What Happens to R&D Credits in a Tax Audit?
TL;DR
The IRS does not examine your R&D credit as one number. It goes project by project, asking four things about each. The paperwork you skip at filing is the paperwork you produce in an exam.
Key Takeaways
- Examiners test each business component against the four-part test. One weak project does not sink the good ones.
- The IRS waived two of the five refund-claim items in June 2024, then said it can still demand them in an exam.
- The 45-day fix window for a deficient refund claim closes January 10, 2027. Form 6765 Section G is mandatory after 2025.
What does an R&D credit audit actually examine?
Projects, not the company.
The credit lives at a business component: the product, process, software, formula, or invention you were building. For each one an examiner asks four things. Did the work aim at better function, performance, reliability, or quality? Was it technological? Did it chase real uncertainty? Did you test alternatives?
All four, every component. Which is why a credit figured as a flat percentage of engineering payroll falls apart under questioning.
Does the IRS still want the documentation it waived?
Yes.
In June 2024 the IRS waived two of the five items required on refund claims: who performed each activity, and what each sought to discover. Three still go in: your business components, the activities for each, and your wage, supply, and contract research expenses.
The same page says the waived information "may be requested if a refund claim involving the Research Credit is selected for examination." Filing got easier. Proving the credit did not.
What changes on your next return?
Section G of Form 6765 stops being optional for tax years beginning after 2025. Carve-outs cover qualified small businesses taking the payroll offset and taxpayers under $1.5 million in qualified research expenses and $50 million in gross receipts.
It asks for your business components and a wage split across direct research, supervision, and support, which is the outline an examiner used to request.
So build the record while the work happens. Nobody remembers in year three which alternatives got tested and why.
Frequently Asked Questions
Does an R&D credit audit mean I did something wrong?
No. Selection is not an accusation. The credit is technical and heavily claimed, which draws attention on its own. What matters is whether you can show your work.
Can I assemble the documentation after the IRS asks?
You can, and it will be worth less. Records made during the research show what your people tried before anyone knew the answer.
What if my refund claim is missing required information?
Through January 10, 2027, the IRS names what is missing and gives you 45 days to fix it. Miss that and the claim can be rejected, with no route to Appeals.
Let's look at your situation
The question is not whether you would survive an audit. It is whether your file answers what an examiner would ask.
I offer a no-cost analysis, delivered through CSSI. No obligation, no pitch, nothing to gather ahead of time. If a study will not pay for itself, I will tell you that.
Grab a time at calendly.com/david-wiener/cs, or call 720-224-8504 and press option two.
Sources
- IRS, Research credit claims (Section 41) on amended returns frequently asked questions. Page last reviewed March 26, 2026. irs.gov
- IRS, Instructions for Form 6765 (Rev. December 2025). irs.gov/pub/irs-pdf/i6765.pdf
- Internal Revenue Code section 41(d), four-part test.
This article is educational and is not tax advice. Your situation needs a professional who can look at your actual returns.
CEO, Tax Strategist, Speaker, Educator
David “Mr. Cash Flow” Wiener is a nationally recognized authority on real estate tax strategy and cash flow optimization, and the host of The Tax Strategy Playbook podcast. As Founder and CEO of Cash Flow Strategies, Inc., David has spent decades helping real estate investors, business owners, and their advisory teams legally reduce taxes, unlock hidden cash flow, and put more money back into productive assets instead of into the IRS.
Over the course of his career, David has become especially known for his work with cost segregation, 179D energy-efficient commercial building deductions, and other engineering-based tax incentives that accelerate depreciation and free up capital. He has also built a long track record in cash flow and accounts receivable optimization, helping clients improve profitability and financial stability without simply “working harder” or taking on more risk.
David is a sought‑after speaker, trainer, and educator, with audiences ranging from national industry conferences to small mastermind groups and professional associations. He is known for his clear, practical teaching style and his ability to translate complex tax concepts into simple, actionable plays that investors and advisors can use right away. Whether he is speaking to CPAs, medical and dental practice owners, or real estate investors, David’s message is consistent: tax strategy is one of the most powerful—and most overlooked—wealth multipliers available.
On The Tax Strategy Playbook, David brings that same real‑world experience and teaching approach to the microphone. Each epis… Read More
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