How to Sell Stuff Online in the UK: A Beginner's Guide (2026)

Not tax or legal advice - rules change, so check the linked gov.uk pages for your situation.

Decide what kind of seller you are

The route you take shapes everything else - the sites you pick, the tax rules that apply, and how much effort each sale takes. Most people fall into one of three groups:

• Clearing your own things. Clothes, furniture, gadgets you no longer use. Low effort, mostly one-off.
• Buying to resell. Charity shops, car boots, wholesale, clearance stock. This is trading, even if you think of it as a side hobby.
• Making or sourcing your own products. Handmade goods, print-on-demand, or products you have manufactured. This is a business from day one.

The tax rules to know before you start

Do this before your first sale, not after your hundredth. The short version, as set out by HMRC:

• The trading allowance is £1,000 a year. If your total income from trading (selling things you bought or made to resell for a profit, including hobby items you make) is more than £1,000 in a tax year (6 April to 5 April), you need to tell HMRC.
• Selling your own possessions is different. Items you bought for your own use - clothes, furniture, jewellery - are generally not taxed as trading, and gov.uk notes a Capital Gains Tax threshold of £6,000 for a single item or set sold at a profit.
• Platforms now report sellers to HMRC. Since 1 January 2024, digital platforms such as eBay and Vinted have to collect seller details and share them with HMRC, with the first reports made in January 2025. Sellers who sold 30 or more items, or earned about £1,700 (2,000 euros), in a year will be told their details were shared. Sharing is not a new tax and does not automatically mean you owe anything.
• VAT is a separate threshold. You must register for VAT if your taxable turnover goes over £90,000 in a 12-month period.

Read the official pages: check if you need to tell HMRC about income from online platforms, information for online sellers and when to register for VAT. If you are buying to resell, keep records of what you buy and sell from day one.

Choose where to sell

You do not need to be everywhere. Start with the one site that best fits what you sell:

For a fuller comparison, see our guides to the best sites to sell online in the UK and the best second-hand selling sites. Fees change, so check each site's current fee page before you commit.

Prepare your items and listings

Listings that convert are simple and honest. A good rhythm for each item:

1. Photograph it well. Natural light, a plain background, and every angle including flaws. Buyers trust listings that show wear.
2. Write a clear title. Put what it is first - brand, item type, size, colour, model - because that is what people search for.
3. Describe the condition honestly. Mention marks, missing parts and what is included. It prevents most returns and disputes.
4. Fill in the details the site asks for. Category, condition, size, and product identifiers where they apply. Complete listings are easier to find.
5. Give each item a reference. A short code you can find later, kept in a spreadsheet or your stock tool. This is the start of a SKU - see what is a SKU.

Price it properly

Look up what similar items have actually sold for, not what they are listed at. Then check that the price still leaves a profit after the site's fees and your postage. If you bought the item to resell, work out your margin - our guide to markup vs margin shows how to price from the profit percentage you want, and the eBay fees calculator helps with the eBay side.

Postage, returns and customer service

• Decide your postage before you list. Weigh and measure the packed item and choose a service that suits its size and value. Over-charging or under-charging postage both hurt.
• Pack it properly. A damaged item costs you the sale, the refund and often the postage twice.
• Know your returns position. The rules are different for a private clear-out than for a business sale - if you are selling as a trader, consumer law gives buyers more rights, so check current gov.uk and Trading Standards guidance.
• Reply quickly and keep it polite. Fast, clear messages prevent most problems and protect your seller rating.

If you post regularly, a business account can make it cheaper and quicker - see our Royal Mail Online Business Account guide.

When to add a second site (and keep stock straight)

Most sellers begin on one site. A second one makes sense when sales slow down or you are running out of buyers - but the moment the same stock is listed in two places, you can sell one item twice. That means a cancelled order, an annoyed buyer and sometimes a mark against your account.

There are three ways to manage it: keep a spreadsheet and update it by hand, list each item on only one site at a time, or use software that keeps one stock count across your sites. Our guide on how to sell on eBay, Etsy and Shopify at the same time covers the trade-offs. Salync is built for the third route - one stock count that updates across eBay, Shopify, Etsy and more, free for up to 50 products.

Frequently asked questions

Do I need to pay tax on things I sell online in the UK?

Not usually if you are selling your own unwanted possessions. If you buy items to resell or make things to sell, that is trading, and you need to tell HMRC if your trading income is over the £1,000 trading allowance in a tax year. Check the official gov.uk guidance for your situation.

Does HMRC know what I sell on eBay or Vinted?

Digital platforms have to collect seller information and share it with HMRC. The rules applied from 1 January 2024, with the first reports made in January 2025. Sharing your details does not automatically mean you owe tax.

How much can I sell online before I pay tax in the UK?

The trading allowance is £1,000 a year for income from trading. Selling your own possessions is treated differently. VAT registration only becomes compulsory at £90,000 of taxable turnover in 12 months.

What is the best site to start selling on?

It depends on what you sell. eBay suits almost anything, Vinted suits clothes, and Etsy suits handmade and vintage items. Start with the one that best matches your product and add another later.

Do I need to set up a business to sell online?

Not to clear out your own belongings. If you are buying to resell or making products regularly, you are likely trading, which has tax and consumer-law consequences. Check gov.uk or ask an accountant.