What does a custom web system cost?

Scope and number of features are the most obvious factor: a website with five pages is a different thing from a booking system with a calendar, payments, and user roles. Every feature means conception, development, and testing — and the more precisely you can describe upfront what the system should do, the more precise the quote will be.

Integrations with third-party systems are often the biggest cost driver. If your web system needs to talk to inventory management, a payment provider, accounting software, or external APIs, that creates effort for interfaces, error handling, and testing with real data. A clean integration is doable, but it is rarely done “on the side”.

Data migration is regularly underestimated. Existing customer data, products, or bookings from legacy systems, spreadsheets, or paper archives have to be cleaned, structured, and transferred. The messier the starting point, the more time goes into this step.

Design and interface, finally: a simple, clear implementation based on proven patterns is significantly cheaper than a fully custom screen design with animations and special solutions. Both can be right — it is a question of priorities.

Billing by effort sounds flexible, but it shifts the entire risk onto you: if something takes longer, you pay. A written fixed-price quote, by contrast, forces both sides to clarify before the project starts exactly what will be built — and that clarification is often the most valuable part of the project.

Serious fixed prices do not come out of thin air. They require a requirements discussion in which scope, integrations, and priorities are put on the table. Afterwards you receive a quote with a fixed price and a clear timeline — and you know where you stand before the first invoice.

A professional company website — concept, design, development, SEO foundation — typically starts in the low four-figure range. Webshops and custom web systems are quoted individually after a short requirements discussion, because scope and integrations vary too much to state serious flat numbers.

Beware of two extremes: quotes that are suspiciously cheap usually cut corners on conception, testing, or maintainability — and you pay for that twice later. And providers who refuse to name a fixed price are transferring the project risk to you. The instrument of choice is a concrete, written fixed-price quote after a real conversation about your requirements.

You do not need technical knowledge — but good preparation saves time and money. Four things help:

First: describe the process, not the technology. “Our customers book appointments by phone, which costs us two hours a day” is a better requirement than “we need a React frontend”. Second: name existing systems — inventory management, spreadsheets, newsletter tool — because every integration affects the price.

Third: set priorities. What must the first version absolutely be able to do, what can come later? And fourth: talk openly about your budget. A serious provider will then tell you honestly what is possible within that range — and what is not. That is exactly how a quote you can rely on comes about.