Controlled groups and businesses under common control receive special treatment under the R&D tax credit rules. This page explains the general framework at a high level. It is educational and is not individualized tax advice, and it does not attempt an individualized controlled-group determination. For the calculation overview, see our page on how the R&D tax credit is calculated.
The Controlled-Group Rule
Under Section 41(f)(1) of the Internal Revenue Code, members of a controlled group of corporations (as defined in Section 41(f)(5)) and trades or businesses under common control (as defined in regulations) are treated as a single taxpayer for purposes of computing the research credit. This means that related entities within a controlled group generally cannot each independently compute and claim the credit as if they were unrelated.
Why Related Entities Cannot Always Calculate Independently
The controlled-group rule exists to prevent related entities from artificially splitting research activities and expenses among multiple entities to maximize the credit. By treating the group as a single taxpayer, the credit is computed on a consolidated basis, and the rules that depend on aggregate amounts — such as the base amount, the ASC comparison amount, and the gross-receipts figures — are applied at the group level.
Aggregate Calculation Concepts
When a controlled group is treated as a single taxpayer, several aspects of the credit calculation are affected:
- QREs. The qualified research expenses of all group members are generally aggregated for purposes of the credit computation.
- Gross receipts. For the regular method, the gross receipts of all group members are generally aggregated for purposes of the base amount computation.
- Fixed-base percentage. The fixed-base percentage and the 1984–1988 historical data may be determined at the group level.
- Credit computation. The credit is computed as if the group were a single taxpayer, which can affect the base amount, the ASC comparison amount, and the resulting credit.
Allocation Concepts
Under Section 41(f)(3), the credit computed at the group level is allocated among the members of the controlled group. The allocation is generally based on the proportion of each member's QREs to the total group QREs, or as otherwise provided by the applicable rules and regulations. Each member then reports its allocated share of the credit on its own Form 6765.
The allocation rules can be technical, and the specific method depends on the applicable regulations and the group's facts. The Instructions for Form 6765 address controlled-group reporting, including how members indicate their controlled-group status and report their allocated shares.
Common Control
"Common control" is a defined concept. For corporations, Section 41(f)(5) refers to the controlled-group rules of Section 1563(a), which generally involve ownership thresholds. For trades or businesses under common control, the regulations provide definitions that may include various ownership and control relationships. Whether entities are under common control is a facts-and-circumstances determination that can be technical.
This page does not attempt to determine whether any particular group of entities is under common control. That determination depends on the specific ownership and control facts and should be made with professional review.
Documentation and Business Structure Considerations
Controlled-group treatment has documentation and business-structure implications:
- Entity-level records. Each member's QREs, gross receipts, and other relevant amounts must be documented.
- Group-level aggregation. The group's aggregated amounts must be supportable.
- Allocation records. The allocation of the credit among members must be supportable and consistent with the applicable rules.
- Form 6765 reporting. Members must indicate their controlled-group status on Form 6765 and report their allocated shares.
For more, see our page on R&D tax credit documentation.
A High-Level Illustration
The following is a hypothetical illustration for educational purposes only. It does not represent any actual group and does not state a filing recommendation.
Suppose a controlled group has two members. Member A has QREs of $300,000 and Member B has QREs of $200,000, for a group total of $500,000. The group's credit is computed as if the group were a single taxpayer, using the group's aggregated QREs, gross receipts, and other inputs. If the resulting group credit is $45,500, the credit is allocated between the members based on their proportion of QREs (60% to Member A, 40% to Member B), or as otherwise provided by the applicable rules. Member A reports $27,300 and Member B reports $18,200 on their respective Forms 6765.
This illustration explains the concept, not a specific outcome. The actual allocation depends on the applicable rules and the group's facts.
Questions for Your Tax Professional
- Are my entities members of a controlled group or under common control?
- How are our QREs, gross receipts, and credit aggregated and allocated?
- What records are needed to support the group-level computation and allocation?
- How do we report the allocated credit on our respective Forms 6765?
- How does controlled-group treatment affect our choice between the regular and ASC methods?
Key Takeaway
Under Section 41(f), members of a controlled group or trades or businesses under common control are treated as a single taxpayer for R&D credit purposes. The credit is computed at the group level and allocated among members. Related entities cannot always calculate independently as if unrelated, and the aggregation and allocation rules can be technical. Because controlled-group determination and allocation depend on specific facts, professional tax review is appropriate. For the gross-receipts implications, see our page on gross receipts.