Selling on eBay: When HMRC Treats It as a Business

Selling your own unwanted belongings on eBay is not taxable, however much they fetch. Tax only enters the picture when you are trading — buying, making or sourcing things with the intention of selling them at a profit — and even then the first £1,000 of gross trading income each tax year is covered by the trading allowance. The reports eBay sends to HMRC are a data-matching exercise, not a tax bill.

• Clearing out your own stuff is not a trade. No registration, no return, no tax.
• Buying to resell is a trade from the first sale — HMRC looks at the "badges of trade", not at how casual it feels.
• The trading allowance is £1,000 of gross income, not profit. Go over it and you normally need to register for Self Assessment.
• eBay reports sellers with 30+ sales or around €2,000 of sales in a calendar year — that threshold has nothing to do with whether you owe tax.
• Profits are taxed at your marginal rate, plus Class 4 National Insurance at 6% once self-employed profits pass £12,570.

What eBay tells HMRC, and what it doesn't

Since January 2024, online marketplaces including eBay have had to collect seller information and pass it to HMRC once a year under international digital platform reporting rules. A platform must report a seller who, in a calendar year, either makes 30 or more sales of goods or receives total consideration of around €2,000 (roughly £1,700, depending on the exchange rate used). Platforms send the data to HMRC by 31 January after the end of the calendar year and must give you a copy of what they reported.

Three points are constantly misunderstood:

• It is a reporting threshold, not a tax threshold. You can be reported and owe nothing (a big declutter), or be under the threshold and owe tax (three high-value resales bought to flip).
• It runs on the calendar year, while your tax position runs on the tax year to 5 April.
• The figures are gross — what buyers paid, before eBay fees, postage and the cost of the item.

What HMRC does with it is match names, addresses and payment details against its own records. If the data suggests trading and there is no matching tax record, you may get a "nudge" letter asking you to check your position. GOV.UK has guidance on selling goods or services on a digital platform.

There is also a wider change in the pipeline: the government has announced an intention to raise the Self Assessment reporting threshold for gross trading income to £3,000, so that people with small side incomes can report through a simpler route instead of a full tax return.

Decluttering versus trading

The dividing line is intention at the point you acquired the item. If you bought a coat to wear, a bike to ride or a console to play on, selling it later is disposing of a personal possession. If you bought it to sell on, you are trading.

Two wrinkles catch people out. First, Capital Gains Tax on personal possessions: selling a single chattel for more than £6,000 — a watch, a painting, a rare guitar — can produce a chargeable gain. With the annual exempt amount at £3,000 and CGT rates of 18% for basic-rate taxpayers and 24% for higher and additional-rate taxpayers, most declutters never reach it, but a genuinely valuable one-off sale can. Cars are exempt.

Second, mixed activity. Plenty of sellers start with a declutter and drift into buying stock. From the point where you begin buying to resell, the resale side is a trade; the leftover personal items are not, and their proceeds are not part of your turnover.

The badges of trade

There is no statutory definition of trading. HMRC and the courts apply the "badges of trade" — a set of indicators applied together, with no single one deciding the outcome:

1. Profit-seeking motive — did you intend to make money from the transaction?
2. Number and frequency of transactions — repeated, systematic sales point to a trade.
3. Nature of the asset — is it something that gives personal use or enjoyment, or only resale value?
4. Existence of similar trading transactions — does it look like what dealers in that market do?
5. Changes to the asset — repairing, restoring, repackaging or bundling to make it saleable.
6. The way the sale was carried out — professional photos, branded packaging, an eBay shop, paid promotions.
7. Source of finance — borrowing to buy stock, especially if repayment depends on selling it.
8. Interval between purchase and sale — a quick turnaround suggests buying to sell.
9. Method of acquisition — inheritance and gifts point away from trading; deliberate purchase points towards it.

If you are unsure which side of the line you sit on, our side hustle tax check walks through the same questions HMRC would ask and tells you whether you need to do anything.

