The Minnesota Research and Development Tax Credit: A Comprehensive Analysis of Credit Carryover Mechanics and Administrative Policy

The Minnesota Credit for Increasing Research Activities carryover represents the excess portion of a research tax credit that cannot be fully utilized against current-year tax liabilities and is subsequently moved forward to offset taxes in future periods. Under state law, this mechanism provides businesses with a fifteen-year window to monetize their investments in innovation, ensuring that the fiscal incentive remains effective even during periods of low profitability or net operating losses.

The functionality of the Minnesota Research and Development (R&D) tax credit is established through a complex interaction between Minnesota Statute Section 290.068, federal Internal Revenue Code alignment, and evolving administrative guidance from the Minnesota Department of Revenue (MDOR). Historically, the credit served as a strictly nonrefundable benefit, functioning primarily as a tax reduction tool rather than a direct subsidy.1 However, the landscape of this incentive is currently undergoing its most significant transformation in over a decade. With the enactment of H.F. 9 in June 2025, Minnesota is pivoting toward a partial refundability model for tax years beginning after December 31, 2024, which fundamentally alters how carryover credits are managed and prioritized.3 This shift represents a broader legislative effort to support the state’s innovation ecosystem, particularly for early-stage startups and high-growth technology firms that incur massive research expenses before achieving sustained profitability. Understanding the specific mechanics of credit carryovers, the rules for unitary group sharing, and the rigorous documentation standards required by the state is essential for any business seeking to optimize its long-term tax position in Minnesota.

The Statutory Architecture of Minnesota Statute Section 290.068

The foundation of the credit is found in Minnesota Statutes Section 290.068, which grants a credit against the corporate franchise or individual income tax for businesses that increase their research activities within the state.1 The legal framework is designed to be incremental, meaning it does not reward total research spending, but rather the growth in spending relative to a historical base amount.6

Subdivision 1: The Two-Tiered Incentive Structure

The credit calculation follows a tiered rate system that provides a higher percentage of relief for the initial portion of a company’s increased research investment. This structure is intended to make the credit highly accessible to small and mid-sized enterprises while still providing a meaningful incentive for the state’s largest corporate R&D spenders.

For taxable years beginning before 2017, the second tier was significantly lower at 2.5%, but legislative amendments have since increased the rate to 4% to enhance the state’s competitive posture.7 This two-tiered approach ensures that a business with $3,000,000 in excess QREs would earn a credit of $240,000 ($2,000,000 at 10% and $1,000,000 at 4%), as opposed to a flat rate system which might favor only the largest or smallest entities.1

Subdivision 2: Definitions and Federal Conformity

Minnesota generally conforms to the federal definitions of “qualified research expenses” and “qualified research” as set forth in Section 41(b) and (e) of the Internal Revenue Code (IRC).1 However, the state applies a strict geographic restriction: all research must be conducted within the state of Minnesota to qualify for the state-level credit.7

The “base amount” calculation is one of the most significant points of departure from federal law. While the federal government allows for the Alternative Simplified Method (ASM), Minnesota law does not recognize this method.2 Instead, Minnesota taxpayers must use the regular incremental method, which requires a calculation of a “fixed-base percentage” and “average annual gross receipts” using Minnesota-specific sales or receipts.2 The “gross receipts” for these purposes are defined by the apportionment rules under Section 290.191, tying the credit calculation directly to the taxpayer’s economic activity within the state.1

Subdivision 3: Limitation and the 15-Year Carryover

The central governing text for credit carryovers is found in Subdivision 3 of Section 290.068. The statute dictates that for years beginning before January 1, 2025, the credit cannot exceed the “liability for tax” for the taxable year.1 The term “liability for tax” is defined as the sum of the taxes imposed under Section 290.06, reduced by other nonrefundable credits allowed under the chapter.1

If the calculated credit exceeds this tax liability, the unused portion is not lost but instead becomes a “research credit carryover to each of the 15 succeeding taxable years”.1 The law requires that the entire amount of the unused credit be carried first to the earliest possible taxable year and then sequentially to each successive year until it is either fully utilized or the 15-year period expires.1 This “first-in, first-out” (FIFO) accounting method is critical for businesses to manage, as it ensures that the oldest credits—which are closest to expiration—are used first to offset tax obligations.

Unitary Business Groups and the 2020 Administrative Guidance

One of the most complex and historically contentious areas of the Minnesota R&D credit involves the treatment of unitary business groups. A unitary group consists of multiple corporations or entities that operate as a single integrated business, often with one member performing research for the benefit of the entire group.

