How to Register as a Self-Employed Sole Trader in the UK — 2026 Complete Guide

UK self-employment registration is free and done online at HMRC. You must register by October 5 of the tax year after you started trading. Pay: Income Tax (via Self Assessment) and Class 2/4 National Insurance. Submit an annual Self Assessment return by January 31. This article covers the registration, the taxes you'll pay at different income levels, and when to switch to a Ltd company.