When business owners hear "research and development," they often picture laboratories, scientists, or technology companies developing groundbreaking products. But the federal Research and Development (R&D) Tax Credit can apply much more broadly. Businesses may perform qualified research while developing or improving products, software, manufacturing processes, formulas, techniques, or other business components. The better question isn't simply, "Does my business qualify for the R&D tax credit?" Instead, businesses should ask: "Which of our projects and activities may qualify for the R&D tax credit?"
That's where the R&D tax credit 4-Part Test comes in. Under Internal Revenue Code Section 41, activities generally must satisfy four requirements to constitute qualified research. Understanding these requirements is an important first step when evaluating potential R&D tax credit eligibility.

R&D Tax Credit for Manufacturing Companies: What CPAs Need to Know
Manufacturing clients are among the strongest candidates for the federal R&D tax credit, yet many never claim it. The work that qualifies often looks like everyday operations: engineers refining a product, a production team automating a line, or a quality group testing new materials to cut scrap. For CPAs, that creates an opportunity to deliver real value by recognizing qualifying activity early. This guide covers which manufacturing activities and expenses may qualify, how the Four-Part Test applies, what documentation matters, and the questions that can help uncover R&D opportunities with your clients.

Does My Business Qualify for the R&D Tax Credit? The 4-Part Test Explained
"Does my business qualify for the R&D tax credit?" — this guide breaks down the IRS 4-part test, what counts as a business component, and which expenses qualify.

How CPA Firms Can Add R&D Tax Credit Services Without Adding Risk
As compliance work becomes automated, CPA firms are increasingly looking to the R&D tax credit already sitting in their client base to grow advisory revenue—and while concerns about technical eligibility, documentation, and staffing often hold firms back, offering it in-house doesn't require building a specialty practice from scratch.