Supplies Used in the Conduct of Qualified Research

Supplies used in the conduct of qualified research refer to non-depreciable tangible personal property, excluding land and improvements, that is consumed or used directly in experimentation to develop or improve a business component. These costs constitute a primary category of in-house research expenses for entities seeking to claim the Texas research and development tax credit against their franchise tax liability.

The definition and application of supplies within the Texas Research and Development (R&D) tax credit framework necessitate a rigorous examination of both state statutes and federal tax principles incorporated by reference. Under the Texas Tax Code, the eligibility for the research credit is fundamentally tethered to the definitions provided in Section 41 of the Internal Revenue Code (IRC). This alignment ensures that expenditures qualifying for the federal credit generally qualify for the state credit, provided the research activities are conducted within the boundaries of Texas. However, the interpretation of what constitutes a supply is often a point of contention during audits, as the distinction between a consumable supply and a capital asset subject to depreciation can significantly alter the tax benefit realized by a taxable entity. Understanding the nuances of these definitions requires a deep dive into the historical development of the Texas credit, the specific administrative rules promulgated by the Texas Comptroller of Public Accounts, and the upcoming legislative overhaul that will transform the credit landscape in 2026.

Statutory Foundations of the Texas Research and Development Tax Credit

The current Texas R&D tax credit is governed by Chapter 171, Subchapter M of the Texas Tax Code. Enacted to bolster the state’s competitive standing in the global innovation economy, Subchapter M allows taxable entities to claim a credit against the Texas franchise tax or, alternatively, a sales and use tax exemption for certain research-related purchases. The legal architecture of this credit is built upon a fixed-date conformity model for reports due before January 1, 2026. During this period, Texas law explicitly incorporates the definitions of qualified research and qualified research expense as they appeared in Section 41 of the Internal Revenue Code on December 31, 2011.

This specific date is critical because it isolates the Texas credit from subsequent federal legislative changes or Treasury regulations, unless the state specifically adopts those updates through administrative rule-making. For the practitioner, this means that while federal guidance is persuasive, the primary authority remains the 2011 version of the IRC and the corresponding Texas Administrative Code (TAC) Section 3.599. The significance of this distinction cannot be overstated; it creates a localized legal environment where certain federal clarifications—such as those regarding internal-use software or pilot models issued after 2011—may not apply directly to Texas claims unless they align with the 2011 standard.

Statutory Component	Primary Legal Authority	Role in R&D Framework
Texas Tax Code	Chapter 171, Subchapter M	Establishes the existence and eligibility for the state credit.
Federal Reference	IRC Section 41 (as of 12/31/2011)	Provides the core definition of Qualified Research Expenses.
Administrative Rule	34 TAC § 3.599	Provides Comptroller’s guidance on calculation and application.
Successor Law	Chapter 171, Subchapter T	Effective 1/1/2026; implements rolling federal conformity.

Detailed Analysis of Supplies in the Research Context

The term supplies is one of three categories of in-house research expenses defined under IRC Section 41(b)(2)(A), alongside employee wages for qualified services and amounts paid for the right to use computers in the conduct of research. In the context of qualified research, a supply must meet two negative criteria and one positive criterion to be eligible for inclusion in the credit calculation. Statutorily, the term supplies means any tangible property other than land or improvements to land and property of a character subject to the allowance for depreciation.

The Exclusion of Land and Improvements

The exclusion of land and land improvements is absolute and serves to prevent the state from subsidizing real estate acquisition through an incentive intended for operational innovation. This exclusion extends to any fixtures or structural components that become part of the real property. While a research facility itself cannot be a supply, the materials consumed within that facility for experimentation may qualify.

The Depreciability Threshold

The most complex aspect of the supplies definition is the exclusion of property of a character subject to the allowance for depreciation. This creates a rigid boundary between consumable research materials and capital equipment. To determine if an item is of a character subject to depreciation, one must look to IRC Section 167. If property has a useful life of more than one year and is subject to wear and tear, exhaustion, or obsolescence, it is generally considered depreciable.

A critical area of recent controversy involves the interaction between IRC Section 174 and IRC Section 41. Section 174 allows for the immediate expensing of research and experimental expenditures, including costs for property that might otherwise be depreciable. However, the Texas Comptroller has issued policy guidance clarifying that an expense being deductible under Section 174 does not automatically transform that item into a supply for the purposes of the Section 41-based credit. The Comptroller’s position is that the character of the property (whether it is the type of property that is normally depreciable) is what determines its exclusion from the definition of supplies, regardless of how the taxpayer chooses to treat it for income tax purposes.

