Process of Experimentation Test

The Process of Experimentation Test is a systematic evaluative procedure designed to resolve technical uncertainties through the identification of alternatives and the use of scientific methods to refine a business component’s design or function. In the context of the Ohio Research and Development Investment Tax Credit, this test serves as a mandatory threshold for distinguishing qualified innovation from routine engineering, requiring that at least eighty percent of research activities constitute an iterative, technological evaluation of alternatives.

The landscape of corporate taxation in Ohio underwent a fundamental transformation with the transition from a traditional corporate franchise tax to the Commercial Activity Tax (CAT) in the mid-2000s. Central to this transition was the preservation of incentives aimed at fostering a high-tech, innovation-driven economy within the state’s borders. The Ohio Research and Development Investment Tax Credit, authorized under Section 5751.51 of the Ohio Revised Code, was designed to mirror the federal research credit while maintaining distinct jurisdictional requirements. To navigate this credit successfully, professional practitioners and corporate taxpayers must move beyond a superficial understanding of “research” and engage with the rigorous, four-part statutory test mandated by Internal Revenue Code (IRC) Section 41, which Ohio law adopts by reference.

The Statutory Integration of Federal and State Standards

The Ohio Revised Code explicitly provides that “qualified research expenses” shall have the same meaning as defined in Section 41 of the Internal Revenue Code. This creates a framework of rolling conformity where the definitions of what constitutes a qualified research activity (QRA) are tethered to federal law, yet the administration and enforcement of these credits are subject to the specific oversight of the Ohio Department of Taxation (ODT). Under R.C. 5751.51, the credit is nonrefundable and is calculated as 7% of the qualified research expenses incurred in Ohio that exceed the taxpayer’s average annual QREs for the three preceding taxable years.

Despite this conformity, the Ohio Board of Tax Appeals and the ODT have consistently emphasized that meeting the federal definition is a necessary, but not sufficient, condition for claiming the Ohio credit. Taxpayers must adhere to strict procedural and jurisdictional mandates, most notably the requirement that all qualifying activities be performed within the state of Ohio. This geographical limitation creates a divergence from federal law, which allows for research conducted across all U.S. states and territories.

Core Components of the Ohio R&D Investment Credit

Provision	Detail	Statutory Reference
Credit Rate	7% of excess QREs	R.C. 5751.51(B)(1)
Base Amount	3-year historical Ohio QRE average	R.C. 5751.51(B)(1)
Applicability	Nonrefundable against CAT liability	R.C. 5751.51(A)
Carryforward	Up to 7 years	R.C. 5751.51(B)(2)
Nexus Requirement	Must be “incurred in this state”	R.C. 5751.51(B)(1)

The Theoretical Framework of the Process of Experimentation

The Process of Experimentation (POE) test is codified as the fourth pillar of the federal four-part test under IRC § 41(d). While the other three tests—the Section 174 (Uncertainty) test, the Technological Nature test, and the Business Component test—establish the “what” and “why” of research, the POE test establishes the “how”. It is designed to ensure that the credit is awarded only to activities that follow a scientific methodology rather than simple trial and error or routine troubleshooting.

The Evolution from Discovery to Uncertainty

Historically, the R&D credit required a “discovery of information” that was new to the world. However, modern interpretations adopted by Ohio focus on whether the information is new to the taxpayer. The POE test serves as the mechanism through which this “new” information is obtained. Treasury Regulation § 1.41-4(a)(5) defines the process as one designed to evaluate one or more alternatives to achieve a result where the capability, method, or appropriate design is uncertain at the project’s inception.

The presence of uncertainty alone does not satisfy the POE test. A taxpayer might be uncertain about the design of a product, but if they simply proceed with a single design without evaluating alternatives, they fail the fourth test. This distinction is critical in ODT audits, where the lack of documented alternatives is a leading cause for credit denial.

Deconstructing the Four-Part Test in an Ohio Context

To qualify for the Ohio R&D Investment Tax Credit, a taxpayer’s activities must pass each of the following four tests. Failure on any single test renders the entire business component ineligible for the credit.

The Section 174 Uncertainty Test

The research must be intended to discover information that would eliminate uncertainty concerning the development or improvement of a business component. Uncertainty is defined by the objective unavailability of the capability, method, or appropriate design for the product or process. The ODT distinguishes “technological uncertainty” from “economic uncertainty,” meaning that doubts about whether a product will sell or whether a project will be profitable do not count toward the R&D credit.

