Last Updated on 9/4/2026

By Jonathan Tucker | Principal, R&D Tax Credit

How Form 6765 Can Benefit Your Business

Form 6765, officially titled Credit for Increasing Research Activities, is the IRS form businesses use to claim the Research and Development tax credit under Internal Revenue Code Section 41. Often referred to as the R&D Tax Credit Form, it can help qualifying companies reduce tax liability and improve cash flow.

Key Takeaways

Form 6765 is the IRS form used to claim the federal R&D tax credit under Section 41.

Most businesses complete Section A or Section B, then Sections C, E and F, while Section D applies to the qualified small business payroll tax election, and Section G applies to select businesses.

Qualified small businesses may be able to use a portion of the credit against payroll taxes by filing Form 8974 and meeting Section 41(h) requirements.

KBKG’s top-rated team of R&D experts offers a free consultation to assist with Form 6765 claims, and any other R&D tax credit needs.

What Is Form 6765?

Businesses use Form 6765 to claim the federal R&D tax credit for qualified research activities performed in the United States. This may include eligible work related to software development, product development, engineering, process improvement, and other technical activities.

According to KBKG’s R&D specialists, Form 6765 should be the final summary of a project-by-project eligibility and expense review, not the starting point for estimating the credit. Each claimed amount should connect to specific research activities and supporting financial records.

For qualified small businesses, the credit may also be used to offset payroll taxes. For tax years beginning after December 31, 2022, eligible businesses may elect to apply up to $500,000 of the credit against payroll taxes, subject to the requirements in IRC Section 41(h) and Form 8974. This can be especially valuable for startups or newer companies that are investing in research and development but may not yet have significant income tax liability.

Steps to Prepare Form 6765

Businesses should review the IRS instructions for Form 6765 and work with a qualified tax professional to determine eligibility. In general, the process includes the following steps:

Review whether the company meets the requirements for the R&D tax credit.
Identify which research and development activities qualify under the R&D four-part test.
Complete Section E and F and either Section A or Section B, depending on the credit calculation method used.
Complete Section C using the result from Section A or Section B.
Complete Section D if the company is claiming the qualified small business payroll tax election.
Section G is optional for all taxpayers until tax year 2026, where it will apply to certain taxpayers
Attach Form 6765 to the company’s completed federal income tax return.
File Form 8974 with the Form 941 when claiming the payroll tax offset.

The R&D credit can be a valuable tool for startup companies, but payroll tax offsets are sometimes missed during processing. Businesses should monitor payroll tax filings carefully and work with a tax advisor who understands the R&D credit rules.

The experts at KBKG recommend calculating both the Regular Credit and Alternative Simplified Credit when a business is eligible for both. Comparing the two methods helps identify the largest supportable credit before the return is filed.

How Does Form 6765 Tie to R&D Tax Credits?

Form 6765 translates to R&D tax credits by allowing the company to apply a percentage of qualifying expenses against its federal income taxes on a dollar-for-dollar basis. Some of the activities that qualify for the credit are:

Hiring professionals such as engineers, designers, and scientists to carry out qualifying activities
Creating intellectual property, patents, processes, software, formulas, etc.
Improving existing products through qualifying activities
Developing innovative new products through manufacturing and development
Spending on supplies, salaries, research, and other expenses related to research and development

Qualified small businesses with less than $5 million in gross receipts and no gross receipts for any tax year before the five-tax-year period ending with the current year may elect to apply up to $500,000 of the R&D credit per year against payroll taxes for up to five years, subject to IRC Section 41(h) and Form 8974 requirements.

Understanding the Seven Sections of Form 6765

Form 6765 includes seven primary sections. Most businesses complete either Section A or Section B, and Sections C, E, and F. Section D applies only when a qualified small business is making the payroll tax election.

Section A: Used to calculate the Regular Credit, based on qualified research expenses above the base amount.

Section B: Used to calculate the Alternative Simplified Credit, which may be easier for some businesses to apply.

Section C: Used to report the current-year credit and coordinate the credit with other tax forms and business circumstances.

