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TB Development

Pricing/Custom business application development

How Much a Custom Business Application Costs (2026)

A custom business application starts at €800 for a single module. Paid once, not monthly per seat.

What each figure buys

One module

from €800

For one part of the business currently living in spreadsheets and email that deserves its own place.

  • One self-contained part of the work
  • Entry, overview and search
  • Up to three users
  • Export to Excel or PDF
  • Support for the first 30 days

Done in 3 – 5 weeks

Application with accounts

from €1,500

For a team or clients who log in and see only their own slice of the data.

  • Login and access levels
  • Several connected modules
  • A record of who changed what
  • Connected to your existing tools
  • Dashboard with the numbers that matter

Done in 6 – 10 weeks

Platform

from €2,500

For a business that lives inside the application: orders, stock, documents and reports in one place.

  • Several modules sharing data
  • Integrations with business software and payments
  • Migration of existing data
  • A desktop part where that fits
  • Team onboarding

Done in 3 – 5 months

Six things that move the quote up

  1. 01

    01Number of roles

    An application where everyone sees everything is simple. The moment a manager, a staff member and a client see different things, every screen has three versions.

  2. 02

    02Integrations

    Accounting, e-invoicing, payments, shipping. Every connection to someone else's system is work to wire up and test at the edges.

  3. 03

    03Migrating old data

    Years of history in the old system don't move themselves. Transferring it and verifying nothing fell out is a separate piece of work.

  4. 04

    04Reports

    Listing data is easy. A report that answers a business question requires first agreeing exactly what is being measured.

  5. 05

    05Field use

    If the application is used away from the office it has to keep working when the connection drops, which means reconciling data afterwards.

  6. 06

    06Regulatory requirements

    Fiscalisation, e-invoicing, personal data handling. Not hard, but real work, and it has to be right.

Three things that come with the job

You own the code

The application is yours. No per-seat licence growing with the team, and no system you can't walk out of with your data.

Works on a phone

If it is used in the field or in a warehouse, it works on a phone. That isn't a separate product, it's part of the same job.

Data export

The data is yours and has to come out to Excel or PDF whenever you need it, without asking us.

When custom beats a subscription

Off-the-shelf SaaS is faster and cheaper at the start, and for most standard work it is the right call. Custom pays off when the business doesn't fit someone else's mould, when the subscription grows with headcount, or when you pay for ten modules to use two. The arithmetic is simple: subscription × people × 36 months, then compare.

Cost over three years

Off-the-shelf SaaSA per-seat subscription every month, growing with the team.

Custom applicationPaid once. The tenth user costs the same as the first, which is nothing.

How the work is done

Off-the-shelf SaaSThe work bends to the tool, because the tool was written for the market average.

Custom applicationThe tool bends to the work, including the exceptions only you have.

The data

Off-the-shelf SaaSLives with the provider. Getting it out is possible, on their terms.

Custom applicationLives in your database and comes out whenever needed.

When a change is needed

Off-the-shelf SaaSYou file a feature request and wait. It may arrive, it may not.

Custom applicationYou order the change and it gets built.

When the price changes

Off-the-shelf SaaSThe subscription goes up, and the business already depends on the tool.

Custom applicationThere is no subscription to go up.

Common questions about business application cost

If an existing product covers your work, buy the existing product — we will tell you so. Custom pays off when the business doesn't fit someone else's mould, when the subscription grows with headcount, or when you pay for ten modules to use two.

One module, three to five weeks. An application with accounts, six to ten weeks. A platform, three to five months, depending on integrations and how much old data has to move.

It moves across. That is a separate part of the job and includes verifying nothing fell out, because a quiet hole in the history only shows up six months later.

No. The price is tied to the project, not to headcount. The tenth user costs nothing extra.

The first 30 days are free. After that there's monthly maintenance, priced by the size of the application. It isn't mandatory; the application runs without us.

Yes, if it is used away from a desk. If it is only used at a desk, it is built for desktop and the budget isn't spent on something nobody will open on a phone.

That is the recommendation. Build the module that hurts most, run it for a month, then decide what comes next based on real use rather than a guess.

Let's talk for ten minutes.

Or we drop by, whatever suits you. We look at what's eating your time and tell you honestly whether software is worth it.