The Ultimate Guide to the Federal R&D Tax Credit (2026 Edition)

Table of Contents

• • Introduction
  • Who Qualifies for the R&D Tax Credit?
  • The Four-Part Test for R&D Eligibility
  • What Expenses Qualify (Qualified Research Expenses – QREs)?
  • What Activities Qualify for the R&D Tax Credit?
  • How the R&D Tax Credit is Calculated?
  • Section 174 Capitalization Rules and Their Impact
  • Documentation Requirements & Audit Readiness

Introduction

The Research & Development (R&D) tax credit is a federal incentive that allows companies to generate dollar-for-dollar tax savings for performing eligible activities. The potential savings can be significant (up to 13% of qualified research expenses) and provides needed funding to hire new employees, increase R&D activities, or to expand various facilities. To determine eligibility the IRS has published a four-part test that R&D projects must pass to qualify. Many states offer a similar incentive for R&D activities performed in their state that follow the federal rules.

The credit is extremely valuable for businesses that engage in research and innovation. Many hold the misconception the credit is only beneficial to businesses with large research laboratories such as pharmaceutical or technology companies, but this is not the case. The reality is that many companies including manufacturing, contractors and others, can qualify for everyday business activities. Eligible activities may include product design, process improvement or even software development. If your team is solving technical problems or trying to do something more efficiently, there’s a good chance those activities could count.

From the financial viewpoint, the benefits can be quite attractive. The R&D credit can reduce federal tax liability, free up cash, and provide the capital needed to reinvest in hiring, new equipment purchases, or additional development efforts. It most cases, it’s less about capturing a one-time savings opportunity and more about creating extra space in the budget to fund future activities.

What is the federal R&D Tax Credit?

It is a federal tax incentive designed to reward businesses for investing in innovation including developing new products, improving existing processes, or creating proprietary software. The purpose is to encourage companies to take on challenges and ensure innovation activities are conducted domestically. It was first introduced in 1981 as a temporary measure but became permanent with the passage of the Protecting Americans from Tax Hikes Act of 2015, providing additional certainty when planning long-term R&D investments.

The IRS plays a significant role in the administration and enforcement of the credit. The agency is responsible for establishing the rules for how the credit is calculated, documented, and claimed. As part of this process, guidance is often issued, including Treasury Regulations, that provide clear explanations about what qualifies as research, eligible expenses, and how taxpayers can substantiate a position when making a claim.

The agency is also tasked with enforcing compliance through examinations. While any submission can be subjected to an examination, typically focus is centered on larger claims or amended returns. During an audit, the agency will evaluate several criteria to ensure the company meets the four-part test, expenses are properly calculated, and the appropriateness of documentation. In recent years, the IRS has sharply increased scrutiny of claim completeness when filed. Taxpayers are required to provide more detailed disclosures to process claims specifically for amended returns. The purpose of the change is to reduce the time needed for a potential review.

The credit provides a dollar-for-dollar reduction of federal income tax liability, which means it’s more valuable than a deduction because instead of lowering income taxes, it directly reduces the amount owed. In cases where the credit amount exceeds current year’s liability, taxpayers can either carryback or carryforward the amount to realize savings in a different tax year. In the case of startup companies that typically have little tax liability, they are allowed to apply the credit against payroll taxes.

Difference between federal and state R&D tax credits

Many states, including Utah, offer an R&D tax credit in addition to the federal version which can create an additional dimension of savings. Unlike the federal incentive, many state versions operate under different rules and calculations. While some states closely follow the federal rules, others rely on vastly different criteria which can narrow or expand what type of activities or expenses qualify. Pay careful attention to eligibility criteria, credit rates/calculation methods, refundability and transferability. There may also be differences to the carryback and carryforward period. In Utah, a business may carryforward expenses related to research or payments made to a qualified research organization for 14 years. Businesses interested in claiming both the federal and state credit need to pay careful attention to important differences.

Who Qualifies for the R&D Tax Credit?

