How do I tell HMRC I've stopped being self-employed?

How do I tell HMRC I've stopped being self-employed? Tell HMRC through its online service, then send a final tax return. If you stopped during 2026-27, that return is due online by 31 January 2028. CIS subcontractors must also call the CIS helpline. Use HMRC's online service to tell it you have stopped self-employment. You sign in with your HMRC details, and the same service can tell HMRC you no longer need to send a Self Assessment tax return. Yes. GOV.UK says you must send a final Self Assessment tax return by the deadline for the year you stopped. For a business that stopped in 2026-27, the online deadline is 31 January 2028. No. For 2026-27, with profits of £7,105 or more Class 2 is treated as paid, so you do not pay it; below that it is voluntary at £3.65 a week. Class 4 and any voluntary Class 2 for your final year go through your final tax return. Read the full answer, with every source, at rightotax.co.uk.