Positive Definition: Use in the Conduct of Qualified Research

Beyond the exclusions, the positive requirement is that the supply must be used in the conduct of qualified research. This implies a direct nexus between the consumption of the material and the experimentation process. In the Comptroller’s view, as expressed in Rule 3.599, direct use is a standard of immediate effect. Items that provide only an indirect benefit, such as general office supplies used by administrative staff supporting the research department, are systematically excluded.

Eligible Supply Examples	Ineligible (Non-Supply) Examples
Raw materials for prototypes/pilot models	Capital equipment (machinery/tooling)
Laboratory chemicals and reagents	Land and permanent buildings
3D printing filaments and resins	General office stationery and supplies
Electronic components used in testing circuits	Utilities (unless extraordinary and direct)
Consumable specialized gasses	Subscriptions and licensing fees
Scrapped materials from experimental runs	Property subject to depreciation (even if expensed)

Local State Revenue Office Guidance and the STAR System

The Texas Comptroller of Public Accounts administers the state’s tax laws and provides detailed interpretations through the State Tax Automated Research (STAR) system. This system contains redacted letter rulings, administrative hearings, and policy memos that serve as the primary source of guidance for taxpayers.

Rule 3.599 and Administrative Interpretation

Rule 3.599 (Margin: Research and Development Activities Credit) provides the regulatory framework for applying Chapter 171, Subchapter M. A key insight from this rule is the definition of qualified services, which includes employees engaging in the actual conduct of research or providing direct support. The consumption of supplies is often tied to these direct support activities. For instance, a laboratory worker cleaning equipment used in qualified research or a machinist machining a prototype part are both providing direct support, and the materials they consume in those tasks (e.g., cleaning solvents, raw metal stock) are eligible supplies.

Private Letter Ruling Analysis: The Related Entity Issue

A significant 2023 ruling (Private Letter Ruling No. 202302017L) highlights the Comptroller’s strict stance on the person performing the research. In this case, a taxpayer purchased items that were used by its parent company for research. The Comptroller ruled that the taxpayer could not claim the R&D sales tax exemption because the taxpayer itself was not the entity engaged in qualified research. This interpretation is critical for franchise tax credit purposes as well; the entity that incurs the expense and claims the credit must be the entity that actually uses the supplies in its own qualified research activities.

Internal Use Software (IUS) Rulings

The treatment of supplies in the context of software development is particularly nuanced. While software itself is often intangible, the hardware components or specialized servers used exclusively for testing may be considered supplies if they are non-depreciable. The Comptroller has issued guidance summarizing the federal statutes and regulations relating to internal use software that have been incorporated by reference. Historically, Texas has applied a more restrictive standard to IUS than the current federal innovation test, relying instead on the 2011 standard which requires that the software be developed for use in an activity that itself constitutes qualified research.

Application of the Four-Part Test to Supplies

To determine if the use of a supply relates to qualified research, the underlying activity must satisfy the federal four-part test established by IRC Section 41(d). The consumption of supplies must be part of an activity that meets these criteria:

1. Section 174 Test: The expenditure must be eligible for treatment as a research and experimental expense under IRC Section 174, meaning it must be incurred in connection with the taxpayer’s trade or business and represent a research cost in the experimental or laboratory sense.
2. Technological in Nature Test: The research must fundamentally rely on principles of physical science, biological science, engineering, or computer science.
3. Elimination of Uncertainty Test: The activity must be intended to discover information to eliminate uncertainty concerning the capability, method, or design for developing or improving a business component.
4. Process of Experimentation Test: Substantially all of the activities must involve a process of experimentation, such as evaluating alternatives, testing hypotheses, or systematic trial and error.

For supply costs to qualify, they must be essential to and directly used in an activity that passes all four parts of this test. If a company buys $100,000 of aluminum to build a new wing design, but the uncertainty regarding the wing’s design was already resolved in a previous phase, the aluminum used for a final production-ready prototype may not qualify as a supply because the elimination of uncertainty and process of experimentation requirements are no longer met.

Legislative Reform: Transition to Subchapter T (2026)

The Texas R&D tax credit landscape is currently in a state of transition. Following the 89th Legislature’s passage of Senate Bill 2206, the existing Subchapter M will be repealed and replaced by Subchapter T, effective January 1, 2026. This legislation represents a complete overhaul of the credit’s administration, calculation, and eligibility.

Shift to Rolling Federal Conformity

One of the most significant changes under Subchapter T is the move from the fixed-date 2011 IRC conformity to rolling conformity. Starting in 2026, the definition of qualified research expenses will be directly tied to the amount reported on Line 48 of the taxpayer’s federal IRS Form 6765 for the current tax year. This change is intended to streamline compliance, as it allows Texas to automatically follow federal audit outcomes and legislative updates regarding what constitutes a QRE.

