Form 6765 and Form 8974: How to Claim the R&D Payroll Tax Credit

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These Form 6765 instructions and Form 8974 instructions walk through how to claim the R&D payroll tax credit, the qualified small business payroll election in section 41(h), from the first eligibility test to the last quarter of carryforward. Line numbers match the current revisions: Form 6765 (Rev. December 2024) with its December 2025 instructions, Form 8974 (Rev. December 2024), and Form 941 for 2026 (Rev. March 2026).

The election moves up to $500,000 a year of the federal research credit off the income tax return and onto the quarterly payroll tax return. The IRS describes it as designed for an eligible startup with little or no income tax liability. It has one hard deadline, a five-year limit, and a quarterly routine that runs until the credit is used up. The Payroll Credits page covers what BEG handles; this guide covers the forms themselves.

Step 1: Confirm you are a qualified small business

Two tests decide whether the payroll election is open to you, and both are measured for the tax year you are claiming:

• Gross receipts under $5 million for that tax year.
• No gross receipts in any tax year before the five-tax-year period that ends with that year.

Only the current year has to come in under $5 million. In the IRS example in Notice 2017-23, a company with $7 million of receipts in an earlier year inside the five-year window still qualified, because that earlier amount did not matter. The same example shows how a company ages out: once it has receipts in a year before the window, it no longer qualifies, whatever its current revenue.

Gross receipts follow the section 448(c)(3) rules, and every member of a controlled group counts toward one combined total. Tax-exempt organizations cannot use the election. You also need an actual research credit to elect, which means qualified research expenses (QREs) from work that passes the four-part test in section 41(d):

1. The costs are domestic research or experimental expenditures under section 174A.
2. The work seeks information that is technological in nature.
3. That information is meant to develop a new or improved business component: a product, process, software, technique, formula or invention.
4. Substantially all of the work (80% or more, under Treas. Reg. 1.41-4) is a process of experimentation aimed at function, performance, reliability or quality.

Section 41(d)(4) excludes research after commercial production begins, adapting an existing product to a particular customer, duplicating an existing product, surveys and routine data collection or quality-control testing, research in the social sciences, arts or humanities, research outside the United States, Puerto Rico and U.S. possessions, research funded by someone else, and internal-use software that does not clear the extra tests in the regulations. Not sure you pass? The five-question eligibility check shows a result on screen without asking for contact details.

Step 2: Figure the research credit on Form 6765

The payroll election can only move a credit you have already computed, so Form 6765 fills in from the back: Section F (and Section G if you use it), then the credit method, then Section D. Section F totals QREs by type:

• Line 42: wages for qualified services, meaning doing, directly supervising or directly supporting qualified research. Wages used for the work opportunity credit stay out.
• Line 43: supplies used in the research. Land, land improvements and depreciable property do not count.
• Line 44: rental or lease of computers used in the research, only when the computers are off your premises and you are not the operator or primary user.
• Line 45: contract research at 65% of what you paid (75% for a qualified research consortium, 100% for certain energy research).
• Line 48: the total, carried to line 5 for the regular credit or line 20 for the Alternative Simplified Credit.

Section A, the regular credit, is 20% of QREs above a base amount, and the base can never fall below 50% of the current year's QREs. Section B, the Alternative Simplified Credit (ASC), compares this year's QREs with the three prior years:

• Line 21: total QREs for the prior three tax years.
• Line 22: line 21 divided by 6.0, which is half the three-year average.
• Lines 23 and 24: 14% of the current QREs above line 22. If any one of the three prior years had no QREs, skip lines 22 and 23 and take 6% of the current QREs instead.
• Line 26: 79% of line 25 if you elect the reduced credit under section 280C; otherwise the full amount.

Item A, at the top of page 1, is that section 280C question, and it must be answered Yes or No on the original, timely filed return. It cannot be made or changed on an amended return. For tax years beginning after December 31, 2024, section 280C(c) works like this: answer No and your section 174A deduction for domestic research costs is reduced by the full credit, including the part you elect as a payroll credit; answer Yes and the deduction stays whole while the credit is cut to 79% (15.8% instead of 20% on the regular credit).

Section E (lines 37 to 41) is required whenever line 48 shows QREs: the number of business components, officers' wages included in line 42, whether you acquired or disposed of a major portion of a business, whether you added new categories of expenses, and any amounts determined under the ASC 730 Directive. Section C then carries the credit to line 28, the figure Section D starts from.

Step 3: Make the payroll election in Section D

Section D, lines 33a to 36, is the election itself. Complete it only if you are electing.

Three details matter here. Filers other than partnerships and S corporations must complete Form 3800 before Section D, because line 35 depends on it. Line 35 is also why a C corporation that owes income tax may be able to elect less than its full credit: the election cannot exceed the general business credit left unused after income tax for the year, which is what line 35 measures. And partnerships and S corporations that elect report on Schedule K the line 30 credit minus line 36.

