R&D Tax Credit — Income Tax Credit (Section 41)

R&D Tax Credit — Income Tax Credit (Section 41) — TY2025 / Filed

Supports established United States companies with income tax credits tied to qualified innovation spending.

The Section 41 R&D Tax Credit for established companies provides a non-refundable federal income tax credit equal to 20% of qualified research expenses above the computed base amount. The credit is permanent in the tax code, carries forward up to 20 years if unused, and is claimed on Form 6765 (Credit for Increasing Research Activities) attached to the TY2025 income tax return. Calendar-year filers face a March 15 or April 15, 2026 deadline depending on entity type, with extensions to October 15, 2026. Any company conducting qualified domestic research — technological in nature, experimental in process, aimed at discovering information, and related to a new or improved business component — may claim the credit regardless of size or industry.

The One Big Beautiful Budget Act of 2025 (OBBBA) enacted Section 174A, which changes domestic research-and-experimental-expenditure treatment from elective to mandatory full expensing beginning TY2025. Section 41(d)(1)(A) was simultaneously amended to require that qualified research expenditures be treated as domestic R&E under Section 174A, altering the credit calculation base for all TY2025 filers. Small businesses with average annual gross receipts of $31 million or less may also amend TY2022–2024 returns retroactively under OBBBA provisions. Revenue Procedure 2025-08 governs accounting method changes associated with the Section 174 treatment transition.

The December 2025 revision of Form 6765 introduced Section G, which requires expanded business-component reporting for TY2025 returns. Companies should document their qualified research activities and expenses contemporaneously, following IRS audit technique guides for their sector. Because the credit is non-refundable, it is most valuable to profitable companies with current-year federal income tax liability; unprofitable startups should instead evaluate the QSB payroll offset election under Section 41(h).