This study examines International Flavors & Fragrances Inc. v. Commissioner alongside the separate legal framework for the federal research credit. The 1975 IFF decision concerned foreign-currency gain, not research-credit eligibility. Its factual inquiry offers a general analogy about substantiation; it did not establish the Section 41 process-of-experimentation test or decide whether IFF’s research qualified for a credit.

The Historical Precedent: International Flavors & Fragrances Inc. v. Commissioner (1975)

In 1966, IFF contracted to sell 1.1 million pounds sterling to First National City Bank. After sterling’s devaluation, Amsterdam Overseas Corp. paid IFF $387,000 for the contract in December 1967. IFF treated the receipt as long-term capital gain. The Tax Court majority applied the Corn Products doctrine to characterize it as ordinary income; a concurrence instead viewed Amsterdam as acting for IFF, supporting short-term capital treatment.

On appeal, the Commissioner abandoned reliance on Corn Products and Section 1233. The Second Circuit reversed and remanded because the Tax Court majority had not resolved whether a genuine sale occurred under Section 1222(3). The appellate court did not itself find the arrangement deceptive or conclusively determine its tax character.

Technical Foundations of Innovation in the Flavor and Fragrance Industry

Flavor and fragrance development combines scientific investigation with creative work. IFF’s 2006 Form 10-K describes disciplines including organic chemistry, microbiology, food science, process engineering and sensory science. Its work included natural ingredients, synthetic molecules and controlled-release systems. Scientific work and artistic preference testing require different tax treatment.

For example, a hypothetical project might test whether a fragrance remains chemically stable in an alkaline detergent. A separate exercise might ask consumers which scent they prefer. Neither the commercial value of the finished product nor the use of laboratory equipment alone establishes credit eligibility. The relevant questions concern the uncertainty, investigation and qualifying purpose of the actual activities.

IFF’s 2024 Form 10-K identifies approximately 3,400 people working globally in R&D, including innovation, creation and design. It describes work on materials, compounds and delivery technologies. These disclosures establish the scale and breadth of activity, not the amount eligible for a U.S. research credit.

The 2024 expense equaled approximately 5.8% of sales, rather than 8%. The historical figures reflect different business portfolios and accounting presentations, so they are not a constant-scope growth series. Financial-statement R&D expenses must also be distinguished from qualified research expenses for tax purposes.

Section 41 and the Four-Part Test

Section 41 supplies the research-credit requirements independently of the IFF currency decision. For taxable years beginning after December 31, 2024, its expenditure cross-reference is to domestic research or experimental expenditures under Section 174A. Earlier years require the law applicable to those years.

• Research expenditure requirement: The work must meet the applicable research or experimental expenditure standard.
• Technological information: The investigation must rely on physical or biological science, engineering or computer science.
• Business component and permitted purpose: The intended improvement must concern function, performance, reliability or quality of a qualifying component, such as a formula or process.
• Experimentation: Substantially all relevant research activities must constitute elements of a qualifying process of experimentation.

A hypothetical encapsulation project could document an unresolved stability question, alternative carrier materials, test conditions, results and resulting design changes. This is an illustrative documentation approach, not a finding about any actual IFF project.

Little Sandy Coal and the Process of Experimentation

In Little Sandy Coal Co. v. Commissioner, the Seventh Circuit affirmed denial of research credits in 2023. The claim covered eleven vessels, with two selected for trial. The taxpayer did not provide a principled basis for measuring qualifying experimentation. A novel vessel or production process did not, by itself, establish the required activities.

The court also rejected categorically excluding direct support and supervision from the experimentation numerator while including them in the denominator. Such activities can qualify when their connection to experimentation is established. Building a prototype does not automatically make all production costs eligible.

Treasury Regulation Section 1.41-4 measures the 80% threshold by cost or another consistently applied reasonable basis, separately for each business component:

Experimentation percentage = activities constituting elements of qualifying experimentation ÷ relevant research activities for that component × 100.

This is an activity measurement, not a ratio of all company spending or all creditable expenses. Where the whole component fails, the shrink-back rule may permit consideration of a qualifying subset.

The separate New Jersey case, International Flavors & Fragrances Inc. v. Union Beach Borough (2004), addressed local property-tax treatment of research facilities and equipment. Its discussion of pilot-plant operations does not establish federal Section 41 eligibility.

