Free tool · runs on this page · file never stored
What would UK CBAM cost you? Ask your customs data.
Upload the import ledger your broker's system already exports — CSV or Excel, no re-keying, headings like “Entry date”, “CN code” or “Net mass (kg)” are understood as-is. You get an indicative 2027 liability priced line by line with its working shown, the £50,000 registration-threshold test run the statutory way, and a ranked list of the suppliers to chase for real emissions data first.
Process-and-delete
Your file is parsed in memory and discarded when the page responds. No copy is kept, nothing line-level is stored or emailed.
The statutory tests, actually
Scope resolves against the enacted Schedule 16 goods table — exclusions like ferrous scrap included — and the £50k test runs month by month, the way the Act says.
Built for what comes next
The ranked supplier list feeds our free data-request template — because collecting verified supplier data through 2027 is the whole game.
Want to see the full workflow — messy supplier spreadsheets and all — before uploading anything? Walk through the worked example. Customs brokers and forwarders: this tool run across a client book is a conversation starter — partnering with CBAMReturn.
Rules basis: Finance Act 2026 plus core CBAM regulations made July 2026; emissions & verification detail still in draft. Last reviewed 2026-07-16. General information, not tax advice.