Short answer. You can claim both, but Iowa changed its credit substantially for 2026. For tax years beginning in 2026, Iowa awards a credit of up to 3.5 percent of your Iowa research through an application to the Iowa Economic Development Authority, capped statewide and requiring an independent CPA verification report. Research in 2022 through 2025 used the older credit of 6.5 percent (or 4.55 percent simplified), which was refundable. Either way, you claim the federal Section 41 credit too.
Key facts
| Claim both? | Yes; Iowa requires you to claim the federal credit too |
|---|---|
| Federal rate | 20% regular / 14% ASC |
| Iowa rate | Up to 3.5% for 2026+ (application-based); 6.5% / 4.55% for 2022-2025 |
| Iowa refundable? | Yes (refundable, no longer transferable for 2026+) |
| Forms | Form 6765 (federal) + IEDA application (2026+) or Form IA 128 (2022-2025) |
Two credits, with Iowa newly restructured
Iowa computes its own credit on Iowa expenses; for 2026 it became an application-based, verified program.
The federal Section 41 credit is claimed on Form 6765 with your federal return. Iowa's credit is claimed differently depending on the year: through an application to the Iowa Economic Development Authority for tax years beginning in 2026, or on Form IA 128 for 2022 through 2025. The same research performed in Iowa can support both.
Iowa uses the federal Section 41 definition of qualified research and makes claiming the federal credit a prerequisite, so the federal work is the foundation for the Iowa claim.
Federal Section 41 vs. Iowa, factor by factor
Iowa stays refundable but, for 2026, becomes a capped program that requires an independent CPA verification report.
| Factor | Federal Section 41 | Iowa |
|---|---|---|
| What it is | Credit for increasing research activities | Iowa research activities credit (overhauled for 2026) |
| Credit rate | 20% regular / 14% ASC | Up to 3.5% of Iowa QRE for 2026+ (was 6.5%, or 4.55% simplified, through 2025) |
| Refundable | No - a QSB may offset up to $500,000 of payroll tax under Section 41(h) | Yes, the credit is refundable |
| Carryforward | 20 years, with a 1-year carryback | Not applicable; the credit is refundable |
| Where research must occur | United States | Iowa only |
| How you claim it | Form 6765 with the federal return | Apply to the Iowa Economic Development Authority (2026+); Form IA 128 for 2022-2025 |
| Claim alongside the other? | Yes, on the same underlying QRE | Yes; claiming the federal credit is a prerequisite |
| Documentation | Four-part test and QRE substantiation (Treas. Reg. 1.41-4) | Uses the Section 41 definition, Iowa research only; 2026+ requires an independent CPA verification report |
Where Iowa differs from federal
Iowa changed substantially for 2026, so the answer depends on the year.
A new, capped, verified program for 2026. For tax years beginning in 2026, Iowa replaced its automatic credit with a discretionary program: you apply to the Iowa Economic Development Authority, awards are capped at $40 million statewide and prorated, the rate falls to up to 3.5 percent, and the claim must be supported by an independent CPA verification report. The credit remains refundable but can no longer be transferred.
The prior credit, for 2022 through 2025. Research in those years used Iowa's older credit, 6.5 percent of the Iowa increase over a base or 4.55 percent under a simplified method, which was refundable with the refundable share phasing down over time. Iowa also limits eligibility to certain industries, excluding most service businesses.
One evidence base, now verified
The records that prove the federal claim are what Iowa relies on, and Iowa now requires them to be verified.
Because Iowa uses the federal Section 41 definition and requires you to claim the federal credit, the four-part test analysis and the wage, contractor, and supply records that substantiate your federal credit under Treas. Reg. 1.41-4 support the Iowa claim too. The 2026 program's independent-verification requirement makes that documentation essential rather than optional.
R&D Binder documents the federal Section 41 four-part test and the underlying records that both credits stand on. The Iowa verification, eligibility, and choice of credits remain determinations for your CPA.
More on Iowa's R&D credit
The full state overview, the federal Section 41 work it builds on, and related state guides:
Sources
Every claim on this page traces to a primary authority. Each source below is independent and verifiable.
- Iowa Senate File 657 (research credit program overhaul, 91st General Assembly) - Iowa Legislature
- Iowa Economic Development Authority, Research and Development Tax Credit Program - Iowa Economic Development Authority
- 26 U.S.C. § 41 (credit for increasing research activities) - Cornell Law School, Legal Information Institute
- IRS, About Form 6765 - Internal Revenue Service
- Treas. Reg. § 1.41-4 (recordkeeping and substantiation of qualified research) - Cornell Law School, Legal Information Institute
Get documentation built to survive an exam
R&D Binder produces the federal Section 41 binder and the Iowa state workpaper from one engagement, both built to survive an exam.