Selling On A Marketplace like eBay or Vinted?

Selling online through a marketplace has never been easier. A few photos, a quick description, and suddenly you’ve turned that pile of clothes, gadgets or “I’ll definitely use this one day” items into cash.

Platforms like eBay, Vinted and Etsy have made it simple for anyone to sell whether it’s the occasional clear-out or a full-blown side hustle. What’s less obvious, though, is what happens from a tax point of view. While selling online might feel casual, HMRC is paying more attention than ever.

First things first: not everything is taxable

Before we go any further, let’s clear something up. Selling your own personal items isn’t usually taxable. If you’re:

• Clearing out your wardrobe on Vinted

• Selling old furniture

• Getting rid of things you already owned

Then in most cases, you’re not making a profit. You’re just recovering some of what you originally spent.

Example

You bought a jacket for £100 and sell it for £25. That’s not a profit. That’s just making space (and maybe funding your next purchase). So no, HMRC isn’t interested in your occasional declutter.

When does marketplace selling become a business?

Things change when your activity starts to look more like trading.

HMRC looks at things like:

• Are you buying items specifically to resell?

• Are you selling regularly?

• Are you aiming to make a profit?

• Are you improving or repackaging items before selling?

If the answer to those is “yes”, you’re likely running a business, even if it doesn’t feel like one.

Example

• Buying trainers to resell at a higher price ✔

• Sourcing vintage clothes to flip on Vinted ✔

• Making and selling products on Etsy ✔

At that point, tax rules apply.

The £1,000 trading allowance

Here’s a helpful one. If your total income from trading is £1,000 or less per tax year, you don’t need to:

• Register as self-employed

• Submit a tax return

This £1000 is called the trading allowance.

Once you go over £1,000: You need to start taking things more seriously. That doesn’t mean huge tax bills, it just means reporting your income properly.

What information does HMRC receive?

This is the bit that’s changed recently and the reason this topic is coming up more often.

Online platforms like:

• eBay

• Vinted

• Etsy

• Amazon

Now share information with HMRC about sellers.

This can include:

• Number of transactions

• Total sales value

• Seller details

Being reported to HMRC does not automatically mean you owe tax. But it does mean HMRC can:

• See your activity

• Compare it with what you’ve declared

• Ask questions if something doesn’t match

So it’s no longer something that sits quietly in the background.

What are your obligations?

If you are trading (i.e. running a business), you need to:

1. Register for self-assessment

This tells HMRC you have income outside of employment.

2. Keep records

You should keep track of:

• Sales

• Expenses (cost of items, fees, packaging, postage)

• Platform fees

• Any other business costs

3. Submit a tax return

Each year, you’ll report:

• Your income

• Your expenses

• Your profit

And pay tax on the profit (not the total sales).

Example

You sell £10,000 worth of items but:

• Stock cost: £6,000

• Fees and expenses: £2,000

Your profit is £2,000 and that’s what you’re taxed on.

Common mistakes to avoid

❌ “It’s just a hobby”

If you’re making a profit and trading regularly, HMRC may see it differently.

❌ “It’s only online, so it doesn’t count”

Online income is still income.

❌ “HMRC won’t know”

With platform reporting, this is becoming much less likely.

❌ Not keeping records

Trying to recreate a year’s worth of sales and expenses later is… not fun.

A few real-world scenarios

1. The declutterer

Selling old clothes occasionally → usually not taxable ✔

2. The side hustler

Buying items to resell on eBay → likely a business ✔

3. The Etsy creator

Making and selling handmade products → definitely a business ✔

4. The accidental business

Selling regularly, making a profit, but not really thinking of it as a business → still taxable ✔

Don’t panic; just be informed

This isn’t about catching people out. It’s about:

• Understanding when tax applies

• Keeping things simple and organised

• Making sure you’re doing things properly

Most people aren’t doing anything wrong they just don’t realise the rules.

Final thoughts

Selling online is a brilliant way to:

• Clear space

• Make extra income

• Even build a business

Once it moves beyond casual selling, it comes with responsibilities. Not everything is taxable but some things are and HMRC is now more aware than ever. The key is knowing where you sit because once you understand the rules, it’s much easier to stay on the right side of them without losing sleep (or your Vinted profits).