For three years, businesses have been forced to amortize R&D expenses over 5 years instead of deducting them immediately. A 2017 provision in the TCJA — one that almost nobody noticed at the time — kicked in for tax years beginning after December 31, 2021, and turned a straightforward deduction into a cash flow nightmare.
The One Big Beautiful Bill Act reversed it. Domestic research and experimental expenditures incurred after December 31, 2024 are immediately deductible again. And if you've been amortizing R&D costs since 2022, you may be able to catch up on deductions you've been deferring.
What Happened in 2022 (And Why It Hurt)
Under Section 174 of the tax code, businesses have historically deducted R&D expenses in the year they were incurred — just like any other ordinary business expense. The TCJA changed that, effective 2022, requiring businesses to capitalize and amortize R&D expenses over 5 years (domestic) or 15 years (foreign).
The impact was immediate and severe. A software company spending $500,000/year on developer salaries for R&D could only deduct $100,000 in year one instead of the full amount. The remaining $400,000 was spread over the next four years. For cash-basis taxpayers, this meant paying tax on income they'd already spent.
This wasn't just a problem for tech companies. Construction firms doing process development, restaurants testing new menu concepts, manufacturers improving production methods, and any business engaged in qualifying R&D activities felt the pain of deferred deductions.
What the OBBBA Fix Does
The One Big Beautiful Bill Act restores immediate expensing with three key provisions:
- Immediate deduction restored: Domestic R&D expenses incurred after December 31, 2024 are fully deductible in the year incurred. No more 5-year amortization.
- Catch-up deductions: Unamortized amounts from prior years (2022–2024 R&D that's still being amortized) can be deducted — either entirely in 2025 or split between 2025 and 2026.
- Small taxpayer amended returns: Small taxpayers can amend prior-year returns (2022, 2023, 2024) to claim the immediate deduction they would have taken if the amortization requirement had never existed.
Foreign R&D still amortized. The restoration applies to domestic R&D only. Research and experimental expenditures attributed to foreign activities are still amortized over 15 years. If your R&D involves offshore teams or foreign research facilities, the allocation between domestic and foreign matters significantly.
The Catch-Up Opportunity: Recovering Deferred Deductions
If you've been amortizing R&D expenses since 2022, you likely have significant unamortized balances sitting on your books. The OBBBA lets you accelerate those remaining amounts into 2025 (or split them between 2025 and 2026).
Here's what that looks like in practice:
A construction company spent $200,000 on qualifying R&D in 2022. Under the amortization requirement, they deducted $40,000/year. By the end of 2024, they've deducted $120,000 — leaving $80,000 still unamortized.
Under the OBBBA, that $80,000 can be deducted in 2025. Add in similar unamortized balances from 2023 and 2024 R&D, and the catch-up deduction could be substantial — potentially six figures for businesses with consistent R&D spending.
If you've been amortizing R&D since 2022, you may have a significant catch-up deduction available. We'll calculate your unamortized balances and determine whether to take it all in 2025 or split between years for optimal tax benefit.
Book a Free Review →Who This Affects (It's Not Just Tech Companies)
The term "research and development" conjures images of lab coats and Silicon Valley. But the IRS definition of qualifying R&D expenses under Section 174 is much broader than most business owners realize:
- Construction companies: Developing new building methods, engineering solutions for unusual projects, testing new materials or techniques. See our construction R&D guide.
- Restaurants and food businesses: Menu development, recipe testing, food science experimentation, process improvement for food safety. See our restaurant R&D guide.
- Manufacturers: Process improvement, product development, tooling design, quality control systems
- Software and tech: Development salaries, cloud computing costs for development, contractor costs for coding and testing
- Engineering and architecture firms: Design development, structural analysis, prototype testing
If your business spends money on activities that involve uncertainty, experimentation, and technical problem-solving, some of those costs likely qualify as Section 174 expenses.
Amending Prior Returns: The Small Taxpayer Option
The OBBBA gives small taxpayers the ability to amend 2022, 2023, and 2024 returns to claim immediate deductions they were previously forced to amortize. This is a powerful provision — but it requires careful analysis.
Filing amended returns triggers a fresh look at those tax years. If your R&D expenses were borderline or your documentation was thin, amending could invite scrutiny you'd rather avoid. On the other hand, if you have well-documented R&D expenses and the deductions are substantial, the refund potential is significant.
The decision to amend should factor in:
- The dollar amount of deferred deductions in each year
- Your marginal tax rate in each year (higher rate = more valuable refund)
- The strength of your R&D documentation
- Whether the amended returns would trigger other issues (e.g., changing your income could affect other credits or deductions)
- The statute of limitations — you generally have 3 years from the original filing date to amend
R&D Expensing + R&D Tax Credit: Two Different Things
Don't confuse Section 174 (immediate expensing of R&D costs) with the Section 41 R&D tax credit. They're separate provisions that can work together:
| Provision | Section 174 (Expensing) | Section 41 (Credit) |
|---|---|---|
| Type | Deduction | Tax credit |
| Benefit | Reduces taxable income | Dollar-for-dollar tax reduction |
| Qualifying activities | Broader definition | Narrower 4-part test |
| Can use both? | Yes — but must reduce 174 deduction by credit amount (or elect reduced credit) | |
The optimal approach is to claim both: deduct your R&D expenses immediately under Section 174, and claim the R&D tax credit on the subset of expenses that meet the Section 41 four-part test. The interaction between these provisions is nuanced — your deduction is reduced by the credit amount unless you elect the reduced credit method — so the sequencing matters.
What to Do Now
If you're a business owner with R&D expenses — even if you've never thought of your work as "research" — here's your action plan:
- Review 2022–2024 returns for unamortized R&D balances. Calculate the catch-up deduction available in 2025.
- Evaluate amended returns. If you're a small taxpayer, determine whether amending 2022–2024 produces meaningful refunds.
- Identify qualifying activities. Many businesses undercount their R&D. If you're solving technical problems, testing solutions, or developing new processes, you may have more qualifying expenses than you think.
- Coordinate with the R&D tax credit. Don't just expense — make sure you're also claiming the Section 41 credit on qualifying activities.
The amortization requirement was one of the most punishing provisions in the TCJA for R&D-intensive businesses. Its reversal under the OBBBA — plus the ability to catch up on deferred deductions — is a significant cash flow opportunity. But only if you act on it before the filing deadlines for amended returns pass.