The Evolution of Credit Sharing Rules

For many years, the administrative position of the Minnesota Department of Revenue was that while a current-year credit could be shared among members of a unitary group, a carryover credit was “trapped” within the specific entity that originally earned it. This policy created significant tax inefficiencies for corporate groups where a dedicated R&D subsidiary might generate massive credits but have no tax liability of its own, while its sister sales or manufacturing subsidiaries paid full state taxes.2

On June 18, 2020, the MDOR issued updated guidance that fundamentally reversed this position.2 The new guidance clarified that for tax years beginning after December 31, 2012, R&D credit carryovers must be applied to other members of a combined group in the same manner as the credit is applied in the year it is generated.2 This update was effectively a modification of the instructions provided on previous versions of Schedule RD, and it opened a major opportunity for C corporations to file amended returns and claim refunds for taxes paid in years where carryovers were previously disallowed for sharing.8

The Order of Application for Unitary Groups

The current administrative guidance and the instructions for Schedule RD (Forms 2018 through 2024) establish a mandatory order of operations for applying the R&D credit within a combined return:

1. Direct Utilization: The earning member (the entity that incurred the QREs) must use the credit to offset its own tax liability for the year.2
2. Current-Year Allocation: If the earning member’s liability is reduced to zero, any remaining current-year credit must be allocated to other members of the unitary group to offset their liabilities.2
3. Carryover Designation: Any amount still remaining after offsetting the entire group’s tax liability becomes a carryover.2
4. Future Year Utilization: In subsequent years, the carryover is again first applied to the earning member’s liability. If a balance remains, it is then shared with other group members.2

This mechanism ensures that the credit is used as broadly as possible within the unitary structure, preventing the expiration of credits while other parts of the business are still paying Minnesota corporate franchise taxes.

Theoretical Implications of Revenue Notice 20-03 Context

While the 2020 guidance provided clarity, it also introduced new audit risks. Taxpayers who had previously accepted the MDOR’s “trapped credit” position were encouraged to revisit their open tax years.2 However, the guidance also indicated that the MDOR would apply this sharing rule to all open audits and refund claims, potentially leading to more rigorous examinations of how these credits were originally calculated.8 Furthermore, the MDOR reiterated that while the sharing became effective in 2013, it remains unclear whether carryovers generated before 2013 can be shared, or if they remain restricted to the earning entity.2

The 2025 Pivot: Partial Refundability and H.F. 9

The most transformative change to the Minnesota R&D credit in the modern era was the signing of H.F. 9 by Governor Tim Walz in June 2025. This legislation reintroduces a form of refundability to the credit, a feature that had been absent from the Minnesota tax code since 2012.2

Mechanics of the Refund Election

Beginning with tax years that start after December 31, 2024, taxpayers have the option to receive a cash refund for a portion of their unused R&D credits instead of carrying the entire amount forward for 15 years.4 This election must be made on a timely filed original return (including extensions) and, once made for a specific tax year, it is irrevocable.5

The refundable portion is calculated after the credit has been used to reduce the taxpayer’s liability (and the liability of any unitary group members) to zero.7 The remaining “unused” portion is then multiplied by a statutory refundability rate.

Statutory Refundability Rates and Forecast Adjustments

The legislature has provided a clear schedule for refundability rates through 2027, with a unique fiscal balancing mechanism for subsequent years.

Starting in 2028, the Commissioner of Revenue is mandated to adjust the refundability rate annually. The goal is to keep total statewide R&D refunds at approximately $25 million per year.3 This rate must be published by December 27 of the preceding year, based on the November revenue forecast.3 This creates a “sliding scale” of benefit that ensures fiscal stability for the state while providing a predictable baseline for businesses.

The Interaction Between Refundability and Carryover

A critical misunderstanding for many taxpayers is the idea that refundability replaces the carryover. In reality, the two mechanisms work in tandem. If a taxpayer elects the 25% refund in 2026, they receive a check for one-quarter of their unused credit. The remaining 75% of that credit is not forfeited; it continues to carry forward as a nonrefundable credit for the remainder of the 15-year statutory period.4

This “best of both worlds” approach allows startups to get immediate cash flow to fund current operations while retaining the long-term tax-shielding value of the remaining credit. For mature companies with fluctuating profitability, this provides a strategic choice: monetize a portion of the credit now at a discount or wait to use the full 100% of the credit against future tax liabilities.

Deep Dive into Credit Calculation: The Regular Incremental Method

To understand the value of a carryover, a taxpayer must first master the calculation of the credit itself. Minnesota’s adherence to the regular incremental method, while rejecting the Alternative Simplified Method (ASM), places a heavy burden on historical data.

