The Nexus of Innovation and Administration: Public Act 148 of 2022 and the Michigan Research and Development Tax Credit Framework

Public Act 148 of 2022 establishes the procedural requirements for partnerships to report federal tax adjustments to the Michigan Department of Treasury, ensuring state tax liabilities reflect federal audit outcomes. Within the broader tax landscape, this act provides the administrative mechanism for reconciling research and development expenditures when federal audits modify the qualified research expenses used to claim Michigan’s newly reintroduced R&D tax credit.1

The enactment of Public Act 148 of 2022 represents a sophisticated evolution in Michigan’s tax administration, specifically targeting the complexities inherent in the federal centralized partnership audit regime. By amending the Income Tax Act of 1967 and adding a dedicated Chapter 18, the Michigan legislature has sought to align state reporting with the modern federal approach to flow-through entity examinations.2 While Public Act 148 serves as the “administrative backbone” for reporting changes to tax attributes, Public Acts 186 and 187 of 2024 function as the “economic engine,” reintroducing a robust, state-level Research and Development (R&D) tax credit effective for tax years beginning on or after January 1, 2025.4 For enterprises operating as flow-through entities, the intersection of these legislative movements is critical: the 2024 acts define the substance of the credit and the eligibility of the activities, whereas the 2022 act dictates the procedural mandate for adjusting those claims if the federal underlying data is altered by the Internal Revenue Service (IRS).2 This integrated framework ensures that Michigan’s tax incentives are both globally competitive and administratively rigorous, providing a stable environment for long-term investment in technological advancement.6

The Legislative Genesis of Procedural Reform in Michigan

The introduction of Public Act 148 of 2022 was not an isolated event but rather a calculated response to the federal Bipartisan Budget Act of 2015, which fundamentally altered how the IRS audits partnerships. Before this shift, federal adjustments were handled at the individual partner level, creating a logistical nightmare for state revenue offices attempting to track and collect tax on adjusted income.2 Public Act 148 streamlines this by mandating a single “State Partnership Representative” with the sole authority to act on behalf of the partnership in state tax matters.2 This centralization is vital for the Michigan R&D credit because the credit is claimed at the entity level for flow-throughs, rather than being passed through to owners.7

Historically, Michigan’s business tax climate has undergone several radical shifts. The state utilized the Single Business Tax (SBT) from 1976 until 2007, which included an R&D credit.5 This was followed by the Michigan Business Tax (MBT), which also supported research incentives. However, when the Corporate Income Tax (CIT) was established in 2012, many of these credits were eliminated to simplify the tax code.5 The subsequent decade saw a decline in Michigan’s relative competitiveness for high-tech manufacturing compared to states like Ohio or Indiana that maintained robust R&D incentives.5 Public Act 148 of 2022 and the subsequent R&D credit acts are part of a bipartisan “bold step forward” to restore Michigan as a hub for innovation, particularly in the automotive and semiconductor sectors.4

Structural Analysis of Public Act 148 of 2022

The core of Public Act 148 is the requirement for partnerships to report federal adjustments—defined as any change to an item or amount under the Internal Revenue Code (IRC) used to compute state tax—within 180 days of a “final determination date”.2 This reporting requirement is all-encompassing, covering changes from IRS audits, amended federal returns, or administrative adjustment requests.2 For a business claiming the Michigan R&D credit, any federal audit that disqualifies a research project or reclassifies “qualified research expenses” (QREs) as standard business expenses directly impacts the state credit amount, as the Michigan credit is strictly tied to the federal definition of QREs found in IRC Section 41(b).4

The Role of the State Partnership Representative

Under Public Act 148, the “state partnership representative” is the entity’s federal partnership representative unless a different person is designated in writing.2 This individual has the sole authority to:

1. Sign agreements and waivers on behalf of the partnership.
2. File the “federal adjustments report” (which can take the form of an amended return or a specific Treasury form).
3. Make elections regarding how the adjustment is paid—either at the entity level or by “pushing out” the adjustment to partners.2

The implications for R&D tax planning are profound. Since the Michigan R&D credit is refundable and entity-level for flow-throughs, the state partnership representative must ensure that any reduction in federal QREs is accurately reflected in a modified state R&D claim to avoid penalties and interest for the underpayment of tax.2

Reporting Timelines and Compliance Vouchers

Compliance with Public Act 148 is facilitated through the Michigan Department of Treasury’s specific forms, most notably Form 5839, the “Partnership Adjustments Payment Voucher”.1 This voucher is utilized to remit payments for taxes, penalties, and interest resulting from a federal audit.1 The law holds taxpayers harmless for penalties and interest if the reporting and payment requirements are met within the statutory windows.2

