How much does a custom web app cost in Serbia in 2026?

A custom web application in Serbia in 2026 costs from €3,000 for an internal tool or a single-process system to €15,000 and up for a platform with billing and several types of user. The price does not depend on the number of pages but on the logic behind them: who uses the system, what each of them may do, and what it connects to.

A web application is a system that runs in the browser, not a company brochure. Users sign in, enter and change data, and the application does something with that data. Dashboards, client portals, booking systems, internal tools and SaaS products are all web applications.

Web application prices by scope (2026)

These are ranges, not fixed line items. The exact price is set after a conversation about what the system needs to do, because the scope of projects like these cannot be judged from a short description.

Internal tool or single-process system: €3,000 - €6,000

One clear job that is done today in Excel, on paper or over messages: work orders, appointment booking, order tracking, a quote calculator or reports for management. There are few types of user, usually employees and an administrator.

This is the fastest route to a return on the investment, because the system replaces manual work that already costs something every day. If you can describe the process on one sheet of paper, it probably belongs here.

System with several roles and integrations: €6,000 - €15,000

A client portal, a custom CRM, bookings with card payment, or B2B ordering for partners. Different types of user see different data and have different rights, and the system connects to what you already use: accounting, a warehouse, a courier service or a payment processor.

Integrations are what most often moves the price. Every connection to an outside system has to keep working when the other side is slow or returns an error. That work is invisible on screen, but you notice the moment it is missing.

Platform or SaaS with billing: from €15,000

A product used by other companies or by a large number of people: subscriptions and billing, several organisations in one system, roles and permissions on several levels, reporting and a public API.

Here it almost always pays to start with a first version that solves one problem well for one type of user, then widen the system once you can see what is actually used.

Web applications we have built

Unitvia is a property platform: landlords and tenants each get their own login, and rent collection runs automatically in the background.

iCan Education is used daily by 15 schools across Canada, with AI built into the coursework itself, giving students a genuinely new way to learn.

What affects the cost of a web application

• The number of user types and the rights each one has
• The number of processes the system covers
• Integrations: payments, accounting, warehouse, couriers, other systems through their APIs
• Moving existing data out of Excel or an old system
• Reports, exports and dashboards
• Security and data retention requirements
• Whether the same system also needs a mobile app

Custom web application or off-the-shelf software?

Off-the-shelf software is cheaper at the start and is often enough. If a tool covers most of your process and you can adapt the rest, start there.

A custom application pays off when the process is what sets you apart from competitors, when licences for the whole team start to cost more than a build, or when ready-made tools do not connect to what you already use. Then you pay once for a system that is yours, instead of spending months adapting to a system built for someone else.

Costs after launch

The build price does not include the cost of running the system. Plan for these from day one:

• Server and database: from a few to a few dozen euros a month for most business systems
• Domain: about €10-20 a year
• Paid services: sending email and SMS, maps, AI, a payment processor
• Maintenance: updates, security, backups and fixes
• New features, once the system is in use and shows what is missing

What a web application quote should contain

For a custom system the quote is also the description of what you are building. Without the following, two quotes cannot be compared fairly.

• The roles and what each one may do
• The processes the first version covers, and what is left for later
• Which integrations are included in the price
• Who owns the code, the server and the data
• A timeline by phase, and what is handed over at the end of each
• The price of maintenance and new features after launch

How much does a web application cost with Father of Web?

Custom web applications start from €3,000 with us. We set the price after a conversation about what the system needs to do, and the quote you receive does not change once it is agreed.

The code, the server and the accounts belong to you, so the system stays yours regardless of who maintains it later. How we build websites and custom systems is on the web development page.

Frequently asked questions about web application cost

What is the difference between a website and a web application?

A website mainly displays content, while a web application works with user data: sign-in, input, processing and reports. That is why a website is priced by pages and design, and an application by logic and integrations.

How long does it take to build a web application?

A single-process system usually takes 6 to 10 weeks, a system with several roles and integrations 2 to 4 months, and platforms longer. The most time is saved when the first version is clearly limited.

Can I start with a smaller version?

Yes, and we recommend it. The first version covers the most important process, and the next features are added once you can see how the system is really used.

Who owns the code and the data?

You do. The server, the database and the accounts are in the name of your company, and the code is handed over with the project. That way the system stays yours regardless of who maintains it later.

Does a web application work on a phone?

Yes, a well-built web application works in the browser on a phone. If users need offline access, push notifications or the camera, a mobile app that uses the same backend is worth it too. The prices for that are in the guide how much a mobile app costs.

Do I pay everything up front?

No. Payment comes in instalments tied to phases: a deposit at the start, part after the design is approved, and the remainder before launch. The exact split is agreed before we begin.