Research and Development Activities Credits Schedule (Form 05-178)

Form 05-178 is the mandatory administrative schedule used by Texas taxpayers to calculate and claim the franchise tax credit for qualified research and development expenditures conducted within the state. It serves as the primary evidentiary document for reconciling internal innovation costs with the statutory requirements of the Texas Tax Code and federal Internal Revenue Code benchmarks.

The Research and Development (R&D) Activities Credits Schedule is more than a mere calculation worksheet; it represents the operationalization of a multi-billion dollar economic policy designed to incentivize high-technology investment and the creation of high-paying jobs in Texas. Since its implementation on January 1, 2014, the credit has functioned under the legal framework of Texas Tax Code Chapter 171, Subchapter M, which requires a rigorous alignment between state-level expenditures and the technical definitions found in Section 41 of the Internal Revenue Code (IRC). For a taxable entity to successfully claim the credit, it must navigate a complex ecosystem of "frozen" federal conformity, stringent state-specific location requirements, and an elective choice between the franchise tax credit and a sales tax exemption. The following report provides an exhaustive analysis of the regulatory guidance, legal standards, and mechanical procedures required to master the Form 05-178 and the broader Texas R&D tax credit regime, including the significant overhaul recently enacted by the Texas Legislature.

Statutory Foundations and the Subchapter M Framework

The Texas R&D tax credit was born out of a desire to keep the state economically competitive with the dozens of other states—approximately 29 at the time of the latest legislative review—that offer similar incentives for innovation. House Bill 800 (83rd Legislature) established the modern credit to provide businesses with a choice: they could either receive a sales and use tax exemption on depreciable tangible personal property used directly in qualified research, or they could claim a credit against their franchise tax liability based on qualified research expenses.

The Role of Internal Revenue Code Conformity

One of the most critical aspects of the Texas R&D credit is its relationship with federal law. Under Subchapter M, Texas law incorporates by reference the definitions of "qualified research" and "qualified research expense" as they appeared in Section 41 of the Internal Revenue Code in effect on December 31, 2011. This "frozen" conformity means that subsequent changes to the federal tax code or Treasury Regulations do not automatically apply to the Texas credit unless the Texas Comptroller specifically adopts them or the Texas Legislature amends the state statute.

This legal structure creates a compliance challenge for taxpayers who must maintain two sets of R&D studies: one for current federal filings and one for Texas, which must adhere to the 2011 standards. The Comptroller has, however, issued guidance in 2022 and 2023 to bridge some of these gaps, particularly regarding the treatment of Internal Use Software (IUS) and the application of Treasury Regulation § 1.41-4.

Eligibility Criteria and the Taxable Entity

To claim the credit on Form 05-178, an entity must be subject to the Texas franchise tax. This includes corporations, limited liability companies (LLCs), partnerships, and professional associations. Importantly, the credit is claimed at the taxable entity level or, in the case of a combined group, at the group level. In a combined report, the group is treated as a single taxpayer, meaning that research expenses incurred by various members of the group are aggregated, but they must all meet the requirement of being conducted in Texas.

Eligibility Component	Requirement	Statutory Reference
Entity Type	Corporations, LLCs, Partnerships, etc.	Tax Code § 171.652
Location	Must be conducted in Texas	Tax Code § 171.651
Activity	Must meet the Four-Part Test	IRC § 41(d) (2011)
Filing Status	Must file Long Form Franchise Report	Rule 3.599

The Mechanics of Form 05-178: A Functional Analysis

Form 05-178 is divided into specific sections that guide the taxpayer through the incremental credit calculation. The schedule is designed to reward businesses that increase their research spending relative to a historical baseline.

Qualified Research Expenses in Texas (QRET)

The starting point for the schedule is the identification of Qualified Research Expenses in Texas (QRET). These expenses are the sum of in-house research expenses and contract research expenses incurred for research conducted in the state.

