Section 41 R&D Tax Credit: How Small Businesses Claim Qualified Research Expenses on Form 6765

The IRS provides Form 6765 so businesses can "figure and claim the credit for increasing research activities."^[1] This is a dollar-for-dollar federal income tax credit (not a deduction) on qualified wages, supply costs, and contractor fees that a US business pays for activities satisfying the IRS definition of qualified research.^[2]

The credit is not limited to pharmaceutical companies or large R&D departments. A South Florida engineering firm experimenting with a new manufacturing process, a software company building novel functionality, or a contractor testing new structural methods can each qualify when their activities meet the IRS standard. For guidance on how the credit interacts with your business return and Section 174A deduction rules, see business tax return preparation.

Not every research project meets the IRS standard. The Form 6765 instructions require that qualified research satisfy all four of the following elements:^[4]

1. Expenditures must be treated as domestic research expenditures under Section 174A. 2. The research must be undertaken to discover information that is technological in nature. 3. The application of that information must be intended to be useful in developing a new or improved business component. 4. Substantially all activities must constitute a process of experimentation related to a new or improved function, performance, reliability, or quality.

All four parts are required. A project that fails even one produces no qualified research expenses. Common exclusions include surveys and studies, social science research, market research, research conducted after commercial production of a product has begun, and duplication of an existing product or process.

The Form 6765 instructions define qualified research expenses as the sum of "in-house research expenses and contract research expenses paid or incurred by the taxpayer in carrying on any trade or business of the taxpayer."^[3]

In-house expenses include wages paid to employees who directly perform, directly supervise, or directly support qualified research, and the cost of supplies consumed in the research process. Contract research expenses cover a portion of amounts paid to third parties for qualified research performed on your behalf. The contractor must actually perform work that satisfies the four-part test, and the business paying must bear the economic risk.

Keeping project time logs, payroll records, and technical documentation that connect each expense to a specific qualifying activity is essential. An IRS examination of the credit will focus on whether your records support each claimed expense. For businesses relying on outside technical talent, advisory solutions can help structure engagements so contractor payments are documented in a way that supports a defensible credit claim.

Form 6765 offers two ways to compute the credit. The regular research credit method applies the credit rate to qualified research expenses above a historical base amount, which is derived from your prior years of gross receipts and research spending. The alternative simplified credit (ASC) uses 50 percent of your average qualified research expenses for the prior three tax years as the base, which simplifies the math for businesses with stable research activity.

You may also elect the reduced credit under Section 280C.^[1] That election lowers the credit rate but preserves your full deduction for research expenses under Section 174A. Without the election, the credit reduces your research deduction by a corresponding amount. Which approach produces more tax benefit depends on your effective tax rate and the size of your research spending relative to prior-year baselines. For background on how Section 174A expensing changed under the One Big Beautiful Bill, see Section 174A and R&D Expensing in 2026: What the One Big Beautiful Bill Reversed.

For startups and early-stage businesses that have substantial research costs but little or no income tax liability, the payroll tax credit election makes the research credit immediately useful. The IRS instructions state that the payroll tax credit election "is an annual election made by a qualified small business specifying the amount of research credit, not to exceed $500,000, that may be used against the employer portion of social security liability."^[5]

To qualify as a qualified small business, the IRS requires gross receipts of less than $5 million for the current tax year and no gross receipts in any tax year before the five-tax-year period ending with the current year.^[6] This makes the election best suited for early operating years before revenue scales.

Once elected, the credit reduces the employer Social Security tax deposits you owe each quarter. Because those deposits are real cash obligations (not future income tax offsets), the election can deliver near-term payroll relief for product-development companies and South Florida technology businesses. For industry context on how this credit and other employment tax obligations interact, see professional services tax help.