The New Hampshire Research and Development Tax Credit: An Analytical Report on the 5-Year Maximum Credit Carryover Period

The New Hampshire Research and Development (R&D) tax credit carryover allows businesses to apply unused awarded credits against tax liabilities for up to five years. This provision ensures that nonrefundable credits not exhausted in the year of the award remain available to offset future Business Profits and Business Enterprise Taxes.

Conceptual Foundation and Statutory Construction

The New Hampshire Research and Development (R&D) tax credit, codified under RSA 77-A:5, XIII, represents a deliberate legislative effort to foster a robust industrial ecosystem by subsidizing the most significant cost of innovation: human capital.1 At its core, the statute incentivizes “qualified manufacturing research and development expenditures” incurred within the borders of the state.1 Unlike the federal R&D tax credit, which provides a broader scope of eligible expenses including supplies and contract research, the New Hampshire variant is strictly limited to wages paid to employees for services rendered in-state.4 This narrow focus serves a dual purpose: it encourages the hiring of high-skilled technical workers in New Hampshire and ensures that the fiscal benefit of the credit is tied directly to local employment.1

The “Maximum Credit Carryover Period” of five tax years is the legal mechanism that transforms a nonrefundable tax credit into a long-term financial asset for a business.3 Because the credit is nonrefundable, it cannot be paid out as a tax refund if a company’s tax liability is less than the credit amount.3 Without a carryover provision, the incentive would be effectively useless for early-stage manufacturers or companies undergoing significant capital investment phases where profits—and thus tax liabilities—are minimal or nonexistent.3 The five-year window provides a realistic timeframe for a research-intensive project to move from the laboratory or prototype stage into a revenue-generating production stage where the business can finally leverage the tax relief.7

The statutory language of RSA 77-A:5, XIII(a)(2) is precise: “Each credit shall be used to offset the taxpayer’s tax liability within the subsequent 5 tax years”.1 This phrasing establishes the carryover not as an indefinite right, but as a time-bound opportunity that requires careful strategic planning. The “clock” on this five-year period does not necessarily start the moment the research occurs, but rather is tied to the administrative cycle of application and award managed by the Department of Revenue Administration (DRA).4

Defining Qualified Manufacturing Research and Development Expenditures

To understand the carryover, one must first identify the nature of the expenditures that generate the credit. New Hampshire law defines these expenditures solely as wages paid to employees for services rendered within the state, provided those wages meet the federal definition of qualified research under Section 41 of the Internal Revenue Code (IRC).1 This federal-state link ensures that the activities being subsidized meet rigorous national standards for scientific and technological innovation.1

The requirement that these activities be “manufacturing” in nature is a critical distinction.1 The services must be undertaken for the purpose of discovering information that constitutes qualified research and development of a new or improved manufacturing process or business component.1 This emphasizes the state’s focus on tangible production and process improvement within its industrial base.3

The Mechanics of the Five-Year Carryover Provision

The carryover mechanism operates as a rolling window. For any given tax year, a business may have a “stack” of carryover credits originating from different prior award years.11 The administration of these credits follows a first-in, first-out (FIFO) logic, although the primary tracking mechanism is the total remaining balance reported on the taxpayer’s Schedule of Credits.11

The Administrative Cycle: From Application to Carryover

The lifecycle of the credit begins with the filing of Form DP-165, the Research & Development Tax Credit Application.7 This application must be postmarked no later than June 30 following the taxable period during which the research occurred.4 The DRA then undergoes a review process, certifying the final award amounts by September 30 of the same year.1

Once the award letter is received, the taxpayer has a “certified” credit amount.4 The five-year carryover period begins with the subsequent tax year.1 If a company receives an award letter in September 2025 for research conducted in 2024, the “subsequent 5 tax years” generally refers to the tax years ending in 2025, 2026, 2027, 2028, and 2029.1

Interaction with the Dual Tax Structure: BPT and BET

A unique aspect of New Hampshire’s business tax environment is the dual-tax system, comprising the Business Profits Tax (BPT) and the Business Enterprise Tax (BET).3 The R&D credit is designed to interact with both, but in a specific sequence mandated by the DRA.3

