This article reflects federal rules as of June 2026 and covers tax years 2022 through 2025. State conformity rules are noted where they apply. Tax law changes often — confirm current figures with the IRS or a licensed professional before you file.
Quick Answer
Yes. For tax years beginning after December 31, 2024, a U.S. business can deduct its domestic R&D costs in full the same year it pays them, under new Section 174A created by the 2025 One Big Beautiful Bill Act. Foreign R&D still must be spread over 15 years.
For the first time since 2021, you do not have to spread your domestic research bill across five tax years. The pain started with the Tax Cuts and Jobs Act, which forced businesses to capitalize and amortize R&D — meaning you wrote off only a fraction each year and paid tax on money you had already spent on labs, code, and engineers. That single rule pushed thousands of profitable startups into surprise tax bills they could not afford.
The 2025 fix, signed into law on July 4, 2025, reverses that for good — and it lets many small businesses reach backward to recover taxes they overpaid in 2022, 2023, and 2024. That backward window is closing fast, with a hard federal deadline of July 6, 2026. According to the National Science Foundation, U.S. businesses perform more than $600 billion in R&D each year, so the dollars riding on this rule are enormous.
Here is what you will learn:
- 🧪 What “deduct R&D right away” really means under the new Section 174A, in plain English.
- ⏳ Why the old TCJA rule cost businesses cash, and exactly what changed on July 4, 2025.
- 💰 Three fully worked dollar examples so you can copy the math for your own return.
- 🔁 How small businesses can claw back overpaid 2022–2024 taxes before the July 6, 2026 deadline.
- ⚠️ The seven costly mistakes that can erase your deduction or your refund.
Which Situation Applies to You?
The answer depends heavily on who you are and which years you are asking about. Tax law here is not one-size-fits-all, so find your row before you read further.
- You are a small business (average gross receipts of $31 million or less) asking about 2025 or later: You simply deduct domestic R&D in full this year. Jump to “How to Deduct R&D Costs in 2025 and Beyond.”
- You are a small business asking about 2022–2024: You may be owed a refund. Read “The Retroactive Window for Small Businesses” — and move fast, because the deadline is July 6, 2026.
- You are a larger business (over $31 million in gross receipts) with leftover 2022–2024 R&D: You cannot amend old years, but you can speed up the leftover deductions into 2025 or 2026. See “Options for Larger Businesses.”
- You have R&D done outside the United States: Different rule. Those costs are still capitalized and amortized over 15 years. See “Foreign R&D Is Still Treated Differently.”
- You also claim the R&D tax credit: You face a coordination rule under Section 280C. See “How Expensing Interacts With the R&D Credit.”
What “Deducting R&D Right Away” Actually Means
A deduction lowers the income you pay tax on. When you “deduct R&D right away,” you subtract the entire research cost from your taxable income in the same year you spend the money. This is also called full expensing or immediate expensing.
The opposite is capitalization and amortization. To capitalize a cost means you treat it as a long-term asset instead of an immediate expense. To amortize it means you write off a slice of that asset each year over a set period. Under the rule that ran from 2022 through 2024, domestic R&D had to be amortized over five years, and foreign R&D over 15 years.
The difference is timing, and timing is cash. If you spend $500,000 on engineers in a year, immediate expensing wipes out $500,000 of taxable income now. Five-year amortization lets you deduct only a fraction now and the rest over the next four years — so you pay tax sooner on money you have already spent. For a young company burning cash, that gap can be the difference between making payroll and missing it.
What Counts as R&D
Research and experimental (R&E) expenditures are the costs of developing or improving a product, process, formula, technique, or software. The IRS and Section 174A treat software development as R&D by default, which sweeps in most tech startups.
Eligible costs include wages for researchers and engineers, supplies used in testing, certain contractor fees, and costs tied to building prototypes. The consequence of misclassifying a cost matters: if you label routine bug-fixing or marketing research as R&D, the IRS can disallow the deduction and add penalties. The fix is simple — keep a contemporaneous record showing each cost ties to genuine technical development, and when in doubt, ask a tax professional to review your cost categories before you file.