The Reintroduction of the Michigan R&D Tax Credit

While Public Act 148 addresses the aftermath of audits, Public Acts 186 and 187 of 2024 provide the proactive incentive. Effective for tax years beginning on or after January 1, 2025, Michigan now offers a refundable credit for increasing research activities within the state.4 This credit is a “game-changer” for businesses that have struggled with the federal requirement to amortize R&D expenses under the 2017 Tax Cuts and Jobs Act.4 Michigan has officially decoupled from certain federal provisions, allowing the state credit to serve as immediate liquidity for companies engaged in cutting-edge work.4

Eligibility and “Authorized Businesses”

The credit is available to “authorized businesses,” which are defined as Corporate Income Tax (CIT) taxpayers and certain flow-through entities (FTEs) that are subject to Michigan income tax withholding but not the MBT.7 It is important to note that “disregarded entities” are not eligible for the R&D credit as independent claimants; their expenses must be aggregated with their owner’s return.4

The credit structure is segmented by the size of the business, as measured by total employee count (using the IRC Section 3401(c) definition).7 This segmentation ensures that the state’s $100 million annual funding pool is distributed equitably between large industrial leaders and small, agile startups.8

Sources: 4

Definition of Qualified Research Expenses (QREs)

The Michigan Department of Treasury has clarified in its “Notice Regarding New Research and Development Credit” that the state only adopts the definition of “qualified research expenses” from IRC Section 41(b).7 Taxpayers should not apply other federal concepts or regulations unless they are specifically incorporated into the Michigan Income Tax Act.7

Critically, the research must be conducted physically in Michigan.4 This geographical restriction is a primary focus for state revenue office guidance. Expenses for research conducted outside the state cannot be used to calculate the credit amount or the “base amount” for eligibility.7 This includes:

• Wages: Salaries paid to employees directly performing, supervising, or supporting R&D while in Michigan.6
• Supplies: Materials, prototypes, and raw materials consumed in Michigan-based experimentation.6
• Contract Research: Payments to third parties for research conducted on the taxpayer’s behalf within the state.10
• Cloud Computing: Expenditures for rental of off-site or cloud-based server space used specifically for the design or testing of new software in Michigan.6

Calculation Methodology and the “Base Amount”

The Michigan credit is designed to reward incremental increases in research spending. This is achieved by comparing current-year QREs to a “base amount,” which is defined as the average annual amount of qualifying research and development expenses incurred during the three calendar years immediately preceding the calendar year for which the credit is claimed.4

A significant administrative insight provided by Treasury is that all claimants—including fiscal-year filers—must calculate their base amount and current-year QREs on a calendar-year basis.7 This requires companies with a non-calendar tax year to perform a separate accounting of their R&D spend to align with the state’s January-to-December reporting requirement.11

Base Amount Variations

The Treasury’s guidance explains how to handle businesses with shorter histories or inconsistent research activities 4:

• Less than 3 years of QREs: If a taxpayer has only one or two years of qualifying expenses in the base period, the average is calculated using only those years.4
• No prior QREs: If a business has never conducted R&D in Michigan, the base amount is zero, allowing them to claim the full 15% (small) or 10% (large) rate on their entire current-year spend.4
• Short Taxable Years: These are treated as full years for the purpose of the base amount calculation, and no annualization of expenses is required.4

An unusual provision in the legislation, which some tax experts view as a potential drafting error, suggests that if a taxpayer had R&D expenses in only one year of the three-year base period, that single year’s amount becomes the base, rather than dividing the total by three.11 For example, if a company spent $90,000 in 2024 and $0 in 2022 and 2023, the base amount for a 2025 claim might be $90,000 instead of $30,000. This reinforces the need for businesses to track their expenses meticulously even during years when the credit was not available.11

The University Collaboration Bonus: A Strategic Incentive

To strengthen the ties between the state’s research institutions and the private sector, Michigan offers an additional 5% credit on QREs incurred through collaboration with an eligible Michigan research university.4 This bonus is available to both large and small businesses and is capped at $200,000 annually per taxpayer.8

To qualify, there must be a formal “written agreement” between the business and the university.8 Eligible universities include public institutions described in the State Constitution (such as U-M, MSU, and Wayne State) as well as independent nonprofit colleges in Michigan.9 This bonus is added to the unadjusted credit calculation before the application of the $250,000 or $2 million per-taxpayer caps.8

Administrative Procedures and the “Tentative Claim”

The most distinctive feature of Michigan’s R&D credit is the requirement to file a “tentative claim” before claiming the credit on an annual tax return.8 This process allows the Department of Treasury to manage the $100 million statewide cap.

