Analysis of the Michigan Research and Development Tax Credit: Refundability, Statutory Framework, and Administrative Guidance

A refundable credit for excess over tax liability represents a statutory mechanism where the state pays the taxpayer the remaining value of a credit if its amount exceeds their total tax obligation. In the context of the Michigan Research and Development (R&D) tax credit, this ensures that innovative firms receive immediate liquidity through a cash refund even when they have no current tax liability.

The reintroduction of the Michigan Research and Development tax credit through Public Acts 186 and 187 of 2024 marks a transformative period for the state’s fiscal policy and economic development strategy. Historically, Michigan has fluctuated in its approach to incentivizing innovation, moving from the broad credits available under the Michigan Business Tax (MBT) to a more restrictive environment following the 2011 shift to the Corporate Income Tax (CIT).1 The current legislation, signed into law on January 13, 2025, by Governor Gretchen Whitmer, explicitly addresses the capital needs of the state’s high-growth industries by offering a refundable credit against the CIT and withholding tax for flow-through entities.1 This refundable nature is particularly critical because it transforms a standard tax offset into a direct investment tool, allowing companies—especially pre-revenue startups and cyclical manufacturers—to access non-dilutive capital based on their research expenditures rather than their profitability.6

The Statutory Genesis of the Michigan R&D Incentive

The legislative package that forms the basis of the new R&D credit consists of two primary vehicles: House Bill 5100 (Public Act 186) and House Bill 5101 (Public Act 187). These acts are supported by a suite of companion bills—HB 4368, HB 5099, and HB 5102—which clarify definitions and reporting requirements necessary for a robust administrative framework.4 For tax years beginning on or after January 1, 2025, these laws establish a tiered system of credits designed to reward businesses for conducting qualified research within the state’s borders.1

The primary motivation for this legislation was to restore Michigan’s competitive standing relative to other Midwestern states. For over a decade, Michigan lacked a standalone R&D credit, while neighbors like Wisconsin and Indiana maintained aggressive incentives to attract talent and capital in the automotive, aerospace, and life sciences sectors.8 By aligning the state’s definitions of qualified research with the federal standards found in Internal Revenue Code (IRC) Section 41(b), the Michigan Legislature has simplified the compliance process for taxpayers while ensuring that only high-value, technologically rigorous activities are subsidized.12

Mechanics of the Refundable Credit for Excess over Tax Liability

To understand the practical impact of the Michigan R&D credit, one must distinguish between nonrefundable and refundable tax credits. A nonrefundable credit can reduce a taxpayer’s liability to zero but provides no benefit beyond that point, often requiring the taxpayer to carry the excess forward into future years where it may or may not be utilized.6 In contrast, the Michigan R&D credit is fully refundable.1

Under the specific guidance of Public Act 186, Section 677(5), if the amount of the credit allowed exceeds the taxpayer’s tax liability for the year, the portion of the credit that exceeds the liability must be refunded.14 This is a critical distinction for the “authorized business” classification. For a corporation paying CIT, the credit first wipes out its state income tax debt. If the credit is $\$500,000$ and the tax due is $\$100,000$, the state issues a refund check for the remaining $\$400,000$.3 This refundability is not merely an accounting preference; it is a deliberate policy tool intended to provide liquidity to companies that are reinvesting every dollar of revenue—and more—back into product development.6

The interaction with other credits is also strictly defined. The R&D credit must be claimed after all other allowable nonrefundable credits have been applied.5 This sequencing ensures that the taxpayer maximizes their nonrefundable benefits first, preserving the refundable R&D credit to either cover any remaining liability or be returned as cash.17

Eligibility and the Scope of Qualified Research Expenses (MQREs)

To be eligible for the credit, an entity must qualify as an “authorized business.” This includes traditional C-corporations, insurance companies, financial institutions, and unitary business groups (UBGs).5 Furthermore, Public Act 187 extends eligibility to flow-through entities (FTEs) such as S-corporations, partnerships, and LLCs not taxed as corporations, provided they are employers subject to Michigan income tax withholding.10

The foundation of the credit calculation rests on “Michigan Qualified Research Expenses” (MQREs). While Michigan heavily references federal IRC Section 41(b), it imposes a strict geographic limitation: the research must be conducted in Michigan.5 Expenses incurred for research conducted outside the state cannot be used to calculate the credit or to determine the three-year base amount.10