What Does Not Count
Section 174 has never covered everything that feels like research. Land, depreciable equipment, mineral exploration, and ordinary quality-control testing fall outside the rule.
The common misconception is that any innovation spending qualifies. It does not. The consequence of stretching the definition is an audit adjustment and back tax. The practical step: separate your true development labor and supplies from capital purchases like machines, which follow their own depreciation rules under Section 168.
The History: How We Got Here
To understand today’s rule, you need the three-act story behind it. Each act changed the cash math for every research-heavy business in America.
Act one — before 2022. Businesses could choose to deduct R&D in full the year they spent it. This was the long-standing default and it rewarded innovation with immediate tax relief.
Act two — 2022 through 2024. The 2017 Tax Cuts and Jobs Act contained a delayed time bomb. Starting in 2022, it stripped away immediate expensing and forced five-year amortization for domestic R&D and 15-year amortization for foreign R&D. Many founders did not see it coming and got hit with tax bills on cash they had already burned.
Act three — July 4, 2025. The One Big Beautiful Bill Act (OBBBA) created Section 174A, which permanently restored immediate expensing for domestic R&D for amounts paid or incurred after December 31, 2024. Unlike many provisions in that law, this one does not sunset — it is permanent, so you can plan around it for the long term.
How to Deduct R&D Costs in 2025 and Beyond
For any tax year beginning after December 31, 2024, the default is simple: domestic R&D is fully deductible the year you incur it. You do not need IRS permission to take the deduction itself — Section 174A makes it the standard treatment.
You report the deduction on your normal business return. Sole proprietors use Schedule C, partnerships file Form 1065, S corporations file Form 1120-S, and C corporations file Form 1120. The deduction flows through to your taxable income just like wages or rent.
You may still elect to capitalize and amortize over at least 60 months if it helps you — for example, if you have no income to offset this year and want to save the deduction. That election is irrevocable without IRS consent, so think it through before choosing it. For most profitable or loss-making startups, taking the full deduction now is the stronger move because it frees up cash sooner.
A Worked Example: 2025 Software Startup
Maria runs a small software company. In 2025 she pays $400,000 in engineer wages and $50,000 in cloud-testing costs — $450,000 of domestic R&D in total.
Under the old 2024 rule, she could deduct only about one-tenth in the first year (half of one year’s 20% share), leaving most of the $450,000 stuck on her books and inflating her taxable income. Under Section 174A in 2025, she deducts the full $450,000 immediately. If her business sits in a combined 30% bracket, that deduction saves her roughly $135,000 in tax in 2025 alone — cash she can put straight back into hiring.
The Retroactive Window for Small Businesses
Here is the part with a ticking clock. A small business — defined as one with average annual gross receipts of $31 million or less over the prior three years — can apply Section 174A retroactively to domestic R&D from tax years 2022, 2023, and 2024.
For most calendar-year filers, that means you can amend your 2022, 2023, and 2024 returns to deduct R&D you were forced to amortize, then collect a refund of the extra tax you paid. Partnerships file an administrative adjustment request (AAR) instead of a plain amended return.
The deadline is firm. You must file by the earlier of July 6, 2026 or the date the statute of limitations closes for the year in question. Miss it, and the refund is gone for good. Because that date is only weeks away as of June 2026, this is the single most urgent action item in this entire article.
What You Have to File
If you already expensed R&D on a 2024 return, you generally need to amend 2022 and 2023 to match. If you never expensed it, you may need to amend all affected years, per Weaver’s guidance.
There is also a smoother path. Rev. Proc. 2025-28 lets some small businesses make an accounting-method change with a “true-up” adjustment on the 2024 return, which can spare them from filing separate amended 2022 and 2023 returns. Talk to a CPA about which route fits, because the right choice depends on whether you have already filed 2024.
A Worked Example: Retroactive Refund
David owns a manufacturing firm with $8 million in gross receipts, well under the $31 million cap. From 2022 through 2024 he spent $300,000 a year on domestic process R&D — $900,000 total — but was forced to amortize it.
