IRS Form 6765 Instructions 2025: Complete Guide to the Research Credit

Understanding the IRS Form 6765 Instructions 2025 is important for businesses that want to calculate and claim the federal credit for increasing research activities. Form 6765 is used to determine the research credit, make the Section 280C election, and, for eligible qualified small businesses, elect to apply a portion of the credit against payroll taxes.

The IRS's current instructions are Instructions for Form 6765 (Rev. December 2025), which are used with the January 2025 revision of Form 6765.

What Is IRS Form 6765?

IRS Form 6765 is officially called Credit for Increasing Research Activities. Taxpayers use the form to calculate the federal research credit and make certain elections related to that credit.

Form 6765 can be used to:

• Calculate the research credit

• Elect the reduced credit under Section 280C

• Elect the Alternative Simplified Credit

• Report qualified research expenses

• Elect the qualified small business payroll tax credit

• Provide business-component information when required

The IRS states that partnerships and S corporations must file Form 6765 to claim the research credit. Other taxpayers generally don't have to complete Form 6765 when their only source of the credit is a partnership, S corporation, estate, or trust; instead, they can generally report that credit directly on Form 3800.

Who Can Claim the Research Credit?

The research credit may apply to taxpayers that incur qualified research expenses while conducting eligible research activities.

Potentially qualifying businesses may include companies involved in:

• Software development

• Engineering

• Manufacturing

• Technology

• Product development

• Process improvement

• Experimental design

• Product testing

However, operating in an industry associated with research does not automatically make a business eligible. The actual activities and expenses must satisfy the applicable requirements.

What Is Qualified Research?

The IRS generally describes qualified research using a four-part test.

Research generally must:

1. Relate to domestic research or experimental expenditures under the applicable rules.

2. Be undertaken to discover information that is technological in nature.

3. Be intended to develop a new or improved business component.

4. Substantially involve a process of experimentation related to a new or improved function, performance, reliability, or quality.

The four-part test is generally applied separately to each business component.

This means a business should evaluate its individual research projects instead of assuming that every activity performed by an engineering or R&D department qualifies.

What Are Qualified Research Expenses?

Qualified research expenses, commonly called QREs, are used when calculating the research credit.

Depending on the taxpayer's circumstances, QREs can include certain:

• Research wages

• Supply expenses

• Contract research expenses

• Computer rental or lease expenses

• Certain basic research payments

The IRS defines qualified research expenses as the sum of eligible in-house research expenses and contract research expenses paid or incurred by the taxpayer in carrying on a trade or business.

Not every expense associated with research automatically qualifies.

IRS Form 6765 Instructions 2025: Section-by-Section Overview

Form 6765 contains several sections. Which sections apply depends on your business, research activities, elections, and filing circumstances.

Section A — Regular Credit

Section A is used to calculate the research credit using the regular credit method.

The IRS instructions state that taxpayers should skip Section A when they are electing the Alternative Simplified Credit or previously elected the ASC and are not revoking that election for the current return.

Eligible taxpayers may want to calculate the credit using both methods before determining the appropriate calculation.

Section B — Alternative Simplified Credit

Section B is used for the Alternative Simplified Credit (ASC).

A taxpayer can use this section when electing the ASC or when the taxpayer previously elected the ASC and is not revoking the election for the current tax year.

The IRS states that an ASC election generally applies to the current tax year and later years. A taxpayer can revoke the election for a later tax year by completing Section A and attaching Form 6765 to the timely filed original return for that year.

Section C — Current-Year Credit

Section C is used to determine the current-year research credit after the applicable calculations have been completed.

The resulting credit is then handled according to the taxpayer's applicable federal tax-return requirements.

The filing process may differ depending on whether the taxpayer is a corporation, partnership, S corporation, or another type of entity.

Section D — Payroll Tax Credit Election

Certain qualified small businesses can elect to apply a portion of their research credit against the employer portion of Social Security taxes.

