Tangel v. Commissioner, T.C. Memo. 2021-1, illustrates how contractual restrictions on research results can trigger the funded research exclusion under Internal Revenue Code (IRC) Section 41(d)(4)(H). The Tax Court granted partial summary judgment to the IRS concerning one project performed by Enercon Engineering, Inc. for Vericor Power Systems, LLC. It held that Enercon retained no substantial rights in the research results. The opinion did not decide entitlement to all $929,668 in credits claimed across Enercon’s 142 projects.
The Statutory and Regulatory Architecture of Section 41
Section 41 provides a federal credit for qualifying research expenditures, subject to statutory definitions, exclusions, expense rules, and computational limitations. Technical difficulty, engineering sophistication, or development of a custom product does not by itself establish eligibility.
The Four-Part Test of Qualified Research
For the 2008–2010 tax years at issue in Tangel, the expenditure requirement referred to research and experimental expenditures eligible for treatment under Section 174. Research must address uncertainty concerning the capability or method of developing or improving a business component, or its appropriate design. For taxable years beginning after December 31, 2024, the amended Section 41(d)(1)(A) refers to Section 174A. The later statutory change does not alter the historical law applied in Tangel.
The technological-information requirement calls for research that fundamentally relies on physical or biological sciences, engineering, or computer science. The information must be intended to be useful in developing a new or improved business component: a product, process, computer software, technique, formula, or invention held for sale, lease, or license, or used in the taxpayer’s trade or business.
The process-of-experimentation requirement calls for substantially all relevant research activities to constitute elements of a process designed to evaluate alternatives and resolve technical uncertainty. Permitted purposes concern function, performance, reliability, or quality. Under Treasury Regulation Section 1.41-4(a)(6), substantially all means at least 80%, measured on a cost or other consistently applied reasonable basis. The test is applied to each business component, subject to the shrinking-back rule. Modeling, simulation, and systematic trial and error can qualify when the facts establish an actual evaluative process.
The Funded Research Exclusion and the Mirror Image Rule
Section 41(d)(4)(H) excludes research to the extent another person or governmental entity funds it. Treasury Regulation Section 1.41-4(c)(9) incorporates the funding rules in Section 1.41-4A(d). All relevant agreements must be considered. The analysis examines both payment terms and the rights retained by the research performer.
| Factor | Regulatory Basis | Impact on Tax Credit Eligibility |
|---|---|---|
| Economic Risk | Treas. Reg. § 1.41-4A(d)(1) and (3); § 1.41-2(e)(2) | Amounts payable contingent on research success are not treated as funding. Noncontingent payments generally fund the research to the applicable extent. |
| Substantial Rights | Treas. Reg. § 1.41-4A(d)(2) and (3) | A performer retaining no substantial rights is treated as fully funded, even if its expenditures exceed the payment received. |
The related contractor and customer rules are often called mirror image rules. A customer may include generally 65% of eligible contract research payments in qualified research expenses when the applicable conditions are satisfied. This is an expense inclusion percentage, not a 65% tax credit. Customer eligibility requires a separate analysis; denial of the contractor’s credit does not automatically establish the customer’s entitlement.
Retained substantial rights need not be exclusive. Where the performer retains those rights but receives noncontingent funding, the regulations may allow an allocated credit for qualifying research expenses exceeding the funding. Thus, the rules are not always an all-or-nothing choice between the parties. Where no substantial rights remain, however, the research is treated as fully funded.
Factual Background of Tangel v. Commissioner
Edward J. and Beatrice C. Tangel and the petitioners in the consolidated cases claimed credits flowing through from Enercon, an S corporation designing and producing integrated controls and switchgears for custom power-generation applications. Enercon claimed $929,668 in research credits for 2008–2010 across 142 projects. The IRS disallowed the flow-through credits for insufficient documentation establishing compliance with Section 41.
The motion decided in Tangel concerned only Project No. 37688. Vericor hired Enercon in February 2009 to develop an enclosure according to existing designs, provide assembly, integration, controls, and packaging for a new turbine-generator unit, and redesign or retrofit three existing units. The court expressly stated that the partial-summary-judgment ruling did not affect entitlement to credits for other projects. It resolved the funded research issue without deciding the alternative substantiation argument.
Judicial Analysis of the Substantial Rights Requirement
Treasury Regulation Section 1.41-4A(d)(2) treats research as fully funded when the performer retains no substantial rights under the agreement. The court applied that existing rule by examining Enercon’s contractual ability to use the research results.
The Paragraph 15 Impediment
Paragraph 15, concerning designs, drawings, and data, defined protected information broadly. It covered information supplied by Vericor as well as information Enercon developed at Vericor’s expense or to meet Vericor’s technical requirements. It restricted use for other customers without prior written consent and more broadly prohibited use or disclosure outside work for Vericor. Information and copies had to be returned on request. These restrictions covered research outputs, not merely confidential information supplied by the customer.
Copyright and Works Made for Hire
Paragraph 15(B) designated information prepared for the order, including original works of authorship, as works made for hire and deemed Vericor the author. It also assigned all right, title, and interest to Vericor if a court determined that a work did not qualify as a work made for hire. The fallback assignment mattered because a contractual label alone does not determine statutory copyright status. The court assessed these ownership provisions together with the extensive restrictions on use.
