Qualified Research (IRC § 41(d) Definition)

Qualified research under Internal Revenue Code Section 41(d) defines activities undertaken to discover technological information for developing new or improved business components through a process of experimentation. In the context of the Texas Research and Development tax credit, this federal definition is adopted and restricted to activities conducted physically within the state of Texas to determine eligibility for franchise tax credits or sales tax exemptions.

The integration of federal tax standards into state-level incentives represents a sophisticated alignment of economic policy and scientific advancement. Internal Revenue Code (IRC) Section 41, originally enacted at the federal level to stimulate domestic innovation, provides a rigorous framework that taxpayers must navigate to secure financial benefits for their research and development (R&D) investments. Texas, historically a leader in fostering a business-friendly environment, adopted these standards under Texas Tax Code Chapter 171, Subchapter M, and has recently evolved this framework through the permanent expansion under Subchapter T via Senate Bill 2206. This transition marks a significant shift in how the state defines, audits, and incentivizes innovation, moving from a fixed-date adoption of federal law to a rolling conformity model that seeks to reduce administrative friction for taxpayers.

The Federal Foundation: Deconstructing the Four-Part Test of IRC Section 41(d)

To understand the Texas R&D landscape, one must first master the federal “Four-Part Test” established under IRC Section 41(d). This test serves as the fundamental gatekeeper for all qualified research activities, designed to distinguish between routine engineering or periodic maintenance and the high-level experimentation that merits a government subsidy. Each of the four elements must be met for a project to be considered “qualified research.” If an activity fails even one of these tests, the associated expenses are disqualified from the credit calculation, regardless of the technological sophistication involved.

The Business Component and Permitted Purpose Test

The first requirement of the test dictates that the research must be undertaken for a “permitted purpose.” Specifically, the activity must relate to a new or improved business component’s functionality, performance, reliability, or quality. A “business component” is defined broadly as any product, process, computer software, technique, formula, or invention to be held for sale, lease, or license, or used by the taxpayer in their trade or business.

The permitted purpose test focuses on the objective of the research. It is not enough for a company to simply “improve” a product; the improvement must be functional in nature. This excludes activities directed toward style, taste, cosmetic, or seasonal design factors. For instance, a manufacturer redesigning a smartphone’s casing solely to change its color or texture would fail this test, whereas a redesign intended to dissipate heat more efficiently or increase structural integrity would satisfy the requirement. This distinction is critical in Texas industries such as consumer electronics and manufacturing, where aesthetic design is often intertwined with functional engineering.

The Elimination of Uncertainty Test

The second pillar of the definition is the elimination of uncertainty. The taxpayer must demonstrate that, at the outset of the research, the information available did not establish the capability of developing the component, the method for doing so, or the appropriate design of the result. Technical uncertainty is distinct from business or economic uncertainty; while a company might be uncertain if a product will be profitable or if it will meet market demand, such commercial concerns do not constitute technical uncertainty under Section 41.

Uncertainty exists if the information available to the taxpayer does not establish whether the taxpayer’s goals can be achieved (capability), how the goals will be achieved (methodology), or what the final configuration of the component should be (design). In many complex engineering fields prevalent in Texas, such as aerospace or deep-water oil exploration, uncertainty is often found in the “design” phase. A company may know it has the capability and method to build a subsea valve, but the appropriate design to withstand specific pressure and temperature variables may remain uncertain until experimental testing is complete.

The Process of Experimentation Test

The most scrutinized element during both federal and Texas state audits is the process of experimentation. This test requires that substantially all of the activities constitute a process designed to evaluate one or more alternatives to achieve a result where the capability, method, or design is uncertain. This process typically involves a systematic trial-and-error approach, modeling, simulation, or other scientific methods designed to resolve the identified technical uncertainty.

The “substantially all” requirement is generally interpreted by the IRS and the Texas Comptroller as meaning that 80% or more of the research activities must be part of this experimentation process. This creates a high evidentiary burden for taxpayers. They must maintain documentation that shows a hypothesis was formed, alternatives were considered, and testing was conducted to validate or refute the hypothesis. In the context of software development, this often involves the evaluation of different algorithms or architectures to determine which one meets performance requirements.

The Technological in Nature Test

The final element requires that the research fundamentally rely on the principles of the “hard sciences,” such as engineering, physical or biological sciences, or computer science. This ensures that the credit incentivizes genuine scientific and technological progress rather than advancements in the social sciences, arts, humanities, or business management, all of which are explicitly disqualified.

