This study provides an exhaustive analysis of the United States federal and North Carolina state Research and Development (R&D) tax credit requirements, evaluating their specific application to the evolving industrial landscape of Gastonia, North Carolina. The assessment details the historic economic development of the region and presents five unique industry case studies, analyzing their engineering activities against rigorous statutory tax frameworks and recent federal and state judicial precedents.

Industrial Evolution and R&D Case Studies in Gastonia, North Carolina

To understand the application of federal and state R&D tax credits within Gastonia, it is imperative to first analyze why and how specific industries developed within this localized geographic environment. Incorporated in 1877 at the conclusion of the Reconstruction era, Gastonia’s initial economic catalyst was purely logistical: the strategic realignment and intersection of the Atlanta & Charlotte Airline Railroad (now Norfolk Southern) and the Chester and Lenoir Narrow Gauge Railroad (now CSX). This vital transportation nexus permitted the rapid introduction and expansion of steam-powered textile mills, transforming a microscopic railroad depot into the economic engine of Gaston County. By 1900, the establishment of the Arlington Cotton Mills introduced the combed yarn process to the American South, allowing the region to manufacture the highest quality cotton yarns previously exclusive to New England and Great Britain. Gastonia rapidly earned the moniker “the combed yarn capital of the world,” eventually hosting more than one hundred and fifty separate textile mills and supporting a massive labor force drawn by the surrounding agricultural communities.

However, the trajectory of this monolithic industrial base was permanently altered by both internal labor strife and external macroeconomic pressures. The notorious Loray Mill Strike of 1929, incited by the implementation of the exhaustive “stretch out” system, highlighted the region’s heavy reliance on a low-wage, high-hour labor model—a model that ultimately became uncompetitive as global textile manufacturing shifted to Asia and Latin America in the latter half of the twentieth century. As traditional fiber, yarn, and fabric mills shuttered, Gaston County faced a severe economic contraction. Yet, the region possessed a highly valuable residual infrastructure: an abundance of heavy industrial real estate, immense water and electrical utility capacities originally built for massive textile dyeing and finishing operations, a robust interstate highway network (I-85), and a blue-collar workforce highly skilled in machine maintenance, tooling, and industrial processing. Recognizing these assets, Gastonia successfully pivoted its economic development strategy, aggressively attracting advanced material sciences, heavy-duty automotive manufacturing, specialty chemical compounding, and energy-transition mineral processing. The following five case studies examine specific enterprises operating within this revitalized ecosystem, detailing their historical development in Gastonia and analyzing how their current operations intersect with United States R&D tax credit laws.

Case Study: Advanced Filtration and Technical Textiles (Wix Filtration Corporation)

The foundational trajectory of Wix Filtration Corporation exemplifies the evolutionary leap from agricultural textile byproducts to highly engineered automotive components. Founded in August 1939 by John Doane “Jack” Wicks and Paul G. Crawshaw, the enterprise originated in an abandoned Gastonia cotton mill with merely three employees earning an average weekly wage of eighteen dollars. The strategic selection of Gastonia was not coincidental; the region’s ubiquitous textile industry provided a continuous, low-cost supply of scrap white cotton thread waste, which Wicks and Crawshaw ingeniously repurposed as an early, highly effective fluid filtering medium. Over subsequent decades, Wix transformed from a localized textile-recycling operation into a global leader in fluid power and automotive filtration, securing historic patents such as the revolutionary “twist of the wrist” spin-on oil filter in 1954, the conical air filter in 1992, and the Cabin Air Nasties interior air cleaner in 2006. Today, operating as part of the MANN+HUMMEL group, the company maintains multiple massive facilities in the greater Gastonia area, including the 540,000 square-foot Allen Plant and the Dixon Plant in south Gastonia.