The Technological Nature Test

The process of experimentation used to discover the information must fundamentally rely on the principles of the physical or biological sciences, engineering, or computer science. Activities relying on social sciences, art, or humanities are expressly excluded from the definition of qualified research. For example, a marketing study designed to test consumer preferences for a new car color would fail this test, whereas a study to test the chemical durability of a new green paint formulation against UV degradation would pass.

The Business Component Test

The research must be intended to result in a new or improved business component, which is defined as any product, process, computer software, technique, formula, or invention to be held for sale, lease, or license, or used in the taxpayer’s trade or business. In Ohio, this often applies to manufacturing processes (internal use) or manufactured goods (external sale).

The Process of Experimentation Test

Finally, the POE test requires that “substantially all” (80% or more) of the activities constitute elements of a process of experimentation for a qualified purpose. This test mandates a structured methodology: identifying the uncertainty, formulating a hypothesis, identifying alternatives, and executing an evaluative process such as modeling, simulation, or systematic trial and error.

The “Substantially All” Rule and the 80% Threshold

The concept of “substantially all” is a quantitative measure that governs the eligibility of an entire business component. In the context of the POE test, it means that at least 80% of the taxpayer’s activities, measured by cost or other reasonable basis (such as hours), must be elements of the process of experimentation.

Direct Supervision and Direct Support

A significant development in the application of the POE test involves how non-researcher time is counted. Wages for “qualified services” under IRC § 41(b)(2)(B) include not only the scientists conducting the research but also those engaged in the “direct supervision” or “direct support” of such research.

The Seventh Circuit’s ruling in Little Sandy Coal Co. v. Commissioner—which has substantial influence on tax practitioners in Ohio—clarified that while supervisors and support staff can be included in the QRE total, their activities must be specifically mapped to the experimentation process to count toward the 80% numerator. If a supervisor spent 50% of their time on administrative tasks and 50% on direct oversight of laboratory tests, only the latter is considered part of the POE numerator.

Mathematical Application of the 80% Rule

The 80% test is applied at the business component level. If a project consists of five phases, but only four represent true experimentation, the project may still qualify if the costs of those four phases exceed 80% of the total project cost.

Project Phase	Activity Type	Inclusion in POE Numerator?	Percentage of Total Effort
Phase 1: Conceptualization	Idea generation, market research	No	5%
Phase 2: Technical Design	Identifying design uncertainties	Yes	15%
Phase 3: Prototype Build	Fabrication of test models	Yes	30%
Phase 4: Laboratory Testing	Evaluation of alternatives	Yes	40%
Phase 5: Commercial Prep	Final packaging, user manuals	No	10%
Total		85% (Qualified)	100%

Ohio Department of Taxation Administrative Guidance

The ODT provides guidance through Information Releases, Administrative Rules, and Final Determinations that clarify how the state interprets the POE test differently from or in conjunction with federal standards.

Administrative Code 5703-29-22

Ohio Administrative Code 5703-29-22 serves as the primary regulatory guide for the CAT R&D credit. It stipulates that the credit must be computed based on expenses incurred during the calendar year, regardless of the taxpayer’s federal taxable year. For quarterly taxpayers, the credit is typically claimed on the fourth quarter return, due in February. The rule emphasizes that the credit is nonrefundable and cannot be transferred unless authorized by statute, though it allows for a 7-year carryforward of unused amounts.

Jurisdictional Situsing: The “Incurred in Ohio” Rule

A critical divergence from federal law is found in the “situsing” of expenses. Under R.C. 5751.51(B)(1), only QREs “incurred in this state” qualify. The ODT strictly interprets this to mean that the physical performance of the research activities must take place in Ohio. In Cristal USA v. Ohio Department of Taxation, the Tax Commissioner disallowed credits because the taxpayer could not substantiate that plant trial activities, while involving experimentation, were conducted specifically at their Ohio facilities rather than other global locations.

Substantiation and the Audit of Representative Samples

The ODT has the statutory authority to audit a sample of a taxpayer’s qualified research expenses over a representative period to determine the validity of the credit claim. Documentation must be retained for at least four years from the date the return was filed.

