How Much Does an Online Store Cost? Platform, Scope and Total Cost of Ownership

Two quotes for the same store can differ tenfold and both can be honest. The difference is almost never the design. It is the catalogue model, the integrations, and who carries the running cost after launch. Before comparing numbers, make sure the offers describe the same system.

What the Number Actually Covers

A store budget splits into four parts that behave very differently over time. Treat them separately or you will compare a one-off build against someone else's subscription model.

• Build: design, implementation, catalogue setup, content migration.
• Platform: licence or subscription, plus transaction fees on some platforms.
• Integrations: ERP, warehouse, accounting, courier and payment providers.
• Operation: hosting, monitoring, updates, and the person who fixes things.

What Drives the Build Cost

Catalogue complexity dominates. A hundred simple products with one price cost a fraction of thirty products with variants, unit conversions, volume pricing and per-customer discounts. B2B stores are usually the second kind.

Cost multipliers to check early

• Product variants and configurable options, especially when they affect price.
• Customer-specific pricing, contract prices, and net versus gross presentation.
• Stock synchronisation frequency and what happens when the source system is down.
• Multi-currency and multi-language, which multiply content work, not just labels.
• Approval flows: quote requests, order limits, purchase approval by a supervisor.

Where Budgets Get Wasted

The most common waste is building custom what the platform already does, and hand-building what should have been an integration.

• A bespoke checkout when the standard one converts fine after minor changes.
• Manual product import that has to be repeated every month by a person.
• A separate admin panel duplicating what the ERP already stores.
• Design work on pages nobody visits, before the category pages convert.

If a feature does not shorten the path to an order or remove manual work, it belongs in a later phase.

Total Cost of Ownership Over Three Years

Ask every vendor for the three-year picture, not the launch price. Subscription platforms front-load convenience and back-load fees, especially with transaction percentages. Custom builds front-load cost and back-load flexibility.

1. 1Add up licences and transaction fees at your realistic order volume.
2. 2Add hosting, monitoring and a maintenance retainer with a defined response time.
3. 3Add the cost of two or three changes per year that you can already predict.
4. 4Compare that total, not the first invoice.

A Sensible Way to Phase It

Launch the smallest store that can take a real order, then extend. In practice that means one catalogue structure, one payment method, one delivery method, and the integration that removes the most manual work.