Most building owners and AEC firms leave the R&D tax credit untouched because they assume it doesn’t apply to them. Labs, white coats, basic research, that’s what R&D means, right?

That assumption is mistaken. And the cost of holding it is significant.

What actually qualifies

The IRS definition of qualifying research is broader than most people realize. It covers any work to develop or improve a product, process, or business component that relies on experimentation and can be tied back to a scientific principle.

In practice, that includes custom design work, proprietary process development, internally built software and tools, and innovations in how you deliver projects. Engineering firms that design custom systems qualify. Developers who are pioneering new construction methods qualify. Companies that have been investing in digital workflows and data infrastructure often qualify.

The question isn’t whether your work is exciting enough to be called research. The question is whether your work involves technical uncertainty and systematic experimentation to resolve it. For most firms doing complex work in the built environment, the answer is yes.

What changed in 2022, and what just changed back

Starting in 2022, Congress changed the rules on how R&D expenses could be deducted. Instead of taking an immediate deduction, companies were required to spread (amortize) those costs over five years for domestic R&D. For firms that had counted on the credit, this was a significant hit, the CFO of one engineering firm described expecting a tax credit and instead receiving a bill for $900,000.

That rule has now been reversed. The R&D credit is back to its pre-2022 structure, with immediate deductions for domestic expenses. More importantly, smaller firms, those under $31 million in gross receipts, can go back and amend their 2022, 2023, and 2024 returns to apply the new rules retroactively.

That means real money flowing back into businesses that have been carrying an unnecessary tax burden for three years.

The clock is running

This isn’t an open window. The ability to amend 2022 returns closes in 2026, depending on your original filing date. Once that happens, those dollars are gone permanently.

For firms that qualify and haven’t acted, this is the kind of thing that looks obvious in hindsight. A short conversation with a specialist to determine eligibility, a few weeks of documentation work, and potentially hundreds of thousands of dollars in refunds or reduced future tax liability.

The firms that will miss this are the ones that assume their accountant would have flagged it. Many accountants, particularly generalists who don’t specialize in R&D credits, aren’t running this analysis proactively. The burden is on you to ask.

For startups: there’s a specific provision worth knowing

If your firm is less than five years old and under $5 million in revenue, there’s a provision that lets you apply the R&D credit against payroll taxes rather than income taxes. If you have no taxable income yet, which is common for early-stage companies, this is one of the few ways to get immediate cash value from the credit, up to $500,000 annually.

For a young company, that’s meaningful capital. And it’s capital that’s already been earned through the work you’re doing.

The simple question to ask

If your firm designs anything custom, has built any internal tools, has invested in process improvement, or does work that involves technical problem-solving, ask a specialist whether you qualify. Not your general accountant. A firm that specifically works on R&D tax credits and understands the built environment.

The conversation takes an hour. The worst case is you find out you don’t qualify. The best case is you recover significant capital that belongs to your business.

The R&D credit was designed to reward firms that invest in building better ways to do things. If that’s your firm, make sure you’re collecting what you’ve earned.