The continuous transition from organic cotton media to highly advanced synthetic media necessitates rigorous, continuous research and development. Recent initiatives include the engineering of the high-performance XP synthetic oil filter line and XP Premium Cabin Air Filters specifically engineered to capture microscopic viral aerosols. To qualify for the United States federal R&D tax credit under Internal Revenue Code (IRC) Section 41, these development activities must meet the rigorous four-part test. The development of synthetic media capable of trapping specific biological aerosols constitutes a permitted purpose, as it is a new or improved business component regarding functionality and performance. The engineering process relies fundamentally on the hard sciences of materials science, fluid dynamics, and chemistry, satisfying the technological in nature requirement. At the outset of designing a new heavy-duty filter intended to double the lifespan of commercial engine oil, Wix engineers face technical uncertainty regarding the optimal geometric alignment of synthetic fibers, the pressure-drop coefficients across the filter housing, and the material’s thermal degradation points under severe hydraulic stress.

To overcome the evidentiary burdens required by federal tax law, the company must execute a structured process of experimentation. Wix engineers achieve this by working alongside professional motorsports racing teams to subject prototype filters to extreme, real-world thermodynamic stresses. Within their Gastonia laboratories, engineers systematically test prototypes using controlled dynamometer stress testing and fluid simulation software, iteratively adjusting the pleats-per-inch ratio, the integration of glass-enhanced cellulose, and the coil tension of internal steel springs until OEM (Original Equipment Manufacturer) performance specifications are achieved. Under North Carolina state tax law, while the specific income tax credit for these activities has expired, Wix significantly benefits from the state’s mill machinery sales and use tax exemption. The highly specialized pleating machines, robotic assembly arms, and thermal curing ovens utilized within their Gastonia manufacturing facilities are exempt from state sales tax, substantially lowering the capital expenditure required to transition newly researched filtration designs into mass commercial production.

Case Study: Heavy-Duty Commercial Vehicle Engineering and Autonomous Systems (Freightliner / Daimler Truck North America)

The presence of heavy-duty commercial truck manufacturing in Gaston County is anchored by Freightliner Trucks, a subsidiary of Daimler Truck North America. Established originally in 1942 by Leland James to construct aluminum chassis for Consolidated Freightways, the company expanded out of the Pacific Northwest and established massive component and final assembly operations in the Gastonia, Mount Holly, and Cleveland areas of North Carolina. Gastonia’s location on the I-85 interstate corridor, combined with its historical industrial base and proximity to robust steel, aluminum, and metallurgical supply chains in the Piedmont region, provided an optimal logistical environment for heavy-duty vehicle manufacturing.

Freightliner’s Gastonia-area engineering operations are currently engaged in pioneering autonomous commercial trucking technology. A premier example of this R&D is the development of the Level 4 autonomous, battery-electric Freightliner Cascadia technology demonstrator, engineered in direct partnership with Torc Robotics. The integration of redundant braking mechanisms, secondary steering racks, low-voltage power networks, and advanced sensor pods into a Class 8 commercial chassis clearly satisfies the federal R&D tax credit requirement for a permitted purpose, relying entirely on the hard sciences of electrical engineering, physics, and computer science. During the development phase, Daimler engineers face immense technical uncertainty regarding how secondary fail-safe systems will actuate if a primary compute module fails while hauling a maximum payload at highway speeds.

The resolution of this uncertainty requires a massive, resource-intensive process of experimentation. Long before a physical chassis is assembled in Gastonia, the engineering team designs and builds digital mock-ups and digital twins of every truck model. Under the strict interpretation of the federal tax code, the costs associated with building a physical pilot model are only considered Qualified Research Expenditures (QREs) if the model is expressly used to evaluate technical alternatives and resolve uncertainty. Freightliner achieves this by systematically testing the Cascadia’s redundant systems through iterative software-in-the-loop and hardware-in-the-loop simulations, followed by closed-track physical testing of the sensor suites. Furthermore, the development of the intelligent powertrain management software—which utilizes pre-loaded terrain maps and GPS to autonomously adjust transmission and engine functions via “eCoast” and creep mode technologies—qualifies explicitly under the newly enacted One Big Beautiful Bill Act (OBBBA) of 2025, which permanently classifies software development costs as research and experimentation costs eligible for immediate federal deduction.