Filing Deadlines and MTO Requirements

For R&D expenses incurred during the 2025 calendar year, all claimants must submit their tentative claims by April 1, 2026.4 For expenses incurred in 2026 and subsequent years, the deadline moves to March 15 of the following year.4

The Treasury is currently upgrading its SAP ECC and Michigan Treasury Online (MTO) systems to support this process.19 Taxpayers will file the tentative claim through MTO Guest Services, which will allow for the upload of supporting documentation.19 These claims must be based on actual, not estimated, expenses.12 The Treasury will not accept amended tentative claims after the deadline because these figures are used to calculate the statewide proration.12

Statewide Caps and Proration Logic

The total amount of credits issued across the state is limited to $100 million per calendar year.4 If the aggregate unadjusted claims exceed this limit, a proration mechanism is triggered to reduce the allowed credit for each claimant.4

The proration follows a tiered structure:

• Small Business Allocation: $25 million is reserved for businesses with fewer than 250 employees.4 If total small business claims are $25 million or less, they are not prorated, even if the total statewide demand exceeds $100 million.8 If small business claims exceed $25 million, they are prorated to stay within that $25 million pool.8
• Large Business Allocation: $75 million (or the remaining portion of the $100 million pool) is allocated to businesses with 250 or more employees.6 Large business claims are prorated if their aggregate total exceeds the available portion of the pool.8

The Department of Treasury anticipates publishing a general notice on its website by April 30 of each year, notifying taxpayers whether adjustments to tentative claims are required.11 This notice will specify whether proration is required for each category of claimant but will not contain taxpayer-specific details.12

Comprehensive Example: Calculating the Michigan R&D Credit

To demonstrate the application of these rules, consider “Innovation Corp,” a Michigan-based technology firm with 180 employees.

Innovation Corp Profile (2025 Tax Year)

• Total Michigan QREs (2025): $1,200,000
• University Collaboration Expenses (included): $300,000 (with U-M)
• 2022 Michigan QREs: $400,000
• 2023 Michigan QREs: $500,000
• 2024 Michigan QREs: $600,000

Step 1: Calculate the Base Amount

The base amount is the average of the three preceding years 7:

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

Step 2: Determine Excess QREs

$$\text{Excess QREs} = \text{Current QREs} – \text{Base Amount} = \$1,200,000 – \$500,000 = \$700,000$$

Step 3: Apply the Rates (Small Business < 250 Employees)

• Credit on Base (3%): $\$500,000 \times 0.03 = \$15,000$
• Credit on Excess (15%): $\$700,000 \times 0.15 = \$105,000$
• University Bonus (5% of University QREs): $\$300,000 \times 0.05 = \$15,000$
• Total Unadjusted Credit: $\$15,000 + \$105,000 + \$15,000 = \$135,000$

Step 4: Verify Against Per-Taxpayer Cap

The unadjusted credit of $135,000 is below the $250,000 cap for small businesses.4 Innovation Corp will file a tentative claim for $135,000 by April 1, 2026.

Step 5: Final Adjustment (Hypothetical Proration)

If the Department of Treasury determines that total small business claims reach $50 million, a proration factor of 0.50 ($25M pool / $50M demand) would be applied:

$$\text{Final Refundable Credit} = \$135,000 \times 0.50 = \$67,500$$

Intersection of PA 148 of 2022 and the R&D Credit

The synergy between the procedural mandates of Public Act 148 and the substantive R&D credit becomes apparent in the event of an audit. Consider a scenario where “Innovation Corp” (from the example above) is audited by the IRS in 2027. The IRS determines that $200,000 of the “qualified” research expenses reported in 2025 were actually standard maintenance costs.

Under Public Act 148 of 2022:

1. Reporting Requirement: Within 180 days of the final determination, Innovation Corp’s state partnership representative must file a federal adjustments report with the Michigan Treasury.2
2. Credit Recalculation: The 2025 Michigan QREs would be reduced from $1.2 million to $1.0 million. This recalculation would affect the “excess QRE” portion of the credit and potentially the “university bonus” if those were the expenses disqualified.
3. Liability and Payment: The reduced credit would result in a higher tax liability for 2025. Innovation Corp would use Form 5839 (Partnership Adjustments Payment Voucher) to pay the difference.1 Because they reported it within 180 days, they would likely avoid additional state-level penalties.2

This mechanism ensures that the $100 million state fund is not depleted by inaccurate or non-qualifying claims. It creates a closed-loop system where the “Implementation Notice” for Public Act 148 provides the rules of engagement for the long-term validity of the R&D credit.7

Treasury Guidance on UBGs and Flow-Through Entities

For complex corporate structures, the Michigan Department of Treasury has provided specific instructions through its implementation notices.

