The short answer, and why it is never just one number
Asking how much an e-commerce website costs is a bit like asking how much a vehicle costs. A second-hand runabout and a fleet of refrigerated lorries are both vehicles, but they solve very different problems. An online shop can be a tidy Shopify store live in a fortnight, or a bespoke platform handling thousands of orders a day with custom logistics.
As a rough guide for the UK market in 2025, a starter store sits around £1,500 to £4,000, a serious small-to-mid business build runs £5,000 to £20,000, and a bespoke high-volume platform starts at £25,000 and climbs from there. Those are build fees, not the ongoing running costs, which we cover further down.
The honest truth is that most of the price is driven by complexity you choose, not by the agency padding an invoice. Once you understand what pushes the figure up, you can decide which features are worth paying for now and which can wait until the shop is earning.
Starter Shopify stores: £1,500 to £4,000
For most new businesses, a Shopify store on a well-chosen theme is the sensible starting point. You get hosting, security, payments, stock management and a checkout that converts well, all maintained by Shopify, so you are not paying a developer to reinvent the basics.
At this level the work is design and configuration rather than custom coding: choosing and tailoring a premium theme, setting up products and variants, connecting a payment gateway, configuring shipping zones and tax, and writing the key pages. A competent agency can deliver a polished, on-brand store in two to four weeks.
The trade-off is that you live within the theme's design and Shopify's structure. For most shops selling up to a few hundred products that is no limitation at all. It only becomes one when you need bespoke functionality the platform was never built for.
- check_circleShopify subscription from around £19 to £89 per month depending on plan
- check_circlePremium theme: a one-off £150 to £300 (or a free theme done well)
- check_circleApps for reviews, email and upsells: often £0 to £50 per month each
- check_circleTransaction fees if you do not use Shopify Payments
Growth builds: £5,000 to £20,000
Once a shop is doing real volume, the brief changes. You want a distinctive design rather than a recognisable theme, custom product pages that sell harder, and integrations that remove manual work, such as your accounting software, a warehouse or fulfilment system, or a CRM.
This is the range most established UK SMEs land in. The money buys custom front-end development on Shopify Plus or a platform like WooCommerce, conversion-focused design backed by proper user thinking, and the plumbing that connects your shop to the rest of your business so orders flow through without anyone rekeying data.
The single biggest cost driver here is integrations. Every external system you connect, every bespoke checkout step and every custom calculation adds developer hours. A clear list of what genuinely must integrate on day one, versus what is a nice-to-have, is the most effective way to keep this budget under control.
Bespoke high-volume platforms: £25,000 and up
At the top end sit fully bespoke builds, typically on a headless setup or an enterprise platform, made for businesses where the website is the business. Think large catalogues, complex pricing rules, multiple currencies and warehouses, B2B account portals, or subscription and made-to-order models.
Here you are paying for a team rather than an individual: design, front-end, back-end, integrations and quality assurance, often over three to six months. The architecture is built to handle traffic spikes and to be extended for years, which is why the investment is justified only when the trading volume supports it.
If a supplier quotes this kind of figure for what is really a straightforward shop, that is a red flag. Bespoke is the right answer for genuine complexity, not a default. Most growing businesses never need it, and reaching for it too early ties up cash that would do more good in marketing.
The features that quietly push the price up
Two shops can look almost identical and cost wildly different amounts because of what happens beneath the surface. Knowing the usual culprits helps you read a quote and spot where the hours are going.
When you brief an agency, separate these into must-have-now and phase-two. A shop that launches lean and earns money can fund its own next phase, which is almost always a healthier path than borrowing against features you are guessing customers will want.
- check_circleCustom checkout or unusual payment flows (subscriptions, deposits, split payments)
- check_circleLive stock sync with a warehouse, EPOS or third-party fulfilment
- check_circleProduct configurators, bundles and complex variant logic
- check_circleMulti-currency, multi-language or multiple regional stores
- check_circleB2B features: trade accounts, tiered pricing, quote requests
- check_circleMigrating products, customers and order history from an old platform
- check_circleBespoke design and photography rather than a templated theme
The running costs people forget to budget for
The build fee is the headline, but an online shop has ongoing costs that catch owners out. Budgeting for these from the start keeps the shop healthy rather than slowly decaying once the launch excitement fades.
Set aside a realistic monthly figure for the platform subscription, payment processing fees (typically around 1.5% to 2.9% plus a small fixed amount per transaction), apps and plugins, a domain and email, and ongoing support or maintenance. For a small store this might be £50 to £200 a month; for a larger one, considerably more.
Crucially, factor in marketing. A beautiful shop with no visitors sells nothing. Many businesses underspend on the build and then have nothing left to drive traffic, which is the wrong way round. The website is the shop floor; marketing is what brings people through the door.
How to get a quote you can actually trust
A good quote is itemised. You should be able to see what the design costs, what development costs, what each integration adds, and what is excluded. Vague single-figure quotes with no breakdown make it impossible to compare suppliers or to trim scope sensibly.
Be wary of both extremes. A price that looks too cheap usually means a rushed theme install with no thought given to conversion or speed, and you will pay again to fix it. A price that looks inflated for a simple shop suggests either over-engineering or padding. The right partner explains their reasoning in plain terms.
Before you ask anyone for a number, write down how many products you sell, which systems must connect, whether you are migrating from an existing shop, and your realistic launch budget. The clearer your brief, the more accurate and comparable the quotes you will receive.
A sensible way to think about the investment
The question worth asking is not simply how much an e-commerce website costs, but what return it needs to deliver. A £4,000 store that nets you £40,000 a year is a bargain. A £30,000 platform for a business that will never trade at that scale is money poured away.
Match the build to the stage you are at. Start lean if you are testing a market, invest properly once demand is proven, and only go bespoke when genuine complexity demands it. Spend the savings on traffic and on getting the customer experience right, because those are what actually move the numbers.
At Pro Digital Labs we scope each build around what the shop needs to earn, not around the most expensive thing we could sell you. That approach keeps the initial outlay sensible and leaves room in the budget for the marketing that makes the shop pay for itself.
Frequently asked questions
Is Shopify or a custom build cheaper to run?expand_more
Shopify is almost always cheaper to run because hosting, security, updates and the checkout are all handled for you, so there is no developer to keep the basics working. A custom build can have lower platform fees but higher maintenance and hosting costs, which only make sense at high volume or genuine complexity.
How long does it take to build an e-commerce website?expand_more
A starter Shopify store typically takes two to four weeks. A growth build with custom design and integrations runs roughly six to twelve weeks. A bespoke high-volume platform usually takes three to six months. Migrating an existing shop's products and order history adds time at every level.
Why are some e-commerce quotes so much higher than others?expand_more
Almost always because of what sits beneath the surface: custom checkout flows, live stock sync, multi-currency, B2B accounts and bespoke design all add developer hours. A higher quote is not automatically worse value, but you should expect an itemised breakdown so you can see exactly where the money goes.
Can I start small and upgrade later?expand_more
Yes, and for most new businesses that is the wisest route. A lean Shopify store can launch quickly, start earning, and fund its own next phase. Choosing a flexible platform from the outset means you can add features as demand proves itself rather than paying upfront for things customers may never use.
What ongoing costs should I budget for after launch?expand_more
Plan for the platform subscription, payment processing fees of roughly 1.5% to 2.9% per transaction, any paid apps or plugins, a domain and email, and ongoing support. Critically, budget for marketing too, because traffic is what turns a finished shop into a paying one.