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, but most small-to-mid businesses only need to complete one credit calculation method plus the summary section.

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 D — Qualified Research Activities (informational): Starting in recent years, the IRS requests additional detail about your research activities by business component. This section doesn't change the credit amount but provides supporting detail.

Most businesses should calculate both and file whichever produces the larger credit. 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 election is made annually — you're not locked into one method forever.

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)

The IRS has increased scrutiny of R&D credit claims. Contemporaneous documentation — records created as the work happens — is significantly more defensible than year-end reconstructions.

quarryFi generates the complete documentation package for Form 6765: qualifying expense calculations for both credit methods, per-project technical narratives, time allocation evidence from your actual development activity, and the form data itself. Your CPA reviews and files — you don't reconstruct anything from memory.