Unitary Business Groups (UBGs)

Under the Corporate Income Tax, the UBG is the “taxpayer”.7 Consequently, where a corporation with R&D expenses is a member of a UBG, the UBG—not the individual corporation—must claim the credit.4 The eligibility, employee count, and base amount are all determined at the group level.7 This prevents companies from artificially splitting operations into multiple entities to stay under the 250-employee threshold or to bypass the $2 million per-taxpayer cap.7

Flow-Through Entities (FTEs)

For FTEs that are not taxed as corporations, the credit is claimed against their sales, use, and withholding annual returns.6 This is a departure from the MBT-era credits, which were often passed through to owners to claim on individual income tax returns. By keeping the credit at the entity level, the state simplifies the proration and refund process. Members of an FTE that submits an R&D claim are specifically prohibited from claiming any portion of that credit on their own returns.8

Documentation and Audit Defense: Best Practices for Businesses

The “audit-enabled” nature of the R&D credit, as confirmed in Treasury system requirement documents, means that businesses must maintain a high standard of record-keeping.19 The state’s Tax Compliance Bureau (TCB) will have the authority to audit these credits separately from federal examinations.19

Strategic documentation requirements include:

• Project Narrative: Detailed descriptions of the research objectives and the “process of experimentation” required by IRC Section 41.9
• Payroll Allocation: Records linking specific employees to R&D projects, including those in “direct supervision” or “direct support” roles.6
• Michigan Nexus Documentation: Proof that the work was performed within Michigan, such as employee residency records or facility logs.4
• Supply Tracking: Invoices and inventory records for materials consumed in the research process in Michigan.6
• Historical Data: Evidence of QREs from the 2022-2024 base period, even if no credit was sought during those years.7

Decoupling from Federal Section 174 Amortization

One of the most compelling reasons for the new Michigan R&D credit is the state’s decision to decouple from the federal Section 174 expense treatment.4 Under current federal law, businesses can no longer immediately expense research and experimental costs; they must amortize them over five years for domestic activities and 15 years for foreign activities.4

In October 2025, Michigan enacted House Bill 4961, which modifies the state’s interaction with Section 174.4 Because Michigan has decoupled, the refundable state-level credit becomes even more important for corporate cash flow.6 While companies are forced to “wait” for their federal deductions through amortization, the Michigan R&D credit provides a direct, immediate reduction of state tax liability or a cash refund.6 This creates a powerful incentive for companies to move R&D activities from other states (that still follow federal amortization) into Michigan.6

Economic Outlook and Strategic Implications

The reintroduction of the R&D tax credit, framed by the administrative stability of Public Act 148 of 2022, signifies a broader economic strategy for the State of Michigan. By dedicating $100 million annually to this fund, the state is making a long-term bet on its ability to attract high-paying jobs in technology and manufacturing.5

The reservation of $25 million for small businesses is particularly noteworthy.4 This “startup-friendly” provision acknowledges that small firms often face the highest barriers to entry for R&D due to lack of capital.5 By offering a 15% rate on excess expenses—higher than the 10% offered to large businesses—the state is effectively subsidizing the growth of its next generation of industrial leaders.4

The following table summarizes the key milestones for the implementation of the credit:

Conclusion

The combined impact of Public Act 148 of 2022 and the 2024 Research and Development tax credit legislation creates a rigorous yet rewarding framework for innovation in Michigan. Public Act 148 provides the necessary administrative clarity, ensuring that Michigan’s tax base remains stable and that all adjustments—particularly those involving complex partnership audits—are handled with precision. Meanwhile, the R&D credit offers a significant, refundable financial incentive that restores Michigan’s competitive edge on the national stage.

For businesses, the primary takeaway is the transition from a “set and forget” mentality to a “monitor and manage” approach to research expenditures. The requirement for a “tentative claim” using actual expenses, the geographical restrictions to in-state activities, and the mandatory reporting of federal adjustments under Chapter 18 mean that the tax function must be deeply integrated with the R&D and operations departments. Companies that invest in robust tracking systems and maintain clear documentation for their “base amount” calculations will be best positioned to maximize the value of this $100 million state investment. As Michigan continues to decouple from restrictive federal provisions and foster partnerships between the private sector and research universities, the state is successfully repositioning itself as a premier destination for the high-tech industries of the 21st century.

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