The RD Tax Credit
Last Updated on 9/4/2026

The R&D Tax Credit - The Basics

Growing a business often requires investment in new technologies, systems, products, and processes. While this type of innovation can support long-term growth, research and development efforts can be costly and may not produce an immediate return. 

The R&D tax credit was created to encourage businesses to continue investing in innovation across a wide range of industries. In other words, it rewards eligible businesses for the technical work they perform to develop or improve products, processes, software, technologies, and systems. 

What is the R&D Tax Credit?

The Credit for Increasing Research Activities, commonly known as the Research and Development tax credit or Research and Experimentation tax credit, is a federal tax incentive under IRC §41 designed to encourage companies to develop new or improved products, processes, technologies, and systems. 

The credit was first introduced under the Economic Recovery Tax Act of 1981 and made permanent by the Protecting Americans from Tax Hikes (PATH) Act of 2015, effective January 1, 2016. Since then, eligible businesses have been able to use the credit in additional ways. These include offsetting alternative minimum tax liability for certain small businesses and, for certain qualified small startups, reducing payroll taxes. 

In general, the R&D tax credit may apply to businesses with expenses paid or incurred for qualified research activities. To be eligible to reduce payroll taxes, qualified small businesses generally must have less than $5 million in gross receipts for the credit year and no gross receipts before the five-tax-year period ending with that year. Eligible small businesses can elect to apply up to $500,000 of the credit annually against payroll taxes using Form 6765 and Form 8974.  

How to Qualify: The Four-Part Test

KBKG’s Project-Level R&D Qualification Framework applies each requirement to a specific business component, technical uncertainty, experimentation process, and resulting improvement. This keeps the qualification analysis tied to actual projects rather than broad descriptions of innovation. 

Under IRC §41, activities generally must satisfy a four-part test to qualify for the credit: 

  • Permitted Purpose: The activity is intended to create a new or improved business component related to function, performance, reliability, or quality. 
  • Technological in Nature: The activity relies on principles of the physical sciences, biological sciences, engineering, or computer science. 
  • Elimination of Uncertainty: The activity is intended to eliminate uncertainty concerning the development or improvement of a business component. 
  • Process of Experimentation: The activity involves evaluating one or more alternatives through modeling, simulation, systematic trial and error, or other testing. 

How Is the R&D Tax Credit Calculated?

Businesses generally calculate the credit using either the Regular Credit method or the Alternative Simplified Credit (ASC) method described in the Form 6765 instructions. The method used depends on the company’s facts, base period information, and qualified research expenses. 

Commonly Qualifying Industries

Businesses in any sector may qualify, however, common examples include: 

  • Manufacturing 
  • Software development 
  • Aerospace 
  • Pharmaceuticals 
  • Engineering 

Qualification depends on the work performed, not the company’s industry label. A business outside these commonly listed sectors still qualifies when its projects and expenses meet the Section 41 requirements. 

What Are the Benefits of the R&D Tax Credit?

The R&D tax credit can help businesses offset the cost of developing or improving systems, products, processes, and technologies. Even with changes requiring certain research and development costs to be amortized, the credit may still provide meaningful tax and cash-flow benefits. Unlike a tax deduction, the R&D tax credit reduces tax liability dollar for dollar. For eligible businesses, that keeps more cash available for hiring, product development, equipment, and other growth priorities. 

Potential benefits may include: 

  • The ability to retain more business profits 
  • Lower federal and state tax liabilities in current or future years 
  • Improved cash flow and potential increases in company value 

For many small and midsized businesses, these benefits can create additional working capital that may be especially helpful during early growth stages. 

What Documents Do You Need To Claim the R&D Tax Credit?

The IRS does not provide a required document list for claiming the R&D tax credit, the rules state adequate books and records. Because the taxpayer has the burden of proof, companies should maintain detailed records that support both the qualifying activities and related expenses. The IRS has continued to emphasize documentation and substantiation for research credit claims, and IRS Large Business and International Directive LB&I-04-0118-005 provides guidance on evaluating those claims. 

Helpful documentation may include: 

  • Payroll records for employees performing, supporting, or supervising R&D activities 
  • Invoices and contracts for third-party contractors performing research on behalf of the business 
  • Testing records, design drawings, blueprints, progress reports, and other project documentation 
  • General ledger reports showing expenses connected to research and development 
  • Timekeeping records, meeting notes, work plans, and related support showing participation in qualified research activities 

Based on KBKG’s experience working with thousands of companies, the strongest R&D tax credit files tell one consistent story. They show what the business attempted to develop or improve, what technical uncertainty existed, how alternatives were evaluated, who performed the work, and how the claimed expenses were calculated. 

Why Choose KBKG?

KBKG, the top-rated R&D provider, helps businesses identify qualifying research activities, calculate qualified research expenses, compare available credit methods, prepare Form 6765, and build the technical and financial documentation behind the claim. 

KBKG brings former Big Four claim specialists and former IRS research-credit examiners under one roof. That combined experience helps businesses evaluate both the available credit and the documentation needed to support it. 

KBKG also offers free R&D tax credit calculators that give businesses an initial estimate of potential federal or payroll tax benefits before beginning a full analysis. 

Companies interested in exploring the R&D tax credit can contact KBKG or request a free, no-obligation consultation to determine whether they qualify. 

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