The Four-Part Test for Research Activities

To ensure that the credit supports legitimate innovation, Michigan utilizes the federal “Four-Part Test” to define qualified research activities.8 Every project for which a credit is claimed must meet all four of these criteria:

1. Section 174 Test: The expenditures must be eligible for treatment as research or experimental expenditures under IRC Section 174, meaning the activities are intended to discover information that would eliminate uncertainty concerning the development or improvement of a business component.13
2. Technological Nature Test: The process of experimentation must rely on the principles of physical or biological sciences, engineering, or computer science.13
3. Business Component Test: The research must be intended to discover information used to develop a new or improved business component, defined as a product, process, software, technique, formula, or invention to be held for sale, lease, or license, or used in the taxpayer’s trade or business.12
4. Process of Experimentation Test: Substantially all of the activities must constitute a process of experimentation for a purpose related to a new or improved function, performance, reliability, or quality.13

Categories of Eligible Expenditures

Within the geographic boundaries of Michigan, the following costs are generally recognized as MQREs:

• Wages: Payments made to employees directly engaged in research, or those who directly supervise or support such research.3 The definition of an employee for this purpose aligns with federal withholding standards under IRC Section 3401(a).2
• Supplies: Tangible personal property, other than land or depreciable property, that is consumed during the research process.3
• Contract Research: A percentage of amounts paid to third-party organizations to perform research on the taxpayer’s behalf within Michigan.3
• Computer Access: Expenses paid for the right to use computers in the conduct of qualified research.13

Tiered Credit Rates and Employer Size Classification

Michigan’s R&D credit is unique in its tiered structure, which provides different levels of benefit based on the size of the employer. This reflects a policy desire to provide a more robust “safety net” for smaller, more vulnerable businesses while still offering significant incentives for large-scale industrial projects.1

Small Businesses (Fewer than 250 Employees)

For businesses with fewer than 250 employees, the credit is particularly aggressive. These entities are eligible for a two-pronged credit calculation:

1. Base Layer: 3% of MQREs up to the base amount.14
2. Excess Layer: 15% of MQREs that exceed the base amount.14
3. Maximum Annual Credit: Capped at $\$250,000$ per taxpayer.17

Large Businesses (250 or More Employees)

Large businesses, defined as those with 250 or more employees, follow a similar structure but with a lower rate for expenses exceeding the base:

1. Base Layer: 3% of MQREs up to the base amount.14
2. Excess Layer: 10% of MQREs that exceed the base amount.2
3. Maximum Annual Credit: Capped at $\$2,000,000$ per taxpayer.5

Employee Counting Rules

The Michigan Department of Treasury has clarified that for the purposes of this classification, “employees” include all individuals for whom the employer is required to withhold federal income tax.2 The count is not limited to those performing research but includes the entire workforce of the authorized business.13 For Unitary Business Groups (UBGs), the employee count and all subsequent credit calculations are performed at the group level rather than for each individual subsidiary.2

Calculating the Base Amount

The “base amount” is the threshold that separates the 3% credit rate from the 10% or 15% rate. It is designed to reward companies for increasing their research intensity rather than simply maintaining a status quo of spending.6

The Standard Three-Year Average

Statutorily, the base amount is the average annual amount of MQREs incurred during the three calendar years immediately preceding the calendar year for which the credit is claimed.2

In mathematical terms, for a credit claimed for the 2025 expense year, the base amount ($B_{2025}$) is calculated as follows:

$$B_{2025} = \frac{MQRE_{2022} + MQRE_{2023} + MQRE_{2024}}{3}$$

Adjustments for New or Emerging Businesses

The legislation accounts for businesses that may not have a full three-year history of research in Michigan. If a business has no prior qualifying R&D expenses, the base amount is zero, allowing the entire current-year expenditure to be potentially eligible for the higher marginal rate.7

If the business has incurred expenses in only one or two of the preceding three years, the average is calculated based only on those specific years.2 For example, a company that began research operations in Michigan in 2024 with $\$200,000$ in expenses would use $\$200,000$ as its base amount for 2025, rather than averaging it with two years of zeros.2

The Calendar-Year Mandate for Fiscal Filers

A significant administrative hurdle exists for taxpayers who do not operate on a calendar-year basis. Michigan law requires that MQREs and base amounts be calculated using calendar-year data (January 1 to December 31), regardless of the taxpayer’s fiscal year-end.2 The Treasury Department is developing an optional conversion method for fiscal-year filers to translate their historical accounting data into calendar-year chunks for the purposes of establishing an accurate base amount for years prior to 2025.2

