Ask five agencies what a web application costs and you will get five versions of “it depends on the project”. The truth is the market has fairly clear price bands — nobody just wants to say them out loud.
Three bands that hold in 2026
An internal tool (records, approvals, a simple workflow) runs €15,000–35,000. A production MVP with sign-in, roles and one external integration costs €42,000–68,000. A platform serving thousands of users with an SLA and audit trail starts at €90,000. Senior hourly rates in Slovakia: €65–110.
These numbers assume a senior team and a fixed scope. If someone offers you an MVP for €12,000, you are getting either a template or a junior — and you will pay the difference later, with interest.
Three items missing from most quotes
First: deployment and DevOps — pipelines, monitoring and backups make up 8–12 % of the budget. Second: maintenance — plan for 15–20 % of the build price per year. Third: content and data migration, which the client “will handle themselves” and which then eats three weeks of the project.
The best defence? Ask for a fixed price with defined KPIs and a public price list. Whoever hides their numbers usually has a reason.