Businesses of all sizes and in various industries can qualify to claim the credit. There is a misconception that only large institutions can benefit, but this is simply not the case. Tanner has worked with many startups and early-stage companies that end up qualifying before reaching profitability. This is especially the case if the company is engaged in building new products, developing software, or working through technical challenges which commonly arise when bringing a product to market. These companies overlook the credit because it is mistakenly believed that it can be claimed only when revenue is stable. However, early development is often where the strongest qualifying activities occur.

The credit is also available to small to mid-sized companies especially those that focus on technical problem solving, process improvement, or customization. Whether it’s refining a product line, improving internal systems, or developing more efficient workflows, these companies are frequently sitting on qualifying activities without realizing it.

Established companies typically have more formal R&D functions. However, the opportunity to claim the credit expands into areas of the business which are not traditionally associated with innovation. Engineering teams may be refining product designs or solving performance issues, IT groups may be building or enhancing internal systems to improve efficiency or scalability, and operations personnel may be reworking processes to reduce costs, increase output, or adapt to supply chain constraints. These companies are in a unique position because rather than working on an isolated project, there are often dozens of projects occurring at once. When these activities are properly identified and documented, the R&D tax credit becomes less of a one-time benefit and more of an ongoing component of the company’s tax strategy.

There are a number of industries that are commonly found to be eligible for the credit including manufacturing, software, construction, engineering and agriculture businesses. However, IRS guidance does not outline a specific list of industries that qualify, rather it asserts what matters is compliance with Section 41 qualified research rules. This include the four-part test and the requirement to evaluate the work at the business component level. In other words, companies in a variety of industries can qualify assuming they meet the establish requirements. IN light of this, there are industries that tend to claim the credit more often than others.

• Manufacturing – Companies in this industry most often claim the credit because manufacturers commonly engage in product design, process improvement, prototyping, testing, automation, and tool changes. Even when not operating a formal research function, engineering and production teams may still be performing qualified research when resolving technical uncertainty through experimentation.
• Software/SaaS – These companies also regularly claim the credit because software development can qualify when team are attempting to create new functionality, improve performance, enhance scalability or solve technical design issues. The IRS has issued guidance around software-related research credit issues, including software sold, leased, or otherwise marketed, and more recent audit guidance on software development and the process of experimentation.
• Construction – Companies in this industry may qualify when designing systems, developing new methods, address site specific issues, testing materials, or solving complex technical issues. For most industry companies, it’s the project based technical problem solving that can create qualifying activities. This follows the IRS guidance that it’s not the industry but rather the specific activities which creates eligibility.
• Healthcare/Life Sciences – These companies have the strongest R&D credit opportunities because they are often involved in product development, formulation work, device design, software development and clinical support processes.

The Four-Part Test for R&D Eligibility

To qualify for the credit, a company must show that the project (or business component) meets all requirements necessary to constitute qualified research, which is determined through a four-part test. The components include:

1. Section 174 Test – Eligible R&D credit expenses must be of the type that may be treated as specified research or experimental expenditures under Section 174.  This means the expenditure must be incurred in connection with a company’s trade or business and represent a cost in the experimental or laboratory sense. Expenditures represent research and development costs in the experimental or laboratory sense if they are for activities intended to discover information that would eliminate uncertainty concerning the development or improvement of a product. Uncertainty exists if the information available to the taxpayer does not establish the capability or method for developing or improving the product or the appropriate design of the product. Whether expenditures qualify as research or experimental expenditures depends on the nature of the activity to which the expenditures relate, not the nature of the product or improvement being developed or the level of technological advancement the product or improvement represents. The ultimate success, failure, sale, or use of the product is irrelevant to determining eligibility under section 174.
2. Technological Information Test – In order to satisfy the technological in nature requirement for qualified research, the process of experimentation used to discover information must fundamentally rely on principles of the physical or biological sciences, engineering, or computer science. A taxpayer may employ existing technologies and may rely on existing principles of the physical or biological sciences, engineering, or computer science to satisfy this requirement.
3. Business Component Test—The business must apply the information discovered through the R&D activity to enhance an existing or develop a new business component. A business component is any product, process, technique, invention, or formula that is to be held for sale, lease, license, or used in the taxpayer’s business. A taxpayer must be able to tie the research to a relevant business component.
4. Process of Experimentation Test – To pass this test, a company must demonstrate that substantially all of the research activities (at least 80%) constitute elements of a process of experimentation.  A process of experimentation is defined as a process that evaluates one or more alternatives to achieve a result where the capability of achieving the result is uncertain as of the beginning of the project.

