The Massachusetts Research and Development Tax Credit: A Comprehensive Analysis of the 15-Year Carryover and Indefinite Carryforward Mechanisms

The Massachusetts research and development carryover period allows corporations to apply unused tax credits against their corporate excise for up to fifteen taxable years following the year the credit was generated. However, any portion of the research credit that is specifically disallowed due to the seventy-five percent excise limitation rule is eligible for an indefinite carryforward period.1

This bifurcated carryforward structure represents one of the most generous and complex tax incentive mechanisms within the Commonwealth’s corporate excise framework. Established under Massachusetts General Laws (M.G.L.) c. 63, § 38M, the research credit is designed to foster a robust innovation economy by effectively reducing the cost of technical experimentation and scientific discovery conducted within the state.1 The legislative intent behind the fifteen-year and indefinite carryover provisions is to ensure that capital-intensive industries—such as life sciences, biotechnology, and advanced manufacturing—can eventually realize the full value of their research investments, even if those investments exceed their current-year tax liabilities or are curtailed by statutory utilization caps.1 By providing a long-term horizon for credit application, the Commonwealth mitigates the fiscal risk associated with volatile research spending and long development cycles common in high-technology sectors.1

The Statutory Framework: M.G.L. c. 63, § 38M

The primary legal authority for the Massachusetts research credit is M.G.L. c. 63, § 38M, which was enacted to provide a state-level counterpart to the federal research credit under Internal Revenue Code (IRC) § 41.5 While the Massachusetts credit adopts many of the definitions and principles found in the federal code, it maintains distinct requirements and limitations that necessitate specialized compliance strategies.7 The credit is generally available to business corporations subject to the excise tax under M.G.L. c. 63, § 39, including both domestic and foreign corporations.8

The core of § 38M provides a credit against the corporate excise equal to the sum of ten percent of the excess of Massachusetts qualified research expenses over a base amount, plus fifteen percent of basic research payments made to qualified organizations.1 For taxable years beginning on or after January 1, 2015, the legislature amended the statute to allow an Alternative Simplified Credit (ASC) method, modeled after the federal alternative simplified credit found in IRC § 41(c)(4).4 This evolution of the law reflects a continuing commitment to administrative simplicity and global competitiveness in attracting technical talent and capital.3

Eligibility and Nexus Requirements

To qualify for the credit, research activities must meet the “four-part test” derived from federal standards: they must be technological in nature, have a permitted purpose (such as developing a new or improved product or process), involve the elimination of uncertainty, and utilize a process of experimentation.7 Beyond these technical requirements, Massachusetts imposes a strict geographic nexus. Only “Massachusetts qualified research expenses” are eligible, defined as expenses incurred for research activity conducted within the Commonwealth.1

Qualified research expenses typically encompass:

• Wages paid to employees for performing qualified services in Massachusetts.2
• Amounts paid for supplies used or consumed in the conduct of research within the state.2
• Sixty-five percent of contract research expenses attributable to research activity conducted at a Massachusetts research facility.4
• Amounts paid for the right to use computers located in Massachusetts to the extent they are treated as in-house research expenses.4

The necessity of performing research in-state is the defining characteristic of the Massachusetts credit. If services are performed both within and outside the state, the expense must be prorated based on the ratio of days the service was performed in Massachusetts.12 This requirement underscores the state’s policy of tying fiscal benefits to local job creation and infrastructure development.3

Calculation Methodologies and the Generation of Credits

The amount of credit generated in a taxable year—and consequently the amount available for carryover—depends on the calculation method elected by the taxpayer. The Massachusetts Department of Revenue (DOR) provides two primary options on Schedule RC (Research Credit).15

The Regular (Incremental) Method

Under the regular method, the credit is calculated as follows:

$$Credit = 10\% \times (MA\_QREs – Base\_Amount) + 15\% \times (MA\_Basic\_Research\_Payments)$$

The “base amount” is determined by multiplying the taxpayer’s “fixed-base ratio” by its average annual gross receipts for the four taxable years preceding the credit year.5 To prevent an excessive credit for companies with historically low research spending, the statute mandates that the base amount cannot be less than fifty percent of the Massachusetts qualified research expenses for the credit year.10

