Form 6765 Explained

IRS Form 6765, "Credit for Increasing Research Activities," is the tax form used to calculate and claim the federal R&D tax credit. It's filed as part of your annual tax return (attached to Form 1120 for corporations, or passed through on Schedule K-1 for partnerships and S-corps).

The form has multiple sections and completion requirements that can vary by tax year, claim type, taxpayer, and eligibility for an exception. A tax professional should review the current instructions before filing.

Section A — Regular Credit (Lines 1–13): Used if you have historical QRE data back to 1984 and your base amount calculation favors this method. The credit rate is 20% of QREs above the base amount.

Section B — Alternative Simplified Credit (Lines 14–22): The more commonly used method. The credit is 14% of QREs exceeding 50% of the average QREs for the prior three tax years. If you have no prior QREs, the rate drops to 6%.

Section C — Summary (Lines 23–40): Where the calculated credit flows, including any limitations, carryforward/carryback elections, and the final credit amount applied to your tax liability.

Section G — Business Component Information: For tax years beginning after 2025, Section G is generally required unless a stated exception applies. It requires business-component information for at least 80% of total QREs, up to 50 components.

The available methods and elections have timing and continuation rules. A tax professional can determine which calculations and elections are available for the taxpayer's facts. In practice:

• Startups and new filers almost always use the ASC (Section B) because they lack the historical data needed for the Regular Credit base amount.
• Established companies with growing R&D spending may benefit from the Regular Credit if their base amount is low relative to current spending.
• The ASC election has specific continuation and revocation rules under the current Form 6765 instructions.

Your CPA or tax preparer can run both calculations. quarryFi generates the data needed for either method.

Form 6765 reports numbers, but the IRS expects you to substantiate those numbers with documentation. Key records include:

• Time allocation records: How employees split their time between qualifying and non-qualifying activities
• Project descriptions: What each R&D project aimed to achieve and what uncertainty existed
• Technical narratives: For each business component, explain how the four-part test was met
• Financial records: Payroll data, contractor invoices, supply costs tied to research activities
• Contemporaneous evidence: Commit logs, design documents, experiment results, meeting notes created during the research (not reconstructed later)

Records created while work is happening can make later review easier, but their sufficiency depends on the facts, expense support, and filing position.

QuarryFi prepares estimates, project narratives, activity references, and draft filing inputs for review. Your CPA or tax attorney determines the final calculations, elections, substantiation, and filed form.