When Should You Register for Self Assessment?
Register for Self Assessment as soon as you start earning self-employment income. The formal deadline is 5 October following the end of the tax year you need to file for, but registering earlier gives you more time.
Why Register Early
- Your UTR takes 10 working days to arrive by post
- Enrolment for the online service requires another activation code (7-10 days)
- Early registration means no last-minute panic when filing deadlines approach
- You can start keeping proper records from day one
The Formal Deadline
If you start self-employment in 2026/27, you must register by 5 October 2027. Missing this deadline can result in a penalty.
How to Register
Register online at GOV.UK as self-employed. You will need your NI number, personal details, and the date you started trading.
Accounted guides you through the setup process and helps you start keeping records immediately.
Accounted handles your bookkeeping, tax estimates, and MTD submissions automatically. Start your free trial — no credit card required.
Tax & Compliance Specialists
Our tax specialists have decades of combined experience in UK sole trader and small business taxation, MTD compliance, and HMRC submissions. All content is reviewed against current HMRC guidance before publication and updated quarterly to reflect legislative changes.
Ready to try Accounted?
Join UK sole traders who are simplifying their bookkeeping and tax.
Start your 14-day free trial