The Rejection of Institutional Knowledge
The petitioners argued that Enercon retained institutional knowledge for future projects. The court distinguished increased employee knowledge or experience from enforceable rights in the research results. Such incidental benefits did not satisfy the regulation. The possibility of obtaining Vericor’s permission also did not supply substantial rights because Vericor’s discretion to withhold consent was unrestricted.
Comparative Jurisprudence: Distinguishing Precedent
Tangel should be understood alongside decisions recognizing retained rights under different agreements. It did not establish that customer ownership of deliverables automatically disqualifies every contractor.
Lockheed Martin and the Non-Exclusive Standard
In Lockheed Martin Corp. v. United States, 210 F.3d 1366 (Fed. Cir. 2000), the contractor possessed contractual rights to use the research in its business. Those rights did not have to be exclusive. The Federal Circuit rejected treating restrictions imposed by export-control law as eliminating the substantial rights retained under the agreements. Tangel distinguished that situation: Enercon’s own agreement restricted its use of the results. The decisions both focus on rights under the parties’ contracts.
Populous Holdings and the Retention of Methodology
In Populous Holdings, Inc. v. Commissioner, Docket No. 405-17, order dated December 6, 2019, the Tax Court found unfunded research under five representative architectural contracts. For the three contracts with disputed retained rights, ownership of documents or copyrights did not establish exclusive ownership of all research results. The agreements did not prohibit use of the related research technology in the firm’s business or require payment for that use. Restrictions on particular architectural features and provisions about repetitive design details required contract-specific interpretation. The order does not establish that general experience alone qualifies as a substantial right.
| Case Comparison | Ownership of IP/Copyright | Contractual Prohibition on Use | Court Ruling on Substantial Rights |
|---|---|---|---|
| Lockheed Martin | Government and contractor held rights under the agreements. | Contractor retained business-use rights; export restrictions arose under law. | Substantial rights retained; exclusivity was unnecessary. |
| Populous Holdings | Clients owned specified documents and, under some contracts, architectural copyrights. | No prohibition on business use of related research technology or payment requirement for that use. | Substantial rights retained under the disputed contracts. |
| Tangel (Enercon) | Vericor received project information and work-product rights through ownership and assignment terms. | Broad restrictions on use outside the Vericor work without consent. | No substantial rights retained for Project No. 37688. |
Analysis of Economic Risk in Contracting
Payment terms remain relevant even when substantial rights are retained. Under Section 1.41-4A(d)(1), amounts payable contingent on research success are not funding. Where payments are noncontingent, the funding and allocation rules must be applied.
The Success Contingency
A fixed-price agreement may place the cost of unsuccessful research on a contractor that must deliver an agreed result and remedy failures without additional compensation. A time-and-materials agreement commonly reimburses effort regardless of outcome. Neither label substitutes for reading the payment, termination, performance, warranty, and revision provisions together. Ordinary cost-overrun exposure alone does not conclusively establish the relevant research risk.
In Tangel, the petitioners did not contend that Vericor’s payments were contingent on research success. The court stated that this factor therefore did not apply and decided the dispute on retained rights. The opinion should not be described as finding that Enercon passed the economic-risk test.
Acceptance and Inspection Clauses
Fairchild Industries, Inc. v. United States, 71 F.3d 868 (Fed. Cir. 1995), focuses the inquiry on who bears the cost of unsuccessful research. Customer acceptance, payment disputes, and required corrective work can help establish the allocation of risk, but an inspection clause is not an automatic qualification rule. In Populous, the court considered the fixed-price obligations and other terms together and found that failed research would require additional contractor expenditures without additional compensation.
Documentation and the Process of Experimentation Test
Technical qualification and substantiation remain separate from funding. Tangel did not decide whether Enercon’s activities satisfied the experimentation requirement. Phoenix Design Group, Inc. v. Commissioner, T.C. Memo. 2024-113, addressed three trial projects drawn from a larger group and held that none entailed qualified research. It also imposed accuracy-related penalties under the parties’ stipulations. The case does not establish an automatic penalty for missing time records or a universal requirement to use a particular documentation system.
Records should connect the claimed work to technical uncertainties, alternatives evaluated, the methods of evaluation, and the related expenses. Engineering complexity and compliance with building codes do not, without further evidence, demonstrate a qualifying process of experimentation. Treasury Regulation Section 1.41-4(d) requires records in sufficiently usable form and detail to substantiate eligibility.