• Wages: These are salaries and cash compensation paid to employees for "qualified services". The Comptroller defines qualified services to include the actual conduct of research, the direct supervision of research, and the direct support of research. Direct support includes activities like cleaning laboratory equipment or compiling research data, but it excludes general and administrative functions like payroll, human resources, or accounting.
• Supplies: These include tangible property, other than land or improvements to land, that is consumed in the research process. Recent guidance from the Comptroller’s Tax Policy Division (March 24, 2025) has clarified that property subject to depreciation under IRC Section 167 or 168—such as permanent laboratory equipment or heavy machinery—cannot be treated as a "supply" for the franchise tax credit. This distinction is vital because such depreciable property is instead eligible for the sales tax exemption, provided the taxpayer has not elected to claim the franchise tax credit for that period.
• Computer Leasing/Rental: Payments for the use of computers in the conduct of qualified research, such as cloud computing costs or server rentals, are includable.
• Contract Research Expenses: These are payments to third parties for research performed on the taxpayer's behalf. Generally, only 65% of these payments are considered "qualified," though this increases to 75% for payments to qualified research consortia.

The Incremental Calculation Logic

Form 05-178 utilizes an incremental method to determine the credit amount. This means the credit is not applied to the total amount of R&D spending, but rather to the amount by which current spending exceeds a "base amount".

For entities that have three preceding tax periods of QRET, the calculation follows these steps:

• Step 1: Average the QRET from the three preceding tax years.
• Step 2: Multiply that average by 50% to establish the "Base Amount".
• Step 3: Subtract the Base Amount from the current period's QRET. If the result is less than zero, the incremental credit is zero.
• Step 4: Multiply the difference by the applicable rate—5% for standard research or 6.25% if the research was conducted under a contract with an institution of higher education.

For new entities or those without a three-year history of QRET in Texas, a simplified method applies. If an entity has no QRET in one or more of the three preceding tax periods, the credit is simply 2.5% of the total current-period QRET (or 3.125% for higher education contracts).

Mathematical Formulas for Form 05-178

The calculations on the form can be expressed through the following formulas:

For established entities (Items 2-9):

Credit = 0.05 × ( QRET_current - ( 0.50 × (QRET_n-1 + QRET_n-2 + QRET_n-3) / 3 ) )

For entities without a 3-year history (Items 10-11):

Credit = 0.025 × QRET_current

Regulatory Guidance: Defining "Qualified Research"

The Texas Comptroller provides extensive guidance, primarily through Texas Administrative Code Rule 3.599 and various STAR (State Automated Tax Research) documents, on what constitutes "qualified research."

The Four-Part Test

To satisfy the requirements for reporting on Form 05-178, an activity must pass the rigorous "Four-Part Test" derived from IRC Section 41(d):

• The Section 174 Test: The expenditures must be eligible for treatment as expenses under Section 174, meaning they must be incurred in connection with the taxpayer's trade or business and represent research and development costs in the experimental or laboratory sense. This test is intended to exclude costs associated with the ordinary testing or inspection of materials or products for quality control, efficiency surveys, or management studies.
• The Technological in Nature Test: The research must fundamentally rely on principles of the physical or biological sciences, engineering, or computer science. It does not include research in the social sciences, arts, or humanities.
• The Business Component Test: The research must be undertaken for the purpose of discovering information intended to be used in the development of a new or improved "business component". A business component is defined as any product, process, computer software, technique, formula, or invention held for sale, lease, license, or use in the taxpayer's trade or business.
• The Process of Experimentation Test: Substantially all of the research activities must constitute a process of experimentation relating to a new or improved function, performance, reliability, or quality. This involves a systematic process to evaluate one or more alternatives to achieve a result where the capability or the method of achieving that result, or the appropriate design of that result, is uncertain at the outset.

Excluded Activities

The Comptroller is explicit about activities that do not qualify for the credit, and therefore should not be included in the QRET reported on Form 05-178:

• Post-Commercial Production Research: Any research conducted after the beginning of commercial production of the business component.
• Adaptation and Duplication: Activities involving the adaptation of an existing product or process to a customer's specific needs, or the duplication of an existing product or process.
• Surveys and Studies: Efficiency surveys, management studies, consumer surveys, or advertising and promotions.
• External Research: Research conducted outside the United States, Puerto Rico, or a U.S. possession.
• Funded Research: Any research to the extent it is funded by another person or governmental entity, such as through a grant or contract where the researcher does not retain substantial rights to the results.