Calculating the Base Amount

The Minnesota R&D credit is “incremental” because it only applies to research expenses that exceed a “base amount”.6 The base amount is calculated through a two-step formula:

1. Fixed-Base Percentage: For established firms, this is the ratio of aggregate QREs to aggregate gross receipts for the 1984-1988 period, capped at 16%.1 For “start-up” companies (those that did not have both QREs and gross receipts in at least three years between 1984 and 1988), a statutory fixed-base percentage of 3% is used for the first five years, with a gradual transition to actual historical ratios thereafter.6
2. Average Annual Gross Receipts: This is the average of the taxpayer’s Minnesota-sourced gross receipts for the four taxable years preceding the current credit year.1

The statutory formula is:

$$\text{Base Amount} = \text{Fixed-Base Percentage} \times \text{Average Annual Gross Receipts}$$

However, the law imposes a “minimum base amount” rule. The base amount used in the final calculation cannot be less than 50% of the current year’s QREs.3 This rule is particularly beneficial for mature Minnesota companies that have significantly increased their research activity relative to their historical levels, as it ensures they still receive a credit even if their growth exceeds their historical base ratio.

Mathematical Example of the Tiered Calculation

Consider a Minnesota-based technology firm with $10,000,000 in current-year QREs and a calculated base amount of $6,000,000.

• Excess QREs: $10,000,000 – $6,000,000 = $4,000,000$
• Tier 1 Credit: $2,000,000 \times 10% = $200,000$ 1
• Tier 2 Credit: ($4,000,000 – $2,000,000) \times 4% = $80,000$ 1
• Total Tentative Credit: $280,000$

If this company has a tax liability of only $50,000, they would use $50,000 of the credit to reduce their tax to zero. The remaining $230,000 would become a carryover for use in the next 15 years.1

The Four-Part Test: Sustaining the Carryover Asset

A carryover is only as strong as the documentation supporting the original QREs. The Minnesota Department of Revenue rigorously applies the “Four-Part Test” derived from IRC Section 41 to verify the eligibility of research activities.3

1. Permitted Purpose

The research must be intended to create a new or improved business component. The goal of the activity must be to improve the functionality, performance, reliability, or quality of a product, process, software, or technique.7 Routine modifications, seasonal designs, or aesthetic changes do not qualify.7

2. Elimination of Uncertainty

At the outset of the research, there must be a technical uncertainty regarding the capability or method of developing the component or the appropriateness of its design.7 If the path to a solution is professionally obvious, the activity is not “qualified research.”

3. Process of Experimentation

The taxpayer must follow a systematic process designed to evaluate one or more alternatives to achieve a result.7 This involves formulating a hypothesis, testing it through modeling or prototyping, and refining or discarding the hypothesis based on the results.7

4. Technological in Nature

The process of experimentation must fundamentally rely on the principles of physical science, biological science, engineering, or computer science.3

Exclusions and the “Minnesota-Only” Mandate

Even if an activity passes the Four-Part Test, it must be performed in Minnesota to qualify for the state credit.7 Furthermore, certain expenditures are explicitly excluded by statute:

• Outside Research: Expenses for research conducted outside the state.1
• Innovation Grants: Expenditures funded by Innovation Grants from the Minnesota Department of Employment and Economic Development (DEED).7
• Post-Production Research: Research conducted after the beginning of commercial production.7
• Adaptation/Duplication: Adapting an existing business component to a specific customer’s needs or duplicating an existing component via reverse engineering.7

Administrative Guidance on Documentation and Record Retention

Because an R&D credit carryover can remain on a taxpayer’s books for fifteen years, the “shelf life” of the supporting documentation must be equally long. The MDOR provides specific, albeit sometimes limited, guidance on what records are necessary to substantiate a claim.7

Contemporary Record Keeping

The MDOR emphasizes that “solely interviewing employees to reconstruct activities believed to qualify for the credit is generally insufficient”.7 Taxpayers are expected to maintain records created at the time the research was performed.

The Extended Retention Period

While the general statute of limitations for the MDOR to review a return is 3.5 years from the filing date, the existence of a carryover creates a “floating” audit window.8 The Department has the authority to audit the generation of a credit in the year it is used to offset tax. Therefore, if a credit is generated in 2024 and used as a carryover in 2035, the documentation from 2024 remains relevant and must be available for inspection until approximately 2039 (3.5 years after the 2035 return is filed).2

MDOR guidance specifically suggests keeping records for at least six years if the records are needed to complete a future return, such as those involving credit carryovers or net operating losses.20 For significant R&D claims, industry best practice is to maintain the “project file” (the technical substantiation) for as long as any portion of the credit remains unexpired.22

Statistical Landscape and Fiscal Impact of the Credit

The R&D tax credit is one of Minnesota’s most significant business tax expenditures. Data from the 2024 Tax Expenditure Budget and historical evaluations provide insight into the scale and utilization of the incentive.

