How Much Does an E-commerce Site Cost: 2026 Overall Budget

An e-commerce site costs between 29 dollars a month on a solution like Shopify and 15000 euros for complex custom development, with a common budget of 3000 to 8000 euros for a medium-sized catalog developed by an agency or freelancer. The choice between an off-the-shelf solution and custom development depends mainly on the targeted sales volume and the level of customization needed, not just the entry price.

Why an e-commerce budget is the hardest to estimate upfront

Unlike a brochure site, whose scope stays fairly stable from one project to another, an e-commerce site can vary enormously in real complexity. Selling 20 simple products with no variants has nothing in common with managing a catalog of 2000 references with sizes, colors, stock synchronized across several warehouses, and international shipping.

This variability explains why publicly displayed price ranges are so wide and often not very useful without context. An honest provider always asks about product volume, planned shipping methods, desired payment methods, and necessary integrations (accounting, logistics, CRM) before quoting an e-commerce project, rather than announcing a fixed price without this information.

The second budget trap is the gap between creation cost and running cost. A solution like Shopify displays a low monthly subscription, but adds sales commissions, the cost of third-party apps that are often essential (customer reviews, upsell, advanced stock management), and sometimes transaction fees. On a large sales volume, these recurring costs can far exceed what custom development without commissions would have cost.

Off-the-shelf solution or custom development

SaaS e-commerce platforms (Shopify, WooCommerce on WordPress, PrestaShop) let you launch a store quickly, with a product catalog, a payment system, and order management already built. This is the fastest and least expensive option to get started, particularly suited to a standard catalog with no very specific business need.

Limits appear when the need falls outside the standard framework: complex pricing logic, deep integration with an existing management system, a highly differentiated shopping experience sought by the brand. In these cases, customizing a SaaS platform beyond a certain point sometimes ends up costing more and being more fragile than dedicated development.

Custom development makes sense when sales volume justifies the investment, when specific integrations are essential (internal ERP, in-house logistics, proprietary loyalty system), or when the shopping experience needs to differ strongly from what standard themes allow. The budget is higher but avoids recurring sales commissions and offers full control over the site's evolution.

The cost items of an e-commerce project

Designing the catalog and product pages. The higher the number of products and variants, the longer the initial integration (import, structuring, photos) takes, regardless of the chosen technology.

Online payment. Integrating a secure payment provider is a full technical and regulatory item in its own right, with strict security requirements (PSD2 compliance, bank data protection).

Logistics and stock. Real-time stock synchronization, out-of-stock management, connection to a carrier or warehouse: these needs add a complexity that's often underestimated at the initial quote stage.

Maintenance and security. A site that processes payments is a more sensitive target than a brochure site. Security updates, monitoring, and regular backups are not optional.

Traffic acquisition. A budget often forgotten in the initial calculation: a perfectly built e-commerce site with no visitors generates no sales. Plan a marketing budget separate from the development budget.

Hidden costs that often skew the comparison

A classic e-commerce budget trap is comparing the setup price of a SaaS solution with the overall budget of custom development, without factoring in costs that only appear after launch.

Sales commissions. Some platforms take a percentage on each transaction, on top of the monthly subscription, if you don't use their proprietary payment system. On a large sales volume, this percentage can represent a sum far greater than the initial price gap with custom development.

Essential third-party apps. A standard theme rarely covers all the real needs of a mature online store: customer reviews, loyalty program, advanced promotion management. Each additional app adds a monthly cost that, cumulatively, can double or triple the subscription budget displayed at first.

Bank transaction fees. Independent of the chosen platform, they apply to every payment collected, generally between 1.5 and 3% of the transaction amount. This cost exists regardless of the technical solution chosen and must be factored into the profitability calculation.

The cost of switching platforms. Migrating from a SaaS solution to custom development, or from one platform to another, once the catalog and order history have built up, is a project in its own right, often underestimated at the initial choice stage.

How to estimate the right budget for your project

Before requesting a quote, a few questions help frame a realistic budget: how many products do you plan to sell at launch, and in a year? Do you need to integrate your e-commerce site with an existing management system (accounting, physical in-store stock)? Is the shipping method simple (a single carrier, limited geographic area) or complex (several carriers, international, in-store pickup)?

These answers point directly to the right budget range. A catalog of 30 products with no particular integration almost always falls under a standard SaaS solution. A catalog of several hundred references with real-time stock synchronization across several sales channels generally calls for more advanced, custom, or heavily customized development.

Budget table by approach

Key takeaways

• The budget for an e-commerce site mainly depends on product volume, necessary integrations, and the level of customization, not a universal fixed price.
• A SaaS solution like Shopify is a legitimate and quick starting point for a standard catalog, with commissions to monitor over time.
• Custom development becomes relevant when sales volume or business needs justify the higher upfront investment.
• Online payment and security aren't optional: they're unavoidable cost items, whatever solution is chosen.
• The traffic acquisition budget must be planned separately from the development budget, or you risk having a functional site with no visitors.
• Comparing two e-commerce quotes means comparing the same product volume and the same level of integration, otherwise the comparison is meaningless.

Conclusion

The right budget for an e-commerce site is built from your actual product volume and targeted sales, not from a price displayed in isolation. For an e-commerce project with a catalog and payment, custom support helps precisely scope the needs before quoting; for a professional brochure site in the meantime or as a complement, VeryAppi's subscription website plan remains a solid, quick-to-launch base.