The Evolution and Technical Architecture of Internal Revenue Code Section 174

Internal Revenue Code (IRC) Section 174 was first established as part of the Internal Revenue Code of 1954 to resolve pervasive ambiguity regarding the tax accounting of research and development costs. Prior to its enactment, the distinction between research expenditures that could be currently deducted as ordinary and necessary business expenses and those that were required to be capitalized as assets with a determinable useful life was often the subject of significant litigation. Section 174 effectively streamlined this process by offering taxpayers the choice to either immediately expense research and experimental (R&E) costs under Section 174(a) or to elect to capitalize and amortize them over a period of not less than 60 months under Section 174(b). This “expensing” option became the cornerstone of American innovation policy for over sixty years, providing immediate liquidity to businesses investing in technological advancement.

The landscape was fundamentally altered by the Tax Cuts and Jobs Act (TCJA) of 2017, which introduced a mandatory capitalization and amortization regime as a revenue-generating mechanism to offset broader corporate tax rate reductions. For tax years beginning after December 31, 2021, the TCJA mandated that “specified research or experimental” (SRE) expenditures be capitalized and amortized ratably over a five-year period for domestic research or a fifteen-year period for research conducted outside the United States. This shift from immediate expensing to mandatory amortization significantly increased the current-year tax burden for innovative companies, particularly those in the technology and life sciences sectors.

The recent passage of the One Big Beautiful Bill Act (OBBBA) in July 2025 has introduced another layer of complexity by restoring the ability of taxpayers to immediately deduct domestic R&E expenditures through the creation of a new code section, IRC Section 174A. This legislation allows for the full expensing of domestic research costs for tax years beginning after December 31, 2024, while retaining the 15-year amortization requirement for foreign research under Section 174. Furthermore, the OBBBA provides “catch-up” provisions for the 2022–2024 period, allowing small businesses to retroactively deduct domestic R&E expenditures that were previously capitalized.

The Texas Context: Divergent Conformity and Subchapter M

The application of Section 174 to the Texas Research and Development Tax Credit is governed by the state’s choice of Internal Revenue Code conformity dates. Unlike many states that utilize “rolling” conformity—automatically adopting federal changes as they occur—Texas has historically utilized “static” conformity for the purposes of the R&D credit. Under the current framework found in Texas Tax Code Chapter 171, Subchapter M, the definition of the Internal Revenue Code is fixed to the version of the code in effect on December 31, 2011.

This 2011 baseline is critical because it means that for current Texas franchise tax reports, the mandatory capitalization requirements introduced by the TCJA in 2022 do not apply at the state level. For the purpose of calculating the Texas R&D credit, research and experimental expenditures are treated as currently deductible expenses, following the pre-TCJA version of Section 174. This creates a temporary but significant divergence where a taxpayer may be capitalizing costs for their federal income tax return while simultaneously claiming those same costs as current-period qualified research expenses (QREs) for their Texas franchise tax report.

Defining Qualified Research and Expenses in Texas

In the Texas tax landscape, the terms “qualified research” and “qualified research expense” are explicitly defined by referencing IRC Section 41, provided that the research is conducted within the boundaries of Texas. IRC Section 41(d)(1)(A), in its 2011 form, specifies that research must be of a type for which expenditures may be treated as expenses under Section 174 to be considered “qualified research”. Consequently, Section 174 acts as the “gatekeeper” for the Texas credit; if a cost does not meet the criteria for a research or experimental expenditure under Section 174, it cannot qualify as a QRE for the Texas R&D credit.

The Texas incentive program offers a choice between two primary benefits, provided that the taxpayer does not claim both for the same period:

• A franchise tax credit based on qualified research expenses that exceed a historical base amount.
• A sales and use tax exemption on the purchase, lease, or rental of depreciable tangible personal property “directly used” in qualified research.

Detailed Analysis of Texas Revenue Office Guidance

The Texas Comptroller of Public Accounts provides authoritative guidance on the interaction between Section 174 and the state’s R&D incentives through policy memoranda and administrative rules. These interpretations often highlight areas where Texas law departs from standard federal practice or where federal regulations adopted after the 2011 conformity date are not recognized.