The election is annual and is made again each year you want it. It can be revoked only with IRS consent, and every election year counts toward the five-year limit. In a controlled group each member elects separately, and the $500,000 is divided among members in proportion to their QREs whether or not every member elects; the instructions describe the statement to attach.

Step 4: File the income tax return on time

The election exists only on an original income tax return filed by its due date, including extensions: Form 1120 for a C corporation, Form 1120-S for an S corporation, Form 1065 for a partnership. The IRS says plainly on its payroll tax credit page that an election cannot be made with an amended return. Miss the extended due date and the payroll election for that year is gone, and the credit stays an income tax credit.

For calendar-year 2026 returns, the due dates are March 15, 2027 for Forms 1120-S and 1065 (September 15, 2027 with a Form 7004 extension) and April 15, 2027 for Form 1120 (October 15, 2027 with an extension).

The filing date also sets the start date. The credit begins in the first calendar quarter that begins after the return is filed, so filing before the deadline can move the first offset up by a quarter or more:

The IRS examples line up with this: a 2024 return filed March 17, 2025 made April to June 2025 the first quarter, and in the Form 941 instructions a 2025 return filed April 15, 2026 made July to September 2026 the first. That first quarter's Form 941 is where the credit must be claimed; later quarters only take carryforward.

Step 5: Complete Form 8974 for the first eligible quarter

Form 8974 has two parts. Part 1 lists each tax year you elected, one row per year, earliest first. There are five rows because there can be at most five election years.

• Column (a): the last day of the income tax year, such as 12/31/2026.
• Column (b): the return that carried Form 6765 (Form 1120, 1120-S, 1065 and so on).
• Column (c): the date that return was filed.
• Column (d): the EIN used on Form 6765, when it differs from the payroll EIN.
• Column (e): Form 6765 line 36 (line 44 for tax years beginning before 2024), or the amount allocated to your EIN within a controlled group.
• Column (f): how much of column (e) was used in earlier quarters.
• Column (g): column (e) minus column (f). Line 6 totals column (g), the credit available this quarter.

Part 2 then applies that credit in the order section 3111(f) sets: employer Social Security tax first, employer Medicare tax second.

Lines 11 and 15 have their own adjustments if you are a third-party payer of sick pay or received a section 3121(q) Notice and Demand for tax on unreported tips; the check boxes on line 11 flag either case, and the instructions show the math.

Step 6: Report the credit on Form 941 line 11

On Form 941 for 2026 (Rev. March 2026), line 11 is the qualified small business payroll tax credit for increasing research activities. Enter Form 8974 line 12 if you stopped there, otherwise line 17, and attach Form 8974. Form 941 line 12 is then line 10 minus line 11. (The 941 itself is explained in Form 940 vs. Form 941.)

Monthly and semiweekly depositors carry the credit into their liability records as well. Per the Form 941 instructions, take it against the employer Social Security liability starting with the first payroll of the quarter, then against employer Medicare, on line 16 or Schedule B (Form 941); the quarter's total liability there must equal line 12, and no period can go below zero. Your deposits take the credit into account the same way, on your normal deposit schedule. The credit never offsets income tax withholding or the employee share of Social Security or Medicare.

Annual filers use the same form: the credit goes on Form 944 line 8 or Form 943 line 12. They adjust Form 8974 lines 11 and 15 so only quarters that began after the income tax return was filed count, and the Social Security portion is capped at $1 million for the year instead of $250,000 per quarter.

If a PEO, CPEO or other section 3504 agent files an aggregate Form 941 for you, it claims your credit on its return with Schedule R and a separate Form 8974 for your business. The election itself still has to be on your own timely filed income tax return. BEG coordinates Form 8974 with whoever files your Form 941; when BEG already runs your payroll through Managed Payroll (from $25 per employee per month), that side is handled in-house.

Step 7: Carry forward any unused credit

When the credit is larger than a quarter's employer Social Security and Medicare tax, the excess carries to the next quarter, and the next, until it is used. It cannot be carried back to an earlier quarter. Each quarter's Form 8974 repeats the same Part 1 row for that tax year, with the running total of credit already used in column (f), until column (g) reaches zero.

New election years stack. Each year's election gets its own row, capped at $500,000 per row, but lines 6 and 7 can exceed $500,000 while older credit is still carrying forward. Mistakes on a filed Form 8974 are fixed on Form 941-X (or 943-X or 944-X) with a corrected Form 8974 attached.

Section G and business component reporting

Section G (lines 49(a) to 56) reports QREs by business component: the EIN, principal business activity code, the component's name or ID, its type (product, process or all others), the software type if it is software, and wages, supplies, computer rental and contract research for each one. When it applies, it covers at least 80% of total QREs, up to 50 components listed largest first, with everything else on a single Aggregate Business Components line. Whether you must complete it depends on the tax year:

• Tax years beginning before 2026: optional for every filer, so a calendar-year 2025 return can leave it blank.
• Tax years beginning after 2025: required unless (1) you are a qualified small business that checked the payroll election box, or (2) your total QREs at the controlled-group level are $1.5 million or less, your average annual gross receipts for the prior three years are $50 million or less, and you are claiming the credit on an original return.

