A custom web application in Belgium typically costs €5,000–€15,000, scoped to its features. A marketing site starts at €2,000, and a website with the brand to carry it runs €3,500–€12,000. At YNK Studios every project is a fixed price, agreed before a line of code is written.
Website or Web App — Which Do You Actually Need?
The word "website" hides a wide range. On one end is a marketing site: pages that present your business, load fast, rank, and turn visitors into enquiries. On the other is a web application: software that runs in the browser, with accounts, dashboards, data and logic behind it. The price gap between them is large, so naming the right one is the first money-saving decision you make.
A useful test: if the value is in reading — people learn about you and get in touch — you need a site. If the value is in doing — people log in, enter data, and the product does work for them — you need a web app. Many Benelux businesses start with the first and add the second as they grow.
MoveMax is a concrete example of the second kind. It is a competitive fitness platform with accounts, role-based access, leaderboards and 107 interface components — real software, not a brochure. That is where a build moves from a few thousand euros into web-application territory.
Custom Web App Cost in Belgium, by Tier
Pricing tracks the work, and the work tracks complexity: how many features, how much custom logic, how many systems it must talk to. These are the tiers we quote from, with the ranges most Benelux projects land in.
- A fast, responsive site built to convert
- Custom design — never a template
- SEO foundations: structured data, sitemaps, performance
- CMS where you need to edit content yourself
- Two revision rounds included
Best for: A business that needs a credible digital presence and a steady stream of enquiries.
- Accounts, authentication and role-based access
- Dashboards, data and real-time features
- APIs and integrations with the tools you run
- Built with Next.js and React for speed and reach
- All source files and handover docs on delivery
Best for: A product that people log in to and use — where the software does the work, not just the showing.
- Multi-feature platforms and marketplaces
- Product catalogues, checkout and payments
- A security review before you take real money
- Designed to scale with the business
Best for: Commerce and multi-sided platforms where the product is the operation.
Our prices put studio-grade engineering at the level a local agency charges for far less ambitious work. You get senior hands from the first commit and a fixed quote — not an open meter that grows every week.
What Drives the Price Up (or Down)
A web-app quote is never arbitrary. Each factor below maps directly to engineering hours — so understanding them lets you decide where to invest and where to simplify.
- Number of features — Every distinct thing a user can do is design, build and test time. A focused first version with three core features ships faster and for less than one that tries to do everything at launch. Scope the few that matter; add the rest once they earn their place.
- Custom logic and data — A form that sends an email is simple. A system that calculates, validates, and enforces rules across many records is not. The more your product has to think, the more the engineering behind it costs.
- Integrations — Each external system — a payment provider, a CRM, a booking tool, an accounting package — is its own piece of work. Two or three are routine; a dozen is a project in itself. List them early, because they shape the architecture.
- Accounts and access control — The moment people log in, you need authentication, permissions and an audit trail. Role-based access — where an admin sees more than a member — is standard for real software and adds real, worthwhile hours.
- Design ambition — A clean, sharp interface is the baseline. Bespoke interactions, animation and a fully custom design language are worth it for a flagship product — and they are a line item, not a free extra.
What a Fixed-Price Build Includes
Every project we quote is fixed in price, scope and delivery date. Here is what that covers, so you can compare like for like when you talk to anyone else.
- A clear, fixed quote — Defined deliverables, one price, agreed before we start. No hourly meter, no surprise invoice.
- Senior hands from the first commit — The person who scopes your project is involved in shipping it. No account managers, no juniors learning on your budget.
- Two revision rounds — Built into every quote. You review, we sharpen, until the detail is right.
- SEO and performance built in — Structured data, sitemaps and fast loads are part of the build, not an upsell after launch.
- All source files and handover docs — On delivery you own everything. We can talk hosting and support once you are live — but you are never locked in.
How to Scope It Well
The biggest lever on cost is not the day rate — it is how clearly the work is defined. These five habits protect your budget and sharpen the result.
- 01
Name the one job the product must do
Write the single outcome that makes the project worth doing. Every feature either serves it or waits. A focused first version beats a bloated one, every time.
- 02
List your integrations up front
Payments, CRM, booking, accounting — name them before the quote. They shape the architecture, and finding them late is the most common cause of scope creep.
- 03
Separate launch from later
Sort features into "needed to launch" and "can follow". You get to market sooner and spread the cost across releases that have already proven their worth.
- 04
Decide who logs in
Map the kinds of user and what each may do. Access control costs far less designed in at the start than retrofitted once the product is live.
- 05
Ask what you own on delivery
Confirm you receive all source files and documentation. They are your property — you will need them for hosting, future work and peace of mind.
Frequently Asked Questions
How much does a custom web application cost in Belgium?+
A custom web application typically costs €5,000–€15,000 as a fixed-price build, depending on the number of features, the complexity of the logic, and the integrations required. A marketing site starts at €2,000, and a website with a full brand identity runs €3,500–€12,000.
What is the difference between a website and a web app?+
A website presents your business — pages people read before getting in touch. A web app is software that runs in the browser, with accounts, dashboards, data and logic. The value of a site is in reading; the value of an app is in doing. Web apps cost more because there is real software behind them.
Which technologies do you build with?+
We build primarily with Next.js and React for fast, SEO-friendly web products, and choose the right stack for any desktop, mobile or e-commerce layer on a per-project basis. We pick what serves the outcome, not the trend.
How long does a web app take to build?+
A marketing site is typically 2–4 weeks. A web application runs 4–8 weeks depending on scope. Larger platforms and e-commerce builds are scoped per project. You receive a clear timeline with your fixed quote before we begin.
Do you work with clients across the Benelux?+
Yes. We are a Benelux studio with a real registered Belgian entity — a verifiable address, a VAT number, a person who answers — working with clients across Belgium, the Netherlands and Luxembourg.
Do I own the code when it is finished?+
Yes. Final delivery includes all source files and handover documentation. You own the work outright. We are happy to talk hosting and ongoing support, but you are never locked in.
Let's Build Your Web App
Tell us what you are building. You will hear back within 24 hours with a clear scope and a fixed-price quote — no surprises.