Case Study: Advanced Materials, Specialty Chemicals, and High-Performance Polymers (LANXESS and RadiciGroup)

As the North American automotive industry relentlessly pursued greater fuel efficiency through vehicle lightweighting, a significant cluster of specialty chemical and plastics compounding firms established operations in Gaston County to serve localized automotive OEMs. Two prominent examples operating in Gastonia are LANXESS, a Germany-based specialty chemicals company, and RadiciGroup, an Italian multinational corporation. RadiciGroup’s historical trajectory is particularly illustrative of industrial evolution; beginning in 1941 when Pietro Radici sold blankets from a horse-drawn gig in Italy, the company engaged in horizontal diversification into synthetic fibers, and ultimately vertical integration into industrial chemicals and engineering plastics. Recognizing the strategic value of the North American market, RadiciGroup expanded its High Performance Polymers business area by acquiring the engineering polymer division of Resinas TB and establishing advanced operations in the Gastonia region. Concurrently, LANXESS constructed a highly advanced, 20,000-metric-tons-per-year compounding plant in Gastonia utilizing a fast-tracked Engineer-Procure-Construct (EPC) methodology, successfully designing and building the 42,000-square-foot high-tech extrusion facility in a mere eleven months.

Both LANXESS and RadiciGroup engage in formulating custom thermoplastic engineering polymers, such as polyamides (PA6, PA6.6), polyphthalamide (PPA), and polyphenylene sulfide (PPS), which are tailored for extreme thermal, chemical, and mechanical environments within engine bays, electrical systems, and railway infrastructure. The creation of these new, specialized formulations—such as RadiciGroup’s flame-retardant Radiflam or high-tensile-strength Radilon lines—is deeply rooted in organic chemistry and polymer science, satisfying the federal R&D tax credit’s requirement that the research be technological in nature.

Chemical engineers in Gastonia face continuous technical uncertainty regarding how various proprietary flame-retardant additives, ultraviolet stabilizers, or glass-fiber reinforcements will alter the melt-flow index, tensile strength, and impact resistance of the base polymer during high-pressure injection molding. To qualify for federal tax incentives, these companies must document a rigorous process of experimentation. Extrusion engineers perform systematic batch testing by formulating varying chemical recipes, extruding pilot batches through small-scale twin-screw extruders, and subjecting the resulting compounds to standardized ASTM stress, thermal degradation, and flammability tests. If a specific batch fails to meet the thermal degradation threshold required by an automotive OEM, the chemical matrix is recalibrated, the additives are adjusted, and the material is retested. This iterative chemical formulation loop is the quintessential example of the scientific method demanded by the IRS to claim R&D tax credits. While North Carolina no longer offers an income tax credit for these activities, NAICS 54171 life science and physical science R&D companies benefit directly from the state’s explicit sales and use tax exemption on R&D equipment. The procurement of highly specialized spectrophotometers, rheometers, and pilot-scale extrusion machinery used within the Gastonia laboratories of both LANXESS and RadiciGroup are exempt from state sales tax, thereby preserving crucial working capital for continued metallurgical and chemical research.

Case Study: Motion Control Systems and Electromechanical Engineering (Stabilus)

Stabilus, globally recognized as a premier provider of motion control systems, established its manufacturing and engineering presence in Gastonia as part of a broader macro-strategy to localize complex production near domestic North American automotive assembly hubs. Founded in Koblenz, Germany, in 1934 as a manufacturer of retrofitting stabilizers for the American automotive industry, the company achieved a historic milestone in 1962 by pioneering the world’s first series production of gas springs. Gastonia offered Stabilus the highly skilled precision machining labor force—a direct legacy of the city’s historic textile machinery maintenance and tooling sector—required to accurately manufacture complex electromechanical drives and hydraulic dampers. Today, the Gastonia facility operates as a critical node within a global network of 8,000 employees generating over 1.3 billion euros in annual revenue.

Stabilus engineers are continuously engaged in the custom design of gas springs, dampers, and electromechanical systems intended to optimize the kinematics of opening, lifting, lowering, and adjusting vehicle liftgates, solar panel arrays, and heavy agricultural machinery. The design of customized damping valving to protect against specific oscillation and vibration frequencies is an improvement in component functionality that relies entirely on mechanical engineering, fluid dynamics, and physics. When an automotive OEM contracts Stabilus to design a motorized strut for a new, significantly heavier electric vehicle tailgate, the Gastonia engineering team faces immediate technical uncertainty regarding the required internal gas pressures, the kinetic friction coefficients of the pneumatic seal materials under temperature extremes, and the precise damping valving required to ensure smooth, uniform kinematic motion without stressing the vehicle’s mounting points.