The IRS states that the maximum payroll-tax research credit a qualified small business can apply against payroll tax liability is $500,000.

The payroll tax election is an annual election and has specific eligibility and timing requirements.

A qualified small business claiming the payroll tax credit on its employment tax return must also complete Form 8974 and attach it to the employment tax return.

Section E — Other Information

Section E contains additional reporting requirements.

One important reminder in the current instructions is that if qualified research expenses are reported on line 48, Section E must be completed.

Taxpayers should carefully review the instructions applicable to each line instead of assuming that every business completes the section in exactly the same way.

Section F — Qualified Research Expenses Summary

Section F is titled Qualified Research Expenses Summary.

This section is used to indicate whether the taxpayer is required to complete Section G and to enter total QREs on applicable lines.

After Section F is completed, the total from line 48 is entered on the appropriate line of Section A or Section B, depending on the calculation method being used.

Section G — Business Component Information

One of the most important 2025 changes concerns Section G.

The current IRS instructions state that Section G is optional for all filers for tax years beginning before 2026. For tax years beginning after 2025, Section G becomes required, subject to specific guidelines and exceptions.

This means taxpayers working on a 2025 tax-year return generally do not have the same Section G requirement that applies to tax years beginning after 2025.

The IRS had previously announced that Section G would be optional for all filers for tax year 2025.

When Is Section G Required?

Under the current instructions, Section G is required for tax years beginning after 2025 unless an applicable exception applies.

The instructions identify exceptions, including certain qualified small businesses making the payroll-tax-credit election and taxpayers whose total QREs and average annual gross receipts fall within specified thresholds.

For taxpayers who are required to complete Section G, the IRS generally requires information covering at least 80% of total QREs by business component, with no more than 50 business components reported under the 80%/Top 50 approach.

What Is a Business Component?

A business component can generally include a:

• Product

• Process

• Computer software

• Technique

• Formula

• Invention

The research-credit test is generally applied separately to each business component.

Businesses should maintain records that identify the business components associated with their qualifying research activities and expenses.

Section 280C Election

Item A at the top of Form 6765 concerns the Section 280C reduced-credit election.

The IRS instructions state that the taxpayer must check Yes to elect the reduced credit or No not to elect it on the original timely filed return, including extensions.

The election cannot be made or changed on an amended return and is irrevocable for that tax year.

Because this election can affect the tax treatment of the research credit, taxpayers should review the current instructions carefully before making the election.

Controlled Group and Common-Control Rules

Item B asks whether the taxpayer is a member of a controlled group or business under common control.

If applicable, an attachment must be provided with information used to calculate the credit for the group.

The attachment can include information such as:

• Entity EIN

• Entity name

• Common parent or designated member

• Qualified research wages

• Qualified supply expenses

• Contract research expenses

• Total QREs

• Credit percentage

• Applicable credit amount

All members of a controlled group must follow the designated member's method and election under the applicable rules.

Research Activities That Generally Don't Qualify

The IRS instructions identify several activities that are excluded from the research credit.

These include:

• Research conducted after commercial production begins

• Research adapting an existing product to a particular customer's needs

• Duplication of an existing product or process

• Surveys or studies

• Certain internal-use software research

• Research conducted outside the United States or U.S. territories

• Research in the social sciences, arts, or humanities

Special rules and exceptions can apply, so taxpayers should review the current IRS instructions before deciding that a particular activity qualifies or does not qualify.

Internal-Use Software and Form 6765

Software developed primarily for a taxpayer's own internal use can have additional requirements.

The IRS states that internal-use software must satisfy the applicable qualified-research requirements and a high-threshold-of-innovation (HTI) test.

The HTI test considers whether the software is innovative, whether development involves significant economic risk, and whether the software is not commercially available for the intended use without qualifying modifications.

Therefore, internal software development should be evaluated carefully rather than automatically included as qualified research.

What Records Should You Keep?

Businesses claiming the research credit should maintain documentation supporting both the research activities and QRE calculations.