| Requirement | Documentation Standard Post-Phoenix Design | Risk of Non-Compliance |
|---|---|---|
| Section 174 Test | For the historical years, support the relevant technical uncertainty and experimental nature of the work. Apply the Section 174A cross-reference for current applicable years. | Activities may fail the expenditure requirement; routine work does not qualify merely because engineers perform it. |
| Process of Experimentation | Show the alternatives and evaluative process through design records, modeling, simulations, testing, or other reliable evidence. | Unsupported activities may be excluded. Penalties require a separate statutory analysis and consideration of applicable defenses. |
| Substantially All Test | Support the 80% threshold by cost or another consistently applied reasonable basis. Activity-level time records can help but are not the sole permitted method. | The business component may fail the test; consider supported subsets under the shrinking-back rule. |
The Shrinking-Back Rule
Treasury Regulation Section 1.41-4(b)(2) requires applying the qualification tests first to the business component and then, if necessary, to its most significant subset of elements, continuing until a qualifying subset is reached or the most basic element fails. The rule cannot compensate for absent evidence identifying qualifying activities and associated expenses. Little Sandy Coal Co. v. Commissioner, 62 F.4th 287 (7th Cir. 2023), illustrates the need for a record that supports the analysis at the relevant component or subset level. It does not prescribe one exclusive form of contemporaneous documentation.
Implications for Future R&D Tax Credit Applications
Tangel illustrates that funding can be dispositive before the court reaches technical qualification. It supports early review of contracts and research records together, rather than a claim that the IRS must now reject an entire industry’s credits.
Contractual Vulnerability
Broad restrictions on using research results can eliminate substantial rights. Ownership clauses, work-for-hire provisions, confidentiality obligations, and return-of-information requirements should be read as an integrated agreement. Customer ownership alone is not conclusive. An enforceable, nonexclusive right to use relevant research results without paying the customer may preserve substantial rights, depending on the agreement as a whole. Tangel does not require one specific contractual phrase.
The Nuclear and Specialized Engineering Sector
The same analysis can apply to power-generation and other specialized engineering projects. Safety requirements and technical complexity do not establish either qualified research or retained rights. Tangel involved Enercon Engineering, Inc.; it supplies no factual basis to determine the tax eligibility or contract terms of another similarly named company. Any application to nuclear studies, seismic assessments, or decommissioning work must be based on that taxpayer’s actual activities and agreements.
Strategic Recommendations for Taxpayers
Legal, tax, and engineering teams should review intended rights and payment obligations before signing agreements. Where commercially appropriate, clearly defined retained-use rights or a license-back can address customer ownership while preserving the contractor’s ability to use relevant research results. Such terms must be legally effective and consistent with confidentiality and other restrictions; they do not independently guarantee a credit.
Maintain records explaining uncertainties, alternatives, evaluation methods, results, and expense allocations. Activity-level time tracking is useful when it reflects the work accurately, but the governing standard is sufficient, reliable substantiation. Generic narratives and unsupported percentage estimates can fail to establish eligibility. Funding, technical qualification, and expense measurement each require support.
Mathematical Modeling of the R&D Credit Formula
The regular incremental credit generally equals 20% of current-year qualified research expenses exceeding the statutory base amount, subject to the base-amount rules and other limitations. An alternative simplified credit generally equals 14% of current-year qualified research expenses exceeding 50% of average qualified research expenses for the preceding three years; special rules apply where the taxpayer lacks qualified research expenses in one of those years. Section 280C coordination and other applicable limitations can affect the tax benefit.
Regular incremental credit component = 20% × max(0, current-year qualified research expenses − applicable base amount).
If research is fully funded because the performer retains no substantial rights, its expenses for that research do not enter the performer’s qualified research expenses. Excluding one project does not necessarily eliminate the taxpayer’s other eligible expenses or its entire credit. Enercon’s $929,668 represented the aggregate claim across 142 projects; Tangel did not attribute that entire amount to Paragraph 15 of the Vericor agreement.
Future Outlook: Legislative and Administrative Trends
Contract analysis remains relevant under the funded research regulations. Tangel itself does not substantiate a quantified increase in audits or establish a new IRS enforcement campaign. Its practical significance is the application of existing rules to restrictive contract language.
The Tax Cuts and Jobs Act required capitalization and amortization of research expenditures for taxable years beginning after December 31, 2021, generally over five years for domestic research and fifteen years for foreign research. Public Law 119-21, enacted July 4, 2025, changed that framework. Section 174A generally permits current deductions for domestic research or experimental expenditures in taxable years beginning after December 31, 2024, with an alternative capitalization election. Foreign research remains subject to fifteen-year amortization under Section 174. Transition provisions address certain earlier domestic expenditures; eligibility and elections require separate review. IRS Revenue Procedure 2025-28 provides implementing procedures.
Deduction treatment and Section 41 credit eligibility remain distinct. A deductible expenditure does not automatically qualify for the credit, and Tangel’s funding analysis is not displaced by Section 174A. Little Sandy Coal recognized that certain pilot-model production activities may count as elements of experimentation when the facts support that treatment, while affirming the denial for inadequate proof. That holding does not remove the separate funded research exclusion.
Final Thoughts
Tangel demonstrates the importance of enforceable rights in research results. For Project No. 37688, restrictions on use and broad ownership provisions left Enercon without substantial rights; incidental institutional knowledge did not change that outcome. Contractors should assess retained rights, payment terms, technical activities, and supporting records together. The decision is a contract-specific application of existing law, not a blanket prohibition on research credits for customer-funded engineering businesses or every work-for-hire arrangement.