1. Business Profits Tax (BPT) Offset: The credit must first be applied against the BPT liability.3 The BPT is an income-based tax, currently set at a rate that has seen incremental reductions over recent years.14
2. Business Enterprise Tax (BET) Offset: If the credit exceeds the BPT liability, the remainder may be applied against the BET.3 The BET is assessed on the “enterprise value base,” which includes compensation, interest, and dividends paid by the business.10
3. Carryover Generation: Any amount of the credit that remains after exhausting both the BPT and BET liabilities for the current period is then designated as the carryover for future periods.2

This sequential application is vital for different organizational structures. For example, a C-Corporation with high profits would likely exhaust its R&D credit against the BPT immediately.11 Conversely, a capital-intensive manufacturing startup structured as an LLC might have high BET (due to compensation and interest on debt) but zero BPT (due to initial losses).7 The carryover provision ensures that this LLC can use its credit to offset BET in the near term and BPT in the long term as it matures into profitability.7

Administrative Guidance from the Department of Revenue Administration

The New Hampshire Department of Revenue Administration (DRA) provides clarity on the carryover rules through Technical Information Releases (TIRs), administrative rules, and form instructions.2 These documents serve as the definitive guide for practitioners and taxpayers to ensure compliance and avoid the forfeiture of credits.6

Key Technical Information Releases (TIRs)

Several TIRs have shaped the modern understanding of the R&D credit and its carryover provisions.

• TIR 2007-007: This was the foundational release following the enactment of the credit in 2007.2 it established the initial $1 million aggregate cap and the $50,000 individual taxpayer cap.6 Crucially, it confirmed that “unused portions of the credit may be carried forward for up to 5 years” and established the BPT-then-BET application order.6
• TIR 2013-001: This release documented the legislative increase of the aggregate cap to $2 million and, significantly, repealed the prospective sunset date of the credit, making it a permanent part of the New Hampshire tax code.2 For taxpayers, “permanence” meant that the 5-year carryover window became a reliable fixture in long-term financial modeling.3
• TIR 2015-005: This release addressed House Bill 2, which increased the total aggregate award to $7 million effective July 1, 2017.2 It reiterated that the credit is first applied to BPT and then the unused portion to BET, further solidifying the sequential application rules that define how carryovers are calculated.13

Administrative Rules and Form DP-160

The New Hampshire Administrative Code, specifically § Rev 2406.05, provides the regulatory framework for the credit.2 The rules clarify that the credit is nonrefundable and specify that any overpayment resulting from the application of the credit to quarterly estimated payments may be requested as a refund, but the credit itself cannot exceed the tax liability.10

The practical tracking of the 5-year carryover is performed on Form DP-160, the Schedule of Credits.11 Section C of this form requires taxpayers to account for their R&D credit usage through a step-by-step mathematical logic:

This systematic tracking is essential because it provides the “audit trail” that the DRA uses to verify the validity of carryover claims in subsequent years.3

Interaction with the Business Profits Tax and Business Enterprise Tax

The carryover’s value is inherently linked to the rates and structures of the BPT and BET. As these tax rates fluctuate due to legislative changes, the “purchasing power” of a carryover credit also changes.14

The Business Profits Tax (BPT) Context

The BPT is historically one of the largest sources of New Hampshire’s general fund revenue.14 Since 2016, the state has engaged in a series of rate reductions.14 For example, the rate was 8.2% for periods ending on or after December 31, 2016, and has incrementally decreased to 7.6% for periods ending on or after December 31, 2022.14

From an analytical perspective, a lower BPT rate means that a company needs higher profits to generate the same tax liability.17 This increases the likelihood that a taxpayer will not be able to fully utilize a $50,000 R&D credit in a single year, thereby making the 5-year carryover period more critical.3 If a company’s BPT liability drops due to rate reductions, the credit balance that “spills over” into the BET or future carryover years necessarily increases.15

The Business Enterprise Tax (BET) and the “Cascading” Effect

The BET serves as a second layer of taxation where the R&D credit can be applied.3 However, the New Hampshire tax code contains a “cascading credit” concept that the R&D credit does not follow, which has significant implications for carryover strategy.15