The process of experimentation required by the federal R&D tax credit is highly visible in this environment. Stabilus engineers utilize advanced Computer-Aided Design (CAD) software to model kinematic force vectors, followed by the CNC (Computer Numerical Control) machining of prototype piston and valving systems. These physical prototypes are subsequently subjected to severe cyclic endurance testing in environmental chambers—simulating extreme atmospheric heat, deep cold, and high humidity—to ensure absolute seal integrity over 100,000 continuous operational cycles. To ensure these activities remain eligible for the IRC Section 41 credit, Stabilus must carefully navigate the federal “Funded Research” exception. Under federal guidelines, research is considered funded, and thereby ineligible for the tax credit, if the client’s payment is not strictly contingent on the success of the research, or if the taxpayer fails to retain substantial rights to the intellectual property. Therefore, Stabilus must ensure its development contracts with automotive OEMs do not guarantee success or pass the financial risk to the OEM during the prototyping phase; if Stabilus assumes the financial risk of the engineering hours and retains the rights to the internal valving patents, the wages of the Gastonia engineering staff are fully qualified research expenditures.

Case Study: Lithium Extraction, Metallurgical Innovation, and Chemical Processing (Piedmont Lithium)

The development of Piedmont Lithium’s operations in Gastonia represents a profound intersection of ancient geology and modern clean-energy demands. The region sits directly atop the Carolina Tin-Spodumene Belt, a massive geological formation created hundreds of millions of years ago by tectonic plate collisions that formed the Appalachian Mountains. The modern lithium industry actually originated in this specific region of North Carolina in the 1950s, initially driven by the United States Atomic Energy Commission’s demand for components utilized in nuclear weapons. Legacy companies like Albemarle led the extraction efforts before global lithium production shifted almost entirely to accessible brine deposits in Australia and South America, leaving the United States with merely one percent of global mining and processing capacity by 2021. However, driven by the exponential rise in demand for electric vehicle batteries, Piedmont Lithium was founded in 2016 by financier Taso Arima and geologist Lamont Leatherman to re-establish a localized, vertically integrated lithium supply chain utilizing the historic spodumene rock reserves of Gaston County. Following strategic realignments, the company consolidated its planned Tennessee processing capacity into the Carolina Lithium project, a proposed 1,548-acre tract in Gaston County designed to produce 60,000 metric tons of battery-grade lithium hydroxide annually.

The transition from traditional, highly destructive hard-rock mining to a highly sustainable, low-carbon extraction and chemical conversion process requires extensive, heavily capitalized R&D. The development of novel metallurgical and chemical processing flowsheets intended to convert raw spodumene concentrate directly into lithium hydroxide on-site is a permitted purpose that relies on chemistry, metallurgy, and mechanical engineering. At the project’s inception, Piedmont’s metallurgical engineers faced immense technical uncertainty regarding the optimal temperature profiles required for the calcination of spodumene (the phase change from alpha-spodumene to beta-spodumene), the exact chemical leaching ratios required to extract the lithium, and the precise dense medium separation parameters necessary to eliminate naturally occurring impurities such as quartz, feldspar, and mica.

Before committing to the construction of a proposed $1.2 billion commercial facility, the company must execute rigorous pilot-scale testing and a Bankable Feasibility Study. This involves running continuous metallurgical testwork, systematically varying reagent concentrations and thermal roaster temperatures to empirically determine the parameters that maximize lithium recovery rates. The continuous chemical analysis of the resulting slurry, and the subsequent iterative adjustment of the hydrometallurgical flowsheet, represents a textbook process of experimentation. Furthermore, R&D focused on integrating grid-sourced renewables and large-scale solar arrays to sharply curb the carbon intensity of the extraction process requires novel engineering experimentation in power load balancing and micro-grid management. At the state level, the heavy machinery required for dense medium separation, the massive concentrate thickeners, and the chemical reactors for the hydroxide conversion plant represent extraordinary capital expenditures. In the absence of a North Carolina state income tax credit for R&D, Piedmont Lithium must actively leverage the North Carolina Department of Revenue’s (NCDOR) sales and use tax exemptions for manufacturing mill machinery and pollution control equipment. Properly applying these exemptions will save the enterprise millions of dollars in upfront capital tax burdens during the construction phase of the Gaston County concentrator and chemical plant.

