OBBBA Enacted: Permanent R&D Expensing and Enhanced Tax Credits — Your 2026 Action Plan

Published 2026-06-16

Quick Answer

The One Big Beautiful Bill Act (OBBBA) has fundamentally transformed the R&D tax landscape by restoring permanent immediate expensing for domestic research under Section 174, tripling the startup payroll tax offset cap to $1.5 million, and enhancing the Alternative Simplified Credit rate for small businesses. For companies that have been forced to amortize R&D costs over five years since 2022, this is the most significant tax reform in a decade — and there are immediate actions you should take for both current-year planning and amended returns.

Key Takeaways

• Permanent Section 174 expensing is back: Domestic R&D costs can once again be fully deducted in the year incurred — no more 5-year amortization for U.S.-based research.
• Startup payroll tax offset tripled: Qualifying startups can now offset up to $1.5 million in payroll taxes (up from $500,000) using R&D credits over a 5-year period.
• Enhanced ASC rate for small businesses: Companies with under $5 million in gross receipts gain access to a more generous Alternative Simplified Credit rate.
• Amended return window is open: Tax years 2022–2024 may be eligible for amended returns to retroactively claim immediate expensing.
• Foreign research is NOT included: Offshore R&D expenses remain subject to 15-year amortization, creating a strong onshore incentive.
• Section 280C election deadline is July 6, 2026 for certain filers — the analysis of credit-vs-deduction has fundamentally changed under the new law.

What OBBBA Changed for R&D: An Overview

The One Big Beautiful Bill Act represents the most consequential R&D tax reform since the Tax Cuts and Jobs Act (TCJA) of 2017. As we covered in our original OBBBA proposal analysis, the bill addressed several provisions that had been slowly eroding the competitiveness of U.S.-based innovation.

The TCJA introduced a time bomb for R&D-intensive businesses: starting in tax year 2022, Section 174 required all research expenditures to be amortized — 5 years for domestic research and 15 years for foreign research — instead of being immediately deductible. This change caught many businesses off guard and effectively increased the cost of investing in innovation on American soil.

The OBBBA reverses the most damaging parts of that change. Here’s what the enacted law delivers:

1. Permanent full expensing for domestic qualified research expenditures under Section 174
2. Enhanced Alternative Simplified Credit (ASC) rate for qualifying small businesses
3. Triple the startup payroll tax offset (from $500,000 to $1.5 million)
4. Amended return opportunities for tax years 2022 through 2024
5. State-level R&D credit reforms, including a major Iowa overhaul

What the law does not do is change the foreign research amortization rules, the fundamental Section 41 four-part test, or the requirement to file Form 6765 to claim the credit.

Section 174: Permanent Full Expensing Restored

The crown jewel of the OBBBA for R&D-intensive businesses is the permanent restoration of immediate expensing under Section 174.

What Changed

From 2022 through 2024, businesses were required to amortize domestic research costs over 5 years (and foreign costs over 15 years). This meant that a company spending $1 million on R&D in 2023 could only deduct $100,000 in year one, with the remainder spread over the following four years. For cash-flow-sensitive startups and mid-sized companies, this was devastating.

Under the OBBBA, domestic qualified research expenditures can once again be fully and immediately deducted in the year they are incurred. This applies to tax years beginning after December 31, 2024 — meaning tax year 2025 is the first year of the new regime.

Why “Permanent” Matters

Previous tax extenders for R&D were temporary measures that required periodic Congressional renewal. Businesses could never fully plan around them because they might disappear. The OBBBA made the Section 174 expensing provision permanent — there is no sunset clause, no expiration date, and no need for future Congressional action to maintain it.

This permanence is critical for long-term planning. If you’re deciding whether to build an R&D center in the U.S. or offshore, you can now confidently model the tax implications of domestic expensing indefinitely into the future.

What Qualifies as Domestic Research

To qualify for immediate expensing under the new Section 174, research must meet two key tests:

1. It must qualify as a Section 174 research or experimental expenditure — meaning it involves activities intended to discover information that eliminates uncertainty about the development or improvement of a product or process.
2. It must be conducted in the United States — foreign research remains subject to 15-year amortization.

For a deeper dive into qualifying activities, review our Section 174 expensing guide.

Enhanced ASC Rate for Small Businesses

The OBBBA didn’t just restore expensing — it also improved the R&D credit itself for certain small businesses through an enhanced Alternative Simplified Credit (ASC) rate.