University Collaboration Bonus Credit

To further incentivize the integration of Michigan’s academic expertise into the private sector, the law provides an additional 5% credit for MQREs incurred through collaboration with a Michigan research university.1 This bonus is available to both large and small businesses and is calculated on the portion of research expenses specifically tied to the partnership.1

This collaboration bonus is subject to its own annual cap of $\$200,000$ per taxpayer.1 To claim this bonus, the taxpayer must have a formal written agreement with the university and be prepared to provide a copy to the Treasury Department upon request.1 A “research university” is defined as a public university in Michigan classified as a doctoral university with very high research activity by the Carnegie Classification of Institutions of Higher Education.4

State Revenue Office Guidance: The Claims Process

The Michigan Department of Treasury is responsible for the administration of the R&D credit, and its guidance has established a rigorous timeline that taxpayers must follow to ensure eligibility. Because the state has set an aggregate annual cap of $\$100$ million for all R&D credits, a “tentative claim” system is necessary to manage the allocation of these funds.10

Step 1: Submission of the Tentative Claim

The tentative claim is the first statutory step in securing the credit. It is not part of the annual tax return but is a separate application filed through the Michigan Treasury Online (MTO) portal.13

• For 2025 Expenses: The tentative claim must be submitted by April 1, 2026.1
• For Subsequent Years: The deadline moves to March 15 of the following year.4

The tentative claim must report actual expenditures incurred during the previous calendar year.2 Treasury has emphasized that estimated expenses are not permitted, as these figures are used for the final proration calculation.2

Step 2: Treasury Review and Proration Notice

Once the tentative claim deadline has passed, the Treasury Department reviews the aggregate volume of claims. If the total unadjusted credit amount exceeds $\$100$ million, a statutory proration mechanism is triggered.10

The state reserves $\$25$ million of the cap specifically for small businesses.3 If the total claims from small businesses do not exceed this amount, they are not prorated.4 If they do exceed it, each small business’s credit is reduced proportionally.4 Large businesses share the remaining $\$75$ million (or less, if small business claims were below their set-aside) on a pro-rata basis.4 If small business claims are so high that they exceed 25% of all claims, the Treasury may prorate all businesses together.4

Treasury expects to publish a general notice on its website by April 30 each year, indicating the proration factor applied to that year’s claims.2 This notice will not contain taxpayer-specific information but will provide the mathematical factor necessary for taxpayers to adjust their final credit amount.2

Step 3: Filing the Final Claim on the Annual Return

Only after the proration notice is published can the taxpayer officially claim the adjusted credit on their annual return.2

• CIT Filers: The credit is claimed on the annual CIT return for the same tax year for which the credit is sought (e.g., the 2025 return filed in 2026).10
• Flow-Through Entities: The credit is claimed on the annual sales, use, and withholding return (Form 165) for the year in which the tentative claim was filed.18

Because the proration notice is issued close to the CIT filing deadline (April 30), many corporate taxpayers are encouraged to file for an extension to avoid the need for amended returns.2

Illustrative Example: The Refundable Credit in Practice

Consider a mid-sized Michigan engineering firm, “Great Lakes Robotics LLC,” which operates as a flow-through entity and has 120 employees. In 2025, the firm substantially increases its R&D budget to develop a new autonomous manufacturing system.

Great Lakes Robotics Data (2025):

• 2025 MQREs: $\$1,000,000$.
• 2022 MQREs: $\$400,000$.
• 2023 MQREs: $\$500,000$.
• 2024 MQREs: $\$600,000$.
• 2025 Withholding Tax Liability: $\$30,000$.

Step 1: Calculate the Base Amount

The base amount is the average of the prior three years:

$$\text{Base Amount} = \frac{400,000 + 500,000 + 600,000}{3} = \$500,000$$

Step 2: Calculate the Unadjusted Credit

As a small business (under 250 employees), the firm uses the 3% and 15% rates:

• 3% of expenses up to the base: $\$500,000 \times 0.03 = \$15,000$.
• 15% of expenses above the base: $(\$1,000,000 – \$500,000) \times 0.15 = \$75,000$.
• Total Unadjusted Credit: $\$15,000 + \$75,000 = \$90,000$.