The United States Federal Research and Development Tax Credit Framework

The United States federal government incentivizes domestic technological innovation primarily through two distinct but deeply interrelated statutory mechanisms: the research tax credit under Internal Revenue Code (IRC) Section 41, and the deduction of research and experimental (R&E) expenditures under IRC Section 174. These provisions are architected to partially offset the high operational costs and inherent financial risks associated with developing unproven products, processes, software, techniques, formulas, or inventions within the United States.

Statutory Foundations: IRC Section 41 and the Four-Part Test

To qualify for the federal R&D tax credit under IRC Section 41, expenditures must be definitively incurred in the pursuit of “qualified research.” The Internal Revenue Service (IRS) and the United States Treasury mandate that all claimed research activities strictly and demonstrably satisfy a cumulative four-part test. Crucially, this test must be applied separately to each specific business component being developed by the taxpayer; it cannot be applied broadly to a company’s general operations. Failure to substantiate any single criterion automatically disqualifies the specific activity from the tax credit.

The burden of proof rests entirely on the taxpayer to substantiate that these four criteria are met. The IRS demands contemporaneous documentation—including dated design iterations, rigorous test logs, CAD files, and technical engineering notes—to validate the claims. The financial value of the credit is derived from Qualified Research Expenditures (QREs), which typically comprise taxable W-2 wages for employees directly performing, directly supervising, or directly supporting the research; the cost of tangible supplies consumed or destroyed during the testing process; and a statutory percentage (usually 65%) of contract research expenses paid to third-party entities performing qualified research on the taxpayer’s behalf.

IRC Section 174: Capitalization, Amortization, and the One Big Beautiful Bill Act of 2025

While Section 41 provides a dollar-for-dollar reduction in tax liability, IRC Section 174 governs how the underlying R&E expenditures are treated for taxable income deduction purposes. Historically, since its enactment in 1954, Section 174 allowed businesses to immediately deduct all reasonable domestic R&E expenses in the tax year they were incurred, providing massive and immediate cash flow benefits to innovative firms. However, the Tax Cuts and Jobs Act (TCJA) of 2017 radically altered this landscape. The TCJA temporarily mandated that, for tax years beginning after December 31, 2021, all domestic R&E costs must be capitalized and amortized over a five-year period (and fifteen years for foreign research), severely impacting corporate liquidity and complicating tax compliance.

This punitive amortization requirement was ultimately reversed by the passage of the One Big Beautiful Bill Act (OBBBA) in 2025. The OBBBA introduced IRC Section 174A, which permanently restored the immediate expensing of domestic R&E expenditures for tax years beginning after December 31, 2024. The OBBBA also introduced complex but highly favorable retroactive provisions. Small business taxpayers—defined under Section 448(c) as having average annual gross receipts of $31 million or less over the prior three tax years—are granted a special election to apply the immediate expensing rule retroactively to taxable years beginning after December 31, 2021. To capture this benefit, small businesses must file amended returns for the 2022 through 2024 tax years by no later than July 4, 2026. Larger entities that exceed the $31 million gross receipts threshold are not permitted to amend prior returns; however, they are provided the flexibility to accelerate their remaining unamortized R&D deductions over a one-year or two-year period beginning in 2025, or they may choose to continue the existing amortization schedule. This legislative overhaul significantly enhances the present financial value of domestic research investments and dramatically amplifies the utility of the companion Section 41 credit for Gastonia-based manufacturers. Furthermore, the new Section 174A permanently affirms that all software development costs continue to be explicitly classified as R&E costs eligible for these provisions.

State-Level Tax Administration: North Carolina R&D Incentives and Conformity

While the federal landscape has recently stabilized with highly favorable expensing rules, the state-level tax environment in North Carolina presents a complex matrix of expired income tax credits, statutory non-conformity, and critical alternative sales tax exemptions that Gastonia manufacturers must carefully navigate.

