Tax Compliance

The R&D Tax Credit: How US Startups Can Save Thousands

February 18, 2026

What is the R&D Tax Credit?

The Research and Development (R&D) Tax Credit under IRC Section 41 allows businesses to claim a credit for qualified research expenses. Since the PATH Act of 2015, startups can apply up to $250,000 of this credit against payroll taxes — even before they are profitable.

What Qualifies?

You don't need a lab to claim R&D credits. Most software and tech companies qualify. The IRS uses a four-part test:

  • Permitted Purpose: Developing a new or improved product, process, or software
  • Technical Uncertainty: You're solving a technical problem with an uncertain outcome
  • Process of Experimentation: You test, iterate, and evaluate alternatives
  • Technological in Nature: The work relies on engineering, science, or computer science

How Much Can You Claim?

Qualifying startups can offset up to $500,000 in payroll taxes per year ($250,000 for Social Security, $250,000 for Medicare). This is a dollar-for-dollar reduction in your tax bill — not just a deduction.

Common Qualifying Activities

  • Writing and testing software code
  • Developing new algorithms or data models
  • Designing and prototyping new products
  • Cloud architecture and infrastructure development

FinStackk identifies qualifying R&D activities during your annual tax review and files Form 6765 on your behalf to maximise your credit.