Forms & Elections

How to Build a Business Component List for Section G

Building a business component list for Section G involves identifying all business components, organizing them by QREs, and prioritizing the largest components under the 80%/top-50 rule. The specific requirements should be verified against current instructions.

Building a business component list is a key part of preparing Form 6765 Section G. This page explains how to build a business component list. It is educational and is not individualized advice. For the underlying framework, see our page on Form 6765.

Step 1: Identify All Business Components

The first step is to identify all business components for which qualified research expenses are being claimed. Each business component should be a product, process, software, technique, formula, or invention being developed or improved. For more, see our page on identifying business components.

Step 2: Organize by QREs

The next step is to organize the business components by the amount of qualified research expenses for each. This helps identify the largest components and determine which represent 80% of total QREs.

Step 3: Apply the 80%/Top-50 Rule

The instructions may require reporting business components representing 80% of total QREs, up to 50 components. This means identifying the largest components by QREs and reporting those that represent 80% of the total, up to 50. The specific requirements should be verified against the current instructions.

Section G Exceptions

Section G is optional for tax years beginning before 2026. For tax years beginning after 2025, Section G is required, with two exceptions: (1) qualified small businesses (QSBs) making the payroll tax credit election under Section 41(h) are exempt, and (2) taxpayers whose qualified research expenses are $1.5 million or less AND whose average annual gross receipts are $50 million or less, reporting on an original return, are also exempt. The small-taxpayer exception does not apply to amended returns. Because Section G rules are tax-year-sensitive, readers should verify the current applicable thresholds and conditions against the current Instructions for Form 6765.

Step 4: Prepare the List

Prepare the business component list with the information required by the current instructions. This may include the business component name or description, the research activities performed, and the qualified expenses for each component.

Hypothetical Example

Consider a manufacturer that has 30 business components with qualified research expenses. The company identifies all 30, organizes them by QREs, and determines that the top 15 represent 80% of total QREs. Under the 80%/top-50 rule, the company may report those 15 components for Section G, subject to the current instructions.

This example is illustrative only.

Key Takeaway

Building a business component list for Section G involves identifying all business components, organizing them by QREs, and prioritizing the largest components under the 80%/top-50 rule. Because Section G requirements are tax-year-sensitive, professional review is appropriate.

Sources

  1. Instructions for Form 6765

    Internal Revenue Service

    Describes Section G business-component reporting, including the 80%/top-50 rule.

  2. Internal Revenue Code §41

    Cornell Law Institute (LII)

    Section 41(d)(2)(B) defines business component; §41(b) defines qualified research expenses.

  3. IRS — Required Information for a Valid Research Credit Claim for Refund

    Internal Revenue Service

    Describes the requirement to identify business components and qualified expense totals.

  4. Research Credit

    Internal Revenue Service

    IRS landing page for the Credit for Increasing Research Activities.

By R&D Ledger Editorial Team

Last reviewed: August 2026

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