The Historical Application and Expiration of Article 3F

Historically, the State of North Carolina offered a highly competitive, tiered state-level R&D income tax credit under Article 3F of the North Carolina General Statutes (N.C.G.S. § 105-129.55). Administered by the North Carolina Department of Revenue (NCDOR), eligible businesses claimed the credit by filing Form NC-478I, which functioned as an incentive for qualified North Carolina research and development expenses. The statutory definitions of qualified research under Article 3F strictly mirrored the federal definitions found in IRC Section 41, ensuring a unified standard for the four-part test.

The structural mechanics of the Article 3F credit were highly advantageous, particularly for small businesses and collaborative university research, offering distinct categorization tiers. The credit was not taken in installments but was required to be taken in the year the expenses were incurred, carrying a robust fifteen-year carryforward provision for any unused portions.

Despite its efficacy in spurring industrial innovation across the Piedmont region, the North Carolina Article 3F R&D tax credit was permitted to expire on December 31, 2015. Subsequent legislative efforts to revive the incentive, most notably Senate Bill 354 which proposed to reenact and modify the credit, remained stalled in committee and were not enacted for the 2025 or 2026 tax years. Consequently, there is currently no specific R&D income tax credit available at the state level in North Carolina. Gastonia companies must rely entirely on the federal Section 41 credit to reduce their federal income tax liability, which ultimately serves as the mathematical starting point for calculating state corporate income tax.

Tax Year 2025 Conformity Complexities and the OBBBA

The expiration of Article 3F is compounded by significant immediate conformity issues regarding the federal tax code. The NCDOR calculates North Carolina state taxable income utilizing federal adjusted gross income (AGI) for individuals, and federal taxable income (FTI) for corporations, as the mandatory baseline. However, unlike states with “rolling conformity,” North Carolina does not automatically adopt updates to the federal Internal Revenue Code. The North Carolina General Assembly must affirmatively enact conformity legislation. As detailed in official notices issued by the NCDOR Tax Administration in January 2026, the North Carolina Revenue Act formally references the IRC strictly as it existed on January 1, 2023.

This static conformity date creates a massive compliance hurdle for Gastonia-based manufacturers regarding the federal OBBBA of 2025. Because the state legislature has not yet reconvened to enact conformity legislation adopting the OBBBA changes, taxpayers cannot legally utilize the highly favorable Section 174A full expensing provisions on their 2025 North Carolina state income tax returns. The NCDOR and leading regional CPA firms advise affected taxpayers to choose between two unappealing options for the 2025 filing season: either file an extension (noting that an extension to file does not grant an extension to pay estimated taxes) and wait for the General Assembly to pass conformity legislation in late 2026, or file the current return using a complex recalculated FTI that manually adds back the accelerated Section 174A deductions, which will almost certainly necessitate filing an amended state return once conformity is eventually achieved.

Alternative Incentive Frameworks: Sales and Use Tax Exemptions for Manufacturing and R&D

While direct income tax credits for R&D have evaporated at the state level, North Carolina continues to foster heavy manufacturing and scientific research through highly targeted indirect tax mechanisms, predominantly sales and use tax exemptions. For capital-intensive industries in Gastonia, avoiding state sales tax on multi-million dollar equipment purchases provides an immediate, tangible reduction in upfront R&D and production scaling costs.

NCDOR statutory guidelines stipulate two primary pathways for exemption relevant to innovation. First, under the Research and Development Activities exemption, sales of equipment, or any attachment or repair part for equipment, sold to companies primarily engaged in R&D activities in the physical, engineering, and life sciences (explicitly classified under NAICS code 54171) are completely exempt from state sales and use tax. This is highly utilized by the laboratory operations of chemical firms like LANXESS and RadiciGroup. Second, the broad “mill machinery” exemption encompasses virtually all specialized manufacturing machinery, parts, accessories, and specialized equipment for loading or processing utilized by manufacturing industries and plants. This exemption—which effectively replaced the repealed Article 5F Certain Machinery and Equipment Tax privilege tax system in 2018—ensures that as Gastonia manufacturers transition successful pilot models into full commercial production lines, the requisite capital expenditure is not burdened by state sales taxes.

Federal and State Jurisprudence: Landmark Tax Court Decisions

The IRS routinely subjects R&D tax credit claims to intense, exhaustive audits, heavily scrutinizing the taxpayer’s operational definition of qualified activities and the sufficiency of their contemporaneous documentation. Recent federal and state case law has established extremely stringent precedents that manufacturers and engineering firms operating in jurisdictions like Gastonia must strictly adhere to.

