In addition to the federal R&D tax credit under Section 41, many states offer their own research or R&D incentives. State credits are separate from the federal credit, and their rules can differ materially — in what counts as qualifying research, what expenses are eligible, the credit rate, whether the credit is refundable, where the research must be performed, and what applications or deadlines apply. This page explains the general landscape. It is educational and is not individualized advice. Taxpayers should check the current rules for the specific state and tax year. For the federal credit, see our page on what the R&D tax credit is.
State R&D Credits in Plain English
A state R&D credit is a separate incentive established by state law. A taxpayer that claims a federal R&D credit may also be able to claim a state credit, but the two are not automatically the same. Each state's credit has its own statute, its own definitions, and its own administrative rules. Some states have no R&D credit at all. Whether a state credit applies, and how much, depends on the state's current law and the taxpayer's facts.
Federal Credit vs. State Credits
The federal credit is established by Section 41 of the Internal Revenue Code and is administered by the IRS through Form 6765. State credits are established by state statutes and are administered by state revenue or tax agencies. A taxpayer may need to file separate state forms and meet state-specific requirements. Qualifying for the federal credit does not automatically qualify a taxpayer for a state credit, and vice versa.
Why State Rules Differ
States adopt different policy choices. Some states base their credit on the federal qualified-research-expense definition; others use modified or wholly different definitions. States may use different base-period computations, different credit rates, different expense categories, and different limitations. Some states require the research to be performed within the state. Because these choices vary, a federal credit analysis is not a substitute for a state-specific analysis.
Location of Research
Some states require that qualifying research be performed within the state, or that a portion of the research occur in-state. This can matter for taxpayers with research activities in multiple states. The federal foreign-research exclusion (which excludes research outside the United States) is a separate issue from any in-state requirement a state may impose. For more, see our page on research outside the United States.
Examples of State Approaches
A small number of illustrative examples follow. These are summaries of publicly available state agency guidance, not a complete or current statement of any state's law, and state rules change over time.
- California. The California Franchise Tax Board administers a research credit, claimed on Form FTB 3523. According to the FTB, the credit is 15 percent of qualified research expenses that exceed a base amount, with the base amount defined by reference to Section 41(e) of the Internal Revenue Code and Section 23609 of the California Revenue and Taxation Code. California's rules differ from the federal rules in several respects, and the FTB's current form instructions are the authoritative reference for a given tax year.
Other states have their own credits with their own rules. This page does not attempt to summarize all of them. Taxpayers should consult the current guidance of the relevant state revenue or tax agency.
Applications and Deadlines
Some states require an application, certification, or precertification before a credit can be claimed, and some impose deadlines that differ from federal deadlines. Missing a state application or deadline can affect eligibility for that state's credit. These requirements are state-specific and can change, so taxpayers should verify the current requirements with the relevant state agency.
Documentation
States may have their own documentation requirements, which can differ from what supports a federal credit claim. Records that connect activities, costs, and business components — and that address state-specific definitions or location requirements — may be needed. For the general documentation concepts, see our page on R&D tax credit documentation.
Using Federal R&D Records for State Review
Records prepared for a federal R&D credit claim can sometimes support a state credit analysis, but they may need to be adapted — for example, to reflect state-specific definitions, in-state location requirements, or different expense categories. Federal records are a starting point, not a guarantee that a state credit applies.
Always Check Current State Rules
State tax rules change over time. Credit rates, definitions, applications, deadlines, and refundability can change from year to year. Taxpayers should check the current rules of the specific state and tax year, ideally with professional review. This page does not state current rules for any particular state beyond the illustrative example above, and that example should be verified against the agency's current guidance.
Key Takeaway
Some states offer their own R&D credits, and the rules can differ materially from the federal credit — in definitions, eligible expenses, rates, refundability, location, applications, and deadlines. A federal credit analysis is not a substitute for a state-specific analysis, and taxpayers should check the current rules for the specific state and tax year. Because state rules are fact- and jurisdiction-specific, professional review is appropriate.