Useful records may include:

• Payroll reports

• Employee time records

• Project descriptions

• Research notes

• Technical documentation

• Testing records

• Prototypes

• Invoices

• Contractor agreements

• General ledger reports

• QRE calculations

• Business-component records

Good documentation should show what research was performed, which employees or contractors were involved, and how the claimed expenses were calculated.

Form 6765 and Amended Returns

Special requirements apply when a taxpayer claims a research credit on an amended return or administrative adjustment request.

The current IRS instructions state that specific information must be provided when an amended return or AAR includes a Section 41 research credit that was not reported on the original return or increases the amount originally reported.

This information can involve the research activities, business components, and qualified research expenses associated with the claim.

Taxpayers should review the current amended-return requirements before submitting a research-credit claim.

Common Mistakes With IRS Form 6765

Using Outdated Instructions

One of the most common mistakes is relying on an older Form 6765 or outdated instructions.

For 2025 filings, use the current IRS materials associated with the January 2025 revision and December 2025 instructions.

Treating Every R&D Expense as a QRE

Not every research-related expense qualifies.

Evaluate both the underlying activity and the expense.

Incorrect Employee-Wage Allocation

Employees may work on qualifying and nonqualifying activities. Maintain records that support the portion of wages included in QREs.

Ignoring Controlled-Group Rules

Businesses under common control may need to calculate the credit using controlled-group rules.

Inadequate Documentation

Keep sufficient records to substantiate the research activities and credit calculation.

Frequently Asked Questions

What are the IRS Form 6765 instructions for 2025?

The IRS Form 6765 instructions explain how to calculate the research credit, make applicable elections, report qualified research expenses, and complete the relevant sections of the form. The current instructions are revised December 2025 and are used with the January 2025 revision of Form 6765.

Who needs to file Form 6765?

Partnerships and S corporations must file Form 6765 to claim the research credit. Other taxpayers generally don't need to file it when their only source of the research credit is a partnership, S corporation, estate, or trust.

Is Section G required for the 2025 tax year?

No. Under the current instructions, Section G is optional for all filers for tax years beginning before 2026, subject to special amended-return rules.

What is the maximum payroll tax credit?

A qualified small business can elect to apply up to $500,000 of research credit against applicable payroll tax liability, subject to the requirements in the IRS instructions.

What expenses can qualify for the research credit?

Potential QREs include certain in-house research wages, supplies, and contract research expenses. The expenses must satisfy the applicable federal requirements.

Can software development qualify for the research credit?

Yes, certain software-development activities can qualify. However, software development must satisfy the applicable research-credit requirements, and additional rules apply to certain internal-use software.

Where can I find the official IRS Form 6765 instructions?

The IRS publishes the current Form 6765 and instructions on its official website. The current instructions are listed as Rev. December 2025, for use with the January 2025 revision of Form 6765.

Need Consultation About Form 6765?

If you have questions about the IRS Form 6765 Instructions 2025, qualified research expenses, eligibility, Section 280C, or the research-credit filing process, you can call 1-866-513-4656 for consultation.

Before filing, verify the latest IRS instructions and applicable tax rules for your specific business and tax year. A qualified tax professional can review your circumstances and help determine which requirements and elections may apply.

This article is for general informational purposes only and is not tax or legal advice. Form 6765 requirements can vary depending on the taxpayer, entity structure, tax year, research activities, and applicable federal law.

Conclusion

The IRS Form 6765 Instructions 2025 provide important guidance for businesses calculating the federal research credit. Start by identifying qualifying research activities and determining your qualified research expenses. Then review the applicable credit calculation method, Section 280C election, controlled-group requirements, payroll-tax election, and Section F reporting.

For 2025 tax years, Section G is optional under the current IRS instructions. Taxpayers should nevertheless keep detailed business-component and research records because these records can help substantiate the credit and prepare for future reporting requirements.

Always use the current IRS Form 6765 and instructions rather than relying on older versions, and consider professional tax advice when the research credit or filing requirements are complex.