Common mistakes when closing self-employment in the UK

One of the most common mistakes when closing self-employment with HMRC is failing to officially notify them. If you don’t report that you’ve stopped trading, your self-employed status remains active, and HMRC will continue expecting annual Self Assessment tax returns even if you have no income.

Another frequent issue is an incorrect final tax return. It’s important to clearly state the exact date you stopped trading and include all income and expenses up to that point. Any mistakes or missing information can lead to recalculations, HMRC enquiries, or unexpected correspondence.

Many people also forget about Payments on Account, which are advance tax payments that may remain active even after you stop being self-employed. If these are not reviewed or adjusted, you may end up overpaying or receiving incorrect demands.

Finally, it’s important to understand that tax debts do not disappear after closing self-employment. Any outstanding Income Tax or National Insurance contributions remain payable until fully settled with HMRC.