Repeal of the Sales Tax Exemption

A major strategic shift in SB 2206 is the repeal of Texas Tax Code Section 151.3182, which provided the sales and use tax exemption for depreciable R&D property. Previously, taxpayers had to choose between a franchise tax credit on QREs (wages, supplies, and contract research) or a sales tax exemption on depreciable equipment. By 2026, this choice is eliminated. All R&D incentives will be consolidated into an enhanced franchise tax credit.

Enhanced Credit Rates and Refundability

To compensate for the loss of the sales tax exemption, the legislature has significantly increased the franchise tax credit rates.

Credit Tier	Current Rate (Subchapter M)	New Rate (Subchapter T – 2026)
Standard Rate	5.0% of QREs over base	8.722% of QREs over base
University Collaboration	6.25% of QREs over base	10.903% of QREs over base
New Entity (No 3-yr history)	2.5% of current QREs	4.361% of current QREs
New Entity (w/ University)	3.125% of current QREs	5.451% of current QREs

Furthermore, Subchapter T introduces refundability for certain entities. Under current law, the credit is non-refundable and limited to 50% of the franchise tax due, with unused amounts carried forward for up to 20 years. In 2026, entities that are not required to pay franchise tax (such as those below the no tax due threshold or new veteran-owned businesses) can claim the credit as a cash refund. This is a transformative change for Texas startups, which often incur significant supply costs during their pre-revenue phase.

Industry-Specific Applications of the Supplies Definition

The practical application of the supplies definition varies significantly across different sectors of the Texas economy.

Aerospace and Defense

In the aerospace industry, the development of a pilot model or prototype is a central research activity. The supplies involved include high-cost materials like aerospace-grade titanium, carbon fiber composites, and specialized sensors. These items are typically consumed during destructive testing or flight simulations. Because these materials are used to resolve technical uncertainties regarding aerodynamics, structural integrity, or fuel efficiency, they are classic examples of qualified supplies. However, the massive autoclaves or CNC machines used to fabricate these prototypes are depreciable and thus excluded from the supplies category.

Biotechnology and Life Sciences

For Texas-based biotech and pharmaceutical firms, supplies often constitute a larger portion of the R&D budget than in other industries. This includes chemical reagents, biological cultures, disposable laboratory equipment (such as pipettes and test tubes), and clinical trial materials. As long as these items are used in the experimental or laboratory sense to test the efficacy or safety of a new drug or medical device, they qualify. A key insight for this sector is that reagents and materials used in failed experiments are still qualifying supplies; the tax credit is intended to reward the process of research, regardless of the commercial success of the outcome.

Energy and Clean Technology

Texas energy companies developing new carbon capture systems or improved battery storage technologies consume vast amounts of specialized fluids and chemical catalysts. These catalysts, while they may last for several cycles, are often non-depreciable and are eventually exhausted during the research process. The Comptroller’s guidance in STAR memo 202402020L, while primarily focused on sales tax, reinforces the idea that materials essential to the operation of experimental systems can be viewed as qualifying supplies if they meet the non-depreciability test.

Audit Defense and Documentation Requirements

The Texas Comptroller’s Audit Division applies a high level of scrutiny to R&D credit claims, particularly regarding the substantiation of supplies. Unlike federal audits where a nexus may sometimes be inferred, Texas auditors demand contemporaneous records that tie specific expenditures to specific research projects.

The Burden of Proof

Taxpayers must establish their eligibility for the credit with clear and convincing evidence. In the context of supplies, this means documentation must go beyond mere general ledger entries. Auditors will look for:

• Invoices and Purchase Orders: These must identify the specific items purchased.
• Project Lists and Research Logs: These should provide a narrative of the research project, the technical uncertainties involved, and how the purchased supplies were consumed in the experimentation process.
• Testing Protocols and Results: Evidence that a process of experimentation actually took place, such as lab reports, test data, or photographs of prototypes.
• Inventory Records: For companies with high volumes of supplies, tracking systems that show the issuance of materials from a central stores area to a specific R&D project are highly valuable.

Statistical Sampling

Both current audit practice and the upcoming Subchapter T rules permit the use of statistical sampling to determine the amount of QREs. This is a critical tool for large taxpayers who may have thousands of small-ticket supply purchases. By following IRS Revenue Procedure 2011-42, a taxpayer can audit a representative sample of supply invoices and project the results across the entire population, significantly reducing the administrative burden of an audit.

Comprehensive Example: The “NexGen Biotech” Scenario

To illustrate the interplay between state guidance, federal law, and the supplies definition, consider the following example of NexGen Biotech, a hypothetical firm operating in Houston.

