R&D Tax Credit for Startups: The $500,000 Payroll Offset (2026)

Most tax credits are worth nothing to a startup that does not make a profit yet: there is no income tax to reduce. The research and development (R&D) tax credit is different. Since 2016, a young company can elect to apply part of its research credit against payroll taxes instead, and since 2023 that amount is up to $500,000 a year. For a seed-stage startup paying engineers, that can mean real cash saved every quarter.

This guide explains what the credit is, which work qualifies, who counts as a qualified small business, how the payroll election works step by step, and the records you need. Rules were checked against IRS guidance and the Instructions for Form 6765 (December 2025) on November 2, 2026.

This is general information, not tax advice. R&D credit claims are reviewed closely; work with a CPA or a specialist who prepares them.

The credit in brief


Law	Internal Revenue Code section 41, Credit for Increasing Research Activities
Calculated on	Form 6765
Regular method	20% of qualified research expenses (QREs) above a base amount
Alternative simplified credit (ASC)	14% of QREs above 50% of the average QREs of the prior 3 years
Payroll election	Up to $500,000 a year for a qualified small business (tax years beginning after 2022)
Applied against	Employer Social Security tax first, then employer Medicare tax
Claimed on	Form 8974, attached to the quarterly payroll return (for example, Form 941)

What counts as qualified research

Not every development task qualifies. The IRS applies a four-part test to each business component (each product, process, software, technique, formula or invention) separately. Qualified research must:

Be treated as research or experimental expenditure under the tax code (section 174A for domestic research).
Be technological in nature, meaning it relies on principles of the physical or biological sciences, engineering or computer science.
Aim at a new or improved business component, for function, performance, reliability or quality.
Involve a process of experimentation for substantially all of the activities: evaluating alternatives to resolve uncertainty about capability, method or design.

The IRS also lists work that does not qualify, including:

research after the start of commercial production;
adapting an existing product or process to one customer’s needs;
duplicating an existing product or process;
surveys or studies;
research relating to certain internal-use software;
research done outside the United States or its territories;
research in the social sciences, arts or humanities;
research funded by another person or a government entity.

For a software startup, building and iterating on the product you sell often fits; building internal tools for your own back office usually faces the stricter internal-use software rules.

What expenses count

Qualified research expenses (QREs) are in-house research expenses plus contract research expenses:

Wages for employees doing, directly supervising or directly supporting qualified research. For most startups this is the largest part.
Supplies used up in the research.
Rental or lease of computers used in qualified research, when the computers are located off your premises and you are not the operator or primary user.
Contract research: generally 65% of amounts paid to outside contractors for qualified research done on your behalf.

Who can use the payroll election

Only a qualified small business (QSB) can apply the credit against payroll tax. Under the Form 6765 instructions, a QSB is a corporation (including an S corporation) or partnership with:

gross receipts of less than $5 million for the tax year, and
no gross receipts for any tax year before the 5-tax-year period ending with that year.

In plain terms: a young company, no more than five years into having revenue, still under $5 million a year. Other types of business can qualify by meeting the same tests on aggregate gross receipts.

How the payroll offset works

The maximum you can elect to apply against payroll tax is $500,000 per tax year (it was $250,000 for tax years beginning before 2023).
The credit first reduces the employer share of Social Security tax, up to $250,000 per quarter, then the employer share of Medicare tax.
Any amount you cannot use in a quarter carries forward to the next payroll return.
It reduces the employer share only. It does not reduce the employee taxes you withhold, income tax withholding or unemployment taxes.

Example

A startup has $600,000 of qualified wages for engineers in its first year with revenue and qualifies as a QSB. After its tax advisor figures the credit on Form 6765, the company elects $50,000 of it as a payroll tax credit. The company files its income tax return in March. Starting with the next quarter that begins after that filing date, it attaches Form 8974 to its Form 941, and the $50,000 reduces its employer Social Security tax (and then Medicare tax) for that quarter, with anything left carrying into the following quarters. The figures are illustrative; the credit amount depends on the calculation method and your actual QREs.

Step by step: claiming it

Track qualified work as it happens. Record which employees work on which projects, the technical uncertainty each project addresses and the experiments you run.
Figure the credit on Form 6765 with your tax advisor, using the regular method or the alternative simplified credit. Startups with no research history in prior years follow special rules in the instructions.
Make the payroll election on Form 6765 and attach it to your timely filed income tax return, including extensions. You cannot make the election on an amended return, so a missed deadline means a missed year.
Claim the credit on Form 8974, attached to your payroll tax return (for example, Form 941), starting with the first quarter that begins after you file the income tax return with the election.
Carry forward any unused amount to later quarters on Form 8974.

If a payroll provider or PEO files your payroll returns, tell them about the election in advance so the Form 8974 is attached to the right return. The IRS page above explains how aggregate filers and PEOs claim the credit for clients.

Records you need

R&D credits are a frequent review target, and the IRS has set out what a valid research credit refund claim must include. Keep, for each project:

a description of the business component and the technical uncertainty;
the alternatives you evaluated and the experiments you ran;
the employees involved, their roles and their time on each project;
wage, supply, computing and contractor costs tied to those projects.

Time-tracking by project and clean books make this far easier than rebuilding it at year end. Accounting software with class or project tracking, and payroll software with reports by employee, give you most of what an R&D study needs. We compare both in our guides to accounting software for startups and payroll software for startups.

Separately from the credit, the One Big Beautiful Bill Act (P.L. 119-21) added section 174A, which lets businesses deduct domestic research and experimental expenditures in tax years beginning after December 31, 2024, or elect to amortize them over at least 60 months. The deduction and the credit interact, so decide both with your tax advisor.

The bottom line

If your startup is under $5 million in gross receipts, has had revenue for five years or less and pays people to build new technology, check the R&D credit before you file your income tax return. The payroll election can turn up to $500,000 a year of credit into lower payroll taxes, but only if it is made on a timely Form 6765 and backed by project records.

More for startups: startup accounting basics, accounting software for startups and payroll software for startups.

Compare the toolsBest Accounting Software for Startups (2026): Investor-Ready BooksWe compare QuickBooks Online, Xero, Puzzle and Zoho Books for startups: accrual books, burn and runway reporting, users, and real monthly cost.

Frequently asked questions

Can a startup with no profit use the R&D tax credit?

Yes, through the payroll tax election. A qualified small business can elect to apply up to $500,000 of its research credit each year against the employer share of Social Security tax and then Medicare tax, which helps startups that have little or no income tax to offset.

What is a qualified small business for the R&D payroll credit?

A corporation (including an S corporation) or partnership with gross receipts of less than $5 million for the tax year and no gross receipts for any tax year before the 5-tax-year period ending with that year. Other businesses can qualify by meeting the same tests on aggregate gross receipts.

How do you claim the R&D payroll tax credit?

Make the election on Form 6765 attached to a timely filed income tax return, including extensions; it cannot be made on an amended return. Then claim the credit on Form 8974, attached to your quarterly payroll tax return, starting with the first quarter that begins after you file the income tax return.

Does software development qualify for the R&D credit?

It can, if the work passes the four-part test: it is technological in nature, aims at a new or improved product or process, and substantially all of it is a process of experimentation. Research relating to certain internal-use software, work after commercial production and adapting a product to one customer are excluded.

Sources and updates

Facts in this article were last checked against the official sources below on Nov 2, 2026. Rules and thresholds change, so confirm anything you act on with the official source or a qualified professional. Spot something out of date? Tell us and we will re-check it. How we work: editorial policy.