Advanced Regulatory Issues: Internal Use Software (IUS)

Internal Use Software has historically been one of the most contested areas of the Texas R&D tax credit. The Comptroller’s guidance has evolved significantly to address how software development for a taxpayer's internal administrative functions can qualify for the credit.

The IUS Guidance of 2023

On February 6, 2023, the Director of the Tax Policy Division issued a memorandum (STAR 202302001L) summarizing the federal IUS regulations that the Comptroller recognizes as incorporated into Texas law. This memo followed a period of regulatory confusion where rules were significantly revised in 2021 and then reversed in 2022.

Under current guidance, taxpayers may elect between two different versions of federal Treasury Regulations (§ 1.41-4(c)(6)): the version in Internal Revenue Bulletin (IRB) 2001-5 or IRB 2002-4. The elected version must be applied in its entirety.

The High Threshold of Innovation Test for IUS

For software that is considered "internal use"—meaning it is developed for general and administrative functions like payroll, human resources, or non-computer services like banking or accounting—the activity must meet a "High Threshold of Innovation" to be includable on Form 05-178. This test requires:

• Significant Economic Risk: The taxpayer must commit substantial resources to the development and there must be substantial uncertainty, due to technical risk, that the resources will not be recovered in a reasonable time.
• Innovation: The software must be intended to result in a reduction in cost or improvement in speed that is substantial and economically significant.
• Commercial Availability: The software cannot be purchased, leased, or licensed and used for the intended purpose without modifications that would satisfy the other parts of the test.

Notably, the Comptroller’s current position is that the 2016 federal regulations regarding IUS—which are generally more taxpayer-friendly regarding "dual function" software and interaction with third parties—are not incorporated into Texas law for the Subchapter M credit.

Compliance and Administration: Statute of Limitations and Documentation

To secure the credit on Form 05-178, taxpayers must adhere to strict administrative timelines and maintain high standards of documentation.

The Statute of Limitations for Refunds

A critical piece of guidance from STAR 202301007M clarifies that the statute of limitations for filing refund claims applies to the creation of the R&D credit. Taxpayers cannot amend a franchise tax report for a period that is closed by the statute of limitations to "create" a new R&D credit or the associated carryforward. If the year in which the R&D expenditures were made is closed, the credit is barred. However, Rule 3.599(g)(5) allows the Comptroller to verify QREs in a closed year specifically for the purpose of verifying the carryforward available in open periods.

Audit Standards and the Burden of Proof

Taxpayers must establish their entitlement to the credit by "clear and convincing evidence". The Comptroller’s auditors are instructed to look for "contemporaneous business records" created during the period the research was conducted.

Type of Record	Examples
Personnel Data	Payroll records, Labor timesheets, Innovation logs
Project Data	Testing protocols, Trial run results, Prototypes, Records of bug fixes
Financial Data	Tax invoices, Receipts, Purchase orders, Research contracts
Technical Data	Photographs/videos of testing, Records of analysis

The Comptroller has also approved the use of statistical sampling procedures, as permitted by IRS Revenue Procedure 2011-42, to determine QREs in large-scale claims. Furthermore, if the IRS or the Comptroller accepts a taxpayer's adjusted ASC 730 financial statement R&D costs for federal purposes, the Texas portion of those costs is generally sufficient evidence for the state credit.

The Major Shift: Senate Bill 2206 and Subchapter T

The Texas R&D tax credit is currently in a state of transition. Senate Bill (SB) 2206, signed into law in June 2025, overhauls the credit regime and effectively retires the Subchapter M version (and Form 05-178) for reports originally due on or after January 1, 2026.