Step 3: Account for Proration

The firm submits its tentative claim by April 1, 2026. On April 30, 2026, the Treasury publishes a notice that the small business pool was oversubscribed and a proration factor of 0.90 is applied.

• Adjusted Credit: $\$90,000 \times 0.90 = \$81,000$.

Step 4: Application of Refundability

The firm applies the credit against its withholding tax liability:

• Tax Liability Offset: The first $\$30,000$ of the credit reduces the tax liability to zero.
• Excess over Tax Liability: $\$81,000 – \$30,000 = \$51,000$.
• The Refund: The State of Michigan issues a cash refund check of $$51,000 to Great Lakes Robotics LLC.3

The Strategic Importance of IRC Section 174 Decoupling

A critical nuance in Michigan’s tax landscape is the state’s recent decoupling from the federal treatment of R&D expenses under IRC Section 174. This decoupling significantly increases the value and necessity of the Michigan R&D tax credit.7

The Amortization Trap

At the federal level, the Tax Cuts and Jobs Act of 2017 mandated that starting in 2022, R&D expenses could no longer be deducted immediately (expensed) but must be capitalized and amortized over five years for domestic research.6 Although federal law in 2025 moved to restore immediate expensing, Michigan enacted Public Act 118 of 2024 (HB 4961), which specifically decoupled the state from federal expensing rules.7

Consequently, for Michigan tax purposes, businesses must still amortize their research costs over five years. This requirement creates a timing mismatch that often leads to higher taxable income and increased tax liability in the early years of a project.7

The Credit as a Liquidity Bridge

The refundable R&D tax credit acts as a vital counterbalance to this amortization requirement. While the five-year amortization rule effectively drains cash from a business in the short term by increasing its tax bill, the refundable credit provides an immediate cash injection.7 For many taxpayers, the credit amount will roughly approximate the tax increase caused by amortization, effectively restoring the “immediate expensing” benefit through the credit mechanism rather than the deduction mechanism.18

Fiscal Impact and Economic Outlook

The Michigan Senate Fiscal Agency and the House Fiscal Agency have provided detailed projections on the fiscal impact of the R&D credit program. The consensus is that the program will result in a reduction of state revenue by approximately $\$100$ million per tax year, primarily affecting the General Fund.25

Revenue Distribution and Fund Impacts

The loss of revenue is expected to be concentrated in the General Fund, but credits claimed by employers against income tax withholding could also reduce revenue to the School Aid Fund (SAF).25 Currently, approximately 23.8% of gross income tax withholding is directed to the SAF.25 Whether the R&D credit refunds will be drawn entirely from the General Fund or proportionally from both funds remains a subject of ongoing administrative determination.25

Administrative Costs of Oversight

Managing a $\$100$ million annual credit pool requires significant oversight. The Michigan Strategic Fund (MSF) is authorized to charge an administrative fee of up to 5% of the credit amount to cover the costs of staffing and IT systems necessary for the tentative claim portal and annual reporting.25 If the full 5% fee is applied, it could provide up to $\$5$ million annually for program administration.25

Long-Term Economic Incentives

The ultimate goal of the credit is to foster an ecosystem of innovation. By incentivizing R&D, Michigan aims to attract high-tech industries, create high-paying jobs, and strengthen ties between private industry and the state’s world-class research universities.1 Statistics suggest that states with robust R&D incentives see higher rates of patent filings and a more resilient manufacturing base.6

Compliance and Audit Defense for R&D Claims

Because the R&D credit is refundable, it is a high-profile target for audits by the Michigan Department of Treasury. Taxpayers must be prepared to defend their claims with contemporary, detailed documentation.12

Essential Documentation Requirements

To survive an audit, a business must maintain records for at least four years following the filing of the return.12 These records should include:

• Project Lists: A comprehensive list of all R&D projects conducted during the year, mapped to the four-part test.12
• Nexus Documentation: Records that explicitly link specific employee hours and supply costs to specific research projects.12
• Payroll Records: Documentation showing the total wages paid to each employee involved in research, ensuring that only Michigan-sourced wages are included.13
• Third-Party Contracts: For contract research, copies of agreements and proof of payment, as well as evidence that the research was performed in Michigan.12