For the regular method, the “fixed-base ratio” is the percentage that the taxpayer’s aggregate Massachusetts qualified research expenses for the third and fourth taxable years preceding the credit year represent of the annual average gross receipts for those years.15 This ratio is capped at sixteen percent.15 Taxpayers may elect to use either their federal gross receipts or specifically their Massachusetts gross receipts when calculating the base amount, a choice that is binding for three consecutive taxable years.1

The Alternative Simplified Credit (ASC) Method

For tax years beginning on or after January 1, 2021, the ASC method provides a credit equal to ten percent of the current year’s Massachusetts qualified research expenses that exceed fifty percent of the average Massachusetts research expenses for the three preceding taxable years.1 If the taxpayer did not have qualified research expenses in any of the three preceding years, the credit is reduced to five percent of the current year’s expenses.5

The ASC method is often preferred by companies that lack the historical records required for the regular method or those whose research spending has increased dramatically in recent years.1 Like the regular method, once an ASC election is made, it generally remains in effect and should not be changed without significant justification.1

Statutory Limitations: The Genesis of the Carryover

The research credit is nonrefundable for most business corporations, meaning it can only offset the excise tax actually owed.1 When the credit generated (or carried over) exceeds the amount the law permits a taxpayer to use in a given year, a “carryover” is created.2 There are three primary limitations that dictate how much credit can be utilized annually.

1. The Minimum Excise Floor

Under M.G.L. c. 63, §§ 32(b) or 39(b), the research credit cannot be used to reduce a corporation’s excise liability below the minimum tax floor, which is currently set at $456.1 This represents the absolute minimum amount a corporation must pay for the privilege of doing business or exercising a corporate franchise in Massachusetts.6

2. The Seventy-Five Percent Limitation

A more complex limitation, established in M.G.L. c. 63, § 38M(d), restricts the amount of credit that can be applied against excise in excess of $25,000.1 The credit utilization is capped at:

• One hundred percent of the corporation’s first $25,000 of excise liability.1
• Seventy-five percent of any excise liability that exceeds $25,000.1

The “excise liability” for this calculation is determined before the application of any credits and encompasses both the income measure and the non-income (property or net worth) measure of the corporate excise.1

3. Aggregated Group Sharing and Limitations

For corporations that are members of a controlled group (as defined by IRC § 41(f)), the Department of Revenue may aggregate the activities of all members for the purposes of determining the credit.5 In such cases, a single $25,000 threshold applies to the entire group.1 The $25,000 amount is prorated among the member corporations doing business in Massachusetts based on their respective excise liabilities.12

Analysis of the 15-Year Carryover Period

The “fifteen-year carryover” refers to the lifespan of credits that are considered “unused” or “unexpired”.5 According to M.G.L. c. 63, § 38M(f), any corporation entitled to a credit for any taxable year may carry over and apply to its excise for any one or more of the next succeeding fifteen taxable years the portion of its credit which exceeds its excise for the taxable year.5

Triggers for the 15-Year Carryover

The fifteen-year limit applies to credit amounts that cannot be used because:

1. The taxpayer has zero or negative taxable income (losses) and thus no income-measure excise to offset.20
2. The taxpayer’s total available credit simply exceeds its total calculated excise for the year.1
3. The credit utilization is halted because it would otherwise reduce the total tax below the $456 minimum.10

This fifteen-year window provides significantly more flexibility than many other state credits, which often expire in five or seven years. It allows a startup in its “burn phase”—common in biotechnology or hardware development—to accumulate credits during years of heavy loss and apply them during its first decade of profitability.1

Tracking and Expiration

Taxpayers must track these carryovers on a year-by-year basis, typically following a First-In, First-Out (FIFO) utilization order.18 When filing Schedule RC, the taxpayer must report the amount of credit generated in the current year and the amount of carryover from previous years being applied.15 If a credit is not used within the fifteen taxable years following its generation, it expires and is lost forever.5

The Indefinite Carryforward: The “Unlimited” Rule

A unique and strategically vital provision of the Massachusetts law is the “indefinite” or “unlimited” carryforward.1 This applies to portions of the research credit that were legally prohibited from being used in a specific year due to the seventy-five percent limitation.1

The Disallowed Portion

The law recognizes a distinction between credit that is unused because there is no tax to pay, and credit that is “disallowed” because the state prevents you from paying zero tax even when you have high profits.1 The portion disallowed by the seventy-five percent rule is effectively the twenty-five percent of the excise in excess of $25,000.10

