What is the R&D tax credit?

The R&D tax credit (Section 41) is a federal tax incentive that rewards companies for investing in research and development activities in the US. Startups can claim up to $500,000 per year against payroll taxes, even if they have no income tax liability.

How much is the R&D tax credit worth?

Using the Alternative Simplified Credit method, the credit is approximately 14% of qualifying research expenses (QREs) that exceed 50% of the average QREs for the prior 3 years. Pre-revenue startups can apply up to $500,000/year against payroll taxes.

What qualifies as R&D for the tax credit?

Qualifying activities include developing new products or software, improving existing products, building prototypes, and developing new processes. The work must involve technological uncertainty and a process of experimentation. Most software development qualifies.

Can a pre-revenue startup actually use the R&D tax credit?

Yes. Qualified small businesses (less than $5M in gross receipts and no gross receipts more than 5 years ago) can elect to apply up to $500,000 of federal R&D credit against payroll taxes, specifically the employer portion of FICA. This means cash savings even with zero income tax liability. The 2022 Inflation Reduction Act doubled the cap from $250K.

How did Section 174 capitalization change R&D for startups?

Starting in tax year 2022, companies must capitalize and amortize R&D expenses (5 years for US R&D, 15 years for foreign) rather than deducting them immediately. This created surprise tax bills for many startups. The R&D credit itself was not affected, but it became more valuable as a way to offset the larger taxable income created by capitalization.

What documentation do I need to claim the R&D tax credit?

You need contemporaneous documentation: project descriptions, time tracking by employee and project, payroll records, contractor invoices, and supply purchase records. The IRS requires Form 6765 with the return, plus the IRS's 5-item disclosure (employees, expenses, business components, activities, intent). StartupCFO handles the study and filing as part of our tax service.

Can I claim R&D credits for prior years?

Yes. You can amend prior-year returns to claim missed R&D credits going back 3 years (the federal statute of limitations). For startups that just learned about the payroll tax election, this can unlock hundreds of thousands in retroactive cash savings. Some states allow amendments going back 4 years.

Is this estimator the same as an R&D tax credit study?

No. The estimator applies the Alternative Simplified Credit formula to your inputs to produce a planning estimate. An actual claim requires a study that documents qualified research expenses project by project, ties them to the four-part test, and supports the amounts reported on Form 6765. Use the estimate to decide whether a study is worth pursuing, then involve a CPA to prepare and file the claim.

Free Tool

R&D Tax Credit Estimator

Estimate your federal R&D tax credit in seconds. Built for software startups using the Alternative Simplified Credit method.

Current year QREs

W-2 Engineer Wages (annual $)

Contractor R&D Costs (annual $)

Cloud/Hosting Costs (annual $)

R&D Supplies (annual $)

Prior-year history

Avg QRE — prior 3 years ($)

First-time filers use a 6% rate on full QRE. Otherwise the credit is 14% of QRE above 50% of this 3-year average.

Current-year gross receipts ($)

QSB payroll offset requires under $5M in current-year gross receipts.

We had gross receipts in any year more than 5 tax years ago

Companies with older revenue history don't qualify for the payroll-tax offset, even if current receipts are below $5M.

How This Calculator Works

The credit behind the numbers

The federal research credit (IRC Section 41) rewards companies for developing new or improved products, processes, or software in the US. An activity qualifies if it passes a four-part test: it aims to create a new or improved business component, faces genuine technical uncertainty at the outset, works through that uncertainty with a process of experimentation (prototyping, testing, systematic trial and error), and relies on hard sciences such as engineering or computer science. Most non-routine software development clears the test, and both successful and failed efforts can qualify. Routine maintenance, bug fixes, and cosmetic changes do not.

Why pre-revenue startups still benefit

A qualified small business, one with under $5M in gross receipts for the credit year and no gross receipts more than 5 years back (roughly, within 5 years of first revenue), can elect to apply up to $500,000 per year of the credit against the employer portion of payroll taxes. That turns the credit into quarterly cash savings even with zero income tax liability. The claim goes on Form 6765 with your annual return, then flows to payroll via Form 8974.

