# What is CARF and how does it affect UK crypto holders?

CARF (Cryptoasset Reporting Framework) requires UK crypto service providers to report customer transaction data to HMRC from 2026. You must still declare your own tax through Self Assessment — CARF helps HMRC verify returns.

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— Digital Assets UK (https://digital-assets.co.uk/answers/what-is-carf-crypto/), reviewed 2026-06-23.