What Expenses Qualify (Qualified Research Expenses – QREs)?

Wages

This category of in-house expenses consists of amounts paid or incurred for wages. The amounts paid to an employee constitute an in-house research expense only to the extent the wages were paid or incurred for “qualified services” performed by the employee. There are three types of qualified services including directly engaging in qualified research, directly supervising qualified research, and directly supporting qualified research.  The IRS provides a clear definition of what activities are eligible for each:

• Directly Engaging in Qualified Research – This refers to the actual conduct of qualified research, as in the case of a scientist conducting laboratory experiments,
• Direct Supervision – This means the immediate supervision of qualified research (for example a scientist that directly supervises lab experiments but does not actually perform them). This does not include supervision by a higher-level manager to whom first ling managers report it. Specific attention should be paid to individuals who do not “directly” supervise qualified research activities (i.e., management levels higher than first line supervisors). In some cases, higher level research managers may perform some qualified research or direct supervision of qualified research due to their technical background and expertise, but this is usually only a minor fraction of their overall work activities.

Supplies

Most supplies used in the experimentation and testing process are eligible, including tangible materials consumed during the research process. These supplies may involve raw materials, prototype components, trial batches, and testing inputs used up or destroyed in the experiment. As an example, a company that produces various prototype iterations in a controlled environment may include such costs as QREs. Capital equipment and depreciable assets do not qualify, but the consumable inputs used in conjunction with them often do.

Contract Research Expenses

Contract research expenses cover payments made to third-party vendors, consultants, or engineering firms that perform qualified research on behalf of the taxpayer. Typically, only a percentage of these costs, often 65 percent under current tax rules, can be included as QREs. To qualify, the taxpayer must retain substantial rights to the research results and bear financial risk if the research fails. This distinction is critical in industries like software development, manufacturing, and aerospace, where outsourced R&D is common but must be carefully structured to meet eligibility requirements.

Cloud Computing Costs

Cloud computing and hosting costs have become increasingly relevant, particularly for software and SaaS companies. Expenses related to cloud infrastructure, data processing, and testing environments may qualify if they are directly tied to the development, testing, or improvement of a product or process. For example, costs associated with running simulations, hosting development environments, or performing large-scale data testing in platforms like Amazon Web Services or Microsoft Azure can be included when they directly support qualified research activities.

It is important to note; allocation methodologies and documentation requirements are essential when substantiating QREs. A taxpayer must use reasonable and consistent methods to allocate costs between qualified and non-qualified activity. This typically means tracking time for employees, relying on project-based accounting or a cost center analysis. Retaining documentation that clearly connects specific research activities, demonstrating how they met both the technical uncertainty and experimentation criteria. Common types of documentation include project notes, design documents, test results, financial records and contracts with third party researchers. Failure to maintain adequate documentation could lead to eligible expenses being disallowed upon IRS review.

What Activities Qualify for the R&D Tax Credit?

Whether an activity qualifies for the R&D tax credit is determined by whether it meets the four-part test. Meaning the work must be technological in nature, intended to create or improve a product or process, involve uncertainty, and rely on a process of experimentation. Within that framework, many common business activities across industries can qualify when they are grounded in technical problem-solving rather than routine execution.

Product development and prototyping is one of the most recognizable qualifying activity categories. This includes designing new products, building and testing prototypes, refining features, and evaluating performance under different conditions. Whether a manufacturer is developing a new component or a consumer products company is iterating on a design, the key factor is the presence of technical uncertainty and structured testing to resolve it.

