Maximizing the Michigan R&D Tax Credit: Key Lessons and Preparation Strategies

For over ten years, Michigan stood as one of the few states—and the only one throughout the Midwest—that lacked a research and development (R&D) incentive.

This situation shifted with the enactment of Public Acts 186 and 187 of 2024, which established a refundable R&D credit for tax years beginning on or after January 1, 2025. As the first filing cycle concludes, the data reveals that while the incentive is a valuable tool, it is also highly competitive and unforgiving of administrative errors.

The state’s inaugural run of the program showed intense appetite for tax relief among Michigan’s innovators. On April 24, 2026, the Michigan Department of Treasury announced that total tentative claims for 2025 expenses had exceeded the $100 million annual cap. Because the demand outstripped the available funds, the state was forced to implement proration, leaving many companies with less than they initially anticipated.

According to a detailed analysis by Cohen & Co, the proration process creates a high-stakes environment where accuracy is paramount. Large employers were ultimately granted 50.96% of their tentative claims, while smaller employers—those with fewer than 250 employees—received 59.88%. Because these figures were tied to the accuracy of initial filings, companies that understated their expenses found themselves unable to retroactively increase their claims, effectively leaving money on the table.

The Mechanics of a Competitive Credit

The Michigan credit is structured to reward both base-level research and incremental growth, but it operates under a set of rules that diverge significantly from federal standards. While many businesses are accustomed to the federal R&D credit framework, the state’s program requires a distinct approach. Michigan prohibits the use of statistical sampling to calculate qualifying Michigan expenses, requiring meticulous, granular record-keeping.

The credit is accessible to two primary categories of taxpayers: Corporate Income Tax (CIT) filers and flow-through entities, such as S Corporations, partnerships, and LLCs. This inclusion is vital for Michigan’s economy, as many of the state’s most innovative firms are closely held flow-through entities that previously lacked access to state-level research incentives.

“The lesson from Year 1 is that the credit is real and valuable, but competitive—and the accuracy of the tentative claim directly shapes what a company ultimately receives, Cohen & Co noted in its report.”

For those looking to maximize their returns, the university collaboration provision offers a potential boost. Companies that enter into a written agreement with a Michigan research university can earn an additional 5% credit on those specific collaborative expenses, up to an annual limit of $200,000. The Revenue Administrative Bulletin 2026-4 published by the Treasury outlines these requirements, including the mandatory use of calendar-year figures regardless of a company's fiscal year.

Preparing for the March 2027 Deadline

With the first year’s volatility in mind, the path forward for the 2026 tax year requires early intervention. The most critical constraint is the rigid deadline: tentative claims for 2026 expenses are due March 15, 2027.

The Treasury does not accept late submissions, and because the process is a two-step procedure—requiring an initial tentative filing followed by a final claim on the annual tax return—firms that typically wait for extension deadlines will find themselves out of time.

There is also the matter of legislative alignment. Michigan decoupled from certain federal tax changes in the One Big Beautiful Bill Act (OBBBA), meaning that state-level treatment of R&D expenses does not mirror federal policy.

For many firms, the state credit serves as a necessary offset to these added costs. However, because overstating a claim requires a downward adjustment and understating provides no mechanism for an increase, the initial filing is effectively a one-shot opportunity.

Companies that succeed in this environment will be those that treat documentation as a year-round operational task rather than a year-end accounting chore. By building an R&D study that captures qualifying activities and university collaborations in real-time, firms can ensure their tentative claims are both defensible and optimized before the March 15, 2027, deadline arrives.