For example, if a corporation has an excise of $125,000, it is allowed to use credits to offset $25,000 (100%) plus $75,000 (75% of the remaining $100,000), for a total utilization of $100,000.1 The remaining $25,000 of excise (the other 25% of the excess over $25,000) cannot be offset by the credit.1 If the taxpayer had enough credits to cover that $25,000, that specific portion is not subject to the fifteen-year expiration; instead, it carries forward indefinitely.1

Policy Rationale

The indefinite carryforward ensures that high-growth, high-profit companies that continue to invest heavily in R&D are not penalized by the utilization cap.1 It preserves the economic value of the credit indefinitely, which is particularly important for publicly traded companies concerned with deferred tax assets and long-term financial reporting.1

Department of Revenue Guidance and Interpretations

The Massachusetts Department of Revenue (DOR) has issued several Technical Information Releases (TIRs) and Directives to clarify the mechanical application of carryovers. These documents serve as the primary administrative authority for tax practitioners.

TIR 91-8: Procedural Compliance

Issued shortly after the credit’s enactment, TIR 91-8 explains how corporations should claim the credit on their corporate excise returns.23 It emphasizes the requirement to attach a completed Schedule RC (Research Credit) to substantiate the computation of the credit and the carryover amounts.23 This release also clarified that research expenses are considered incurred if they are treated as such for federal income tax purposes.23

TIR 14-11: Combined Reporting and Administration

TIR 14-11 addresses tax changes in the Fiscal Year 2015 Budget and provides technical changes to tax administration for corporations subject to combined reporting.24 It confirms that while members of a combined group may share credits to reduce the group’s overall excise, any “unused and unexpired” credits must be carried over by the individual corporation that originally generated the credit.5

Directive 88-23: Order of Credit Utilization

Directive 88-23 establishes the “Order of Use” for credits when a corporation has multiple types available (e.g., Investment Tax Credit, Research Credit, Vanpool Credit).21 To prevent the unnecessary lapsing of credits, the DOR mandates that credits which will expire first must be taken before those with longer or indefinite lifespans.21

The hierarchy generally dictates:

1. Current year credits with no carryover provision.
2. Carryovers that will lapse by the end of the current tax year.
3. Carryovers that will lapse in subsequent years (in chronological order).
4. Indefinite carryforwards.21

Directive 01-9: Recapture and Offset

Directive 01-9 provides guidance on how carryover and current-year credits can be applied against a corporation’s recapture tax.22 It clarifies that the recapture of certain credits is considered part of the “excise due” for the purpose of applying utilization limitations.22 Crucially, it notes that the fifty percent limitation found in M.G.L. c. 63, § 32C (which applies to Investment Tax Credits) does not apply to the research credit.12

Detailed Example: Multi-Year Research Credit Lifecycle

To understand the interaction between the fifteen-year and indefinite carryover, consider the case of “TechFlow Inc.,” a hypothetical Massachusetts-based software engineering firm.

Year 1: Heavy Investment and Losses

In 2024, TechFlow Inc. incurs $2,000,000 in Massachusetts qualified research expenses. Under the ASC method (assuming no prior QREs), the credit generated is:

• $Credit = 5\% \times \$2,000,000 = \$100,000$.5

The company has a net operating loss and its total excise liability is only the $456 minimum tax.2

• Credit Used: $0 (cannot reduce tax below $456).2
• Carryover Generated: $100,000.
• Expiration: Because utilization was stopped by the minimum excise, the entire amount is a 15-Year Carryover expiring in 2039.10

Year 2: Profitability and the 75% Rule

In 2025, TechFlow Inc. becomes profitable. It generates no new credits but has an excise liability of $125,000 before credits. It applies its $100,000 carryover from 2024.

Calculation of Utilization Cap:

• First $25,000: 100% allowed = $25,000.12
• Remaining $100,000: 75% allowed = $75,000.12
• Total Allowable Utilization: $100,000.1

TechFlow uses all $100,000 of its carryover.

• Credit Used: $100,000.
• Excise Paid: $125,000 – $100,000 = $25,000.
• Remaining Carryover: $0.

Year 3: Excess Credits and Indefinite Carryforward

In 2026, TechFlow generates $200,000 in new research credits and has an excise liability of $125,000.