Software development and system architecture design frequently qualify, particularly when teams are creating new applications, enhancing functionality, or solving complex integration challenges. Activities such as coding new features, designing system architecture, improving performance, or addressing scalability issues can qualify if they require experimentation and technical judgment. This is especially relevant for companies leveraging platforms like Amazon Web Services or Microsoft Azure to build and test new solutions.

Process improvement and automation initiatives can also qualify when they go beyond routine efficiency gains and involve technical innovation. For example, redesigning a manufacturing workflow, developing automated systems to replace manual processes, or implementing new technologies that require testing and iteration may meet the criteria. The distinction lies in whether the work involves evaluating alternatives and resolving uncertainty, rather than simply applying known solutions.

Engineering design and testing is a core qualifying activity across industries such as construction, aerospace, and manufacturing. This includes developing specifications, modeling systems, conducting simulations, and performing validation testing. Activities like stress testing materials, refining structural designs, or optimizing system performance often qualify when they are part of an iterative engineering process.

Custom solutions developed for customers can qualify even though they are client-driven, provided the work involves technical challenges and is not configuration or installation. For example, developing a customized software platform, engineering a unique product variation, or designing a specialized system to meet a client’s requirements can qualify if the solution requires new or improved functionality and a process of experimentation.

How the R&D Tax Credit is Calculated?

The calculation of the federal Research and Development Tax Credit is built around two primary methodologies defined by the Internal Revenue Service: the Regular Credit (RC) Method and the Alternative Simplified Credit (ASC) Method. While both approaches are designed to reward increases in research activity, they differ significantly in how they measure the “base” level of research and the amount of credit generated.

• Regular Credit Method – The Regular Credit Method is the original calculation framework and tends to be more complex. It is based on a fixed-base percentage derived from historical research spending relative to gross receipts during a specified base period, typically 1984 through 1988. That percentage is then applied to current year’s gross receipts to establish a baseline level of expected research activity. The credit is generally equal to 20 percent of qualified research expenses that exceed that base amount. While this method can produce a larger credit in some cases, it requires detailed historical data that many companies either do not have or cannot easily reconstruct.
• Alternative Simplified Credit Method – The Alternative Simplified Credit Method was introduced to address those practical challenges and is now more commonly used. Under ASC, the credit is typically equal to 14 percent of qualified research expenses that exceed 50 percent of the average QREs from the prior three tax years. If a company has no QREs in those prior years, a reduced credit rate may apply to current-year expenses. This method is often more accessible and easier to calculate, especially for growing companies or those without complete historical records.

Key inputs and assumptions play a central role in both methodologies. The most critical input is the accurate identification and calculation of Qualified Research Expenses, including wages, supplies, and contract research. Gross receipts are also a key factor under the Regular Credit Method. Assumptions around cost allocation, employee time tracking, and project qualification directly affect the size and defensibility of the credit. Consistency in methodology from year to year is important, particularly if the company expects to claim the credit on an ongoing basis.

The importance of historical data and base period calculations cannot be overstated. For the Regular Credit Method, reconstructing base period data can be time-intensive but may yield a more favorable result if the fixed-base percentage is low. For the ASC Method, maintaining accurate QRE records over time allows for a more precise rolling average and helps optimize the credit calculation. In both cases, strong documentation supports not only the calculation itself but also the company’s position in the event of an examination.

How the credit amount is calculated depends on which method the company uses when filing for the tax incentive. Both the Regular Credit and the Alternative Simplified Method are designed to reward increases in R&D, but they differ in how baselines are defined and incremental benefits are determined.

The Regular Credit Method is the original framework and relies heavily on historical data. It uses a fixed-base percentage derived from a company’s ratio of research expenses to gross receipts during a historical base period, typically 1984 through 1988. That percentage is applied to current-year gross receipts to establish a base amount of expected research spending. The credit is generally equal to 20 percent of current-year Qualified Research Expenses that exceed that calculated base. While this method can produce a larger credit in certain situations, it is often more difficult to implement because it requires reconstructing older financial data and maintaining consistency in how research expenses are defined across time.

