Understand your Self Assessment tax bill

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Overview

When you submit a Self Assessment tax return, you’ll get a: 

Your Self Assessment statement is a summary of what you owe and payments you have made.

Your tax calculation is a summary of the tax you owe for the tax year.

This guide is also available in Welsh (Cymraeg).

Paying your Self Assessment tax bill 

You need to by midnight on 31 January (following the tax year you’re paying for) to avoid a penalty.Ìý

Find out what to do .