The R&D payroll tax credit lets a young, small business use part of its research credit against payroll tax instead of income tax. For tax years beginning after December 31, 2022, the limit is $500,000 a year [1]. That matters most for startups that spend on research but do not yet owe much income tax.
What the payroll tax credit is
The research credit, often called the R&D tax credit, normally reduces income tax. A startup with no profit may owe no income tax, so the credit would just sit there.
That is the gap the payroll tax credit closes. A qualified small business can choose (the IRS calls this an election) to use some of its research credit against the employer’s share of payroll tax [1][2]. That is the tax your business pays on your workers’ wages, on top of what it withholds from their pay.
The limit used to be $250,000. The Inflation Reduction Act of 2022 raised it to $500,000 for tax years beginning after December 31, 2022 [1]. If you read an older article that still says $250,000, it is out of date.
Who qualifies for the payroll tax credit
Only a “qualified small business” can make the election. Under the Form 6765 instructions, that is a corporation (including an S corporation) or a partnership with both of these [2]:
- Gross receipts (the total money it took in) of less than $5 million for the tax year.
- No gross receipts for any tax year before the five-year period ending with that tax year.
In plain terms, the business must be small and must have started bringing in money within the last five years. Other owners can qualify too. Add up the money from all their businesses and check both tests [2]. A tax-exempt organization, such as a charity, cannot qualify [2].
Two more limits trip people up:
- The five-year cap. Elected in five or more earlier years? Then no election this year [2].
- Related companies count as one. A controlled group, such as a parent company and its subsidiaries, counts as one taxpayer for the payroll tax credit. You add up all their gross receipts for the test [2].
The research itself must also qualify for the credit in the first place. That means the IRS four-part test, which looks for technical uncertainty and a real process of experimenting [3]. Our guide to how the R&D tax credit can benefit your business covers the credit itself.
5 clear steps to claim the payroll tax credit
Do them in this order. Miss the election deadline and you lose the payroll option for that year [1][2].
1. Work out the research credit. You figure the credit on Form 6765, Credit for Increasing Research Activities [1][2].
2. Make the election on time. You make the election on the same form [1]. The deadline is the due date of your first-filed income tax return for the year, counting any extension [1][2]. A partnership or S corporation makes it at the business level, not each owner [2].
3. Choose the amount. Three numbers cap the payroll tax credit, and the lowest one wins [2]:
- this year’s research credit;
- the amount you choose, up to $500,000;
- the general business credit carryforward, meaning credit you could not use in earlier years and carried into this one.
Partnerships and S corporations skip that last cap [2].
4. Wait for the next quarter. The payroll tax credit kicks in with the next calendar quarter after you file that income tax return [1].
5. Claim it on the payroll tax return. Fill in Form 8974 and attach it to your employment tax return for that quarter [2]. That is the quarterly payroll tax return you already file.
How the credit is used each quarter
Since the first quarter of 2023, the credit works in a set order each quarter [1]:
- It cuts your share of social security tax first, with a cap of $250,000 in any one quarter.
- Any credit left then reduces the employer share of Medicare tax for that quarter.
- Anything still left carries forward to the next quarter.
So when you see $250,000 today, it is the most the credit can cut from social security tax in one quarter. The yearly limit is $500,000 [1].
A worked example
These numbers are made up to show the timing. Your own figures depend on your research costs and your payroll.
A software startup is a C corporation with a calendar tax year. It was founded in 2024 and has $1.2 million in gross receipts for 2026. Its 2026 research credit, figured on Form 6765, is $90,000. It owes no income tax for 2026, so the whole $90,000 is unused and the carryforward cap does not cut it below $90,000 [2].
| When | What happens |
|---|---|
| During 2026 | The team does the research and keeps records of time and costs |
| By the 2026 return’s due date (with extensions) | The company files its income tax return with Form 6765, electing $90,000 as a payroll tax credit |
| Say the return is filed March 20, 2027 | The credit can start in the next quarter, April to June 2027 |
| Payroll tax return for that quarter | The company attaches Form 8974. The credit first cuts the employer share of social security tax, then Medicare tax |
| If the quarter’s payroll tax is smaller than the credit | The rest carries forward to the next quarter |
The startup gets value from the credit in 2027, long before it has profits to pay income tax on.
How the payroll tax credit fits with the research credit
You figure the research credit first, then choose how much of it to use against payroll tax [2]. The amount you use against payroll tax comes off your research credit carryforward [2].
It reduces only the employer’s share of social security and Medicare tax [1].
Limits and risks
- Miss the deadline, lose the election. The election has to be made by the due date of your original return, including extensions [1][2]. Plan it before you file.
- You cannot take it back alone. Undoing the payroll tax credit election needs the IRS’s consent [2].
- Five elections, then done. Once you have elected in five earlier years, you cannot elect again [2].
- Group rules. If your company is part of a controlled group of related companies, the whole group’s gross receipts count toward the $5 million test [2].
- The proof is on you. If the IRS examines the claim, you must show the research met every test [3]. Keep project notes, time records and payroll records as you go.
- Timing gaps. The credit only starts the quarter after you file [1]. Budget your cash flow with that delay in mind, as part of your quarterly tax planning.
How we can help
Hemlock Financial Group’s research and development tax credit services cover the research credit, including Form 6765. The service page also offers a free R&D credit consultation. To check whether your startup can use the payroll tax credit this year, book a consultation before you file.
Frequently asked questions
How much can a startup claim against payroll tax?
Up to $500,000 a year for tax years beginning after December 31, 2022 [1]. Your real payroll tax credit is the lowest of the year’s research credit, the amount you elect and, for some businesses, the credit carryforward [2].
Which payroll taxes does the credit reduce?
It cuts your share of social security tax first, capped at $250,000 a quarter. Then it cuts your share of Medicare tax [1]. Any credit left over carries forward to the next quarter [1].
When is the deadline for the election?
The due date of your original income tax return for the year, including extensions [1][2]. Put it on that return.
Does an S corporation or partnership qualify?
Yes, if it meets the gross receipts tests [2]. The election is made by the business, not by each owner [2].
This article is for informational and educational purposes only. It is not tax, legal or financial advice for your situation. Tax rules change, so talk with a qualified professional before you act.
Sources
- Research credit against payroll tax for small businesses, Internal Revenue Service: the $500,000 limit after 2022, the order of use against social security and Medicare tax, carryforward, election timing, the first quarter after filing, Form 6765 and Form 8974
- Instructions for Form 6765, Credit for Increasing Research Activities (Rev. December 2025), Internal Revenue Service: qualified small business tests, the smallest-of-three rule, entity-level election, the five-year cap, revocation only with consent, controlled groups, Form 8974 with the employment tax return
- Audit techniques guide: Credit for Increasing Research Activities, qualified research activities, Internal Revenue Service: the four tests, uncertainty, process of experimentation, the burden on the taxpayer