For a software project to be “technological in nature,” the process of experimentation must rely on computer science principles rather than mere data entry or routine programming. This requirement is particularly relevant in the Texas biotechnology and energy sectors, where research must be grounded in biological or physical sciences to qualify. Efficiency surveys, management studies, and market research are excluded because they rely on behavioral science rather than the hard sciences.

The Evolution of the Texas Research and Development Tax Credit

Texas introduced its R&D tax incentive program in 2014, allowing businesses to choose between a franchise tax credit and a sales tax exemption. The state’s approach has been characterized by a desire to remain competitive with other states while maintaining rigorous standards for qualification.

The Subchapter M Framework (2014–2025)

From its inception through the end of 2025, the primary vehicle for the credit has been Chapter 171, Subchapter M of the Texas Tax Code. Under Subchapter M, the state adopted the Internal Revenue Code as it existed on December 31, 2011. This “frozen” adoption created a significant disconnect between federal and state tax filings, as any federal updates or Treasury Regulations issued after 2011 did not apply to the Texas credit unless the Texas Legislature specifically acted to adopt them.

This period was marked by the “choice” mechanism: a person engaged in qualified research could claim either a sales and use tax exemption on depreciable tangible personal property directly used in research or a franchise tax credit based on qualified research expenses. However, the taxpayer could not claim both for the same period, necessitating an annual analysis to determine which benefit provided the maximum value.

The Subchapter T Transformation (Effective 2026)

In June 2025, Governor Greg Abbott signed Senate Bill 2206 (SB 2206), which fundamentally overhauls the Texas R&D credit landscape. Effective January 1, 2026, Subchapter M is repealed and replaced by Subchapter T. The new law makes several critical changes designed to streamline administration and increase the state’s attractiveness for R&D investment.

Feature	Subchapter M (Pre-2026)	Subchapter T (Post-2026)
Status	Scheduled to expire 12/31/2026	Permanent
Credit Rate	5% of excess QREs over base	8.722% of excess QREs over base
University Rate	6.25% of excess QREs over base	10.903% of excess QREs over base
IRC Conformity	Fixed as of 12/31/2011	Rolling conformity to current IRC
Benefit Structure	Choice of Credit or Sales Exemption	Credit only (Sales Exemption Repealed)
Refundability	Non-refundable	Refundable for entities with no tax due

The most significant policy shift is the move to “rolling conformity.” Under Subchapter T, the definition of Qualified Research Expenses (QREs) is directly tied to the amounts reported on Line 48 of IRS Form 6765 for research conducted in Texas. This eliminates the need for businesses to maintain two separate sets of books for federal and state R&D qualifications and ensures that Texas law automatically adjusts when the federal government updates its R&D standards.

Qualified Research Expenses: Identification and Calculation

To claim the credit, a taxpayer must accurately calculate their Qualified Research Expenses (QREs). Under both federal and Texas law, QREs are the sum of in-house research expenses and contract research expenses.

In-House Research Expenses

In-house expenses are categorized into three primary buckets: wages, supplies, and computer rental costs.

Qualified Wages

Wages paid to employees for “qualified services” constitute the largest portion of most R&D claims. Qualified services include:

1. Engaging in Qualified Research: The actual scientists, engineers, and developers performing the experimentation.
2. Direct Supervision: The immediate “first-line” managers who oversee the research. Higher-level executives and administrative managers generally do not qualify.
3. Direct Support: Individuals who support the researchers, such as a lab technician cleaning equipment or a machinist fabricating a prototype.

Texas follows the federal “substantially all” rule for wages: if an employee spends 80% or more of their time on qualified services, 100% of their taxable wages can be included in the QRE calculation.

Supplies and the Depreciable Property Conflict

Supplies include any tangible property used in the conduct of qualified research, provided the property is not land or improvements to land and is not of a character subject to the allowance for depreciation. This has been a point of significant friction between Texas taxpayers and the Comptroller.

In early 2025, the Texas Comptroller issued a policy memorandum clarifying that if an expense for property is allowed under IRC Section 174 (which is broader and allows for some depreciable items to be expensed), it cannot be considered a “supply” under Section 41 if it is fundamentally “depreciable property”. However, SB 2206 provides a legislative override: starting in 2026, expenses for supplies properly reported as QREs on federal Form 6765 may not be excluded by the Comptroller simply because they are taxable or exempt under the state’s sales and use tax.

Computer Rental and Cloud Computing

This category includes amounts paid to use computers in the conduct of qualified research. In the modern era, this largely applies to cloud computing costs (e.g., AWS, Azure) specifically dedicated to R&D processing or server lease costs for heavy computational modeling.

