UK CBAM registration threshold checker
The £50,000 threshold is TWO tests, not one, and it is not an annual allowance. From 1 January 2027 you check on the first day of each month whether your imports over the preceding 12 months reached it — a window that rolls, so old months drop out. Separately, on any day, you are liable if you expect to reach it in the next 30 days, with no history at all. Meet both and HM Revenue & Customs (HMRC) registers you from the earlier date. Enter your numbers below to run both.
Value of CBAM goods you import, or expect to import, into the UK, per month
Aluminium, cement, fertilisers, hydrogen, iron & steel. Whole pounds; leave empty months blank. Imports before 1 January 2027 do not count towards the threshold, so months still ahead are your forecast.
And the other half of the test
You are also liable if you expect to import £50,000 or more of CBAM goods in the next 30 days — on its own, with no import history at all.
Result
Enter at least one month, or what you expect over the next 30 days, to test against the £50,000 registration threshold. Both halves of the test count.
Guidance based on HMRC / gov.uk — UK CBAM regulations & guidance. Informational only — not tax or legal advice.
UK CBAM Readiness Pack
A working Excel file, not a report. Five sheets: the dates with what you need done by each, a rolling 12-month threshold test you fill in, a liability estimate covering 260 CN codes across all five UK sectors that prices your own tonnage, and the eight questions to send your suppliers now.
Read this first:HMRC has not published the UK default values yet. The estimate uses the EU's published values for the same CN codes as a stated proxy, with the low–high spread shown so you can see the uncertainty. It is for sizing and budgeting, never for a declared figure.
One-off payment, instant download, link valid 12 months. Not tax or legal advice.