Suppose amortization let him deduct only about $270,000 of that $900,000 across those three years, leaving roughly $630,000 of unused deductions trapped. By amending his 2022–2024 returns before July 6, 2026, David claims those deductions now. At a 25% effective rate, recovering $630,000 of deductions yields about $157,500 in refunds — a major cash injection he would lose entirely if he waited too long.
Options for Larger Businesses
If your average annual gross receipts top $31 million, you do not get the retroactive amend-back option. But you are not shut out.
You can deduct the remaining unamortized domestic R&D from your 2022–2024 years in one of two ways: take it all in 2025, or spread it over 2025 and 2026. This is called an acceleration election, and it clears the leftover balance off your books quickly.
The choice is a cash-flow decision. Taking everything in 2025 maximizes this year’s deduction, which helps if 2025 is a high-income year. Splitting it over two years smooths the benefit and may keep you in a lower bracket. Run both scenarios with your tax advisor before you decide, because the election locks in your path.
A Worked Example: Large Company Acceleration
TechCorp has $90 million in gross receipts, so it is over the cap. It carries $2 million of unamortized domestic R&D from 2022–2024.
TechCorp can deduct the full $2 million in 2025, or $1 million in 2025 and $1 million in 2026. At a 21% corporate rate, the full-2025 route saves $420,000 this year; the split route saves $210,000 in each of 2025 and 2026. Same total benefit, different timing — TechCorp picks based on which year it expects higher profits.
Foreign R&D Is Still Treated Differently
One trap catches global companies off guard: Section 174A only fixed domestic research. Research conducted outside the United States must still be capitalized and amortized over 15 years under the amended Section 174.
This creates a bifurcated system — a two-track approach where you must carefully separate U.S. research from foreign research. If you outsource development to an offshore team, that spending does not get immediate expensing.
The consequence of mixing the two is a misstated return and lost deductions. The common misconception is that “our company is U.S.-based, so all our R&D is domestic.” Location of the work, not the company, controls. The step to take: tag every R&D dollar by where the activity physically happens, and keep documentation that supports the split.
How Expensing Interacts With the R&D Credit
The R&D deduction and the R&D tax credit are two different benefits, and the law stops you from double-dipping. The credit under Section 41 is a dollar-for-dollar reduction of tax; the deduction under 174A reduces taxable income.
Section 280C(c) coordinates the two. You must either reduce your 174A deduction by the amount of your research credit, or instead elect to reduce the credit itself. You cannot claim the full deduction and the full credit on the same dollars.
The consequence of ignoring 280C is an overstated deduction and an IRS adjustment. The practical step: if you claim the credit, decide with your preparer whether to trim the deduction or trim the credit — the math differs by company, and the right pick can save real money.
Federal vs. State: Does Your State Follow This?
Federal law now allows immediate domestic R&D expensing, but your state may not. States choose whether to conform to federal tax law, and conformity genuinely varies.
States fall into three camps. “Rolling conformity” states automatically follow the new federal rule. “Static” or “fixed-date” conformity states follow federal law only as of a frozen date, so they may still require amortization until their legislature updates the date. A handful of states decouple from Section 174 entirely and write their own rule.
The consequence is real: you could deduct R&D in full on your federal return but still have to add part of it back on your state return. The step to take is to check your specific state’s conformity status with your state Department of Revenue or a local CPA before you file, because guessing here can trigger a state notice and penalty.
| State Conformity Type | What It Means for Your R&D Deduction |
|---|---|
| Rolling conformity (e.g., many states) | State usually follows federal immediate expensing automatically |
| Static / fixed-date conformity | State may still force amortization until its date is updated |
| Decoupled from Section 174 | State applies its own separate R&D rule regardless of federal change |
Three Common Scenarios
Below are the three situations most businesses fall into, each shown as a quick action-and-result pair.