So a startup electing the payroll credit on its 2026 return falls within the first exception, as the IRS confirmed in IR-2025-99. It still completes Sections E and F. Column 49(f), the information sought to be discovered, is currently required only on an amended return that claims a new or larger credit.

Worked example: one election, three quarters

A calendar-year C corporation had its first revenue in 2024, has $2 million of gross receipts for 2026, and owes no income tax for 2026. It uses the ASC and answers No to Item A.

Because Item A is No, the company's 2026 section 174A deduction is reduced by $87,500. Answering Yes would have made line 26 $69,125 (79%) with no reduction to the deduction.

It files the 2026 return on March 10, 2027, so April to June 2027 is the first quarter. Each quarter it pays $450,000 of wages, all subject to both Social Security and Medicare tax, so Form 941 line 5a, column 2 is $55,800 and line 5c, column 2 is $13,050.

The $87,500 is fully used by the end of 2027. In the fourth quarter line 12 equals line 7, so the form stops there. Without the election, the same $87,500 would have stayed an income tax credit, carried back one year or forward up to 20 years under section 39 until the company had income tax to absorb it.

Form and line map

Every line this guide touches, in one place.

Records to keep

The regulations require a taxpayer claiming the credit to keep records "in sufficiently usable form and detail" to show the expenses qualify (Treas. Reg. 1.41-4(d)). For this election, that file should include:

• A list of business components and, for each one, the research activities performed. These are the same items the IRS requires with a research credit refund claim.
• How each person's wages were split between qualified services and other work, tied to the W-2 wages used.
• Supply invoices and the contracts behind any contract research (65% of what you paid counts).
• The prior three years of QREs used on line 21, and how each year was figured.
• The filed Form 6765 and the date the return was filed, since that date drives Form 8974 column (c) and your first quarter.
• Every Form 8974 and Form 941 until column (g) reaches zero, plus the Section G data if you are not excepted.

The form instructions say records must be kept as long as their contents may become material in the administration of any Internal Revenue law, which includes every quarter in which credit from that year is still being claimed.

Mistakes that forfeit or shrink the election

1. Filing after the extended due date. The election is valid only on a timely filed original return. A late return loses it for that year.
2. Planning to add it later. Neither Section D nor the Item A section 280C answer can be made on an amended return.
3. Testing one entity instead of the group. The $5 million test, the five-year window and the five-election limit all count every member of a controlled group.
4. Missing the five-year window. Receipts in any year before the five-year period ending with the credit year end eligibility, whatever the current revenue.
5. Skipping Form 3800 and line 35 (C corporations). Line 36 must be the smallest of lines 28, 34 and 35.
6. Carrying the wrong number. Form 8974 column (e) takes Form 6765 line 36, not line 34 or line 28.
7. Claiming on the wrong Form 941. The first claim belongs on the Form 941 for the first quarter that begins after the return is filed. Other quarters take only carryforward.
8. Leaving Form 8974 off, or letting Schedule B disagree. An amount on line 11 needs Form 8974 attached, and line 16 or Schedule B has to total to line 12.
9. Applying it to the wrong taxes. It reduces only the employer share of Social Security and Medicare, never withholding or the employee share.
10. Losing track of column (f). Each quarter needs the running total of credit already used, or column (g) will be wrong.

Missed the election in an earlier year?

The payroll route for that year is closed, because the election cannot be made on an amended return. The research credit itself can still be claimed against income tax on an amended return while the refund period is open, generally 3 years from when the return was filed or 2 years from when the tax was paid, whichever is later (IRC 6511). The IRS requires those claims to identify every business component, the research activities for each, and the total qualified wage, supply and contract research expenses, per its research credit claims FAQs. Recovering open years is the Credit Recovery work described on the Tax Planning page.

Sources: IRS, Form 6765 (Rev. December 2024); IRS, Instructions for Form 6765 (Rev. December 2025); IRS, Form 8974 (Rev. December 2024); IRS, Instructions for Form 8974 (Rev. December 2024); IRS, Form 941 for 2026 (Rev. March 2026); IRS, Instructions for Form 941 (Rev. March 2026); IRS, Qualified small business payroll tax credit for increasing research activities; IRS, Notice 2017-23; IRS, IR-2025-99 (October 1, 2025); IRS, Research credit claims (Section 41) on amended returns FAQs; 26 U.S.C. 41; 26 U.S.C. 280C; 26 U.S.C. 3111; 26 U.S.C. 6511; Treas. Reg. 1.41-4 (eCFR). Line numbers and rules checked against these sources on September 25, 2026. This is general information, not tax advice for your situation. Tax services are provided by licensed tax professionals under a separate engagement agreement. BEG does not provide tax advice.