Self Assessment –
ace it with confidence

Find out everything you need to know to feel confident about Self Assessment, including key deadlines, who needs to file and how to complete your tax return.

How FreeAgent can help
Watch the video
An illustration of a floating balloon in the shape of a right hand making the thumbs up gesture.

Key dates for your diary

Tax year to file for:
6th April 2021 - 5th April 2022
Online tax return deadline:
Midnight, 31st January 2023
Final payment of tax due:
Midnight, 31st January 2023
HMRC will issue a late filing penalty of £100 for tax returns that are up to three months late.

Breeze through Self Assessment with our helpful guides

Not sure where to start with your tax return? Browse through our topics and guides below to find the information you’re looking for.

Before the Self Assessment deadline

The latest Self Assessment articles from our blog

Read more about Self Assessment on our blog.

Downloadable guide

Get your Self Assessment checklist

Download your all-in-one guide to completing each step of your Self Assessment tax return.

Download your guide

Self Assessment videos

What information do I need to fill out my Self Assessment?

What taxable expenses can I include in Self Assessment?

How do I record pension contributions?

Complete your Self Assessment tax return with confidence

If you're a sole trader or a limited company director, FreeAgent works away in the background to calculate your Self Assessment liability and prepare your tax return.

Get Self Assessment tax-confident

Already a FreeAgent customer?
Our Knowledge Base has lots of helpful information about filing your Self Assessment tax return using FreeAgent.

Mobile phone and laptop displaying the FreeAgent application.