Who Qualifies

To qualify for the enhanced ASC rate, a business must have:

• Gross receipts under $5 million for the current tax year
• No gross receipts before the 5-tax-year period ending with the prior tax year (i.e., relatively new companies)

This definition targets early-stage companies that are investing heavily in R&D relative to their revenue.

How the Enhanced Rate Works

Under the standard ASC method, the R&D credit equals 14% of qualified research expenses that exceed 50% of the average qualified expenses for the prior three years. For qualifying small businesses under the OBBBA, the enhanced rate provides a more generous calculation.

The practical impact is significant. A startup spending $2 million annually on R&D with minimal prior-year baseline expenses could see a substantially larger credit under the enhanced rate compared to the standard ASC. This translates directly into tax savings or, for startups without tax liability, a larger payroll tax offset.

ASC vs. Regular Credit: Which to Choose?

Even with the enhanced ASC rate, businesses should evaluate both credit methods. The Regular Credit method (based on a fixed-base percentage) may still produce better results for companies with a long history of R&D spending. Our Alternative Simplified Credit guide walks through the comparison in detail.

Startup Payroll Tax Offset: Tripled to $1.5M

One of the most impactful changes in the OBBBA for early-stage companies is the tripling of the payroll tax offset cap.

The Old Rule (Pre-OBBBA)

Under prior law, qualifying small businesses could elect to apply up to $500,000 of their R&D credit against the employer portion of FICA payroll taxes (Social Security at 6.2% and Medicare at 1.45%). This was valuable for startups that had significant R&D credits but little or no income tax liability.

The New Rule (OBBBA)

The OBBBA increased the lifetime cap to $1,500,000, available over a maximum of 5 years. This tripled the potential benefit for qualifying startups.

To qualify, a business must:

1. Be fewer than 5 years old
2. Have gross receipts under $5 million for the current year
3. File Form 6765 and make the payroll tax offset election

Practical Impact

Consider a biotech startup with 30 employees and a $400,000 R&D credit annually. Under the old $500,000 cap, they could only use the offset for about 15 months before exhausting the lifetime limit. With the new $1.5 million cap, that same startup can offset payroll taxes for the full 5-year period — freeing up significant cash flow during the critical early growth stage.

This change is retroactive to tax years beginning after December 31, 2024, so startups can start benefiting immediately.

Section 280C Election Under the New Law

The OBBBA’s restoration of immediate expensing fundamentally changes the calculus of the Section 280C election — and the deadline to make this election for certain filers is July 6, 2026.

What Is the Section 280C Election?

Section 280C prevents double-dipping: if you claim the R&D tax credit, you must either (a) reduce your deductible R&D expenses by the amount of the credit, or (b) elect to reduce the credit itself by 23% (the corporate tax rate). This election is made on a year-by-year basis.

Why the New Law Changes Everything

Under the old amortization regime, the Section 280C election was often a close call. Reducing your deductible expenses mattered less because those expenses were already being spread over 5 years anyway.

Under permanent immediate expensing, the choice becomes much more consequential:

• If you take the full credit: You reduce your Section 174 deduction by the credit amount, but you still get to immediately expense the remainder.
• If you elect reduced credit: You keep your full deduction but accept a 23% smaller credit.

The optimal choice depends on your tax rate, the size of your R&D spending, and whether you can use the credit immediately or need to carry it forward. Our carryforward rules guide explains what happens to unused credits.

The July 6, 2026 Deadline

For calendar-year C-corporations filing on extension, the Section 280C election deadline falls on October 15, 2026. However, certain fiscal-year filers and pass-through entities face a July 6, 2026 deadline. You cannot file an extension for the election itself — it must be made by the return filing deadline.

This means businesses need to analyze their credit-vs-deduction strategy well before their filing deadline. Waiting until the last minute could result in a suboptimal election that leaves real money on the table.

Amended Return Opportunities (2022–2025)

One of the most immediate action items under the OBBBA is the opportunity to file amended returns for tax years where you were forced to amortize Section 174 expenses.

Which Tax Years Are Eligible

The amended return window applies to:

• Tax year 2022: Returns filed in 2023 — the statute of limitations expires 3 years after filing, so you may be running out of time
• Tax year 2023: Returns filed in 2024 — generally still within the amendment window
• Tax year 2024: Returns filed in 2025 — well within the amendment window
• Tax year 2025: Current year — file under the new rules directly

What You Can Claim on Amended Returns

By amending, you can:

1. Immediately expense the R&D costs that were previously being amortized over 5 years
2. Claim or increase your R&D tax credit if you hadn’t already maximized it
3. Reduce your taxable income for the amended year, potentially generating a refund

Urgency for Tax Year 2022

If you filed your 2022 tax return on extension (October 15, 2023), your 3-year statute of limitations runs out on October 15, 2026. If you filed on the standard deadline (April 15, 2023), the deadline has already passed for most filers.

