R&D Tax Credit Calculator

The federal Research & Development tax credit under IRC Section 41 rewards U.S. businesses for increasing qualified research activities. It reduces your tax liability dollar-for-dollar — not just as a deduction — and unused credit can be carried forward up to 20 years. Startups with no tax liability can apply up to $500,000/year against payroll taxes.

QREs fall into three buckets: (1) Wages paid to employees who perform, supervise, or support qualified research; (2) Supplies consumed in the research process (not capital equipment); and (3) Contract research — 65% of amounts paid to third parties performing qualified research on your behalf. Cloud computing costs used in research may also qualify under recent IRS guidance.

The Regular Credit equals 20% of QREs that exceed a base amount. The base amount is your fixed-base percentage (ratio of QREs to gross receipts from 1984–1988) multiplied by your average gross receipts for the prior 4 years, with a floor of 50% of current-year QREs. Most established businesses use this method when their historical QRE ratio is low.

The ASC equals 14% of QREs that exceed 50% of your average QREs for the prior 3 years. If you have no QREs in those prior years, the credit is 6% of current-year QREs. The ASC is simpler to calculate and is often better for startups or companies without 1984–1988 historical data.

Run both and pick the larger number — that's exactly what this calculator does. The RC tends to win when your base amount (historical QRE ratio) is low relative to current spending. The ASC tends to win when QREs have grown rapidly in recent years. You must make the ASC election on a timely filed return; once elected you generally cannot switch back without IRS consent.

Yes. Under the PATH Act, qualified small businesses (under $5M in gross receipts, in business less than 5 years) can elect to apply up to $500,000 of R&D credit per year against employer payroll taxes (Social Security portion). This is a major benefit for pre-revenue or loss-stage startups that have no income tax liability to offset.

By default, you must reduce your R&D deduction by the full credit amount (which increases taxable income). Alternatively, you can elect the "reduced credit" under Section 280C(c)(2), which lowers the credit rate to roughly 13% (RC) or 12.32% (ASC) but lets you keep the full deduction. The reduced credit election is usually better at the 21% corporate rate — your CPA can model both.

No. This tool gives you a reliable ballpark estimate to understand the opportunity and have an informed conversation with your tax advisor. Claiming the R&D credit requires documenting the four-part test for each project, completing Form 6765, and defending QRE allocations under IRS scrutiny. An experienced R&D tax credit specialist can often find QREs you would miss on your own.