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UK self assessment guide · Plain English · Updated for 2026/27

The Complete UK Self Assessment Guide

Self Assessment is how HMRC collects tax that is not taken automatically through PAYE. If you are self-employed, a company director, a landlord, or you have side income, you probably need to file a return. This guide pulls the essentials together in plain English and links to detailed articles, with the key dates so nothing catches you out.

Yoni Finke FCCA, founder of YF Accounting
Yoni Finke FCCA
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Who it’s for

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  • Sole traders and the self-employed who file their own return.
  • Landlords and anyone with income outside of PAYE.
  • Company directors who need to file Self Assessment.

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