Fiscal Cost and Growth Trends

The cost of the credit to the state’s General Fund has seen a dramatic increase, particularly in the corporate franchise tax sector.

This growth is attributed to a combination of legislative enhancements (such as the 2017 rate increase to 4%) and a generally expanding technology and manufacturing base in the state.6 Interestingly, while C corporations claim about 67% of the total credit value, the largest 20% of these corporations (by sales) historically received two-thirds of the total corporate credit.18

Claimant Demographics

The credit is utilized by a wide array of entities, including “C” corporations, individual shareholders in “S” corporations, and individual partners in partnerships.18 Estimates based on 2022 tax data suggest that proposed changes to calculation methods (such as the Alternative Simplified Method, which was considered but not enacted in its full federal form) would affect roughly 300 corporate taxpayers.11 The reintroduction of refundability is expected to primarily benefit this cohort, along with smaller startups that are currently carrying forward tens of millions of dollars in unusable credits.

Impact of Federal Tax Policy Changes (IRC Section 174)

A recent development in federal tax law—the Omnibus Budget and Business Balancing Act (OBBBA)—has significant implications for Minnesota R&D credit claimants. Federal law now requires research and experimentation (R&E) expenses to be amortized over five years (fifteen years for foreign research) instead of being deducted immediately.24

The Minnesota Conformity Challenge

Minnesota’s tax code often lags behind federal changes, leading to “conformity” issues. For R&D credit claimants, the change in Section 174 treatment impacts the calculation of taxable income but does not directly change the definition of QREs for the Minnesota credit.11 However, because the Minnesota credit is based on “excess” expenses over a base amount, and that base amount is derived from historical gross receipts and expenses, any shift in how the federal government defines or periods these expenses can create administrative friction.2 Taxpayers must ensure that their Minnesota Schedule RD calculation remains focused on the incurred expenses in the state, regardless of the federal amortization schedule.1

Navigating Pass-Through Entity Nuances

For S corporations, partnerships, and LLCs, the R&D credit carryover mechanism operates at the individual owner level rather than the entity level.

Allocation and Schedules

The entity calculates the total R&D credit earned using Schedule RD.7 The credit is then allocated to the owners pro-rata based on their ownership interest.2

• Partnerships: Use Schedule KPI (for individual partners) or KPC (for corporate partners).2
• S Corporations: Use Schedule KS to report the share of the credit to each shareholder.2

The Role of the Individual Income Tax

Individual owners then report this credit on Schedule M1C (Other Nonrefundable Credits) and apply it against their personal Minnesota income tax liability (Form M1).2 If the individual cannot use the full credit, they—not the entity—maintain the 15-year carryover for their personal tax history.2

Minimum Fee Considerations

While the R&D credit generally offsets income tax, it is important to note that partnerships and S corporations are also subject to a Minnesota “minimum fee” if their Minnesota source property, payroll, and sales exceed $1,250,000.28 The R&D credit is generally not available to offset this minimum fee; it is strictly a credit against the income/franchise tax components of the state’s tax system.28

Comprehensive Example: The “Innovation Dynamics” Multi-Year Scenario

To bring these various concepts together, let us examine a hypothetical scenario involving “Innovation Dynamics LLC” (a partnership) and its majority partner, “Sarah.”

Year 1: High Research, Zero Profit

In 2025, Innovation Dynamics spends $1,000,000 on qualified research in Minnesota. Its calculated base amount is $400,000.

• Total Credit Generated: ($600,000 excess QREs) x 10% = $60,000.1
• Sarah’s Share: Sarah owns 50% of the LLC, so she is allocated $30,000 of the credit on her Schedule KPI.2
• Sarah’s Tax Position: Sarah has a Minnesota tax liability of $5,000.
• Refund Election: Sarah elects the 2025 partial refundability option (19.2%).5

Application Order:

1. Direct Use: Sarah uses $5,000 of the credit to reduce her tax to zero.
2. Unused Portion: $25,000 ($30,000 total – $5,000 used).
3. Refund: $25,000 x 19.2% = $4,800 cash refund.4
4. Carryover: The remaining $20,200 ($25,000 – $4,800) is a carryover to 2026.4

Year 2: Profitability and Carryover Utilization

In 2026, Sarah’s share of the LLC’s income is high, and her Minnesota tax liability is $25,000. The LLC generates a new R&D credit of $10,000 for her share.

