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UK Crypto Tax Calendar

Quick answer: Digital Assets UK's crypto tax calendar lists every UK deadline that matters for crypto holders — Self Assessment registration and filing, CARF reporting milestones and the FCA's 2027 authorisation regime — each dated and linked to its gov.uk source. Reviewed July 2026. General information, not financial advice.

  1. CARF data collection begins

    UK crypto providers start collecting CARF information.

    Source

  2. 2026/27 tax year starts

    UK tax year begins.

    Source

  3. FCA pre-application support for crypto firms

    Firms can book pre-application meetings ahead of the authorisation window.

    Source

  4. FCA authorisation applications open

    Crypto firms can apply for full FCA authorisation (window closes 28 February 2027).

    Source

  5. Register for Self Assessment (2025/26)

    Deadline to register if you first owed tax in 2025/26.

    Source

  6. Self Assessment deadline (2025/26)

    File online and pay tax due for year ended 5 April 2026.

    Source

  7. FCA authorisation application window closes

    Last day for crypto firms to apply before the mandatory October 2027 regime.

    Source

  8. Full UK crypto regime in force

    Mandatory FCA authorisation for in-scope crypto activities begins.

    Source

Frequently asked questions

When is the Self Assessment deadline for crypto? +

For the 2025/26 tax year, file online and pay by 31 January 2027. Register for Self Assessment by 5 October 2026 if you first owed tax in that year.

When does the UK tax year run? +

The UK tax year runs 6 April to 5 April. Crypto disposals and income are reported against the tax year in which they happen.

When do the FCA's full crypto rules start? +

The mandatory FCA authorisation regime for in-scope crypto activities begins on 25 October 2027. Firms can apply between 30 September 2026 and 28 February 2027.

Deadline pages are refreshed every December ahead of the January Self Assessment peak. See also the January deadline checklist →