Phase 1: Experimental Design and Supply Acquisition

In 2024, NexGen Biotech begins research on a new synthetic reagent to improve the shelf-life of vaccines. During the year, they incur the following costs:

1. Chemical Reagents: $200,000 for various chemical compounds consumed in the lab.
2. Lab Glassware: $20,000 for specialized pipettes and flasks used in testing.
3. Experimental Vaccine Batches: $150,000 in raw materials to create small-scale batches for stability testing.
4. Automated Reagent Mixer: $300,000 for a machine that automates the mixing process (useful life of 5 years).
5. Utilities: $15,000 in monthly electricity bills for the research facility.

Analysis of Eligible Supplies

• Chemical Reagents ($200,000): These are non-depreciable tangible property consumed directly in experimentation. They qualify as supplies.
• Lab Glassware ($20,000): If these items are considered consumable and non-depreciable under the taxpayer’s accounting policies, they qualify as supplies.
• Experimental Vaccine Batches ($150,000): These materials are used to create a pilot model for testing. Even if the vaccines are later destroyed or theoretically could have been sold, the materials consumed in their creation for uncertainty resolution qualify as supplies.
• Automated Reagent Mixer ($300,000): This is depreciable tangible property (useful life > 1 year). It is not a supply for the franchise tax credit. However, NexGen can use its RD registration number to claim a sales tax exemption on this purchase under Section 151.3182.
• Utilities ($15,000): Generally, standard utility bills are excluded as they are considered general overhead or administrative expenses. Only extraordinary utility costs directly attributable to the research process might be considered.

Calculating the Credit (Subchapter M – 2024)

NexGen has a 3-year average of Texas QREs of $500,000. Their 2024 QREs (excluding the mixer and utilities) total $370,000 in supplies plus $600,000 in wages for a total of $970,000.

• Base Amount: 50% of $500,000 = $250,000.
• Excess QREs: $970,000 – $250,000 = $720,000.
• Calculated Credit: 5% of $720,000 = $36,000.

NexGen will report this $36,000 on its 2025 Franchise Tax Report using Schedules 05-160 and 05-178.

Transition to 2026 (Subchapter T)

If the same research continues into 2026:

• The $300,000 mixer purchase would now be subject to Texas sales tax, as the exemption is repealed.
• The credit rate for the excess QREs would rise to 8.722%.
• If NexGen is still pre-revenue and owes no franchise tax, the entire credit amount could be received as a cash refund.

Second-Order Insights: Strategic Implications for Taxpayers

The interplay between the supplies definition and the evolving Texas law creates several strategic imperatives for businesses.

The Acceleration of Capital Purchases

Because the sales tax exemption for depreciable property expires on December 31, 2025, capital-intensive R&D firms have a limited window to acquire expensive machinery tax-free. While the enhanced franchise credit under Subchapter T provides a higher rate on operational expenses (wages and supplies), it does not provide an equivalent benefit for the cost of capital equipment. Therefore, taxpayers should consider accelerating the purchase of depreciable research property into 2025 while the Section 151.3182 exemption remains active.

Integration of Supply Tracking into ERP Systems

With the move to rolling conformity and Line 48 of Form 6765 in 2026, the synchronization of federal and state reporting becomes paramount. Taxpayers should adjust their Enterprise Resource Planning (ERP) or accounting systems to isolate research-related supply purchases at the point of procurement. By tagging these expenses by project and location (Texas-only), companies can generate the contemporaneous documentation necessary to survive both an IRS and a Texas Comptroller audit.

university Collaboration as a Supply Multiplier

The enhanced credit rate for university-based research (rising from 6.25% to 10.903% in 2026) applies to all QREs incurred under the contract, which implicitly includes the supplies used by the university on the taxpayer’s behalf. For companies with high supply costs but limited lab infrastructure, contracting with a Texas university can be a highly effective way to amplify the tax benefit of those expenditures.

Final Thoughts

The meaning of supplies used in the conduct of qualified research in Texas is a reflection of the state’s broader economic strategy to incentivize tangible, operational research activities. While the core definition remains rooted in the federal distinction between consumable materials and depreciable capital, the application of this definition is heavily mediated by the Texas Comptroller’s administrative rules and the impending transition to Subchapter T.

For the taxable entity, success in claiming the R&D credit depends on a granular understanding of the depreciability boundary and a commitment to meticulous documentation. The materials consumed in experimentation—whether they be exotic alloys in an aerospace hangar or chemical reagents in a medical lab—are the lifeblood of the research process. As Texas moves toward a more streamlined, federally-aligned, and potentially refundable credit system in 2026, the ability to accurately identify, capture, and defend these supply costs will remain a critical lever for maximizing the return on investment in Lone Star State innovation. By navigating the complexities of the STAR system guidance and the legislative shifts of the 89th Legislature, Texas businesses can ensure that their most innovative endeavors are supported by the robust tax incentives they deserve.