Do I need to register as self-employed to sell online?
One of the most common worries for online sellers is whether they need to officially register as self-employed. For a lot of people the answer is no. Here is when you do need to, when you do not, and how to do it if you must.
General information, not tax advice. Check with HMRC or a qualified accountant before you act on it.
You only register if you are trading and over £1,000
Two things need to be true before you register. First, you need to be trading, which means buying or making things to sell for a profit, rather than just selling your own belongings. Second, your trading sales in a tax year need to be over £1,000. If either is not true, you normally do not need to register at all.
Selling your own things does not count
If you are clearing out your own wardrobe, old furniture or unwanted gifts, that is not a business and you do not register for it, no matter how much it adds up to. Registration is only for trading.
Under £1,000? The trading allowance covers you
Even if you are trading, the £1,000 trading allowance means you can earn up to £1,000 in sales in a tax year without registering or paying tax. This is measured on your sales before costs, not your profit. Stay under it and there is usually nothing to do.
How to register
If you are over, you register as a sole trader for Self Assessment on the gov.uk website. It is free and fairly quick. HMRC then sends you a Unique Taxpayer Reference, which you need in order to file your tax return later.
The 5 October deadline
You must register by 5 October in the tax year after the one you went over the allowance in. So if you crossed £1,000 during the 2026/27 tax year, you register by 5 October 2027. Registering does not mean you owe tax, it just puts you in the system so you can report.
Being registered is not the same as owing tax
A lot of people register, report their income, and still owe nothing once the trading allowance and their £12,570 personal allowance are taken into account. Registration is about telling HMRC, not about handing over money.
Frequently asked questions
Do I need to register as self-employed to sell on eBay?
Only if you are trading (buying to resell) and your sales pass £1,000 in a tax year. If you are just selling your own things, or you are under £1,000, you normally do not.
When is the deadline to register?
By 5 October in the tax year after you went over the £1,000 allowance. So if you passed £1,000 in 2026/27, register by 5 October 2027.
Does registering mean I will owe tax?
Not necessarily. Many people register, report, and still owe nothing after the trading allowance and their £12,570 personal allowance. Registering just tells HMRC.
See where you actually stand
Get a rough answer in about a minute with the free calculator, or connect your eBay account to see your real profit and tax.
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This guide is general information, not tax advice, and reflects the UK rules for the current tax year. Always check with a qualified accountant before you file. FlipTally is independent and not affiliated with, endorsed by or connected to eBay, Vinted, Depop or HMRC. Last updated 2026-08-04.