Enhancing the Credit and Repealing the Exemption

SB 2206 seeks to make the credit more permanent and more valuable while simplifying the administrative burden. Key changes include:

• Rate Increases: The standard incremental credit rate increases from 5% to 8.722%. The rate for research with higher education institutions increases from 6.25% to 10.903%.
• Repeal of Sales Tax Exemption: Effective January 1, 2026, the sales and use tax exemption for R&D property (Tax Code § 151.3182) is repealed. All future R&D incentives will be consolidated into the franchise tax credit.
• Rolling Conformity: The definition of "qualified research expense" will now be tied directly to Line 48 of IRS Form 6765 for the year in question. This moves Texas away from the "frozen" 2011 IRC and aligns it dynamically with current federal law.
• Refundability: A major change for startups and small businesses is that the credit is now refundable for entities that owe no franchise tax (such as those below the no-tax-due threshold or new veteran-owned businesses).

The Transition to Form 05-182

As Subchapter M is replaced by Subchapter T, Form 05-178 will be replaced by Form 05-182 (Texas Franchise Tax Subchapter T Research and Development Activities Credit Schedule) for the 2026 report year and beyond. However, unused credits established under the old Subchapter M regime can still be carried forward for up to 20 years and applied to future reports.

Credit Era	Rate (Standard)	Rate (University)	Expiration	Form Used
Subchapter M	5.0%	6.25%	Dec. 31, 2026 (for establishment)	05-178
Subchapter T	8.722%	10.903%	Permanent	05-182

Detailed Example: Calculating the Credit on Form 05-178

To demonstrate the application of the guidance and the law, consider "TechNovation LLC," a Texas-based software development company.

Scenario Background

TechNovation is an established entity with several years of research activity in Austin, Texas. For the 2024 report year (covering the 2023 calendar year), the company incurred the following qualified research expenses:

• Wages: $800,000 paid to developers engaged in a new encryption algorithm project (meeting the Four-Part Test).
• Supplies: $50,000 for specialized prototype hardware materials (not depreciable).
• Contract Research: $100,000 paid to an outside testing lab.
• Previous QRET:
  • 2021: $600,000
  • 2022: $700,000
  • 2023: $800,000

Step-by-Step Calculation for TechNovation LLC

1. Calculate Current Period QRET (Item 1a):

QRET_current = Wage + Supply + (0.65 × Contract)

QRET_current = $800,000 + $50,000 + ($100,000 × 0.65) = $915,000

2. Calculate Average QRET for Preceding Periods (Item 5):

Average = ($600,000 + $700,000 + $800,000) / 3 = $700,000

3. Calculate Average QRET x 50% (Item 6):

Base Amount = $700,000 × 0.50 = $350,000

4. Calculate the Difference (Item 7):

Difference = $915,000 - $350,000 = $565,000

5. Calculate the Credit (Item 8 - No Higher Ed Contracts):

Credit = $565,000 × 0.05 = $28,250

TechNovation LLC will enter $28,250 as its R&D activities credit. If the company's total franchise tax due was $100,000, it could apply the full $28,250 credit because it is less than the 50% liability cap ($50,000).

Implications of the Carryforward

If TechNovation had $60,000 in credits (perhaps from a larger project) but only $100,000 in tax liability, the 50% cap would limit the usable credit to $50,000. The remaining $10,000 would be carried forward. Under Texas law, these unused R&D credits can be carried forward for up to 20 consecutive report years.

Final Thoughts

The Research and Development Activities Credits Schedule (Form 05-178) is the operational heart of the Texas R&D tax credit. Its design, based on an incremental simplified method, reflects a policy goal of rewarding businesses that continually invest and expand their technological capabilities within the state.

The transition from Subchapter M to Subchapter T marks a significant maturation of the program. By eliminating the choice between the sales tax exemption and the credit, the state is simplifying the decision-making process for taxpayers and consolidating its support for innovation through the franchise tax system. The move toward rolling conformity with Line 48 of federal Form 6765 is perhaps the most significant change, as it dramatically reduces the "compliance gap" between federal and state filings.

For businesses currently utilizing Form 05-178, the immediate priority is to maintain robust, contemporaneous documentation that satisfies the "clear and convincing" evidentiary standard. As the state moves toward a more generous and permanent credit structure in 2026, the data reported on today's Form 05-178 will serve as the historical baseline for the next generation of Texas research incentives. The Comptroller's continued issuance of STAR documents and rule updates remains the primary source for navigating the nuances of IUS, contract research, and the precise boundaries of what constitutes "qualified services" in the Texas innovation economy.