The £1,000 trading allowance

If you are trading, the trading allowance gives you £1,000 of gross trading income tax-free each tax year. The key word is gross: it is measured on what buyers paid you across all your self-employed activity, before deducting eBay fees, postage, packaging or the cost of stock.

Two outcomes follow:

• Gross trading income £1,000 or less: full relief applies automatically. You do not need to register for Self Assessment for that income, and there is nothing to report (unless you must file a return for another reason, such as the High Income Child Benefit Charge).
• Gross trading income above £1,000: you normally need to register and report it. You then choose, each year, whichever gives the lower taxable figure: deduct the £1,000 allowance from your gross income, or deduct your actual allowable expenses. You cannot do both.

For resellers, actual expenses usually win, because the cost of stock is the biggest number. Take gross sales of £4,200, stock cost £2,100, eBay and payment fees £460, and postage and packaging £540:

• Trading allowance route: £4,200 − £1,000 = £3,200 taxable profit.
• Actual expenses route: £4,200 − £3,100 = £1,100 taxable profit.

The expenses route saves tax on £2,100 of profit — £420 at the 20% basic rate. The allowance route only makes sense when your costs are genuinely under £1,000, for example if you sell things you were given or made from materials you already owned. Our full guide to the trading allowance covers the exclusions, including that you cannot use it against income from a partnership you are in or from a company connected to you.

Worked example: employed, plus eBay reselling

Priya earns £35,000 in a job in England. In 2026/27 she resells sportswear on eBay: gross sales £14,000, stock £6,000, fees £1,300, postage and packaging £1,200, and £200 of software and printer costs. Her profit is £14,000 − £8,700 = £5,300.

• Her Personal Allowance of £12,570 and the whole of her basic-rate band are already in use by her salary, so the £5,300 is taxed at 20% = £1,060.
• Class 4 National Insurance: charged at 6% on self-employed profits between £12,570 and £50,270. Her profits are £5,300, below the threshold, so Class 4 is £0. Salary does not count towards the Class 4 threshold.
• Class 2: her profits are below the £7,105 small profits threshold, so she can pay Class 2 voluntarily at £3.65 a week to protect her State Pension record if she wants the year to count.

Total extra tax: £1,060, due by 31 January 2028. If her profits had been £20,000 instead, Class 4 would be (£20,000 − £12,570) × 6% = £445.80 on top.

In Scotland the income tax rates differ — trading profits are non-savings income, so a Scottish taxpayer in the same position would pay 21% intermediate rate or 42% higher rate depending on total income. National Insurance is the same UK-wide. You can model your own numbers with the side hustle tax calculator.

Registering with HMRC

If you are trading and your gross trading income exceeds £1,000, the steps are:

1. Register for Self Assessment as self-employed by 5 October after the end of the tax year in which you started. For a trade starting in 2026/27, that is 5 October 2027. Use register for Self Assessment on GOV.UK.
2. Keep records of every purchase and sale: date, item, what you paid, what it sold for, eBay and payment fees, postage, packaging, mileage to the post office. Bank and eBay statements are not enough on their own if the stock cost came from cash purchases.
3. File the return by 31 January after the tax year ends (31 January 2028 for 2026/27) and pay the tax by the same date. Payments on account may apply once your bill passes a certain size.
4. Watch two other thresholds. VAT registration becomes compulsory once taxable turnover passes £90,000 in any rolling 12 months. And Making Tax Digital for Income Tax applies from April 2026 where gross self-employment or property income exceeds £50,000, which means quarterly updates rather than one annual return.

If you have been trading for a while without declaring it, the position is better handled proactively than after a letter arrives: HMRC penalties are lower where a disclosure is unprompted, and interest runs on unpaid tax either way. You can register and file late returns for earlier years.

What to do next

Work out which side of the line you are on before you worry about numbers. If you were only clearing out your own belongings, there is nothing to report however many parcels you posted. If you were buying to sell, start with the side hustle tax check, then put your gross sales and costs into the side hustle tax calculator to see the tax and National Insurance on your profit, and read the trading allowance guide to decide whether to claim the £1,000 or deduct your real expenses.