The Exclusion of Depreciable Property from Supply QREs

One of the most critical interpretations provided by the Texas Comptroller involves the classification of supplies. Under IRC Section 41(b)(2)(C), the term “supplies” is defined as any tangible property other than land or improvements and “property of a character subject to the allowance for depreciation”. In a pivotal memorandum issued on March 24, 2025, the Comptroller clarified that if an expense is for property that is depreciable under IRC Section 167, it cannot be considered a “supply” QRE, even if that expense is allowed as a deduction under Section 174.

This guidance was issued in response to taxpayer arguments that costs for items like pilot models or prototypes, which might be expensed under Section 174, should automatically be eligible for the R&D credit as supplies. The Comptroller’s position is that qualification as a Section 174 expense is a “necessary, but not sufficient” condition for the R&D credit; the expense must also satisfy the independent requirements of Section 41, which specifically excludes depreciable property from being treated as a supply. Therefore, while a business may expense the cost of developing a prototype for federal purposes, if that prototype has a useful life of more than one year and is of a character subject to depreciation, its material costs are excluded from the Texas R&D credit.

Disregard of Federal Intra-group Transaction Rules

The Texas Comptroller has also clarified that federal regulations concerning intra-group transactions (Treas. Reg. Section 1.41-6(i)) do not apply when determining the Texas R&D credit. For federal purposes, members of a “controlled group” are treated as a single taxpayer, and intercompany transfers or payments for research are generally disregarded to prevent the artificial inflation of the credit.

However, the Comptroller noted that the structural definitions of a Texas “combined group” and a federal “controlled group” are fundamentally different. A federal group is often much broader than a Texas unitary group. Consequently, a transaction that is eliminated for federal purposes—such as a payment from a parent company to a subsidiary for R&D services—may be recognized as a valid contract research expense for the Texas credit if the two entities are not part of the same Texas combined group. This can result in a taxpayer reporting more Texas QREs than federal QREs on their respective returns.

Technical Definitions: Specified Research or Experimental (SRE) Expenditures

The scope of expenditures subject to Section 174 has expanded over time, particularly following the TCJA. For the purpose of federal capitalization and state credit qualification, costs must be incurred “in connection with the taxpayer’s trade or business” and represent research and development costs in the “experimental or laboratory sense”.

Core Qualifying Costs

Expenditures generally qualifying under Section 174, and thus potentially eligible for the Texas R&D credit if they meet the additional Section 41 criteria, include:

• Salaries and Wages: Compensation for employees performing, supervising, or directly supporting research activities.
• Contract Research: Payments to third parties to perform research on the taxpayer’s behalf, where the taxpayer retains substantial rights and bears the economic risk of failure.
• Materials and Supplies: Non-depreciable tangible property consumed during the research process.
• Patent Costs: Legal fees and filing fees associated with making and perfecting a patent application.
• Software Development: Specifically mandated for Section 174 treatment by the TCJA and recognized under the 2011 Texas conformity rules for software intended for sale or certain internal-use software.

Non-Qualifying Costs

Certain activities are explicitly excluded from Section 174 and Section 41 eligibility:

• Market Research: Advertising, consumer surveys, and sales promotions.
• Quality Control: Ordinary testing or inspection of materials or products for quality control after the elimination of uncertainty.
• Social Sciences: Research in the social sciences, arts, or humanities.
• Foreign Research: Research conducted outside the United States, Puerto Rico, or U.S. possessions (though foreign costs must still be capitalized for federal purposes under Section 174).

Software Development and Internal Use Software Nuances

The treatment of software development costs is one of the most significant intersections of Section 174 and the Texas credit. Under the 2011 version of the IRC adopted by Texas, software development costs generally qualify if the development involves a process of experimentation intended to resolve technological uncertainty.

However, “internal-use software” (IUS)—software developed by a taxpayer primarily for use in its own administrative or back-office functions—is subject to a higher standard of qualification. For IUS to qualify for the R&D credit under the 2011 rules, it must typically satisfy the “innovation test,” the “significant economic risk test,” and the “commercial availability test”. The Comptroller has been particularly active in auditing IUS claims to ensure they meet these stringent criteria, often citing the 2011 regulatory standards as the basis for disallowance.