This is time-critical. Consult your tax advisor immediately if you have unclaimed R&D benefits from 2022.

Documentation Requirements

Amended returns require the same level of R&D documentation as original filings. Ensure you have:

• Contemporaneous documentation of qualified research activities
• Payroll records for employees engaged in R&D
• Supply and contractor invoices related to research
• Project descriptions demonstrating the four-part test

State R&D Credit Changes (Iowa, California, and More)

The OBBBA’s federal changes are also rippling through state-level R&D credit programs.

Iowa: Complete Overhaul for 2026+

Iowa enacted the most significant state-level R&D credit reform alongside the OBBBA. Key changes for tax years 2026 and beyond include:

• Refundable credit expansion: A larger portion of the Iowa R&D credit is now refundable, meaning companies can receive cash even if they have no state tax liability
• Simplified application process: The Iowa Department of Revenue has streamlined the credit certification process
• New ASC alignment: Iowa’s credit calculation now more closely mirrors the federal Alternative Simplified Credit method

If you operate in Iowa or have Iowa-based R&D activities, review your state credit strategy in light of these changes.

California and Other States

Several other states are evaluating changes to their R&D credit programs in response to the OBBBA. California, which has historically had one of the most generous state R&D credits (24% of qualifying expenses for C-corporations), is considering adjustments to its qualification criteria.

For a comprehensive state-by-state breakdown, see our state R&D credits guide.

Foreign Research: Still 15-Year Amortization

The OBBBA drew a clear line between domestic and foreign research — and that line matters enormously for multinational companies.

The Current Rule for Foreign Research

While domestic R&D expenses can now be immediately expensed, foreign research expenses remain subject to 15-year amortization under Section 174. This means offshore R&D costs must be spread over 15 years, starting with 10% in year one and 6.67% in each subsequent year.

The Policy Rationale

This deliberate split reflects a Congressional intent to incentivize onshore R&D investment. By making domestic research immediately deductible while keeping foreign research on a slow amortization schedule, the OBBBA effectively increases the after-tax cost of offshore innovation.

Strategic Implications

For companies with a choice between U.S. and foreign R&D operations, the tax differential is now stark:

• Domestic R&D: Full deduction in year one + potential R&D tax credit = effective government subsidy of innovation
• Foreign R&D: 15-year amortization + no R&D tax credit eligibility = significantly higher after-tax cost

This doesn’t mean companies should immediately relocate all foreign R&D — there are legitimate business reasons for offshore operations (market proximity, specialized talent, regulatory requirements). But the tax math now heavily favors keeping innovation on American soil where possible.

Before OBBBA vs. After OBBBA: Side-by-Side Comparison

The full impact of the OBBBA becomes clear when you compare the old and new regimes directly:

Step-by-Step Action Plan

Now that the OBBBA is enacted, here’s exactly what you should do — in order:

1. Review Your Tax Year 2025 Filing Position

Tax year 2025 is the first year under the new regime. Ensure your tax team or preparer is treating domestic R&D expenses as immediately deductible under Section 174. If anyone is still following the old amortization rules, correct this immediately.

2. Evaluate the Section 280C Election

Work with your tax advisor to determine whether the reduced credit election or the reduced deduction election produces better results under immediate expensing. This analysis is different from prior years and could significantly impact your tax liability. Mark the July 6, 2026 or October 15, 2026 deadline on your calendar now.

3. Assess Amended Return Opportunities for 2022–2024

Pull your prior-year tax returns and identify where R&D costs were amortized rather than expensed. Calculate the potential benefit of amending. Prioritize tax year 2022 — the statute of limitations may expire soon depending on your original filing date.

4. Determine Your Eligibility for Enhanced Small Business Benefits

If your gross receipts are under $5 million, you may qualify for the enhanced ASC rate. If you’re a startup under 5 years old, you may qualify for the $1.5 million payroll tax offset. Don’t leave these benefits on the table.

