Selling your old sofa, clothes, or childhood collectibles online is almost always tax-free. But there are important exceptions — and since 2024, HMRC receives data directly from eBay, Vinted, and dozens of other platforms. Here is exactly when tax applies and when it does not.
The Basic Rule: Personal Possessions vs Trading
There are two entirely different tax frameworks depending on what you are doing:
| Activity | Tax treatment |
|---|---|
| Selling genuine personal possessions you have owned and used | Capital Gains Tax — usually exempt via chattel rules or annual allowance |
| Buying items to resell for profit (trading) | Income tax + Class 4 NI — as self-employment income |
Most casual sellers fall into the first category. HMRC only treats selling as trading if the “badges of trade” point towards a commercial operation (see below).
The Chattel Exemption — Most Personal Items Are Tax-Free
A chattel is a tangible, moveable personal possession. The UK has a specific CGT rule for chattels:
| Sale proceeds | CGT position |
|---|---|
| £6,000 or under | Completely exempt — no CGT, no reporting |
| Over £6,000 | CGT applies, but only on the gain; marginal relief applies |
Worked example: Claire sells her vintage camera
Claire bought a camera for £800 and sells it on eBay for £1,200. Proceeds are under £6,000 — no CGT due, no need to report.
Worked example: David sells an antique watch
David inherited a watch valued at £4,000 (his CGT base cost). He sells it for £9,500.
- Gain: £9,500 − £4,000 = £5,500
- Annual CGT exempt amount 2026/27: £3,000
- Taxable gain: £2,500
- CGT at 18% (basic rate): £450
Wasting Chattels — Always Exempt
Wasting chattels — items with a useful life under 50 years — are entirely CGT-exempt regardless of sale price:
- Cars (all, including classic cars)
- Watches
- Computers, phones, electronics
- Furniture (generally, not antiques)
- Boats and caravans with limited lifespans
You can sell a classic car for £50,000 profit — no CGT.
CGT Annual Exempt Amount
Even if a gain does not fall under the chattel exemption, the CGT annual exempt amount covers most modest gains:
- 2026/27: £3,000
If total gains across all disposals in the year are under £3,000, no CGT is due.
When Does Online Selling Become Trading?
HMRC uses a set of “badges of trade” to assess whether activity is trading rather than personal disposals:
| Badge | Suggests trading |
|---|---|
| Motive | Bought specifically to resell at profit |
| Frequency | Regular, repeated transactions |
| Volume | Large number of items sold |
| Modification | Items improved or altered before sale |
| Financing | Borrowed money to buy the items |
| Organisation | Running like a business (listings, branding, bulk purchasing) |
No single badge is decisive. A person who cleared their attic of 50 old items over 3 months is not trading. Someone who buys job lots at car boot sales every weekend and resells them online is likely trading.
Trading income above £1,000/year must be declared as self-employment income on a Self Assessment return. The £1,000 trading allowance applies.
How HMRC Now Monitors Online Sellers
Since January 2024, UK digital platforms are legally required to collect and report seller data to HMRC annually under the OECD DAC7 rules. Platforms affected include:
- eBay, Vinted, Depop, Facebook Marketplace
- Etsy, Amazon Marketplace, Not On The High Street
- Airbnb, Booking.com, VRBO
- Fiverr, TaskRabbit, Deliveroo, Uber Eats
HMRC receives: seller name, address, national insurance number (if provided), bank details, and annual gross sales. This is fed into the Connect system alongside tax records.
Sellers with significant, regular income who have not declared it will increasingly receive HMRC nudge letters or compliance checks.
What Platforms Report vs What Is Actually Taxable
Reporting threshold ≠ taxable threshold. Platforms report sellers who make 30+ sales or earn over €2,000 (approximately £1,700) in a year — but this does not mean everything reported is taxable. Selling £5,000 of your own clothes is still potentially tax-free under the chattel rules.
HMRC will cross-reference the reported data with your tax position. If you have legitimate reasons why reported sales are not taxable (personal possessions, below chattel limits, covered by annual exemption), you do not owe any tax — but you may need to be able to explain this if asked.
See our trading allowance guide, cash in hand tax guide, and capital gains tax guide.