Contract Research Expenses

When a company hires an outside firm to perform research, it can generally claim 65% of the payments as QREs. To qualify, the contract must stipulate that the hiring company retains the “economic risk” (i.e., they pay even if the research fails) and “substantial rights” to the research results.

Under Subchapter T, the incentive to collaborate with Texas academia is significantly enhanced. Research conducted under contract with a public or private institution of higher education in Texas qualifies for an increased credit rate of 10.903%, compared to the standard 8.722%.

Local State Revenue Office Guidance: The Texas Comptroller’s Regulatory Framework

The Texas Comptroller of Public Accounts is the primary authority for administering the credit. The Comptroller’s interpretations are codified in the Texas Administrative Code (TAC), primarily Rules 3.599 (Franchise Tax) and 3.340 (Sales Tax).

The 2021/2022 Rule Amendments and the IUS Controversy

In late 2021 and August 2022, the Comptroller adopted extensive amendments to Rule 3.599 that caused significant controversy within the Texas business community. These amendments introduced a much more restrictive definition of “Internal Use Software” (IUS) and applied these rules retroactively to 2014.

Under these rules, software is considered IUS if it is developed for use in general administrative functions (such as payroll, bookkeeping, or personnel management) or in providing non-computer services (such as accounting or banking services). To qualify as research, IUS must meet the “High Threshold of Innovation” (HTI) test:

1. Innovative: The software must result in a substantial and economically significant reduction in cost or improvement in speed.
2. Significant Economic Risk: The taxpayer must commit substantial resources with technical risk that the resources will not be recovered in a reasonable time.
3. Not Commercially Available: The software cannot be purchased or leased off-the-shelf without modifications that meet the other two parts of the test.

The Comptroller also provided a list of 21 categories of software development unlikely to qualify, including modifying existing components to comply with new standards, re-hosting applications to new platforms, and designing graphic user interfaces. This regulatory crackdown led to litigation, as many taxpayers argued the Comptroller was exceeding its statutory authority. SB 2206’s move toward federal conformity is largely seen as a legislative solution to these administrative disputes.

Administrative Procedures and Registration

To claim the state R&D incentives, taxpayers must follow specific administrative steps. For the sales tax exemption (available until its 2026 repeal), a company must register with the Comptroller and obtain an “RD Number”. This registration process requires reporting total QREs, the number of full-time and part-time R&D employees in Texas, and total payroll expenses for those employees from the prior calendar year.

For the franchise tax credit, taxpayers must file specific schedules with their annual Franchise Tax Report:

• Long Form 05-158-A and 05-158-B.
• Credits Summary Schedule 05-160.
• Research and Development Activities Credits Schedule 05-178.

Statute of Limitations and Refund Claims

A critical administrative hurdle is the statute of limitations. A taxpayer must claim the credit on the report originally due for the period the expenses were incurred. Amending a franchise tax report for an out-of-statute period to create an R&D credit is generally barred. However, the Comptroller may verify QREs in a “closed” year for the purpose of verifying a credit carryforward that is being used in an “open” year.

Exclusions from Qualified Research

Certain activities are statutory exclusions and can never be considered qualified research, regardless of their complexity.

1. Funded Research: Any research funded by another person or governmental entity via grant or contract is excluded. Texas Rule 3.599 specifies that research is “funded” if the taxpayer does not retain substantial rights to the results or if payments are not contingent on the success of the research.
2. Research After Commercial Production: Activities occurring after a component is ready for commercial sale, such as “tooling up” for production, debugging minor flaws, or routine quality control, are excluded.
3. Adaptation and Duplication: Research related to adapting an existing component to a specific customer’s need or reverse-engineering a competitor’s product is disqualified.
4. Social Sciences and Humanities: Research in economics, business management, behavioral sciences, or arts is explicitly excluded from the “Technological in Nature” definition.
5. Foreign Research: Any research conducted outside the United States, Puerto Rico, or a U.S. possession is excluded. For the Texas credit, this is further restricted to research conducted only within the state of Texas.

Detailed Example: Application of Subchapter T to a Texas Energy Technology Firm

To illustrate the interplay of these complex rules, consider “Texas Heat-Capture LLC,” a firm specializing in developing systems to convert waste heat from industrial processes into electricity.

The Research Project: High-Efficiency Rankine Cycle Unit

In 2026, the company initiates a project to develop a new Organic Rankine Cycle (ORC) unit specifically for high-pressure drilling environments.