Calculation of Utilization Cap:

• Total Allowable Utilization (as calculated in Year 2) = $100,000.1

Allocation of Unused Credit:

• Total Credit Generated: $200,000.
• Total Used: $100,000.
• Total Unused Balance: $100,000.

Determination of Carryover Type:

The amount “disallowed” by the 75% rule is the 25% of the excise over $25,000.

• 25% of ($125,000 – $25,000) = $25,000.10
• Indefinite Carryforward Amount: $25,000.1
• 15-Year Carryover Amount: $100,000 – $25,000 = $75,000.1

Sector-Specific Nuances: The Life Sciences Impact

Massachusetts is a global hub for life sciences, and the state provides specific enhancements to the research credit for companies in this sector through the Massachusetts Life Sciences Center (MLSC).1

Refundability vs. Carryover

Certified life sciences companies may apply for a refund of unused research credits instead of carrying them forward.1 If the MLSC authorizes the refund, the company can receive ninety percent of the balance of the remaining credits.1

This refund election effectively bypasses the fifteen-year carryover for certified companies, providing immediate cash flow.1 However, the refund only applies to credits awarded or authorized for that specific year through the life sciences tax incentive program.1 Unused “standard” research credits that are not authorized for a refund continue to follow the fifteen-year and indefinite carryover rules.25

The Life Sciences Research Credit (§ 38W)

Beyond the standard § 38M credit, certified life sciences companies may claim the Life Sciences Research Credit under M.G.L. c. 63, § 38W.10 This credit applies to expenditures that do not qualify under § 38M, such as clinical trial costs incurred both inside and outside of Massachusetts.25 Unlike the refundable portion of § 38M, the § 38W credit is generally nonrefundable and has its own fifteen-year carryforward period.25

Administrative Procedures and Compliance

To successfully maintain and apply research credit carryovers, corporations must adhere to specific filing and recordkeeping requirements.

Filing Schedule RC

Every corporation that generates or uses a research credit must complete Schedule RC and include it with its corporate excise return.15 This schedule requires the taxpayer to:

• Identify the calculation method (Regular vs. ASC).15
• Elect whether to use Massachusetts or Federal gross receipts.6
• Calculate the current-year credit.15
• Apply utilization limitations ($456 floor and 75% cap).15
• Track carryover balances separately by year of generation.15

The Credit Manager Schedule (CMS)

In addition to Schedule RC, taxpayers must report the total amount of credit used and any remaining carryover on the Credit Manager Schedule (CMS).10 The CMS acts as the master log for all credits claimed by the taxpayer, ensuring that the aggregate utilization does not violate any statutory rules.10

S-Corporation and Flow-Through Considerations

For S-corporations, the research credit is applied at the entity level against the corporate excise.1 Crucially, S-corporations cannot pass the research credit through to their individual shareholders.1 This makes the carryover provision essential for S-corporations, as any credit that exceeds the entity-level tax must be carried forward by the S-corporation itself for use in future years.1

For other flow-through entities, such as partnerships and LLCs treated as partnerships, the credit is attributed to the owners (partners/members) according to their ownership interests.1 The owners then claim the credit against their own excise or income tax liabilities, where they are subject to the fifteen-year carryover rules at their respective levels.1

Strategic Audit Defense and Record Retention

The long lifecycle of the research credit carryover (fifteen years to indefinite) poses unique audit risks. The Department of Revenue may examine a return filed fifteen years ago to verify the validity of a credit being used on a current-year return.1

Retention of Supporting Data

The DOR mandates that corporations maintain adequate records to substantiate the credit calculation.10 Because the “base amount” under the regular method relies on gross receipts and research spending from four or more years prior to the credit year, records for those “base years” must be kept for as long as the credits derived from them remain in the carryover pool.4

Best practices for documentation include:

• Project-by-project breakdowns of research activities.13
• Time-tracking data or labor distributions for R&D personnel.1
• Vendor contracts and invoices for supplies and contract research.13
• Evidence of the “Massachusetts site” for all activities.1

Dealing with the Statute of Limitations

While the standard statute of limitations for an audit is three years after a return is filed, practitioners often recommend a retention period of seven to ten years—or longer if credits are being carried forward indefinitely.1 If the DOR audits a year in which a carryover is utilized, they are within their rights to look back at the documentation for the year in which the credit was generated, even if that year’s statute of limitations for additional assessment has closed.1