Scenario 1 — Small startup, 2025 spending.
| Your Move | The Result |
|---|---|
| Deduct all 2025 domestic R&D under Section 174A | Full deduction now, lower 2025 tax, more cash for hiring |
Scenario 2 — Small business, overpaid in 2022–2024.
| Your Move | The Result |
|---|---|
| Amend 2022–2024 returns by July 6, 2026 | Refund of overpaid tax; missing the date forfeits it forever |
Scenario 3 — Large company with leftover R&D.
| Your Move | The Result |
|---|---|
| Elect to accelerate unamortized R&D into 2025 or 2025–2026 | Clears the leftover balance fast; timing chosen for best bracket |
Three Named Examples
Priya, the biotech founder. Priya’s lab spends $1.2 million on domestic research in 2025. Under Section 174A she deducts the full $1.2 million, erasing most of her taxable income and saving her company tens of thousands in tax it can redirect into clinical trials.
Carlos, the app developer. Carlos has $2 million in gross receipts and paid tax on amortized R&D in 2022 and 2023. He files amended returns before July 6, 2026, recovers a five-figure refund, and uses it to extend his runway by several months.
Janet, the CPA. Janet manages a client with offshore developers. She carefully splits the firm’s R&D — deducting U.S. work immediately and amortizing the foreign portion over 15 years — and avoids an IRS adjustment her client never saw coming.
Deadlines, Costs, and Timing
The most important date is July 6, 2026 — the federal deadline for small businesses to file retroactive 2022–2024 elections, per Rev. Proc. 2025-28. For each year, the earlier of that date or the statute of limitations controls.
Refunds from amended returns typically take the IRS several months to process, so filing early protects both your deadline and your cash flow. Going forward, your 2025 deduction is claimed on your normal return at its regular due date.
On cost: a straightforward 2025 deduction adds little to your filing cost. Retroactive amended returns, a Form 3115 accounting-method change, or an R&D credit study are more involved — professional fees can range from a few hundred dollars to several thousand depending on complexity. For a five- or six-figure refund, that fee usually pays for itself many times over.
Mistakes to Avoid
- Missing the July 6, 2026 deadline. The retroactive refund vanishes permanently once the window closes.
- Treating foreign R&D as domestic. Foreign research must still be amortized over 15 years, and misclassifying it triggers IRS adjustments.
- Double-dipping on the deduction and the credit. Ignoring Section 280C overstates your benefit and invites a correction with interest.
- Assuming your state conforms. A state add-back can leave you with an unexpected state tax bill and penalty.
- Misclassifying routine costs as R&D. Labeling bug fixes or marketing as research can get the deduction disallowed.
- Forgetting partnerships file an AAR. Partnerships generally cannot file a plain amended return; using the wrong form delays or denies the refund.
- Failing to keep contemporaneous records. Without documentation tying costs to real development, the IRS can deny the entire deduction.
- Electing to amortize by accident. Choosing capitalization is hard to reverse, so confirm your election matches your cash-flow goal.
Do’s and Don’ts
Do’s
- Do confirm your gross-receipts average — it decides whether you get the retroactive option, worth real refund dollars.
- Do separate domestic from foreign R&D because each follows a completely different timing rule.
- Do file retroactive claims early so a slow IRS refund does not collide with the July 6, 2026 deadline.
- Do keep detailed cost records since documentation is your defense in an audit.
- Do model the 174A-versus-280C tradeoff because the right pick depends on your specific numbers.
Don’ts
- Don’t assume the rule sunsets — domestic expensing under 174A is permanent, so you can plan long-term.
- Don’t ignore state rules because federal relief does not guarantee state relief.
- Don’t lump in capital equipment since machines depreciate under different rules and do not qualify.
- Don’t file without checking 2024 first because whether you already expensed it changes which years you amend.
- Don’t go it alone on amended returns when a five-figure refund and a hard deadline are on the line.
Pros and Cons of Immediate R&D Expensing
Pros
- Lowers taxable income now, freeing up cash exactly when research-heavy firms need it most.
- Permanent rule under Section 174A, so it supports stable long-term planning.