The Alternative Simplified Credit Method is more commonly used today due to its practicality. Under ASC, the credit is typically equal to 14 percent of current-year Qualified Research Expenses that exceed 50 percent of the average QREs from the prior three tax years. If the company has no QREs in one or more of those years, alternative calculation rules apply, often resulting in a reduced but still meaningful credit. This method removes the need for deep historical reconstruction and instead focuses on more recent activity, making it especially useful for growing companies or those that have not historically tracked research expenses in detail.

Key inputs and assumptions drive both methodologies. The most important input is the accurate identification of Qualified Research Expenses, including wages for employees engaged in research, supplies consumed during experimentation, and eligible contract research costs. Gross receipts are also a critical input for the Regular Credit Method. Assumptions around how employee time is allocated, how projects are classified, and how indirect costs are treated can significantly impact the calculation. Consistency and defensibility of these assumptions are essential, particularly in the event of an IRS review.

Historical data and base period calculations play a pivotal role in determining the ultimate credit value. Under the Regular Credit Method, the fixed-base percentage derived from historical data can dramatically influence the outcome, with a lower percentage generally leading to a higher credit. Under ASC, maintaining accurate QRE data over the prior three years allows for a more precise rolling average and helps maximize the incremental benefit. In both cases, incomplete or inconsistent historical data can limit the credit or introduce risk.

Examples help illustrate how these methodologies translate into real value. Consider a company with current year’s QREs of $1,000,000 and prior three-year average QREs of $600,000. Under the ASC Method, the base would be 50 percent of $600,000, or $300,000, resulting in incremental QREs of $700,000. Applying the 14 percent credit rate yields a potential credit of $98,000. Under the Regular Credit Method, if the company’s fixed-base percentage results in a lower base relative to current spending, the credit could be even higher, but only if the company can substantiate the historical data required.

Section 174 Capitalization Rules and Their Impact

Section 174 capitalization rules have become a major planning issue for businesses that invest in research and development. Historically, many companies could deduct research and experimental expenses immediately. Under changes originally made by the Tax Cuts and Jobs Act, specified research or experimental expenditures paid or incurred in tax years beginning after December 31, 2021, generally had to be capitalized and amortized rather than deducted upfront. Domestic research costs were generally amortized over five years, while foreign research costs were amortized over fifteen years. IRS guidance continues to distinguish between domestic and foreign research treatment, with foreign research costs still subject to 15-year amortization for tax years beginning in 2025.

The rules changed again with the addition of Section 174A. IRS instructions for Form 6765 state that Section 174A allows taxpayers to deduct domestic research and experimental expenditures paid or incurred in tax years beginning after December 31, 2024. Taxpayers may also elect to capitalize and amortize domestic research expenses over a period of not less than 60 months. This creates more flexibility for domestic R&D costs, while foreign research expenditures remain subject to capitalization and 15-year amortization.

The interaction between Section 174 and the R&D tax credit is especially important. Section 174 or 174A governs the income tax deduction or capitalization treatment of research costs, while governs the R&D tax credit calculation. A business may have costs that must be analyzed under Section 174 or 174A and may also qualify as Qualified Research Expenses. In practical terms, the deduction timing and the credit benefit are related but separate tax issues. Businesses should evaluate both together because a cost may affect taxable income through amortization or deduction rules while also contributing to the credit calculation. IRS research credit materials continue to reference Section 174 guidance as part of the broader research credit compliance framework.

From a cash flow perspective, capitalization can create a significant short-term tax burden. When R&D costs are capitalized instead of deducted immediately, taxable income may increase in the current year, even if the business is reinvesting heavily in product development, software development, engineering, prototyping, automation or testing. This has been especially challenging for software, manufacturing, life sciences, engineering and technology companies with large payroll and contractor costs tied to research activity. The ability to deduct domestic research expenses under Section 174A for tax years beginning after December 31, 2024, may improve cash flow planning for many companies, but businesses still need to address prior-year unamortized domestic R&D amounts and foreign research costs.