In New Hampshire, the BET paid is normally allowed as a credit against the BPT.11 This is known as the “BET Credit”.18 However, when a taxpayer uses a non-cascading credit like the R&D credit to offset their BET liability, that offset portion is not considered “taxes paid” for the purpose of the BET-against-BPT credit.15

This distinction means that tax professionals must carefully model whether it is more beneficial to use the R&D carryover to offset BET or to save it for a future year’s BPT liability.11 Because the R&D credit is first applied to BPT, the law essentially forces the most efficient usage first, but the spillover into BET and then into the 5-year carryover pool requires diligent multi-year planning.3

Quantitative Analysis of Program Utilization and Economic Impact

The utilization of the R&D tax credit has become a stable metric in New Hampshire’s fiscal landscape. Data from the DRA’s annual “Tax Expenditure and Potential Liability Reports” provide insights into how many businesses are carrying forward these credits and the total fiscal impact on the state.15

Fiscal Year 2020–2024 Utilization Trends

The following table synthesizes the reported usage of the R&D tax credit over the most recent five-year period for which comprehensive data is available.

This data reveals several second-order insights:

1. Cap Proximity: The 2024 utilization of $6.186 million is nearing the $7 million aggregate program cap.15 This suggests that as more taxpayers apply, the likelihood of proration increases.3 Proration reduces the initial award, which in turn reduces the amount available for the 5-year carryover.3
2. Breadth of Participation: The increase to 271 taxpayers in 2024 represents a 26% growth in participation over 2023.15 This indicates that the credit is successfully reaching a wider array of New Hampshire manufacturers, likely including smaller firms that may rely more heavily on the carryover provision as they scale.3
3. Volatility of Usage: The drop in 2023 utilization followed by the surge in 2024 highlights the “indeterminable” nature of credit timing that the DRA notes in its fiscal analyses.9 Because credits can be carried forward for five years, the amount claimed in any single year is not just a reflection of that year’s R&D, but a combination of that year’s award and the “harvesting” of carryovers from the previous four years.15

Economic Revitalization Zone (ERZ) Interaction

The R&D tax credit does not exist in a vacuum; it must be coordinated with other state incentives. Notably, RSA 162-N:7 provides for the Economic Revitalization Zone Tax Credit.2 The law explicitly states that wages for which a research and development credit is taken shall not also be eligible for the ERZ credit.1

From a carryover perspective, this creates a strategic decision point for manufacturers located in designated revitalization zones.3 The ERZ credit is also nonrefundable and has its own 5-year carryover period, but it is capped at $40,000 per year.11 Businesses must determine which credit offers a more certain path to utilization within their respective 5-year windows.3 Because the R&D credit is specifically for manufacturing wages and the ERZ credit is for general job creation in specific zones, a high-tech manufacturer might find the R&D credit more lucrative but may choose the ERZ credit if their R&D activities are expected to decrease while their general headcount increases.3

Procedural Compliance and Documentation Standards

The five-year carryover is a significant benefit, but it carries a high burden of proof. The DRA has the authority to audit these credits, and because a carryover can span five years, the “relevant” documentation may date back significantly longer than a standard tax return.3

The Application Process: Form DP-165

Successful utilization of the carryover begins with a perfect application. Form DP-165 requires the attachment of Federal Form 6765.4 If a business is filing on extension and does not have a final Federal Form 6765 by the June 30 deadline, the DRA allows for the submission of a “pro-forma” or draft copy.3 Failure to include this document will result in the application being considered incomplete, potentially forfeiting the credit and any future carryover for that expenditure year.4

Taxpayers must also provide:

• A clear breakdown of New Hampshire-specific wages versus total federal qualified wages.12
• The taxpayer’s name, address, and identification number (FEIN, SSN, or DIN).12
• Verification that the wages have not been claimed for the Economic Revitalization Zone Tax Credit.1

Documentation for Multi-Year Carryovers

Because the credit is for “manufacturing research,” the DRA looks for evidence that the activities meet the technological and experimental requirements of the law.5 For a business carrying a credit balance into the fourth or fifth year of its carryover period, maintaining a contemporaneous record is vital.7

These records should be maintained for at least the duration of the carryover period plus the statute of limitations for the year in which the final portion of the carryover is used.3 In practice, this can mean keeping records for up to nine years for a single year’s research expenditure.

