A supplier's FEOC certification is a starting point, not a finish line. Go through yours against what the law requires, what a good one covers, and what the public record might say, and see the gaps before you rely on it.
Have the certification in front of you. Twelve questions, about three minutes. Nothing you enter leaves your browser.
A checklist on your answers, not legal or tax advice, and not a view on whether you can rely on a particular certification.
While Treasury's safe harbor tables are pending, and for a short window after they're issued, a buyer working out the material assistance cost ratio may rely on a supplier's certification. The certification must be signed under penalties of perjury and kept by both the supplier and the buyer for at least six years, and given to the IRS on request. A buyer may not rely on one it knows, or has reason to know, is inaccurate.
That last test is why the public record matters. A certification can't tell you what's in a supplier's filings; only looking can. Suppliers also face a penalty for inaccurate certifications, so expect them to read one carefully before signing.
Sources: 26 USC 7701(a)(52)(D)(iii); 26 USC 6695B; IRS Notice 2026-15. Labels: The law marks what the statute requires; Good practice and Reason to know are Battery Pulse's view of what a careful buyer checks. Rules current as of .
Next: see where your cost ratio stands with the cost ratio calculator, or rank your suppliers by what's at stake.