Tax planning should focus on accurate cost classification, project documentation, accounting method changes and modeling the combined impact of deductions, amortization and credits. IRS Revenue Procedure 2025-28 provides procedures related to accounting method changes, including transition rules and treatment of remaining unamortized domestic research expenditures from tax years beginning after December 31, 2021, and before January 1, 2025. The 2025 Form 4562 instructions also note that taxpayers may elect to amortize remaining unamortized domestic research amounts in the first tax year beginning after December 31, 2024 or ratably over a two-tax-year period, subject to the Revenue Procedure’s requirements.

Documentation Requirements & Audit Readiness

Strong documentation is one of the most important parts of a defensible R&D tax credit claim. The IRS expects taxpayers to support both sides of the claim: the activities that meet the Section 41 qualified research requirements and the Qualified Research Expenses connected to those activities. IRS audit guidance specifically notes that contemporaneous books and records should form the basis of an examination, which means documentation created during the research process is generally stronger than summaries prepared after the fact.\

Contemporaneous documentation matters because the R&D tax credit is not based simply on a company being innovative or spending money on technical work. The taxpayer must show that each claimed project involved a permitted purpose, technical uncertainty, technological principles and a process of experimentation. Project-level records help connect the business objective to the technical challenge, the alternatives considered, the testing performed and the outcome of the work. Without this connection, a claim may be vulnerable even when the underlying work appears technical.

Project-level narratives are often the foundation of the documentation file. These narratives should explain what the company was trying to develop or improve, what technical uncertainty existed, what alternatives were evaluated, what testing or modeling occurred and how the project advanced over time. A strong narrative does not need to be overly long, but it should be specific enough to show why the activity qualifies. General statements such as “we improved software performance” or “we developed a new product” are usually less persuasive than records that identify the specific performance goal, design constraint, failure point or engineering challenge involved.

Time tracking and employee interviews are also important because wages are often the largest component of Qualified Research Expenses. Ideally, companies should maintain time records that identify who worked on qualified projects, what role they played and how much of their time related to direct research, supervision or support. When formal time tracking is not available, employee interviews can help reconstruct activity, but interviews are stronger when supported by emails, project management records, design files, engineering logs, sprint tickets or other contemporaneous evidence.

Financial records and cost support should tie the technical documentation to the credit calculation. Payroll records, general ledger detail, contractor invoices, supply purchases, cloud computing costs and project accounting reports can all help substantiate the amount claimed. The key is traceability. A company should be able to show how a cost moved from the accounting system into the R&D credit calculation and why that cost was treated as qualified. For contract research, agreements should also be reviewed to confirm who retained rights to the research and who bore financial risk.

IRS audit trends continue to place greater emphasis on specificity, project-level support and business-component reporting. The IRS Research Credit Claims Audit Techniques Guide provides examiners with guidance for evaluating research credit claims, particularly claims built from prepackaged R&D studies. The IRS has also revised Form 6765 reporting requirements, with the 2025 instructions addressing qualified research expenses, payroll tax credit elections and expanded reporting expectations. For 2025 tax years and beyond, professional commentary on the revised form has noted a shift toward reporting information by business component, which increases the importance of organizing documentation at the project or product level rather than relying only on companywide estimates.

Best practices for defensibility begin with building the documentation process into normal operations. Companies should identify potentially qualifying projects during the year, maintain project files as work progresses and capture technical decision-making as it happens. Useful records may include design documents, test results, prototypes, change logs, meeting notes, engineering calculations, software tickets, version histories and customer specifications. These records should be paired with a consistent methodology for allocating employee time, contractor costs, supplies and other eligible expenses.

A defensible R&D tax credit claim should also include internal review procedures. Tax, finance, engineering, product and operations teams should align on which projects qualify, which costs are included and which assumptions support the calculation. Avoid overreliance on broad estimates, unsupported employee percentages or generic narratives. The strongest claims are those that clearly connect qualified activities, qualified costs and contemporaneous records into a consistent, repeatable methodology.