The 2026 Legislative Transformation: Senate Bill 2206

A landmark shift in Texas tax policy was initiated with the signing of Senate Bill (SB) 2206 on June 22, 2025. Effective for franchise tax reports originally due on or after January 1, 2026, the legislation repeals the existing Subchapter M credit and the Section 151.3182 sales tax exemption, replacing them with a modernized and enhanced franchise tax credit under a new Subchapter T.

Transition to Rolling Conformity

The most significant change introduced by SB 2206 is the transition from static 2011 conformity to “rolling” conformity. Under the new law, the Texas R&D credit will be directly tied to the amount reported on line 48 of federal Form 6765, Credit for Increasing Research Activities, for the specific tax year in question. This means that Texas will automatically follow the current federal definitions of qualified research and expenses, including the OBBBA’s restoration of expensing under Section 174A and any future IRS guidance or audit outcomes.

Enhanced Credit Rates and Refundability

To improve Texas’s competitive position, SB 2206 substantially increases the credit rates and introduces limited refundability for small and startup businesses.

Under the new regime, entities that are not required to pay franchise tax—such as those below the “no tax due” threshold (currently $2.47 million in annual revenue) or new veteran-owned businesses—can apply for a refund of the credit amount. This is a major departure from prior law, which only allowed the credit to offset up to 50% of the franchise tax actually due, often rendering the credit useless for pre-revenue startups.

Administrative Procedures and Reporting

Claiming the Texas R&D tax credit requires rigorous adherence to state-specific documentation and filing requirements. The Comptroller’s office utilizes the franchise tax report as the primary mechanism for claiming the credit.

Filing Requirements

Taxpayers must complete several forms to substantiate a credit claim on their franchise tax report:

• Long Form Franchise Tax Report (05-158-A and 05-158-B): The primary report for taxable entities exceeding the revenue threshold.
• Credits Summary Schedule (05-160): A schedule aggregating all available tax credits, including the R&D credit.
• Research and Development Activities Credits Schedule (05-178): The dedicated form for calculating current-year QREs and comparing them against the three-year historical base.

The Three-Year Base Period Calculation

The Texas credit is an incremental benefit, meaning it is calculated based on the increase in research spending. The credit applies to the difference between current-year Texas QREs and 50% of the average QREs incurred during the three preceding tax periods. If a business does not have a three-year history of research in Texas, it skips the base calculation and applies a reduced “base rate” (e.g., 4.361% under SB 2206) to its total current-year Texas QREs.

Audit and Amended Reports

The new rolling conformity laws mandate that if a taxpayer’s federal QREs are changed as a result of an IRS audit or an amended federal return, the taxpayer must file an amended Texas franchise tax report within a specified period. This ensures that the state and federal credits remain aligned, but it also creates a streamlined pathway for taxpayers to recognize federal audit settlements at the state level without undergoing a full secondary audit by the Texas Comptroller.

Case Study: Application of Section 174 to a Texas Developer

To illustrate the interplay between federal Section 174 and the Texas R&D credit, consider the following example of a Texas-based technology firm, “Lone Star Avionics.”

Scenario Overview (Tax Year 2024)

Lone Star Avionics is developing a new flight control system. In 2024, the company incurs the following costs in Texas:

1. Engineering Salaries: $1,000,000.
2. R&D Supplies: $200,000 (consumable materials).
3. Prototype Tooling: $300,000 (specialized equipment with a 3-year useful life).
4. Contract Research: $200,000 paid to a local university.
5. Average QREs (2021-2023): $800,000.

Federal Treatment (Section 174 Amortization)

Under the TCJA (applicable for 2024), Lone Star must capitalize the full $1.7 million in research costs. For 2024, they can only deduct one-tenth of the total (using the half-year convention for a 5-year amortization period):

• Federal Deduction: $1,700,000 / 5 years * 0.5 = $170,000.

Texas Treatment (Subchapter M Credit)

Because Texas is tied to the 2011 IRC for the 2024 report, it ignores the federal amortization requirement and treats the costs as currently deductible.

Step 1: Identify Qualified Research Expenses (QREs):

• Wages: $1,000,000 (Qualified).
• Supplies: $200,000 (Qualified).
• Prototype Tooling: $0. Under Comptroller guidance, this property is “of a character subject to depreciation” and is excluded from supply QREs, even if Section 174 allows it to be expensed.
• Contract Research: $200,000 * 65% = $130,000 (Qualified, assuming university contract qualifies for standard rate under pre-2026 rules).