Strict Adherence to the Process of Experimentation: Little Sandy Coal Co. v. Commissioner

The U.S. Court of Appeals for the Seventh Circuit’s landmark 2023 decision in Little Sandy Coal Co., Inc. v. Commissioner fundamentally reinforced the IRS’s aggressive and strict interpretation of the “process of experimentation” requirement under Section 41(d)(1)(C). The taxpayer, Little Sandy Coal, constructed a novel prototype dry dock (a pilot model) and attempted to claim the associated massive construction expenses as QREs. The IRS denied the credits, arguing the company lacked sufficient evidence, and the appellate court ultimately upheld the denial. The court ruled that the taxpayer completely failed to prove that “substantially all” (at least 80%) of its research activities followed a structured, scientific process of experimentation designed to resolve true uncertainty.

The Little Sandy Coal ruling established several critical legal precedents. First, the court ruled that simply manufacturing a novel product, building a physical pilot model, or utilizing general, highly skilled engineering intuition does not automatically constitute a process of experimentation. There must be a documented, methodical process to test hypotheses and evaluate alternatives. Second, the court explicitly rejected the taxpayer’s “novelty approach,” ruling that the substantially all test cannot be evaluated based on the physical elements or sheer uniqueness of the final project; it must be applied strictly in reference to the specific activities undertaken by the employees. Furthermore, the court warned that if a taxpayer cannot prove that 80% of the activities at the overarching business component level constitute a process of experimentation, they must be prepared to apply the “shrink-back” rule and document the experimental process at the subcomponent level, which Little Sandy Coal failed to do. However, the appellate ruling did provide one major taxpayer-favorable precedent: the court rejected the lower tax court’s flawed fractional math, clarifying that costs associated with the direct support and direct supervision of research activities qualify for inclusion in both the numerator and the denominator of the 80% calculation, provided they are deductible under Section 174.

The Necessity of Scientific Methodology: Siemer Milling Co. v. Commissioner

The vital importance of rigorous documentation was previously highlighted in the 2019 United States Tax Court decision, Siemer Milling Company v. Commissioner. Siemer Milling, a wheat flour production company, claimed significant R&D credits across seven projects for new product development, including flour heat treatments and whole wheat hybrids. The credit claims included the wages of employees with titles such as miller, maintenance personnel, lab technicians, and the R&D manager. The Tax Court disallowed 100% of the credits, agreeing with the IRS that the company completely lacked evidence that it “formulated or tested hypotheses or engaged in modeling, simulation, or systematic trial and error”. The court noted a stark absence of data regarding the analysis of test data or the refinement of hypotheses. While the court completely denied the tax credits for failing the four-part test, it notably granted the taxpayer relief from accuracy-related IRS penalties, ruling that Siemer Milling acted reasonably and in good faith by relying heavily on the advice of experienced external accountants.

The Funded Research Exception: Phoenix Design Group and Smith v. Commissioner

Federal courts also rigorously police the “funded research” exception, which frequently entangles custom engineering and contract manufacturing firms. In the related cases of Smith v. Commissioner and Phoenix Design Group, Inc. v. Commissioner, the IRS successfully invoked IRC Section 41(d)(4)(H) to disallow credits for architectural and engineering firms where the research was deemed funded by a third-party client. Under the law, research is statutorily considered “funded” (and therefore entirely ineligible for the credit) if the taxpayer’s contract payment is not strictly contingent upon the success of the research, or if the taxpayer does not retain substantial rights to the resulting intellectual property. Firms in Gastonia engaging in contract manufacturing or custom component design must ensure their commercial contracts are structured so that the financial risk of technical failure rests squarely on their own balance sheets, rather than utilizing standard time-and-materials contracts that guarantee payment regardless of the R&D outcome.

