How much can you sell on eBay before paying tax?

The question "how much can I sell on eBay before paying tax" conflates two entirely separate rules, and untangling them is the key to answering it properly.

The first rule is about whether your selling is a trade at all. Selling your own unwanted possessions — clothes, old electronics, furniture you no longer need — is not trading, no matter how much money changes hands, because you are simply disposing of personal property, usually for less than you originally paid.

The second rule only applies once you are trading: buying stock, making items, or sourcing goods specifically with a view to resale for profit. Here, the £1,000 trading allowance gives you tax-free gross trading income up to that amount each tax year. Cross it, and you generally need to register for Self Assessment by 5 October following the end of the tax year in which you started trading.

Separately again, eBay — like Vinted, Depop and other digital marketplaces — must report seller information to HMRC once a seller passes around 30 sales transactions or roughly £1,700 in payments during the calendar year, under digital platform reporting rules that took effect from January 2024.

This reporting threshold is not a tax-free allowance and does not indicate trading status. A seller clearing out a house move might easily pass 30 transactions and £1,700 without ever being liable for a penny of tax, while someone trading small amounts of stock below that threshold could still owe tax on modest but genuine trading profit.

Once you have established you are trading and past the £1,000 allowance, profit — not gross sales — is what gets taxed. Deduct genuine costs (stock, postage, fees, a share of home costs used for the business) or the flat £1,000 allowance, whichever is lower, then pay Income Tax at your marginal rate (20%, 40% or 45%) plus Class 4 National Insurance of 6% between £12,570 and £50,270 and 2% above that.

For an eBay Business account holder, HMRC generally expects trading to be assumed by default, since a business account signals intent to sell commercially, making record-keeping from day one especially important.

If you sell across multiple platforms — eBay, Vinted and Depop, say — all trading income is combined for the £1,000 allowance test; you do not get a separate allowance per platform.

The practical upshot: work out whether you are trading first. If you are not, the reporting threshold is irrelevant to your tax position. If you are, the £1,000 trading allowance — not the 30-sales figure — is what actually determines when tax starts to apply.

Source: Income Tax rates and allowances (gov.uk) · Self Assessment (gov.uk)