Tax Law
Mar 10, 2026

The One Big Beautiful Bill Act: What Changed for R&D Expensing in 2025

The One Big Beautiful Bill Act: What Changed for R&D Expensing in 2025
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For three years — 2022 through 2024 — businesses that invested in research and development faced a quiet but painful tax increase. A provision buried in the 2017 Tax Cuts and Jobs Act forced companies to capitalize domestic R&D expenses and deduct them over five years instead of immediately. The practical effect was significant: a company spending $500,000 on R&D could only deduct $100,000 per year, inflating its taxable income by $400,000 in year one.

The One Big Beautiful Bill Act, signed July 4, 2025, changed that — permanently.

What Section 174A Does

New Section 174A restores full, immediate expensing for domestic research and experimental expenditures. For tax years beginning after December 31, 2024, businesses can once again deduct 100% of qualifying domestic R&D costs in the year they're incurred. There is no phase-out, no sunset, and no cap.

At the 21% corporate tax rate, the math is straightforward: every $1,000,000 in qualifying domestic R&D spend now generates $210,000 in immediate federal tax savings rather than $42,000 per year spread over five years. The cash flow difference is real and immediate.

What Qualifies as Domestic R&D

Section 174A applies to domestic expenditures — research conducted within the United States. Foreign research activity is treated differently and is still subject to amortization over 15 years. For most U.S.-based businesses, the bulk of their R&D activity will qualify for the full immediate deduction.

Qualifying expenditures broadly include wages paid to employees conducting research, contractor costs for domestic research activity, and materials consumed in the research process.

This Is Separate from the R&D Tax Credit

It's important to understand that the Section 174A deduction and the Section 41 R&D Tax Credit are two distinct benefits that can be claimed together. The deduction reduces your taxable income. The credit reduces your tax liability directly. Maximizing both — with proper coordination — delivers the greatest combined benefit.

What to Do Now

If your business incurs domestic R&D expenses, your 2025 tax return should reflect the full immediate deduction under 174A. If your advisors haven't already flagged this as part of your tax planning, now is the time to revisit your strategy. The law is permanent, the benefit is real, and leaving it on the table isn't a small oversight.