender who would do the deal directly. Below a certain size, roughly in the low hundreds of thousands of dollars, intermediary fees can eat a meaningful share of the proceeds. It’s worth getting at least one direct quote from a corporate buyer or your own accounting firm’s network before committing to a broker.
A Worked Example: Selling a Credit You Can’t Fully Use
Take a small business that installs solar for commercial clients and also owns a handful of its own rooftop systems leased to tenants. In 2026, the business qualifies for a $220,000 Section 48 investment tax credit on a system it owns outright. Its federal income tax liability for the year, after normal deductions, is $48,000.
Under Section 38’s limitation, the business can use only enough credit to offset that $48,000 liability, minus the protected 25%-over-$25,000 slice, which in this case is small. That leaves roughly $172,000 of credit unused for the year.
| Path chosen | Cash timing | Approximate net result |
|---|---|---|
| Carryforward only | Spread over future years, as liability allows | Full $172,000 eventually usable, if profits grow enough. No cash now. |
| Transfer under Section 6418 | Roughly 60–120 days after execution, common in current practice | Sold at $0.91/dollar: $156,520 cash, minus a roughly 4% intermediary fee, nets about $150,000 this year |
The business gave up roughly $22,000 of face value to get $150,000 in the bank within a quarter instead of an uncertain amount spread across a decade. For a business trying to fund a hiring push or a second location now, that trade often makes sense. For a business confident it will owe $170,000-plus in tax within two years anyway, carryforward might win. There’s no universally correct answer, only a correct answer for your cash position this year.
What a $1.00 Credit Actually Sells For
The chart below shows typical 2025 transfer pricing by seller profile, expressed as cash received per dollar of credit face value. The dashed line marks full face value. No deal actually prices there, which is the point.
Source: Crux Climate 2025 mid-year and transferable tax credit market data. Ranges are indicative and vary by technology, credit support, and buyer demand.
Comparing the Four Paths
No single reference table replaces a conversation with your CPA, but this one is a reasonable starting point for narrowing down which path fits your situation.
| Path | Who’s eligible | Speed to cash | Cost |
|---|---|---|---|
| Carryback / carryforward | Any business with a general business credit | Slow: one year back, up to 20 forward | None to elect; value erodes over time |
| R&D payroll offset (Sec. 41(h)) | Gross receipts under $5M, 5 years or fewer of receipts | Fast: same year, via quarterly payroll filings | Capped at $500,000/year; filing effort only |
| Direct pay (Sec. 6417) | Mostly tax-exempt/government entities; narrow exception for 45Q/45V/45X | Moderate: refund cycle after filing | Low direct cost; limited applicability |
| Transfer (Sec. 6418) | Eligible taxpayers holding listed clean-energy/manufacturing credits | Fast: commonly weeks to a few months | Discount of roughly 4–10% off face value, plus advisory fees |
Common Mistakes Small Business Owners Make Here
- Assuming every credit is transferable. Only the Section 6418 list qualifies. R&D and WOTC credits are not on it, no matter how badly you need the cash.
- Missing the payroll offset window. The Section 41(h) election has to be made on a timely-filed original return, including extensions. Miss it, and you’re back to carryforward for that year’s R&D credit.
- Trying direct pay without checking the applicable-entity list first. Most taxable small businesses waste hours here before realizing only 45Q, 45V, and 45X credits allow the narrow exception.
- Skipping the pre-filing registration step. Both direct pay and transfer elections require IRS pre-filing registration before the return is due. Forgetting it can delay or void the election entirely.
- Treating a transfer discount as a loss instead of a financing cost. Selling at $0.91 on the dollar isn’t losing 9%. It’s paying roughly 9% for immediate liquidity, sometimes a good trade, sometimes not, but not automatically bad.
A Practical Decision Checklist
- ☐ Identify exactly which credit you’re holding and confirm the applicable IRC section: 41, 45, 48, or another.
- ☐ Calculate this year’s Section 38 limitation to see how much credit you can actually use now.
- ☐ Check whether your credit appears on the Section 6418 eligible-credit list.