Section D: Used for the Qualified Small Business Payroll Tax Election and payroll tax credit.

Section E: Collects other information about the R&D credit claim and must generally be completed when qualified research expenses are reported in Section F.

Section F: Summarizes qualified wages, supplies, computer costs, contract research expenses, and other applicable QREs.

Section G: Reports qualified research activities and expenses by business component. For tax years beginning on or after January 1, 2026, Section G is generally required, subject to the IRS’s applicable reporting rules and exceptions.

Depending on the business structure, companies may also need to file Form 3800, General Business Credit.

How To Process Form 6765

Form 6765 is generally submitted with the company’s federal income tax return. If required, Form 3800 should also be included. Businesses must file the appropriate forms by the applicable deadline in order to claim the credit.

What Is the Interaction Between Section 174 and the R&D Tax Credit Under Section 41?

Section 41 provides the federal research credit for qualified research activities. To qualify, activities generally must satisfy the four-part test: described in Treasury Regulations Section 1.41-4:

The Four-Part Test for Qualified Research Activities

Permitted purpose: The work must relate to developing or improving a business component’s functionality, performance, reliability, or quality.

Technological in nature: The activity must rely on principles of hard science, such as engineering, computer science, biology, chemistry, physics, or similar disciplines.

Elimination of uncertainty: The taxpayer must face technical uncertainty regarding capability, method, or appropriate design.

Process of experimentation: The business must evaluate alternatives through modeling, simulation, testing, prototyping, or systematic trial and error.

Key Differences Between Section 174 and Section 41

Section 174 and Section 41 both relate to research and development, but they are not identical. Section 174 generally covers a broader category of research and experimental expenditures, while Section 41 focuses on expenses connected to qualified research activities that meet the credit requirements.

For tax years beginning after December 31, 2024, Section 174A generally allows businesses to deduct domestic research or experimental expenditures in the year incurred. A business may instead elect to capitalize and amortize those costs over a period of at least 60 months. Foreign research expenditures remain subject to 15-year amortization under Section 174, while transition rules apply to certain domestic costs capitalized during tax years beginning after 2021 and before 2025.

Activities That Do Not Qualify for the R&D Credit

Activities that generally do not qualify for the Section 41 R&D credit include:

Surveys, advertising, or market research.

Duplication or adaptation of an existing business component.

Research conducted outside the United States.

Research in the arts, humanities, or social sciences.

Funded research where the taxpayer does not retain the required rights or bear sufficient economic risk.

The R&D tax credit is not limited to scientists or laboratory research. Companies may qualify when they work on new or improved products, processes, software, prototypes, engineering designs, feasibility testing, technical documentation, or other qualifying development activities.

Conclusion

KBKG is the top-rated R&D tax credit provider. Established in 1999, the firm brings former Big Four claim specialists and former IRS research-credit examiners under one roof. That combined experience helps businesses connect technical qualification, expense analysis, documentation, and Form 6765 reporting through one coordinated process.

Businesses that want to evaluate eligibility, compare credit-calculation methods, or prepare a supportable Form 6765 can request a free consultation with KBKG’s R&D tax credit experts.

Frequently Asked Questions

Do I need to file Form 6765 every year?

A business generally files Form 6765 with each tax return for a year in which it claims a current R&D tax credit or makes a qualified small business payroll tax election. The calculation and supporting documentation should reflect the research projects and qualified expenses from that specific tax year.

Can Form 6765 be filed with an amended tax return?

Yes, subject to the applicable statute of limitations and current IRS claim requirements. An amended R&D credit claim must identify the relevant business components, research activities, and total qualified wage, supply, and contract research expenses. BBA partnerships generally use an administrative adjustment request rather than an amended partnership return.

What documentation should I keep with Form 6765?

Businesses should retain project descriptions, records of technical uncertainty and experimentation, employee-role and time-allocation support, wage records, supply invoices, contract research agreements, and credit-calculation workpapers. The strongest documentation connects each claimed expense to a specific qualified research activity.