- Retroactive refunds let qualifying small businesses recover taxes overpaid in 2022–2024.
- Simpler bookkeeping than tracking five-year amortization schedules for every cost.
- Supports innovation by rewarding development spending in real time, not years later.
Cons
- Foreign R&D excluded, forcing a two-track system that complicates global companies.
- Tight retroactive deadline of July 6, 2026 pressures small businesses to act fast.
- 280C coordination adds a layer of math when you also claim the R&D credit.
- State conformity gaps can erase part of the benefit at the state level.
- Election traps make a wrong amortization choice hard to undo.
What to Do Next
- Check your gross receipts. If your three-year average is $31 million or less, you likely qualify for the retroactive refund.
- Pull your 2022–2024 returns. Find the domestic R&D you were forced to amortize.
- Decide your route. Amended returns, an AAR for partnerships, or a Rev. Proc. 2025-28 method change with a true-up.
- Gather records. Wages, supplies, contractor costs, and documentation tying each to real development.
- File before July 6, 2026. Submit retroactive claims early to beat both the deadline and IRS processing time.
- Call a professional when it gets complex. A CPA or tax attorney is worth it for amended returns, the R&D credit, foreign R&D, or state conformity questions.
This article is educational and is not a substitute for advice from a licensed tax professional about your specific situation. When your facts involve multiple years, foreign research, the R&D credit, or a state add-back, get help from a CPA or tax attorney before you file.
Frequently Asked Questions
Can a business deduct R&D costs in the same year now?
Yes. For tax years beginning after December 31, 2024, new Section 174A lets a U.S. business fully deduct its domestic R&D in the year it pays the costs, reversing the 2022–2024 amortization rule from the Tax Cuts and Jobs Act.
What is Section 174A?
Section 174A is the 2025 law that permanently restored immediate expensing of domestic research costs. The One Big Beautiful Bill Act created it for amounts paid or incurred after December 31, 2024, ending forced five-year amortization for U.S. research.
Is the immediate R&D deduction permanent?
Yes. Unlike many 2025-law provisions that sunset after 2028, Section 174A immediate expensing of domestic R&D is permanent, so businesses can rely on it for long-term planning without an expiration date.
Can small businesses get a refund for 2022–2024?
Yes. Small businesses with average annual gross receipts of $31 million or less can apply Section 174A retroactively to 2022–2024 domestic R&D and claim refunds, but they must file by July 6, 2026.
What is the deadline for retroactive R&D claims?
July 6, 2026. Eligible small businesses must file amended returns or an administrative adjustment request by the earlier of July 6, 2026 or the statute of limitations for that year, whichever comes first.
Does this apply to foreign R&D?
No. Research conducted outside the United States must still be capitalized and amortized over 15 years under Section 174. Only domestic research qualifies for immediate expensing under Section 174A.
How much can I deduct?
100% of qualifying domestic R&D. For tax years beginning after December 31, 2024, you can deduct the full amount of eligible U.S. research and experimental costs in the year you pay or incur them.
Does software development qualify?
Yes. Section 174A and IRS guidance treat software development costs as research and experimental expenditures by default, so most software and tech companies can deduct their domestic development spending immediately.
What is the gross receipts limit for the retroactive option?
$31 million. A business qualifies as a small business for the retroactive election if its average annual gross receipts for the prior three years are $31 million or less, measured for the first year beginning after December 31, 2024.
Can I claim both the R&D deduction and the R&D credit?
Yes, but not on the same dollars. Section 280C requires you to either reduce your Section 174A deduction by your research credit or elect to reduce the credit, preventing a double tax benefit.
Will my state let me deduct R&D right away?
It depends on your state. Rolling-conformity states usually follow the federal rule automatically, but static-conformity and decoupled states may still require amortization. Check with your state Department of Revenue before filing.
What form do I use to deduct R&D?
Your regular business return. Sole proprietors use Schedule C, partnerships use Form 1065, S corporations use Form 1120-S, and C corporations use Form 1120. A method change may also require Form 3115.