The Risk of Statistical Sampling

While federal IRS rules sometimes allow for statistical sampling to estimate R&D expenses, the Michigan Department of Treasury has indicated that it does not currently permit statistical sampling for reporting MQREs.13 All reported values on the tentative and final claims must be final and accurate, reflecting the actual expenditures incurred by the authorized business.13

Unitary Business Groups (UBGs) and Complex Structures

For businesses operating under complex corporate structures, the Michigan R&D credit introduces specific grouping rules. A Unitary Business Group (UBG) is treated as a single taxpayer under the Michigan CIT.10

Group-Level Calculations

The UBG, rather than each individual member, must file the tentative claim and the final credit claim.2 The following variables are determined at the group level:

• Employee Count: The total employees of all members are summed to determine if the UBG is a “small” or “large” business.10
• Base Amount: The aggregate MQREs of all members over the prior three years form the group’s base amount.10
• Credit Caps: The $\$250,000$ or $\$2,000,000$ cap applies to the entire UBG.2

This grouping rule prevents large corporations from splitting into multiple small subsidiaries to capture multiple $\$250,000$ caps at the 15% rate.2 It also ensures that the state’s fiscal exposure to a single economic interest is strictly limited.25

Common Pitfalls and Administrative Deadlines

The most common reason for credit denial in similar state programs is the failure to meet administrative deadlines or the failure to provide adequate geographic substantiation.

The “Dead-End” for Late Tentative Claims

The Treasury has been unambiguous: “Treasury will not accept tentative claims after the statutory deadline”.2 Because the tentative claim is used to calculate proration for the entire state, allowing late entries would disrupt the mathematical certainty required for the April 30 proration notice.2 A taxpayer who misses the April 1, 2026, deadline for 2025 expenses will be permanently barred from claiming that credit, even if they later file an accurate annual return.2

Disregarded Entities and FTE Restrictions

Special care must be taken with certain entity types. For instance, disregarded entities for federal tax purposes are generally not eligible for the Michigan R&D credit in their own right; they must be included in the return of their owner.7 Furthermore, members or partners of a flow-through entity that claims the credit are explicitly barred from claiming any portion of that same credit on their individual income tax returns.4 The benefit stays at the entity level, primarily utilized against the entity’s withholding obligations.4

Comparison with Neighboring States: The Michigan Advantage

By offering full refundability and a 15% rate for small business excess expenses, Michigan has leapfrogged several neighboring jurisdictions in the quality of its R&D incentive package.11

The Wisconsin R&D credit, for example, only allows up to 25% of the credit to be refundable, meaning a company with no tax liability could wait up to 15 years to fully realize the value of their research.11 Michigan’s policy of providing immediate, 100% refundability (subject to proration) is a massive competitive advantage for attracting early-stage venture capital investment, where “burn rate” and “runway” are the primary metrics of success.6

Guidance on Short Taxable Years and Base Periods

The Treasury Department’s responses to stakeholder comments in early 2025 provided clarity on several technical edge cases. For instance, short taxable years (resulting from a change in accounting period or a corporate acquisition) will be treated as full years for the purposes of the base amount calculation, and no annualization of expenses is required.7

Additionally, if a taxpayer was not in existence for the entire three-year base period, they only average the years in which they were in existence.2 This prevents new companies from being penalized with a “zero-year” average that might artificially inflate their base if they had one massive year of spending and two years of non-existence.2

Conclusion: Navigating the New Frontier of Innovation

The Michigan Research and Development tax credit represents a bold and necessary reinvestment in the state’s industrial and technological future. By establishing a refundable credit, the state has recognized that innovation is a high-risk, high-cost endeavor that often precedes profitability.1 The refundability mechanism effectively provides a state-backed subsidy for R&D, lowering the barrier to entry for startups and providing essential cash flow for established manufacturers to modernize their operations.6

However, the complexity of the administrative process—particularly the tentative claim requirement and the calendar-year reporting mandate—requires meticulous planning and robust documentation systems.10 Taxpayers must not only identify their qualified research but must also track it geographically within Michigan and be prepared to submit actual data well before their annual tax returns are due.2

As Michigan decouples from federal R&D expensing, this credit becomes the primary tool for mitigating the tax burden of innovation.7 For businesses that successfully navigate the “Four-Part Test” and the MTO portal deadlines, the Michigan R&D credit offers a powerful engine for growth, ensuring that the state remains a premier destination for the creators and engineers of the future.1

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