What the estimator does, and when to involve a CPA

This tool applies the Alternative Simplified Credit formula to the numbers you enter: roughly 14% of qualified research expenses above 50% of your prior 3-year average, with a reduced-rate startup method for first-time filers. It produces a planning estimate, not a filing position. An actual claim requires a study that documents QREs project by project: time tracking, payroll records, contractor invoices, and evidence tying each activity to the four-part test. Involve a CPA before you file, both to substantiate the claim and to avoid common disqualifiers like funded client work or inflated wage allocations. Start with our R&D tax credits guide or see how our startup tax service handles the study and filing.

Frequently Asked Questions

What is the R&D tax credit?: The R&D tax credit (Section 41) is a federal tax incentive that rewards companies for investing in research and development activities in the US. Startups can claim up to $500,000 per year against payroll taxes, even if they have no income tax liability.
How much is the R&D tax credit worth?: Using the Alternative Simplified Credit method, the credit is approximately 14% of qualifying research expenses (QREs) that exceed 50% of the average QREs for the prior 3 years. Pre-revenue startups can apply up to $500,000/year against payroll taxes.
What qualifies as R&D for the tax credit?: Qualifying activities include developing new products or software, improving existing products, building prototypes, and developing new processes. The work must involve technological uncertainty and a process of experimentation. Most software development qualifies.
Can a pre-revenue startup actually use the R&D tax credit?: Yes. Qualified small businesses (less than $5M in gross receipts and no gross receipts more than 5 years ago) can elect to apply up to $500,000 of federal R&D credit against payroll taxes, specifically the employer portion of FICA. This means cash savings even with zero income tax liability. The 2022 Inflation Reduction Act doubled the cap from $250K.
How did Section 174 capitalization change R&D for startups?: Starting in tax year 2022, companies must capitalize and amortize R&D expenses (5 years for US R&D, 15 years for foreign) rather than deducting them immediately. This created surprise tax bills for many startups. The R&D credit itself was not affected, but it became more valuable as a way to offset the larger taxable income created by capitalization.
What documentation do I need to claim the R&D tax credit?: You need contemporaneous documentation: project descriptions, time tracking by employee and project, payroll records, contractor invoices, and supply purchase records. The IRS requires Form 6765 with the return, plus the IRS's 5-item disclosure (employees, expenses, business components, activities, intent). StartupCFO handles the study and filing as part of our tax service.
Can I claim R&D credits for prior years?: Yes. You can amend prior-year returns to claim missed R&D credits going back 3 years (the federal statute of limitations). For startups that just learned about the payroll tax election, this can unlock hundreds of thousands in retroactive cash savings. Some states allow amendments going back 4 years.
Is this estimator the same as an R&D tax credit study?: No. The estimator applies the Alternative Simplified Credit formula to your inputs to produce a planning estimate. An actual claim requires a study that documents qualified research expenses project by project, ties them to the four-part test, and supports the amounts reported on Form 6765. Use the estimate to decide whether a study is worth pursuing, then involve a CPA to prepare and file the claim.

Email me this R&D credit estimate

Your estimate plus the documentation a claim actually needs, and the payroll-offset election deadline for your entity.

The tool stays free and open either way. No spam, unsubscribe anytime.

Estimates only. This tool is for planning and is not tax or legal advice. Your actual position depends on facts this calculator does not see, so confirm the numbers with a qualified CPA or attorney before you file.

Keep learning

Guide

R&D Tax Credits for Startups

Discover how your startup can claim R&D tax credits to offset payroll taxes or reduce income tax liability by up to $500K per year.

Insight

The Delaware C-Corp Startup Tax Guide: Every Filing You Owe

Every tax and filing a venture-backed Delaware C-corp owes: Delaware franchise tax, Form 1120, quarterly estimates, state registrations, payroll and 1099 filings, sales tax, and the credits and elections that save real money.

Glossary

R&D Tax Credit

Federal credit for qualified research expenses, usable against payroll tax by startups.

Guide

Seed-Stage Tax Return Guide

Why pre-revenue startups must still file tax returns, the key forms involved, and how to claim the R&D payroll tax credit even before generating income.

Insight

San Francisco Startup Tax Deadlines and Obligations (2026)

San Francisco moved its business registration deadline, rewrote its gross receipts tax under Prop M, and now exempts most sub $5 million startups from city tax. Here is the full 2026 calendar for SF founders, layered on top of the federal and California dates.

Glossary

Form 6765 (R&D Credit)

IRS form used to claim the federal R&D tax credit under IRC §41.

Back to all tools