Custom Software Cost: What You Actually Pay in 2026

What does custom software cost in the Netherlands in 2026? The short answer: between €15,000 and €500,000, depending on what you're building and who builds it. The long answer — why the spread is so wide, when custom software is worth it, and how to avoid surprises — is below.

We're writing this as a software vendor. That's a form of bias, but also of expertise: we've put out hundreds of quotes and shipped projects. We also regularly say no to clients who'd be better off with a SaaS tool at €50/month. This article tries to be honest about both sides.

The three typical price ranges

Important: these prices are based on average EU rates. Ultimately, cost depends on the following factors.

What drives the price?

Five factors together explain 80% of the price variation. If you understand these, you can judge a quote better.

1. Number of integrations with existing systems

Building the system itself is often not the most expensive part. Connecting it to your ERP, CRM, your data warehouse, your document management, your DMS, and your customers' tools — that's where projects derail in time and cost. A custom app that runs fully standalone is much cheaper than the same app having to integrate with five existing systems.

2. Level of personalisation per user/customer

An internal tool for one team is much cheaper than a SaaS product with multi-tenant architecture, white-labeling per customer, and role-based permissions per tenant. Plan for 2–4× the base build cost for a real multi-tenant platform.

3. Compliance and security requirements

GDPR, ISO 27001, NEN 7510, EU AI Act — every regulatory requirement adds work: documentation, audit trails, encryption, access management, external penetration tests. Business-critical software in healthcare, finance or government costs at least 30% more than the same functionality for less regulated sectors.

4. Who's building

Experienced senior engineers in the Netherlands cost €1,000–€1,500 per day. Mid-level: €700–€1,000. Junior: €450–€700. Offshore: €100–€300. Cheaper isn't always more expensive, but for custom work it often is — a senior builds 5–10× faster than a junior on complex code, and the quality differs enormously.

5. What happens after go-live

Software isn't a project, it's a living product. Plan for 15–20% of the build cost per year for maintenance, small enhancements, security updates and hosting. Whoever leaves this out of the calculation will discover in year two that the software is slowly degrading.

AI has lowered costs — just not for what you think

You can't write about software cost in 2026 without mentioning AI. The picture is more nuanced than the hype suggests.

The good side: for simple tools — an internal dashboard, a form workflow, a proof-of-concept, an MVP for one team — prices have actually come down. With AI assistance an experienced engineer can stand up in a few days what used to take three weeks. Discovery prototypes in the €5K–€25K range often land at the lower end now. That's a real saving.

The other side: vibecoding — rolling out a whole app from a chatbot with no real engineer in the loop — is not an alternative to production software. Not in 2026, not for systems your business depends on. We see the wreckage every week: prototypes that work in a demo and fall over in production, code with no tests, security holes you could drive a truck through, integrations that break the first time the external API changes, no logging, no monitoring, nobody who understands why something fails.

In practice this shifts the price ranges, but it doesn't erase them. An MVP now lands €25K–€60K instead of €40K–€100K when the scope fits what AI is good at (CRUD, forms, simple integrations). Full production platforms are still in the same range — that work isn't typing code, it's architecture, observability, scalability and the dozens of edge cases you don't see in month one.

Custom vs SaaS: when is it worth it?

Not always — and AI has shifted the balance. Many processes that were too expensive to touch in 2023 can now be built custom within a reasonable budget. We see clients who previously chose SaaS because custom didn't pay back, who can now sensibly build — especially for internal tools where the existing SaaS fits poorly. At the same time, Notion, Airtable, or a specialised SaaS solution still works perfectly fine for €100/month in many cases. The rule of thumb:

Custom software pays off in these situations:

• The process is unique to your business and is a key part of what makes you good.
• You already pay more than €30K/year in SaaS licenses that only partly fit.
• Existing tools force you into a way of working you explicitly want to change.
• You have integration requirements no SaaS vendor will ever build.
• Your data or processes can't leave your infrastructure for compliance reasons.

Custom software usually doesn't pay off when:

• You mostly want a better user interface for a standard process.
• The process could look completely different in two years — then you're buying twice.
• You don't have a team to maintain the software after go-live.
• The use case is solved by combining two existing SaaS tools.

How to avoid surprises

The most painful price surprises don't come from a vendor doing their job badly, but from scope changing during the project and nobody communicating it loudly enough. Four practical steps that make our work transparent:

1. Start with a paid discovery (€5K–€15K, 1–3 weeks). This forces everyone to put scope on paper before any code is written. With us it's a fixed price and produces a written recommendation with scope, options and realistic timelines.
2. Ask for a fixed-price quote on the defined scope. No open-ended hourly billing. If scope changes, there's a formal change request — not silently more hours.
3. Schedule monthly demos. Not at the end, but every month. If something isn't right, that rhythm forces a conversation — and that's cheaper than discovering after six months that you have the wrong product.
4. Ask explicitly about IP, code ownership and exit procedures. Who owns the source code? How is the handover arranged? What if you want to continue with a different team a year from now? The good vendors find these questions normal.

Our rates

We publish all our rates on the pricing page, precisely because so many vendors don't. Discovery starts at €5K, build projects usually run between €25K and €200K, partnership rates start at €8K/month. We're not the cheapest — not as a matter of principle, but because the people we put on projects are experienced senior engineers.

What you don't get from us at that price: junior engineers learning on your project, a sales process that takes six weeks before you get a first answer, or a quote without clear scope. What you do get: a team that puts your system into production — not into a slide deck.

Have a specific project in mind and want a first indication? Tell us in a few sentences what you want to build via our contact form. We respond within one business day with a ballpark price or an invitation for a discovery — depending on what fits.