The ODT’s audit standards for the POE test are rigorous. Auditors look for:

• Project Nexus: Proof that the researcher was physically in Ohio during the experimentation.
• Narrative of Experimentation: A clear explanation of the uncertainty, the alternatives evaluated, and the results of those evaluations.
• Contemporaneous Records: Laboratory notebooks, time logs, and testing data produced at the time of the research, rather than retrospective reconstructions.

The Impact of Commercial Activity Tax Reforms (2024-2025)

The landscape of the Ohio R&D credit is currently shifting due to the massive restructuring of the CAT exclusion amounts.

Exclusion Threshold Adjustments

Prior to 2024, the CAT exclusion was set at $1 million of Ohio taxable gross receipts (TGR). Businesses exceeding this amount were subject to the 0.26% tax rate and could apply R&D credits to offset that liability. The 2023 legislative changes have drastically altered this threshold:

Tax Year	TGR Exclusion Amount	CAT Minimum Tax	R&D Credit Utilization Impact
Pre-2024	$1,000,000	$150 – $2,600	High utility for small/mid-size firms.
2024	$3,000,000	Eliminated	Smaller firms no longer need the credit.
2025+	$6,000,000	Eliminated	Credit utility limited to large scale-ups.

For businesses with Ohio gross receipts under $6 million in 2025, the R&D credit will no longer provide an immediate tax offset, as they will have no CAT liability. However, the R.C. 5751.51 credit remains vital because it can be carried forward for seven years. Startups and scaling firms must continue to document their POE tests to “bank” these credits for future years when their revenue exceeds $6 million.

Industry-Specific Interpretations of Experimentation

The meaning of “experimentation” varies significantly across sectors. The ODT and federal guidance provide specific frameworks for interpreting POE in manufacturing, software, and engineering services.

Software Development: Internal Use vs. Commercial

Software development is often scrutinized under the POE test to ensure the activities aren’t just routine coding. For software to pass the POE test, it must resolve uncertainties related to computer science.

• Qualifying Activities: Developing new encryption algorithms, optimizing data structures for massive scaling, or creating novel heuristic engines.
• Non-Qualifying Activities: Functional enhancements using standard tools, cosmetic interface changes, or creating web forms with existing libraries.

For Internal Use Software (IUS)—software used for the taxpayer’s own administrative tasks—the bar is even higher, requiring that the software be innovative and involve significant economic risk.

Manufacturing and the Pilot Model Exception

In the manufacturing sector, the POE test often involves “pilot models”—prototypes or first-of-their-kind machines used to test new production processes. The ODT evaluates whether the cost of building these models qualifies as QRE. Under modern interpretations, the construction of a pilot model is considered part of the POE if the model is used to resolve uncertainties about the design of the ultimate product or process.

Architecture and Engineering (A&E) Services

The Phoenix Design case highlighted the dangers for A&E firms. The firm attempted to claim that standard architectural design phases (Schematic Design, Design Development) inherently satisfied the POE test. The court rejected this, stating that the taxpayer must show specific technical uncertainties were resolved through experimentation during those phases. Simply following industry standards (like NFPA 13 for sprinkler systems) is considered “adaptation” of an existing component rather than R&D.

Comprehensive Case Study: Advanced Glass Tempering Process

To provide a concrete application of the POE test under Ohio law, consider “Buckeye Glass Tech,” a manufacturing company based in Toledo, Ohio.

The Technical Objective

The company aims to develop a new thermal tempering process for ultra-thin glass (less than 1mm) that will be used in flexible electronics. Traditional tempering methods cause the thin glass to warp or shatter.

Part 1: Section 174 (Uncertainty)

Buckeye Glass Tech establishes that their engineers do not know the exact cooling rate or nozzle configuration required to temper 0.5mm glass without deformation. This establishes “design uncertainty”.

Part 2: Technological Nature

The project relies on principles of thermodynamics and material science (hard sciences) to understand how the glass’s molecular structure reacts to rapid temperature changes.

Part 3: Business Component

The business component is a new industrial process (the tempering technique) to be used in their trade.