• Available Credits: $10,000 (Current) + $20,200 (Year 1 Carryover).

Application Order:

1. Current Credit First: Sarah uses the $10,000 Year 2 credit. Remaining tax liability: $15,000.1
2. Carryover Second: Sarah applies $15,000 of the Year 1 carryover. Remaining tax liability: $0.
3. Remaining Carryover: Sarah has $5,200 ($20,200 – $15,000) of the Year 1 carryover left to move to 2027.1

This example illustrates the strategic power of the refundability election and the long-term utility of the carryover, allowing Sarah to survive a lean Year 1 while still having credits to wipe out her tax in a profitable Year 2.

Comparative Benchmarking: Minnesota vs. National Standards

For businesses operating in multiple states, the Minnesota R&D credit must be understood within the national context. While Minnesota’s 10% rate is competitive, its administrative requirements are often perceived as more rigid than those of neighboring states.

Minnesota’s lack of an Alternative Simplified Method (ASM) is a significant differentiator. States like Iowa and the federal government allow businesses to calculate their credit based on recent research history without needing to dig back into records from the 1980s.11 This makes Minnesota’s credit more difficult to calculate for long-standing companies that have undergone multiple mergers or acquisitions, as historical “base period” data for acquired subsidiaries can be difficult to reconstruct.2

Potential Pitfalls and Audit Red Flags

The Minnesota Department of Revenue is known for its rigorous auditing of R&D credits. Certain situations are more likely to trigger an inquiry or a disallowance of a carryover.

1. Inconsistent “Minnesota Sales”

The base amount calculation relies on “Minnesota sales or receipts.” If the sales figure used on Schedule RD does not match the sales figure reported on the apportionment schedule (M4A) of the same return, it is a high-probability audit trigger.1

2. Failure to Substantiate Wage Percentages

The MDOR often challenges “blanket” allocations where a company claims that all engineers spend exactly 100% of their time on R&D. Without project-specific time logs, the Department may use “estimation” to significantly reduce the qualifying wage base, which in turn reduces the generated credit and any subsequent carryover.7

3. “Contract Research” vs. “Purchased Services”

To qualify for the credit, contract research must be performed on behalf of the taxpayer, who must retain “substantial rights” to the results and bear the “financial risk” of the research.7 If an agreement looks like a purchase of a finished product rather than an agreement for the performance of research, the MDOR will likely disqualify the expenses.7

4. Innovation Grant Double-Dipping

Taxpayers who receive Innovation Grants from DEED must be careful to subtract these grant amounts from their QREs. Claiming both the grant and the tax credit for the same dollar of research spending is explicitly prohibited.7

Strategic Outlook: The Future of the Minnesota R&D Credit

The reintroduction of refundability in 2025 signals a new era for Minnesota’s tax policy. For the first time, the state has recognized that the “carryover” mechanism alone is insufficient to support the cash-flow needs of the modern innovation economy.

Legislative Resilience

Despite criticisms from groups like the Office of the Legislative Auditor—which noted that the credit does not always pay for itself in terms of immediate tax revenue—the credit enjoys broad bipartisan support.11 The legislature views the credit as a vital tool for competing with other technology hubs like Boston, Austin, and the Silicon Valley.

Preparing for 2028

Taxpayers must begin planning now for the post-2027 period, where the Commissioner of Revenue will have the authority to reduce the refundability rate below 25% to stay within the $25 million statewide cap.3 Companies with massive R&D projects slated for the late 2020s should consider accelerating their expenditures to take advantage of the guaranteed 25% rates in 2026 and 2027.

Conclusion: Balancing Liquidity and Longevity

The Minnesota Research and Development tax credit carryover is far more than a simple accounting entry. It is a fifteen-year strategic asset that requires meticulous legal adherence, precise mathematical calculation, and rigorous administrative record-keeping. The pivot toward partial refundability in 2025 provides businesses with unprecedented flexibility, allowing them to balance their immediate liquidity needs with the long-term tax mitigation benefits of the 15-year carryforward.

For the business professional, the takeaway is clear: the value of the R&D credit is not determined in the year it is generated, but in the decade it is sustained. By mastering the rules of unitary group sharing, staying current with legislative shifts like H.F. 9, and maintaining a “permanent” documentation vault, Minnesota companies can ensure that their investments in today’s research become the foundation for tomorrow’s fiscal stability. Whether through a 19.2% cash refund or a full-value credit used to offset taxes in 2040, the Minnesota R&D credit remains the state’s most potent incentive for those who seek to build the future within its borders.

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