Substantiation and IRS Review of Refund Claims

The IRS distinguishes whether an amended-return research-credit refund claim is sufficiently specific from whether its expenses ultimately qualify. Its published guidance does not establish a universal automated system requiring “bulletproof” evidence for every claim.

Under the IRS’s June 18, 2024 update, a refund claim must identify the business components, the research activities for each component, and total qualified employee wage, supply and contract-research expenses. The IRS waived the initial requirements to identify each individual and what each individual sought to discover, while retaining the ability to request information during examination. Original-return requirements and the applicable Form 6765 instructions require separate attention.

Useful project records include laboratory notebooks, formulation histories, test data, design changes, payroll allocations and contracts. These should connect the technical work to the amounts claimed. Contemporaneous records usually strengthen that connection, but the rules do not prescribe one universal time-tracking system or automatically reject every reconstruction.

Betz v. Commissioner, T.C. Memo. 2023-84, concerned air-pollution-control systems. The court found failures to substantiate pilot-model production costs and qualified employee services, and found insufficient retained rights for five projects. It also sustained accuracy-related penalties. The decision should not be reduced to a blanket prohibition on retrospective interviews or estimates.

Funded Research and Customer Contracts

Treasury Regulation Section 1.41-4A(d), incorporated into the current research-credit regulations, requires analysis of both financial risk and substantial rights. Payments contingent on successful research generally do not constitute funding. Research can be fully funded when the performer retains no substantial rights, even if it incurs costs exceeding payment.

Customer exclusivity or patent ownership alone does not resolve every case. A performer may retain meaningful rights to use research results without owning every patent; conversely, incidental experience is not necessarily a substantial right. Fixed-price and hourly contracts require examination of their actual obligations, payment terms and remedies.

The summary-judgment proceedings in Smith and System Technologies illustrate the importance of contract interpretation and applicable law. Denial of the IRS’s summary-judgment motion should not be described as a final allowance of every claimed credit. Nor does an ordinary breach-of-contract remedy automatically establish that payment depends on successful research.

Acquisitions and Historical Research Expenses

IFF acquired Frutarom in 2018 and combined with DuPont’s Nutrition & Biosciences business in 2021. Such transactions can complicate reconstruction of historical research expenses. Their effect on any particular credit depends on the acquired business, transaction structure and applicable calculation method.

Section 41(f)(3) contains acquisition and disposition adjustment rules involving historical research expenses and gross receipts. The calculation requires more than simply adding the target’s worldwide accounting R&D expenses to a tax base.

United Therapeutics Corp. v. Commissioner, decided by the Fourth Circuit in 2024, addressed coordination of the research credit with the orphan-drug credit. It upheld inclusion of relevant prior-year clinical-testing expenses in the historical calculation. This was not an acquisition-adjustment case, and the opinion should not be characterized as establishing an acquisition-related penalty rule.

A practical acquisition review should reconcile legal entities, project locations, expense classifications, contracts and prior calculations. Unsupported assumptions about acquired laboratory counts cannot substitute for the underlying tax records.

The Future of R&D Tax Planning

Planning should reflect enacted law and documented research activity. A speculative market-size forecast does not establish either future credit availability or company-specific eligibility.

Domestic R&D Expensing and Cash Flow

For taxable years beginning in 2022 through 2024, Section 174 generally required five-year amortization of domestic research costs and fifteen-year amortization of foreign research costs. Legislation enacted July 4, 2025 added Section 174A, generally restoring immediate deductions for domestic research or experimental expenditures for taxable years beginning after December 31, 2024, with an optional capitalization approach.

Foreign research costs remain subject to fifteen-year amortization under Section 174. Transition provisions address unamortized domestic costs from 2022–2024 and retroactive relief for eligible small businesses. Revenue Procedure 2025-28 supplies election and accounting-method procedures. Eligibility, deadlines and coordination with Section 280C require tax-year-specific review; immediate deductibility does not automatically establish research-credit eligibility.

Global Minimum Tax and Pillar Two Interactions

Pillar Two generally targets a 15% jurisdictional effective tax rate for in-scope multinational groups. Its effects depend on local implementation, the type of incentive, covered-tax adjustments and available safe harbours. A low financial-statement tax rate alone does not establish a top-up liability.

The OECD’s January 2026 package introduced additional safe harbours, including provisions for certain substance-based tax incentives and eligible parent-jurisdiction tax systems. Domestic minimum top-up taxes remain relevant. It is therefore misleading to assume that every R&D credit is offset by a tax elsewhere, or to attribute these rules to the 1975 IFF decision.