R&D tax credit for startups: use it against payroll tax

Receipts under $5 million and a recent first sale qualify

The IRS calls the company a qualified small business. It can be a corporation, including an S corporation, or a partnership. The test is about gross receipts, which the IRS defines under section 448(c), a wider measure than sales alone. Ask your CPA whether income such as interest on your cash balance counts.

For a 2026 return, for example, the company must have had no gross receipts in 2021 or any earlier year. A startup whose first dollar of revenue came in 2022 or later passes the age test.

The early-year credit is 6% of qualified research spend

The research credit is a percentage of qualified research expenses, which are in-house research costs (wages and supplies) plus contract research costs (65% of what you pay an outside person for qualified research). Under the alternative simplified method, the credit is 14% of qualified expenses above half of the average of the three prior years. If the company had no qualified expenses in any one of the three prior years, the credit is 6% of the current year's expenses.

To qualify, research must meet the IRS's four-part test, applied to each product or process separately. It must relate to expenditures treated as domestic research costs under section 174A, be aimed at discovering technological information, be meant to create a new or improved product or process, and substantially all of the activity must be a process of experimentation. Research done after commercial production begins is excluded.

You can elect the alternative simplified method on the original return or on an amended return, as long as you have not already claimed the regular research credit for that year and the year is still open for assessment. Treasury Regulation 1.41-9, as amended in 2015, allows this. The payroll offset election has its own rule: it goes on a return filed by its due date, including extensions.

So each $100,000 of qualified spend in an early year earns a $6,000 credit under the alternative simplified method (Form 6765 instructions and 26 U.S. Code section 41, checked Sep 30, 2026). For a corporation, Accountable's Tax › Return flags the wage, contractor and hosting accounts that may hold research costs, so your CPA starts the list from the books.

$36,000 of credit saves $22,950 in one quarter

The startup had $600,000 of 2026 qualified research expenses: engineer wages, supplies and 65% of contractor research. With none in the prior three years, the credit is 6% x $600,000 = $36,000. It elects all of it as a payroll tax credit on Form 6765, Section D.

It files its 2026 Form 1120 on March 15, 2027, so the first quarter that begins after filing is the second, starting April 1, 2027. Its $300,000 of quarterly wages are all under the Social Security wage base.

Had the same return been filed April 15, 2027, the first quarter beginning after the filing date would be the third quarter, starting July 1, and the offset would start three months later. The credit never reduces the employee share of payroll tax or income tax withholding.

Four forms carry the credit, in this order

1. 1

   Step 1: Figure the credit on Form 6765. A corporation completes Form 3800 first, then Section D of Form 6765 to make the payroll tax election (check the box on line 33a and enter the amount, not more than $500,000).

2. 2

   Step 2: File the income tax return with Form 6765 attached, on time including extensions. The election cannot be made later. A startup with no income tax files Form 1120 for this reason.

3. 3

   Step 3: After the return is filed, attach Form 8974 to the first Form 941 for the quarter that begins after the filing date. The amount on Form 8974 comes from Form 6765.

4. 4

   Step 4: Each quarter, the credit reduces the employer share of Social Security tax (up to $250,000 a quarter), then the employer share of Medicare tax. Carry any leftover to the next quarter and keep filing Form 8974 until it is used.

Form 941 is due April 30, July 31, October 31 and January 31, or the next business day. If the company files annual payroll returns (Forms 943 or 944), the credit starts on the annual return and needs an adjustment for the quarters that began after filing.

An election can be revoked only with the IRS's consent.

Electing the reduced credit keeps your research deduction whole

Section 280C, as amended by the One Big Beautiful Bill Act, reduces the domestic research costs a company deducts or capitalizes under section 174A by the amount of the research credit allowed. The company can avoid that by checking Yes at Item A on Form 6765 to take a reduced credit instead. Item A is chosen on the original timely return and is irrevocable, and the amount elected as a payroll credit counts as research credit for this purpose.

For most startups with losses the choice changes the size of the net operating loss carried forward, not the tax for the year. The section 174 guide explains the deduction side.

Keep the records that turn payroll into qualified expenses

• Wages by employee and by project, so the share of each person's time spent on qualified research is documented.
• Supplies used in the research, and contractor invoices for research done on your behalf.
• A short description of each product or process, with the uncertainty you were trying to resolve and the tests you ran.
• The date the product entered commercial production, since research after that date is excluded.
• Form 6765, Form 8974 and each Form 941 that used the credit, filed together.