- ☐ If it’s an R&D credit, confirm whether you meet the Section 41(h) small-business thresholds before your extended filing deadline.
- ☐ Complete IRS pre-filing registration early if pursuing transfer or direct pay. This is not a same-week process.
- ☐ Get at least one intermediary quote and one direct-buyer quote before signing a transfer agreement.
- ☐ Model the cash-now-versus-cash-later trade against your actual 12–24 month liability forecast, not a hopeful one.
Key Takeaways
- Carryforward is free and automatic, but a credit used in year seven is worth noticeably less than one used this year.
- The Section 41(h) payroll offset is the fastest path for qualifying small R&D claimants: up to $500,000 against payroll tax, same year.
- Direct pay under Section 6417 is mostly closed to ordinary taxable small businesses, apart from a narrow five-year window for 45Q, 45V, and 45X credits.
- Transferability under Section 6418 is the real opening for small clean-energy and manufacturing credit holders, typically pricing between $0.90 and $0.96 per dollar of face value.
- Intermediaries charge for speed and certainty. Whether that’s worth it depends on deal size and your own network.
Frequently Asked Questions
Can a small business sell its R&D tax credit for cash?
No, not under Section 6418. The R&D credit isn’t on the list of transferable credits. A qualifying small business can instead apply up to $500,000 of it against payroll tax under Section 41(h), or carry the rest forward.
How long can an unused general business credit be carried forward?
Up to 20 years, after first being carried back one year, under Section 39(a)(1). The same tax-liability limitation from the original year still applies in each carryforward year.
Is direct pay available to a regular small business?
Only in a narrow case. Ordinary taxable businesses can elect direct pay solely for credits tied to Sections 45Q, 45V, or 45X, for five consecutive tax years per eligible property, with one revocation allowed. Every other applicable-entity category is limited to tax-exempt and government-type organizations.
What does it typically cost to sell a clean energy tax credit?
Based on 2025 market pricing, investment-grade sellers received roughly $0.92 to $0.96 per dollar of credit face value; smaller, non-investment-grade sellers saw pricing closer to $0.90 to $0.92, sometimes lower. Intermediary or advisory fees are separate from that discount.
Do I need to register with the IRS before transferring a credit?
Yes. Both Section 6418 transfers and Section 6417 direct pay elections require pre-filing registration through the IRS’s online portal before the return claiming the credit is filed. This step has to happen ahead of time, not at filing.
Is the Work Opportunity Tax Credit still available in 2026?
For new hires, no. As of this writing, WOTC lapsed for employees who began work after December 31, 2025, per IRS guidance issued in September 2025. Employers can still claim first-year credit amounts in 2026 for wages paid to workers hired before that date. Congress has revived WOTC more than a dozen times since 1996, often retroactively, so this could change.
References
- 26 U.S.C. § 39 — Carryback and carryforward of unused credits (Cornell Legal Information Institute)
- 26 U.S.C. § 38 — General business credit limitation
- Internal Revenue Service, “Elective pay and transferability frequently asked questions: Elective pay,” irs.gov
- Treasury/IRS final regulations under Section 6417, effective for tax years ending on or after March 11, 2024
- Treasury/IRS final regulations under Section 6418, published April 30, 2024 (Federal Register)
- Internal Revenue Service, Tax Tip 2025-60, “The Work Opportunity Tax Credit is available until the end of 2025,” September 2025
- PwC, “Regulations finalized on direct payment of tax credits” (secondary analysis)
- Baker Tilly, “IRS releases final regulations for section 6418” (secondary analysis)
- JMCO, “Payroll Tax Credit for R&D: A Strategic Option for Startups” (secondary analysis)
- Crux Climate, 2025 mid-year market intelligence report and transferable tax credit pricing guide (secondary market data)
Back to those two solar installers. The one who carried the credit forward isn’t wrong, exactly. He’s just betting on a tax bill that may or may not show up on schedule. The one who sold part of hers for cash within four months made a different bet. Two technicians on payroll now, she decided, beat a marginally larger number on a return she might not file profitably for years. Both bets can pay off. Only one of them put money in the register this quarter.