5. Update Your R&D Documentation

Proper documentation is essential regardless of the expensing method. Ensure your documentation checklist is current and that you’re tracking:

• Qualified research activities by project
• Employee time allocations for R&D work
• Supplies and contractor costs
• Evidence of the four-part test (Section 41)

6. File Form 6765 Correctly

The OBBBA didn’t change the Form 6765 filing requirement. You must still file this form to claim the R&D credit, report qualified research expenses, and make any relevant elections.

7. Review State R&D Credit Strategy

With states like Iowa reforming their programs, review where you have R&D activities and whether state-level credits have changed. Coordinate your federal and state credit strategies for maximum benefit.

8. Reassess Offshore R&D Plans

If you have flexibility in where to locate R&D activities, the OBBBA’s domestic-vs-foreign split should factor heavily into your decision. The after-tax cost differential between U.S. and foreign R&D has never been larger.

9. Calculate Your Potential Credit

Use our R&D tax credit calculator to estimate your potential benefit under the new law:

👉 Calculate Your R&D Tax Credit

Frequently Asked Questions

When did the One Big Beautiful Bill Act become law and when do R&D changes take effect?

The OBBBA was signed into law in 2025 with most R&D provisions effective for tax years beginning after December 31, 2024. This means tax year 2025 is the first year businesses can immediately expense domestic R&D costs again under Section 174. The provisions are permanent, so there is no need to worry about future expiration.

Is the Section 174 immediate expensing permanent under OBBBA?

Yes. Unlike temporary tax extenders that Congress had to renew every year or two, the OBBBA made permanent full expensing for domestic qualified research expenditures under Section 174. There is no expiration date or sunset clause for this provision. Businesses can confidently build long-term R&D investment plans knowing the tax treatment is stable.

How much did the startup R&D payroll tax offset increase under OBBBA?

The OBBBA tripled the lifetime cap from $500,000 to $1,500,000 for qualifying startups (under 5 years old with less than $5 million in gross receipts). This means eligible companies can offset up to $1.5 million in payroll taxes using R&D credits over a 5-year period. For a startup with 20–40 employees, this can represent the difference between surviving and thriving during the critical early growth stage.

Can I amend prior year tax returns to claim immediate R&D expensing retroactively?

Yes, for tax years 2022 through 2024 where you were required to amortize Section 174 expenses, you can file amended returns to claim immediate expensing if the statute of limitations hasn’t expired. The typical deadline is 3 years from the original filing date. For tax year 2022 returns filed on April 15, 2023, the deadline is April 15, 2026 — act quickly. Returns filed on extension (October 15, 2023) have until October 15, 2026.

Does OBBBA change the foreign R&D amortization rules?

No. The OBBBA only restored immediate expensing for domestic (U.S.-based) research. Foreign research expenses are still subject to 15-year amortization under Section 174. This creates a strong incentive to keep R&D activities onshore, as the after-tax cost of foreign research is now significantly higher than domestic research. Companies should carefully model the tax implications when deciding where to locate R&D operations.

What is the enhanced ASC rate for small businesses under OBBBA?

Qualifying small businesses with less than $5 million in gross receipts can claim an enhanced Alternative Simplified Credit rate. The OBBBA increased this rate to provide greater benefit to early-stage companies investing heavily in innovation. This enhanced rate can produce a meaningfully larger credit than the standard 14% ASC rate, especially for companies with minimal prior-year R&D baselines.

Do I still need to file Form 6765 to claim the R&D tax credit under OBBBA?

Yes. The OBBBA did not eliminate Form 6765 or change the fundamental credit claiming process. You must still file Form 6765 with your tax return, document qualified research expenses, and meet the four-part test under Section 41. The four-part test requires that activities involve a new or improved business component, rely on hard sciences, involve a process of experimentation, and are intended to eliminate technical uncertainty.

How does OBBBA affect the Section 280C reduced credit election deadline?

The Section 280C election must be made by the extended tax return filing deadline. For calendar-year C-corporations, this means October 15, 2026. For certain fiscal-year filers and pass-through entities, the deadline may be as early as July 6, 2026. Businesses should evaluate whether the reduced credit election or reduced deduction is more advantageous under the new immediate expensing regime — the analysis has fundamentally changed from prior years.

Ready to see how much you can claim under the new law? Use our R&D Tax Credit Calculator to estimate your enhanced credit and payroll tax offset potential in minutes.

Disclaimer: This article is for informational purposes only and does not constitute tax, legal, or accounting advice. The R&D tax credit rules are complex and fact-specific. Always consult with a qualified tax professional regarding your specific situation before making tax decisions. While we strive for accuracy, tax laws change frequently and this content may not reflect the most current developments.