Federal R&D Tax Credit (Section 41)

About this programme

The federal Research & Development tax credit, codified at Internal Revenue Code Section 41, is a general business tax credit for companies that spend money increasing their research activities in the United States. It is administered by the Internal Revenue Service and claimed on a business's federal income tax return using Form 6765, Credit for Increasing Research Activities — it is not a grant, and no separate application is filed anywhere outside the tax return.

The credit rewards a company for research it is already doing, not for a proposed project. A business identifies its "qualified research expenses" (QREs) — in-house wages, supplies, and a share of contract research costs tied to qualifying activities — and calculates the credit using either the regular credit method or the Alternative Simplified Credit (ASC) method under Form 6765.

Because the credit is filed as part of the tax return rather than awarded competitively, there is no funding pool, no annual round, and no ceiling on the number of businesses that can claim it in a given year — eligibility turns entirely on whether the company's activities and expenses meet the statutory four-part test and expense definitions.

A qualified small business with little or no income tax liability (for example, a pre-revenue or early-revenue startup) can instead elect to apply up to $500,000 of the credit against its payroll tax liability, using Form 8974 alongside Form 6765 — this is the route most early-stage companies with US R&D actually use.

How it works

To qualify, research expenditures must pass a four-part test, applied separately to each "business component" (a product, process, software, technique, formula, or invention): (1) the expenditure must be treated as a domestic research or experimental expenditure under section 174A (the provision that replaced section 174 for domestic R&E costs for tax years beginning after 31 December 2024); (2) the research must be undertaken to discover information that is technological in nature; (3) the taxpayer must intend to apply the information to develop a new or improved business component; and (4) substantially all of the activities must constitute a process of experimentation relating to function, performance, reliability, or quality.

Qualified research expenses fall into four categories on Form 6765: in-house wages for employees performing, directly supervising, or directly supporting qualified research; supplies consumed in the research; the cost of renting or leasing computers used off-premises for the research; and contract research payments to a third party performing qualified research on the taxpayer's behalf — contract research is only partially includible, at 100%, 75%, or 65% of the payment depending on who performed the work.

The credit can be calculated under the regular method or the Alternative Simplified Credit (ASC) method; the ASC method is generally simpler because it bases the credit on a rolling average of the taxpayer's own prior three years' QREs rather than a fixed historical base period.

A taxpayer may instead elect the ASC 730 method, which lets certain taxpayers use the R&D costs already expensed on their financial statements under Accounting Standards Codification 730 as the basis for the QRE calculation.

Taxpayers can elect a reduced credit under Section 280C by checking the relevant box on a timely-filed original return; this avoids having to reduce the company's research expense deduction by the credit amount, but the election is irrevocable for that year and Form 6765 must still be filed even when no credit is being claimed.

A qualified small business — generally gross receipts under $5 million for the current year and no gross receipts for any year before the five-year period ending with the current year — can elect on Form 6765 to apply up to $500,000 of the credit (for tax years beginning after December 31, 2022; the cap was $250,000 for earlier years) against the employer portion of Social Security payroll tax, using Form 8974 attached to the employment tax return.

For tax years beginning after 2025, Form 6765's Section G requires reporting QREs by business component: taxpayers must report business components covering at least 80% of total QREs, in descending order of QRE amount, capped at 50 components. Two exemptions apply on an originally filed return: qualified small businesses electing the payroll tax offset, and filers whose total QREs are $1.5 million or less AND whose average annual gross receipts are $50 million or less (both measured at the controlled-group level).

Who can apply

Any US business — corporation, partnership, S corporation, estate, or trust — that incurs qualified research expenses on activities meeting the four-part test can claim the credit; there is no industry restriction and no minimum company size, though the activities and expenses must be substantiated.

To use the payroll tax offset instead of an income tax credit, a business must qualify as a "qualified small business": gross receipts under $5 million for the credit year, and no gross receipts for any year preceding the five-year period ending with the credit year — this route is aimed at startups and early-stage companies that owe little or no federal income tax.

How to apply

1. Identify and document the qualified research activities and business components for the tax year, and calculate the qualified research expenses (wages, supplies, contract research, and applicable computer rental costs) attributable to each.
2. Complete Form 6765, Credit for Increasing Research Activities, choosing either the regular credit method or the Alternative Simplified Credit (ASC) method, and, if applicable, making the Section 280C reduced-credit election and/or the qualified small business payroll tax credit election.
3. File Form 6765 with the business's timely-filed original federal income tax return for the year (the payroll tax election in particular must be made on a timely-filed original return, not an amended one).
4. If electing the payroll tax offset, take the elected credit amount from Form 6765 and report it on Form 8974, Qualified Small Business Payroll Tax Credit for Increasing Research Activities, which is then attached to the business's employment tax return (Form 941 or annual equivalent) to actually apply the credit against payroll tax liability.
5. If instead claiming the credit as a refund on an amended return, include the information required for a valid Section 41 refund claim: identification of all business components the claim relates to, a description of the research activities performed for each, and the total qualified employee wage expenses, supply expenses, and contract research expenses for the claim year (which may be provided via Form 6765). The IRS allows 45 days to perfect a deficient refund claim before making a final determination, under a transition period running through January 10, 2027.

Documents you’ll typically need

• Form 6765, Credit for Increasing Research Activities
• Form 8974, Qualified Small Business Payroll Tax Credit for Increasing Research Activities (only if electing the payroll tax offset)
• Records substantiating qualified research activities and expenses by business component (project/technical documentation, payroll records for research employees, supply invoices, contract research agreements and invoices)
• For amended-return refund claims: a written statement identifying all business components the claim relates to, the research activities performed, and total qualified wage, supply, and contract research expenses for the claim year

Frequently asked

Reviewed 2026-08-16. Programmes change — confirm current eligibility, amounts and deadlines on the official page before you apply. CapEasy is a private consultancy and is not affiliated with any government authority.