One of the most common questions we hear before any ecommerce project kicks off is: what is this actually going to cost? The honest answer is that ecommerce development costs vary enormously — but that's not helpful when you're trying to plan a budget.
This guide gives you realistic UK price ranges for different types of ecommerce projects, explains what drives costs up or down, and helps you approach agencies with the right expectations.
Typical ecommerce development costs in the UK (2026)
| Project type | Typical UK cost range | Best for |
|---|---|---|
| Small ecommerce site (up to 100 products, WooCommerce) | £5,000 – £15,000 | Startups and SMEs entering ecommerce |
| Mid-size store (bespoke design, integrations, WooCommerce/Shopify) | £15,000 – £50,000 | Growing businesses needing performance and flexibility |
| Large/complex store (custom platform, ERP/CRM integrations, Magento) | £50,000 – £200,000+ | Established businesses with complex catalogue or B2B requirements |
| Bespoke ecommerce platform (fully custom-built) | £100,000+ | Businesses whose requirements cannot be met by existing platforms |
These are guide ranges based on UK agency rates. Offshore development may quote lower figures but typically carries higher long-term costs through quality issues and communication overhead.
What affects ecommerce development costs most?
1) Platform choice
WooCommerce is generally the most cost-effective option for SME ecommerce. Magento (Adobe Commerce) costs significantly more to build and host but offers greater enterprise capability. Shopify reduces development time but introduces ongoing platform fees and limits customisation. Fully bespoke builds are the most expensive upfront but offer total control.
2) Catalogue complexity
A store with 50 simple products is very different from one with 5,000 SKUs, complex variants, configurable pricing, and bulk import requirements. The more complex your catalogue structure, the more development and testing time is required.
3) Custom functionality
Every feature beyond the platform default adds cost: custom checkout flows, subscription billing, loyalty programmes, trade account pricing, product configurators, and integration with fulfilment systems. Each one needs scoping, building, and testing.
4) Design quality
Template-based designs reduce cost significantly. A fully bespoke, conversion-optimised design built around your brand and user journey takes longer and costs more — but typically delivers better commercial results.
5) Integrations
ERP, CRM, stock management, payment gateways, and email marketing integrations all require development time. API-based integrations are often straightforward; legacy systems can be considerably more involved.
Ongoing ecommerce costs to plan for
- Hosting: quality ecommerce hosting costs £100–£500+/month depending on traffic and requirements
- Platform/plugin licences: WooCommerce extensions and Magento licences add recurring cost
- Maintenance: security updates, plugin updates, bug fixes — typically £150–£600/month
- Development retainer: ongoing improvements, new features, seasonal changes
- Payment processing fees: Stripe, PayPal, and similar charge per-transaction fees
How to get an accurate quote
Before approaching agencies, define your core requirements: primary goal (revenue, leads, B2B orders), platform preference, catalogue size, key integrations, and any hard deadlines. Agencies who receive a thorough brief provide more accurate — and more comparable — quotes.
Be cautious of quotes that come back within hours of a first conversation. A proper scoping process takes time and produces a quote you can hold someone to.
Get a realistic ecommerce development quote
We'll review your requirements and give you a clear cost estimate — broken down by phase, with no surprises built in.