How to Set Up an Ecommerce Business Online: A Practical UK Guide
Published 25th of April 2012·Updated 20 April 2026
Reviewed by: Reviewed for accuracy April 2026
Setting up an ecommerce business online involves five core steps: a professional web design, the right ecommerce platform, a merchant account, a payment gateway, and reliable web hosting. Get these five things right and you have a solid foundation for selling online in the UK.
Short Summary
Choosing the right ecommerce platform is the most important technical decision you will make. Platforms like Shopify, WooCommerce, and BigCommerce are widely used in the UK and each suits different business sizes and budgets.
You need both a merchant account and a payment gateway to accept card payments online. The merchant account holds your funds; the gateway processes each transaction securely in real time.
Web hosting uptime is critical. A host that goes down during peak trading hours costs you sales. Look for hosts that guarantee at least 99.9% uptime and provide automatic failover.
Keeping your site design clean and simple increases conversions. Every unnecessary element competes for your customer's attention and reduces the chance they complete a purchase.
What ecommerce platform should I choose?
The right ecommerce platform depends on the size of your business and your technical confidence. Shopify is the most popular choice for UK small businesses because it handles hosting, security, and software updates for you, with plans starting from around £25 per month. WooCommerce is a free plugin for WordPress and suits businesses that want more control over their site, though it requires more technical knowledge. BigCommerce is a stronger option if you plan to scale quickly and need advanced product management features from the start.
All three support UK payment providers, VAT calculations, and integration with Royal Mail and courier services. Avoid building a custom platform from scratch unless you have a very specific requirement that off-the-shelf solutions cannot meet; the maintenance cost is rarely worth it for a new business.
How do I take card payments on my ecommerce site?
To take credit and debit card payments, you need two things: a merchant account and a payment gateway. A merchant account is a type of business bank account that receives the funds from card transactions before they are transferred to your main account. High-street banks including Barclays, NatWest, and HSBC all offer merchant accounts for UK businesses.
A payment gateway is the technology that connects your website to your merchant account. It encrypts the customer's card details and processes the transaction in real time, around the clock, even when the banks are closed. Providers such as Stripe, PayPal, and Worldpay are widely used in the UK. Some platforms, including Shopify, have their own built-in payment gateway which removes the need for a separate merchant account.
| Provider | Monthly fee | Transaction fee | Best for |
|---|---|---|---|
| Stripe | £0 | 1.5% + 20p (UK cards) | Startups and developers |
| PayPal | £0 | 1.9%-3.4% + 30p | Businesses wanting instant setup |
| Worldpay | From £19.95 | From 1.0% | Established UK businesses |
| Shopify Payments | Included in plan | 0.5%-2.0% | Shopify store owners |
Fees vary by plan and volume, so compare current rates directly with each provider before committing.
What should my ecommerce website look like?
A clean, minimal design consistently outperforms cluttered sites on conversion rates. Use only the features your customers genuinely need; every extra element slows the page and distracts from the purchase. Key design principles for a UK ecommerce site include clear product photography, a simple checkout with as few steps as possible, and trust signals such as a padlock icon, accepted payment logos, and a clear returns policy.
Mobile traffic accounts for the majority of UK ecommerce visits, so your site must work well on a smartphone before anything else. Most modern platforms apply a mobile-responsive design by default, but always test your site on a phone before launch. Page speed also directly affects your Google ranking, so avoid large uncompressed images and unnecessary third-party scripts.
How do I choose a reliable web host?
If you use a hosted platform such as Shopify or BigCommerce, hosting is included in your subscription and you do not need to arrange it separately. If you use WooCommerce or a custom solution, you will need a dedicated host. The most important metric is uptime: look for a host that guarantees 99.9% or better and publishes its uptime history publicly.
UK-based hosts including SiteGround, Krystal, and 20i offer strong uptime records and local customer support. Shared hosting is cheapest but performance can suffer during high traffic periods. A VPS (Virtual Private Server) gives you dedicated resources and is a better choice once your traffic grows.
What legal requirements do UK ecommerce businesses need to meet?
UK ecommerce businesses must comply with several legal requirements. You must display your business name, address, and company registration number if you are a limited company. Under the Consumer Contracts Regulations 2013, customers have the right to cancel most online orders within 14 days. You must also comply with UK GDPR if you collect customer data, which includes having a clear privacy policy and obtaining consent for marketing emails.
If you sell physical goods, you are responsible for VAT registration once your turnover exceeds the current threshold (£90,000 as of 2024/25). HMRC's website sets out the full obligations for online sellers.
Frequently Asked Questions
How much does it cost to set up an ecommerce business in the UK?
Costs vary significantly. A basic Shopify store costs from around £25 per month. Add a domain name (roughly £10-£15 per year), a logo, and initial stock, and you can launch a simple store for under £500. A custom-built site with professional design can cost several thousand pounds. Start with a proven platform and reinvest profits before spending heavily on custom development.
Do I need a business bank account to sell online?
Yes. You should open a dedicated business bank account before taking payments. This makes it far easier to track income and expenses for tax purposes, and most merchant account providers require a business account. Barclays, Starling, and Monzo Business all offer UK business accounts with no or low monthly fees for new businesses.
Can I sell online without registering a company?
Yes, you can sell as a sole trader without registering a limited company. You still need to register as self-employed with HMRC and complete a Self Assessment tax return each year. If your turnover exceeds £90,000, you must register for VAT regardless of your business structure.
How do I handle returns and refunds on my ecommerce site?
Under the Consumer Contracts Regulations 2013, UK customers are legally entitled to return most online purchases within 14 days of receiving them, with a refund issued within 14 days of the return. Your returns policy must be clearly stated before the customer completes their purchase. Handling returns promptly and fairly is also one of the strongest drivers of repeat business and positive reviews.
What is the best way to drive traffic to a new ecommerce site?
Search engine optimisation (SEO) provides the best long-term return, but takes time to build. For immediate traffic, Google Shopping ads and Meta (Facebook and Instagram) ads are widely used by UK ecommerce businesses. Email marketing to a growing subscriber list is consistently one of the highest-converting channels and costs very little once set up. Focus on one or two channels first and expand once you have data on what works.