FAQS

R&D credits: A crash course in the basics

September 21, 2026

Read time: 8 min

Key takeaways

For companies that invest in innovation, the federal research and development (R&D) tax credit – provided under Section 41 of the Internal Revenue Code – can be a meaningful way to offset the costs of exploring new technical territory. But the rules that govern what qualifies for the credit and how to substantiate a claim are intricate, and getting them wrong can turn a valuable benefit into an IRS dispute.

Here, we supply answers to your questions about the Section 41 research credit.

Section 41 provides a federal income tax credit for increasing research activities. The credit is based on qualified research expenses (QREs) incurred by your company.

To qualify, your company must have performed qualified research, and the expenses claimed must be properly connected to that research. Most examinations turn on these two fundamental points, so qualifying is as much about documentation as it is about the substance of the work itself.

Shawn O'Brien

Partner

Houston

Susan E. Ryba

Partner

Chicago

Edward L. Froelich

Counsel

Washington, DC

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