Total 2024 Texas QREs = $1,330,000.

Step 2: Calculate the Base Amount:

• Base Amount = 50% * $800,000 (average of prior 3 years) = $400,000.

Step 3: Calculate the Credit:

• Credit Base = $1,330,000 (current) – $400,000 (base) = $930,000.
• Credit Amount (5% rate) = $930,000 * 0.05 = $46,500.

Strategic Impact of the 2026 Change

If Lone Star Avionics performs this same work in 2026, the benefit increases substantially. Under SB 2206:

• Rolling Conformity: If the $300,000 for tooling is accepted as a QRE on line 48 of the federal Form 6765, Texas would now recognize it, overriding the previous Comptroller guidance on depreciable supplies.
• Increased Rate: The university research would likely qualify for the 10.903% rate.
• Standard Rate: The remaining research would qualify for the 8.722% rate.

Economic and Strategic Implications for Texas Businesses

The interaction between Section 174 and the Texas tax landscape has profound implications for corporate strategy and cash flow management.

Impact on Cash Flow and Valuation

The mandatory federal amortization under Section 174 (from 2022 to 2024) created significant “phantom” income for technology companies, as they were required to pay taxes on revenue that was offset by actual research expenditures that could not be fully deducted. For Texas companies, the state R&D credit became a vital tool to mitigate this federal tax drag. Because the Texas credit calculation remained decoupled from federal amortization, companies could use the state credit to offset a portion of their increased federal liability, preserving cash for continued innovation.

Shift in Equipment Acquisition Strategy

With the repeal of the Texas sales tax exemption in 2026, businesses must re-evaluate their equipment purchasing schedules. In 2025, a company can still obtain a 6.25% (state) plus local sales tax savings on R&D equipment. In 2026, they will instead pay the sales tax but may receive an 8.722% credit on the purchase price if it qualifies as a QRE on federal Form 6765. For most companies, the permanent increase in the credit rate and the broader definitions under rolling conformity will more than compensate for the loss of the sales tax exemption, particularly for software-centric firms with minimal equipment costs.

Documentation and Compliance Burdens

The transition to rolling conformity in 2026 is intended to reduce the “book-to-tax” and “federal-to-state” reconciliation requirements for tax departments. Historically, a Texas R&D study required a separate analysis to exclude costs that were not recognized under the 2011 IRC baseline. Moving forward, the primary compliance hurdle will be ensuring that the federal Form 6765 is bulletproof, as any federal adjustment will now automatically flow through to the Texas franchise tax report.

Inter-State Competition and the Texas Advantage

The enhancement of the Texas credit via SB 2206 was a direct response to legislative actions in other states. For example, Iowa recently overhauled its R&D credit, and Michigan enacted a new program in early 2025. By making the credit permanent and raising the rate to 8.722%, Texas has positioned itself in the upper tier of state incentives, trailing only a few states with refundable credits but offering the advantage of being situated in a state with no corporate or personal income tax.

The permanence of the Texas credit is a critical factor for long-term capital investments. Research cycles in sectors like biotechnology or semiconductor manufacturing can span a decade; the knowledge that the state incentive will not expire in 2026 provides the certainty required for major site selection decisions.

Final Thoughts: The Future of R&D in Texas

The role of IRC Section 174 in the Texas tax framework is transitioning from a point of divergence to a point of convergence. During the 2022–2025 window, taxpayers must navigate the complex “gap” between federal amortization and the Texas 2011-conformity expensing rules. However, the comprehensive overhaul triggered by SB 2206 will effectively align Texas with the modern federal standard, adopting the restored expensing of Section 174A and the broader definitions of the current IRC.

This alignment, combined with a 74% increase in the base credit rate (from 5% to 8.722%) and the introduction of refundability for startups, marks a paradigm shift in how Texas supports innovation. Businesses must remain vigilant during the 2025 transition year, ensuring that equipment purchases are optimized to capture the final year of the sales tax exemption while preparing their systems for the rolling conformity and amended report mandates of the new Subchapter T. Ultimately, the integration of Section 174 into Texas law has evolved into a powerful, permanent, and simplified mechanism for technological leadership in the state.