A custom web application usually costs from around 80,000 to 250,000 CZK for a simple internal tool or MVP, roughly 450,000 CZK and up for a portal or dashboard with accounts and integrations, and from 500,000 CZK into the millions for a full SaaS platform. In global terms that is about $25,000 to $40,000 for a simple app and $150,000 or more for a complex one. The spread is wide because a web app is defined by its logic, not its look.
The first thing to get straight is what you are actually buying, because it is the single biggest reason web apps cost more than people expect. This guide separates a web app from a website, then gives honest price tiers, the drivers that move the number, and the ongoing costs most quotes leave out.
A simple web app or MVP (internal tool, light admin) runs roughly 80,000 to 250,000 CZK. A medium app (customer portal or dashboard with accounts, roles, and integrations) runs from about 450,000 CZK. A complex or multi-tenant SaaS platform runs from 500,000 CZK into the millions. On top of the build, budget hosting (low hundreds of CZK to thousands per month) and 15 to 25% of the build cost per year for maintenance. The price follows the logic, data, and users the app handles, not the number of screens.
Website vs web application: what is the difference?
This distinction sets the whole budget. A website is presentational: it shows information, text, images, video, and its job is to inform or promote. A web application is interactive: people log in, enter data, process orders, generate reports, and act on results. A website has pages; a web app has logic, a database, and users.
That is why a web app costs several times what a brochure website does. You are not paying for pages. You are paying for the rules, the data model, the accounts and permissions, and the integrations that make the thing actually do work. When someone quotes a web app like a website, that is the misunderstanding to catch early.
How much does a web app cost by complexity?
Here is a realistic tiered view. Treat these as ranges: the Czech market varies between agencies, and the real number depends on the drivers below.
Tier | What it is | Czech market (CZK) | Global (USD) |
|---|---|---|---|
Simple / MVP | internal tool, light admin, few roles | ~80 000 to 250 000 | $25,000 to $40,000 |
Medium | portal or dashboard, accounts, roles, integrations | from ~450 000 | $60,000 to $150,000 |
Complex / SaaS | multi-tenant, real-time, heavy integrations | 500 000 to several million | $150,000 and up |
Sources: Czech tiers from Think Easy and DevBoys; global tiers from Cleveroad. This is the web-app-specific view; for the broader picture across all software see our custom software cost guide, and for apps on phones the mobile app cost guide.
What actually drives the cost of a web app?
A web app is priced by effort, and these are the features that add the most:
- User roles and permissions. One user type is simple. Admins, managers, and customers each seeing different things is real work.
- The admin panel. Someone has to manage the data behind the app. A proper admin interface is often a third of the build.
- Integrations. Every connection to your accounting, CRM, payment gateway, or a third-party API adds effort.
- Backend and data model. How the data is structured, validated, and related is where the real complexity lives.
- Real-time features. Live updates, messaging, and notifications cost more than a page that refreshes.
- Multi-tenancy. If it is a SaaS serving many separate customers from one system, that architecture is a step up in cost.
Custom design adds on top, often quoted per screen. Notice none of these are about how the app looks. They are about what it does.
The ongoing costs to budget from day one
The build is one-time. Running the app is not:
- Hosting and cloud. From low hundreds of CZK per month for a small app to more as usage grows. Global guides put it at $100 to $500+ per month.
- Maintenance. Plan for 15 to 25% of the build cost per year to keep the app secure, current, and improving.
- Third-party subscriptions. Payment processing, email, authentication, and similar services bill separately and add up.
This is why the build price alone is not the real cost. Look at the total over a few years, the same total-cost-of-ownership logic behind why custom software beats SaaS: you own the app and pay no per-seat fee, so it gets relatively cheaper as more people use it.
Start with an MVP
The single best way to control the cost of a web app is to not build all of it at once. Start with a minimum viable product: the smallest version that solves the core problem for real users. You learn what people actually use, you get value in weeks instead of months, and you avoid paying to build features nobody needed. Then you grow the app on evidence. A good partner will push you toward this, not away from it, because it lowers your risk and the bill.
Frequently Asked Questions
How much does it cost to build a simple web app or MVP?
A simple web app or MVP, such as an internal tool with light admin, typically runs from around 80,000 to 250,000 CZK (roughly $25,000 to $40,000 globally). The price depends on how many user roles and integrations it needs.
What is the difference between a website and a web application?
A website presents information: text, images, pages to read. A web application is interactive: users log in, enter data, process transactions, and get results back. A web app has logic, a database, and users, which is why it costs several times more than a brochure website.
How much does it cost to build a SaaS platform?
A multi-tenant SaaS web app is at the complex end, from around 500,000 CZK into the millions (roughly $150,000 and up globally), because it serves many separate customers from one system and usually needs real-time features, integrations, and a robust admin side. Starting with an MVP keeps the first version far lower.
What drives web application development cost?
User roles and permissions, the admin panel, integrations with other systems, the backend and data model, real-time features, and multi-tenancy. Custom design adds on top. Cost follows what the app does, not how many screens it has.
How much does it cost to maintain a web app per year?
Budget 15 to 25% of the build cost per year for maintenance, plus hosting (low hundreds of CZK to thousands per month) and any third-party service subscriptions. Maintenance keeps the app secure and current and funds small improvements.
Is it cheaper to hire a freelancer or an agency?
A freelancer usually has a lower hourly rate but limited capacity and no backup. An agency or team costs more per hour but carries the project, covers more skills, and keeps running when one person is away. For anything business-critical, the reliability usually justifies the higher rate.
The bottom line
A web application costs what its logic costs. A simple internal tool starts around 80,000 to 250,000 CZK; a full SaaS platform runs into the millions. The number is driven by roles, data, integrations, and real-time behaviour, not by page count, and the real figure is the total over a few years once you add hosting and maintenance. Start with an MVP, own what you build, and grow it on evidence.
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