How do I register as self-employed?

If you are starting to earn income outside of employment — whether as a freelancer, contractor, or small business owner — you will likely need to register as self-employed with HMRC. Many people delay this step through unfamiliarity with the process, which can lead to late registration and avoidable penalties.

Registering as self-employed means notifying HMRC that you are working for yourself and will need to complete a Self Assessment tax return each year. Registration is carried out online via the HMRC website. Once registered, you will receive a Unique Taxpayer Reference and be enrolled in the Self Assessment system. You become responsible for calculating and paying your own Income Tax and National Insurance contributions based on your business earnings each tax year.

HMRC sets a registration deadline tied to the tax year in which you began self-employed work — registering promptly avoids late penalties and ensures your tax affairs are in order from the start. Our guides to Self Assessment and self-employed tax obligations explain what to expect once registered and how to manage your ongoing tax position.