• Permitted Purpose: The goal is to improve the efficiency and reliability of a new business component (the ORC unit).
• Uncertainty: The firm is uncertain if a new proprietary working fluid can remain stable at the extreme temperatures encountered in West Texas drilling without degrading the turbine blades (Technical Uncertainty regarding Design and Capability).
• Process of Experimentation: The engineers design three different blade alloys and two variations of the fluid, conducting laboratory stress tests and thermal modeling (Systematic trial and error).
• Technological in Nature: The project relies on mechanical engineering and thermodynamic principles (Physical Sciences).

Identification of Texas QREs

The company incurs the following expenses in Texas during 2026:

1. Texas Wages: $500,000 for five engineers spent 90% of their time on this project. (Eligible wages = $500,000 because they pass the 80% “substantially all” threshold).
2. Texas Supplies: $100,000 for specialty alloys and testing fluids used in prototypes.
3. University Collaboration: $100,000 for a contract with Texas A&M University to provide thermal imaging and fluid analysis.

Total 2026 Texas QREs = $700,000.

Calculation of the Credit

The company had the following historical Texas QREs:

• 2023: $400,000
• 2024: $450,000
• 2025: $500,000
• Average = $450,000.
• Base Amount = 50% of Average = $225,000.

Under Subchapter T, the credit is calculated by separating university-linked expenses:

1. Standard QRE Pool: $600,000 ($500k wages + $100k supplies).
2. University QRE Pool: $100,000.

$Incremental Credit = ($700,000 – $225,000) = $475,000$

Pro-rating the base amount ($225,000) against the total, we apply the different rates:

• General Credit portion: ($600,000 – $192,857*) x 0.08722 = $35,511.52
• University Credit portion: ($100,000 – $32,143*) x 0.10903 = $7,398.54

(Note: Pro-ration is an illustrative simplification; actual schedules may vary based on Comptroller forms).

Total 2026 Texas Franchise Tax Credit = $42,910.06.

Credit Utilization

If Texas Heat-Capture LLC has a franchise tax liability of $10,000, their credit claim is limited to 50% of that liability ($5,000). They would pay $5,000 in tax and carry forward the remaining $37,910.06 for up to 20 years.

However, if the company is a new startup and qualifies as a “No Tax Due” entity (e.g., they fall under the small business threshold), they can receive the full $42,910.06 as a cash refund from the State of Texas under the new SB 2206 provisions.

Strategic Planning and Documentation Requirements

To survive a Comptroller audit, Texas businesses must maintain contemporaneous documentation. reconstructed documentation is frequently rejected by state auditors.

Documentation Checklist for Texas R&D

• Project Lists: Detailed descriptions of each R&D project, clearly identifying the technical uncertainty and the process of experimentation.
• Time Tracking: Records linking specific employee hours to qualified projects.
• General Ledger Detail: Invoices and receipts for R&D supplies and contract payments, ensuring they are tied to specific projects.
• Technical Evidence: Laboratory notes, test results, prototype photos, white papers, and design revisions.
• Federal Alignment: Copies of the filed Form 6765 and any IRS audit closing letters, as federal adjustments now automatically trigger Texas adjustments under Subchapter T.

Transition Considerations for 2025-2026

• Sales Tax Exemption vs. Credit: 2025 is the final year businesses can elect the sales tax exemption for R&D equipment. If significant capital expenditure is planned, businesses should evaluate whether the upfront sales tax savings in 2025 outweigh the future franchise tax credit.
• Statistical Sampling: Large taxpayers should consider the newly authorized statistical sampling procedures to reduce the burden of documenting hundreds of small projects.
• Bonus Depreciation: Businesses should be aware of Acting Comptroller Kelly Hancock’s 2025 announcement that Texas will align its franchise tax depreciation rules with federal bonus depreciation starting with the 2026 report, which may impact how R&D equipment is accounted for in the broader franchise tax calculation.

Final Thoughts: The Permanent Era of Texas Innovation

The transformation of the Texas R&D tax credit from the elective, fixed-date Subchapter M to the permanent, rolling-conformity Subchapter T represents a major milestone in Texas tax policy. By adopting the federal IRC Section 41(d) definition as it evolves, and by increasing credit rates while introducing refundability, the state has addressed long-standing administrative complaints from the tech and energy sectors.

For professional tax preparers and corporate planners, the focus must shift from reconciling two different legal standards (2011 vs. Current IRC) to ensuring that the primary federal R&D claim is robust and well-documented. The elimination of the sales tax exemption indicates a strategic preference for performance-based incentives that reward actual increases in research spending. As Texas continues to outpace the nation in economic growth, the refined R&D credit serves as a foundational pillar for maintaining the state’s competitive edge in the global knowledge economy.