Selling online has never been easier to start, and a growing number of people in the UK run a shop alongside a job or other commitments. You can begin with a handful of products and a phone, then grow if it works. But success depends on a few sensible decisions made early.
This guide explains the basics: what to sell, where to sell it, how to take payments and what rules to keep in mind. It is general information, not legal, tax or financial advice, and we are not licensed advisers. Check official GOV.UK and HMRC pages for current requirements.
Decide what to sell and who will buy it
The best starting point is a product you understand and can describe honestly. Look at what similar sellers offer, what they charge and what customers complain about in reviews. Gaps in that feedback often point to opportunities, such as better packaging or clearer sizing.
Test demand cheaply before you invest. Selling a small batch to friends, local groups or a marketplace gives real information about price and interest. Avoid anything restricted or regulated, and be cautious with products that carry safety rules, such as toys, cosmetics and electricals, because they need specific compliance steps.
Choose where to sell
There are two broad options. Marketplaces such as Etsy, eBay or Amazon bring built-in traffic but charge fees and limit your control over branding. Your own website, built with a service such as Shopify, WooCommerce or Squarespace, gives more control but requires you to attract visitors yourself.
Many beginners start on a marketplace to learn, then add a website later. Compare fees carefully, including listing, transaction and payment charges, because they eat into small margins. Prices and terms change often, so read the current pages before committing.
Work out your pricing and margins
Add up every cost: the product, packaging, postage, platform fees, payment fees and your time. Then see what is left. Many new sellers underprice and discover that a popular product barely makes money. Our guide on pricing your services has useful thinking about value that applies to products as well.
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Build in a cushion for returns and discounts. Online buyers in the UK have strong consumer rights, including a cancellation period for many distance sales, so plan for refunds from the start.
Set up payments safely
Most platforms handle payments for you, usually through card processors or services such as PayPal. If you run your own site, choose a reputable payment provider and make sure the checkout page uses HTTPS. Never ask customers to pay by bank transfer to a personal account, which is a common scam pattern.
Buyers are also wary, so show clear contact details, delivery times and returns information. Our article on how to spot a fake website lists the signals shoppers look for, so make sure your own shop does not trip them.
Photograph and describe products well
Good listings sell. Take clear photographs in natural light from several angles, and write descriptions that cover size, materials, colour and care. Answer the questions a customer would ask in a shop, and be honest about flaws.
Use plain words that match what people type into a search box. Titles stuffed with unrelated keywords are annoying and can break marketplace rules.
Plan delivery and returns
Compare couriers and Royal Mail services, and check size and weight bands, since a few extra centimetres can change the price. Offer tracking on valuable items, and package carefully to avoid damage. State your delivery times honestly, particularly in the run-up to Christmas, when delays are common.
Write a clear returns policy and keep it simple. Reliable delivery and fair returns lead to repeat custom and better reviews, which matter more than almost anything else for a new seller.
Get the legal and tax basics right
If you are trading rather than just selling a few personal items, you may need to register as self-employed and keep records. Our guide to registering as a sole trader explains the process. There are also rules on data protection if you keep customer details, and on displaying business information on your website.
Platforms are increasingly sharing seller income data with tax authorities, so it is wise to keep clean records from day one. A short session with an accountant can save you from expensive mistakes.
Make your first sales and keep customers
Start by telling people you know, then build a presence on the social channels where your buyers spend time. Post useful photos, short videos and honest behind-the-scenes updates rather than constant adverts. Ask happy customers for reviews, and respond politely to criticism.
Collect email addresses only with clear consent, and send occasional useful messages rather than daily promotions. Writing clearly helps here too, and our guide on business emails that get replies offers practical tips.
Review, learn and grow carefully
After a month or two, look at what has sold, what customers asked about and where you lost money. Drop the weak lines, order more of the winners and keep a small buffer of cash. Growth that is funded from profit is usually safer than growth funded by debt.
Selling online is a skill that improves with practice. Stay patient, keep your promises to customers and expect some mistakes along the way. Most successful small sellers started with a modest range and learned by doing.
