Short answer. Section 280C(c) keeps a company from getting a double tax benefit on the same research dollars. By default, claiming the Section 41 credit reduces the research deduction by the amount of the credit. The Section 280C election is the alternative: take a smaller credit and keep the full deduction. Which one comes out ahead depends on the company's tax position, and the election is made on the return.
Why the rule exists
It stops the same research dollar from being rewarded twice at full value.
A company that spends on research can both deduct the cost under Section 174 and claim the Section 41 credit. Section 280C(c) prevents taking the full benefit of both on the same dollars.
The default mechanic is a reduction: when a company claims the research credit, it reduces its Section 174 deduction by the amount of the credit. The credit and the deduction are coordinated, not stacked.
The reduced-credit election
The alternative is to take a smaller credit and keep the full deduction.
Under Section 280C(c)(3), a company can instead elect to claim a reduced credit. The reduced credit equals the regular credit minus an amount tied to the corporate tax rate, which leaves the full Section 174 deduction in place.
Whether the reduced-credit election beats the default depends on the company's tax rate and position. The math, and the choice, belong on the return.
Where the binder fits
Documentation sizes the credit; the election comes after.
The election is only as good as the credit it sizes, and the credit is only as good as the evidence behind it. A well-documented Section 41 claim gives the election something solid to work from.
R&D Binder produces that evidence. It does not make the election or file the return. Your CPA does that, using the credit the binder supports.
Related references
The election is downstream of sizing the credit:
Sources
Every claim on this page traces to a primary authority. Each source below is independent and verifiable.
- 26 U.S.C. § 280C(c), credit and deduction coordination and reduced credit election - Cornell Law School, Legal Information Institute
- 26 U.S.C. § 41, credit for increasing research activities - Cornell Law School, Legal Information Institute
- IRS, Instructions for Form 6765 - Internal Revenue Service
Get documentation built to survive an exam
R&D Binder builds the Section 41 evidence your CPA needs to size the credit: the business components, the four-part test, and the QRE workpaper. The Section 280C election itself is theirs to make.