Practical Example: Multi-Year Credit Management

To illustrate the interplay of the $50,000 cap, the proration mechanism, and the 5-year carryover, consider the case of “Granite State Electronics,” a mid-sized manufacturer.

Year 1: Research and Award

In 2024, Granite State Electronics pays $800,000 in qualifying R&D wages. Their base amount is $300,000.

• Excess Wages: $500,000.
• Calculated Credit (10%): $50,000.3
• Award Scenario: Due to high statewide demand, the DRA prorates all awards by 90%.
• Final Awarded Credit: $45,000.3

Year 2: Initial Application

In the tax year ending December 31, 2025 (the first year after the research), the company has the following tax profile:

• BPT Liability: $5,000.
• BET Liability: $10,000.
• R&D Usage: The $45,000 award is first used to eliminate the $5,000 BPT, then used to eliminate the $10,000 BET.3
• Carryover to Year 3: $30,000 remains.11

Year 3 through Year 7: The Carryover Window

The company enters a period of heavy reinvestment and reports tax losses for several years.

In Year 6 (the fifth subsequent year), Granite State Electronics finally exhausts the remaining $3,000 balance.1 If any portion had remained unused after Year 6, it would have expired on the first day of Year 7 (2030).3 This example demonstrates how a single $45,000 award can provide tax relief across five different tax filing periods, smoothing the company’s cash flow during its reinvestment phase.

Future Legislative Trajectories and Senate Bill 276

The New Hampshire R&D tax credit is currently undergoing legislative scrutiny that could significantly alter the “value proposition” of the 5-year carryover. Senate Bill 276 (SB 276), introduced in the 2025 session, proposes a substantial expansion of the program.9

Expansion of Caps under SB 276

SB 276 seeks to increase both the aggregate and individual taxpayer limits, effective January 1, 2026.9

• Aggregate Statewide Cap: Proposed increase from $7,000,000 to $10,000,000.9
• Individual Taxpayer Cap: Proposed increase from $50,000 to $100,000.9

From a policy analysis standpoint, doubling the individual cap to $100,000 would create much larger carryover balances for many firms.20 A manufacturer that typically only has $60,000 in total tax liability (BPT + BET) would now have a $40,000 carryover entering their 5-year window, whereas under current law, their $50,000 credit would be fully utilized in the first year.3

Fiscal Impact and Predictability

The DRA’s fiscal note on SB 276 highlights the inherent tension between taxpayer flexibility (the carryover) and state budget predictability.9 The Department notes that increasing the credit will result in an “indeterminable decrease to state business tax revenues” precisely because taxpayers can time the usage of their credits within the 5-year carryover period.9

The maximum possible impact in the first year of the increase is estimated at $3,000,000 (the difference between the $7M and $10M caps), but the actual impact in subsequent years is impossible to calculate due to the “banking” of credits in the carryover pool.9 This suggests that for the State of New Hampshire, the 5-year carryover acts as a “potential liability” that must be certified by the Commissioner to the Governor and the General Court annually under RSA 71-C.15

Synthesis and Conclusion

The New Hampshire Research and Development tax credit, with its 5-year maximum credit carryover period, is a sophisticated fiscal tool designed for the specific needs of the manufacturing sector.3 By linking state incentives to the rigorous federal definitions of IRC Section 41 while narrowing the focus to in-state wages, New Hampshire has created a credit that is both targeted and manageable.1

The carryover provision is the linchpin of this program, acknowledging that the path from technological uncertainty to commercial profitability is rarely linear.5 It allows businesses to “bank” their innovation incentives during lean years and deploy them as they scale.3 However, this flexibility comes with administrative responsibilities, requiring taxpayers to navigate the sequential application to BPT and BET, maintain multi-year documentation for potential audits, and closely monitor the 5-year expiration clock.3

As utilization grows and the state considers expanding the credit via SB 276, the role of the carryover will only become more central to business tax strategy in the Granite State.9 For manufacturers, the 5-year window represents more than just a tax break; it is a five-year commitment from the state to support the high-wage, high-skill activities that define the future of New Hampshire industry.3 Final award notifications by September 30 serve as the starting gun for a five-year race to optimize tax positions, a process that requires precision, compliance, and long-term vision.1

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