State Statutory Independence: McCabe v. North Carolina Department of Revenue

At the state level, the NCDOR maintains an administrative review process for contested tax cases, ultimately heard before the Office of Administrative Hearings or the state judiciary. North Carolina tribunals have demonstrated a willingness to strictly interpret state tax statutes independently of federal tax law when statutory language diverges. In a highly notable 2023 decision, McCabe v. N.C. Dep’t of Revenue (2023 NCBC 28), the North Carolina Business Court adjudicated a complex dispute over state renewable energy tax credits. The NCDOR attempted to disallow the taxpayer’s credits by relying on federal tax law as controlling authority. Judge Conrad explicitly rejected this argument, ruling that the NCDOR is prohibited from importing federal tax law into state law through its audits and litigation positions when the state statute does not explicitly reference the federal code. This forceful restatement underscores the principle that, while North Carolina historically modeled its Article 3F R&D definitions on federal IRC Section 41, state-specific tax provisions and limitations must be independently analyzed and litigated strictly under the North Carolina General Statutes.

Strategic Tax Planning Directives for Gastonia Enterprises

The profound transition of the North Carolina economic landscape—and specifically Gastonia’s evolution from traditional textile manufacturing to advanced materials, autonomous automotive components, motion control systems, and energy transition minerals—illustrates a regional economy that is now heavily dependent on continuous, capital-intensive technological innovation.

Because the State of North Carolina has permitted its localized Article 3F R&D tax credit to expire, the financial mechanisms supporting this industrial innovation have shifted entirely to federal income tax credits and state-level indirect sales tax exemptions. Corporate tax teams, controllers, and engineering directors operating within Gastonia must adopt a highly coordinated, multi-faceted approach to optimize their R&D investments and maintain tax compliance:

• Enforce Strict Federal Substantiation Protocols: Following the devastating judicial rulings in Little Sandy Coal and Siemer Milling, manufacturers must completely abandon estimations and implement real-time, project-based time-tracking systems for all engineering and technical staff. Engineering notes, CAD design iterations, dynamic test results, and failure analyses must be explicitly and contemporaneously linked to specific technological uncertainties to satisfy the IRS’s rigorous 80% “substantially all” requirement for the process of experimentation.
• Aggressively Leverage Section 174A Restorations: The One Big Beautiful Bill Act of 2025 provides massive, unprecedented cash flow opportunities through the permanent restoration of immediate expensing for domestic R&E costs. Small-to-medium enterprises in Gastonia must urgently evaluate whether amending their 2022-2024 federal returns to claim retroactive deductions is mathematically advantageous, while larger corporations must strategically model the acceleration of their previously amortized costs over the 2025 and 2026 tax years to maximize liquidity.
• Navigate North Carolina Statutory Non-Conformity: Until the North Carolina General Assembly passes updated conformity legislation aligning the state revenue code with the federal OBBBA, tax preparers must operate defensively. Firms must be prepared to file strategic extensions or manage highly complex reconciliation statements on their state corporate income tax returns to accurately account for the temporary disparities in Section 174 treatment between federal and state ledgers.
• Maximize Industrial Sales Tax Exemptions: Capital-intensive industries—such as Piedmont Lithium’s heavy spodumene mining operations and LANXESS’s polymer compounding plants—must ensure that all specialized laboratory equipment, testing apparatuses, and pilot model manufacturing machinery are properly coded at the exact time of purchase. Properly invoking the NCDOR mill machinery and NAICS 54171 R&D equipment sales tax exemptions is critical to shielding upfront capital expenditures from unnecessary state taxation.

The sustained global competitiveness of Gastonia’s localized industries is inextricably linked to their ability to engage in continuous research and development. While the loss of the North Carolina Article 3F R&D tax credit removed a direct state-level income tax incentive, the reinvigoration of federal immediate expensing under IRC Section 174A, combined with the dollar-for-dollar power of the IRC Section 41 tax credit and robust state sales tax exemptions, provides a powerful financial safety net for corporate innovation. However, the federal judiciary’s increasingly stringent interpretation of the “process of experimentation” demands that Gastonia’s engineering and manufacturing firms treat their tax compliance and documentation protocols with the exact same level of precision, rigor, and scientific methodology as their physical product development.

The information in this study is current as of the date of publication, and is provided for information purposes only. Although we do our absolute best in our attempts to avoid errors, we cannot guarantee that errors are not present in this study. Please contact a Swanson Reed member of staff, or seek independent legal advice to further understand how this information applies to your circumstances.