Economic Context and the Innovation Economy

The Massachusetts Research Credit is not merely a tax rule but a vital part of the state’s economic strategy. The 2023 Index of the Massachusetts Innovation Economy highlights that this sector accounts for nearly forty percent of jobs in the state.3

Research Investment Growth

Since 2015, research investment into Massachusetts has grown by more than fifty-six percent, trailing only California and New York in total growth rate.3 The Commonwealth attracts more research investment relative to the size of its economy than any other state in the nation.3 This concentration of high-intensity R&D activity is supported by the generous carryover provisions, which provide a “safety net” for the $15.3 billion in venture capital investment that flowed into the state in 2023.3

Impact on Life Sciences

The life sciences sector, a primary user of the § 38M credit, has seen a significant recovery and expansion post-COVID-19, with job growth occurring in nine of eleven innovation sectors.3 The ability to carry forward unused credits indefinitely (under the 75% rule) allows these firms to maintain high levels of academic and industrial R&D funding, which reached $44.9 billion in 2021.3

Comparison with Federal and Peer State Carryovers

The Massachusetts carryover system is distinct in its duration and its treatment of utilization caps compared to the federal government and other high-tech states.

While California offers a broader indefinite carryforward for all research credits, the Massachusetts “hybrid” model (fifteen years for unused, indefinite for disallowed) specifically targets the fiscal friction caused by utilization caps.1 This reflects a more tailored policy approach aimed at balancing long-term corporate support with the state’s need for predictable annual revenue.

2024 and 2025 Legislative and Administrative Updates

Recent updates have refined the research credit’s application without altering its core carryover structure.

Financial Institutions (TIR 25-3)

TIR 25-3, issued in May 2025, confirms that financial institutions are eligible for the § 38M research credit, resolving previous ambiguity regarding their status under the corporate excise.1 This expansion allows banks and financial technology firms with substantial Massachusetts-based R&D operations to begin generating and carrying forward research credits under the same rules as traditional manufacturing or technology corporations.1

Mandatory Capitalization (IRC § 174)

Recent federal changes requiring the capitalization and amortization of research and experimental expenditures under IRC § 174 have created a divergence in how “expenses” are treated for income purposes vs. “expenses” for credit purposes.29 Massachusetts generally conforms to the federal definitions of QREs for the credit calculation, but the timing of deductions may vary.1 These changes do not directly impact the fifteen-year carryover period, but they do increase the complexity of tax planning for companies seeking to optimize their overall effective tax rate.29

Summary and Practical Recommendations

The Massachusetts Research and Development tax credit carryover system is a pillar of the state’s fiscal policy for innovation. It provides a fifteen-taxable-year window for standard unused credits and an indefinite carryforward for credits disallowed by the seventy-five percent utilization cap.1

To maximize the benefit of these provisions, businesses should:

1. Perform Annual Comparative Analysis: Calculate the credit using both the Regular and ASC methods to determine which produces the higher current-year credit and subsequent carryover.1
2. Separate Carryover Tracking: Maintain distinct ledgers for “Fifteen-Year” carryovers and “Indefinite” carryforwards to ensure compliance with the FIFO utilization rules of Directive 88-23.1
3. Optimize Group Sharing: Within combined groups, strategically allocate current-year credits to members with the highest excise liabilities to maximize immediate utilization while preserving carryovers at the individual member level.5
4. Prioritize Documentation: Implement digital record retention policies that span the entire fifteen-year lifecycle of the carryover to survive DOR audits of historical credit generation.1
5. Evaluate Life Science Certification: For firms in the biotech space, certification through the MLSC can transform a fifteen-year carryover into an immediate ninety percent cash refund.1

Conclusion

The Massachusetts Research Credit’s carryover provisions represent a sophisticated intersection of tax law and economic development policy. By granting a fifteen-year horizon for unused credits and an indefinite lifespan for those limited by statutory caps, the Commonwealth acknowledges the long-term, high-risk nature of technological innovation.1 This framework provides companies with the necessary certainty to commit to multi-year research projects in Massachusetts, knowing that the fiscal benefits generated today will remain available for application against the profits of tomorrow. As the innovation economy continues to evolve, these provisions remain a critical tool for maintaining the state’s competitive edge in the global market for research and development.

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