If UK goods go to India for processing and come back, how does the UK Carbon Border Adjustment Mechanism (CBAM) treat them?

HM Revenue and Customs (HMRC) says that when a CBAM good re-enters the UK as a CBAM good, the charge arises on the good that passes the tax point. HMRC says only the difference in value between the original and processed good counts towards the £50,000 threshold. A non-CBAM good coming back carries no CBAM.

The outcomes, as HMRC sets them out

• Goods can be exported for processing outside the UK under the outward processing procedure, or when a good leaves Northern Ireland to be processed in the European Union before returning to Northern Ireland.
• If the exported good is processed and re-enters the UK as a CBAM good, "the CBAM charge will arise based on the CBAM good that passes the tax point".
• If the original good was a CBAM good of UK origin that was subject to a carbon price in the UK, "the carbon price previously incurred can be used to adjust the CBAM liability down".
• HMRC says only the difference in value between the original good and the processed CBAM good counts towards the £50,000 minimum registration threshold. Its sentence follows the point about UK origin and a carbon price.
• If it is re-imported as a non-CBAM good, there is no CBAM liability "as the good is no longer chargeable".

What it means for the processor

Our reading, not HMRC's: the charge rests on the processed good, so the importer will ask the processing plant for emissions data on that good, or use a default value. A plant that only adds a process step still needs its own monitored figures if the importer wants actual emissions.

Value that counts towards the threshold

• Original value when exported from the UK: £70,000.
• Value of the processed CBAM good re-imported: £130,000.
• Difference: £130,000 minus £70,000 = £60,000.
• Only the £60,000 counts towards the £50,000 threshold, so this one consignment meets it on its own.

Example values.

What Senseible does here

Senseible reads fuel invoices and electricity bills into dated records, which feed a plant's emissions figure. It does not handle customs procedures or decide which value counts for a UK importer.

• How the threshold is valued
• Steel into inward processing
• UK-made steel inside your product
• Country of origin on the return

Sources: HM Revenue and Customs, Carbon Border Adjustment Mechanism (CBAM): Policy summary (updated 2 November 2026)

Last reviewed 2026-11-05. HM Revenue and Customs says the details in its policy summary may be subject to change. Re-check the policy summary and the keeping-records page before relying on a date or condition.