Part 4: Process of Experimentation (The Evaluative Loop)

The team in Toledo conducts the following iterative steps:

1. Modeling: Using computational fluid dynamics (CFD) to simulate airflow across the glass surface.
2. Alternatives: Evaluating three different cooling gasses (Nitrogen, Compressed Air, and a Helium-Argon mix) to see which provides the most uniform thermal reduction.
3. Testing: Fabricating a pilot tempering line in their Toledo facility and running 50 test sheets of glass.
4. Analysis: Measuring the “bow” (warpage) of each sheet and correlating it back to the gas mixture and cooling speed.
5. Failure and Re-design: Finding that pure Nitrogen failed to prevent warpage, they adjusted the nozzle angle by 15 degrees and introduced a pulsed cooling method.

Part 5: Calculating the Ohio Credit

Buckeye Glass Tech tracks the wages of four Ohio-based engineers, the cost of the test glass, and the 65% of fees paid to a local Ohio university for specialized thermal imaging.

$$ \text{Current Year Ohio QREs} = \$1,200,000 \\ \text{Base Amount (3-year average)} = \$800,000 \\ \text{Qualified Excess} = \$400,000 $$

$$ \text{Ohio R&D Credit} = \$400,000 \times 0.07 = \$28,000 $$

Interaction with JobsOhio R&D Investment Programs

Taxpayers conducting high-level R&D in Ohio have access to additional incentives that complement the CAT R&D credit. The JobsOhio Research and Development Investment Loan Fund offers financing between $500,000 and $5 million for projects that create high-wage R&D jobs.

A unique feature of this loan is that businesses can receive a nonrefundable CAT credit for 100% of the principal and interest payments made on the loan during the year, typically capped at $150,000 annually. This is distinct from the 7% investment credit and provides a dollar-for-dollar offset. To qualify for the loan and the corresponding credit, the project must satisfy similar POE requirements, focusing on discovering information that is technological in nature and intended for the commercialization of new products or processes.

Common Pitfalls in POE Substantiation

Through the analysis of ODT Final Determinations and federal court cases, several common failures in satisfying the POE test have been identified.

Failure to Identify Specific Information Sought

The POE test requires the taxpayer to identify the specific information they intended to discover to eliminate the uncertainty. Broad statements like “we wanted to make the machine better” are insufficient. The ODT expects a technical description: “we needed to determine if an aluminum alloy with 5% magnesium could withstand 500 psi of pressure without fatigue cracking”.

Misinterpreting “Trial and Error”

While systematic trial and error is a valid process of experimentation, it must be systematic. This means the results of one test must inform the next. Randomly trying different parts until one works is considered “routine troubleshooting” and is often disqualified by the ODT upon audit.

The “All or Nothing” Trap of the 80% Rule

If a taxpayer includes a business component in their claim where only 60% of the activities constitute POE, the entire project is disqualified from the credit. Many taxpayers fail to segment their projects properly, leading to the disqualification of large pools of expenses that might have qualified if they had been broken down into sub-components.

Future Outlook and Strategic Recommendations

The Ohio R&D Investment Tax Credit remains one of the most stable and valuable incentives in the state’s tax code, having been maintained throughout several rounds of CAT reform. However, as the 2025 CAT exclusion threshold of $6 million takes effect, the ODT is expected to shift its audit focus toward larger taxpayers with more complex R&D profiles.

Strategic Documentation Practices

To ensure a “bulletproof” defense of the POE test, Ohio businesses should adopt the following practices:

• Project Modularization: Break down large, multi-year initiatives into smaller business components. This helps preserve the 80% “substantially all” threshold if a portion of a project is found to be non-experimental.
• Contemporaneous Mapping: Use time-tracking software that allows employees to tag hours to specific research tasks (e.g., “alternative evaluation,” “modeling,” “simulation”) rather than general project codes.
• Preserve Failure: Keep records of failed prototypes and negative test results. These are the strongest evidence that technical uncertainty existed and that a process of experimentation was necessary to resolve it.
• Ohio-Specific Tracking: For companies with multi-state operations, maintain a strict log of where each employee was physically located when they performed their research to satisfy the R.C. 5751.51(B)(1) nexus requirement.

The Process of Experimentation test is more than a legal hurdle; it is a standard of scientific rigor. For Ohio businesses, successfully navigating this test requires a fusion of engineering documentation and tax law expertise. By centering their R&D claims on a systematic, iterative evaluation of alternatives conducted within the state, taxpayers can continue to benefit from Ohio’s commitment to incentivizing the next generation of industrial and technological breakthroughs.