"How much would software for this cost me?" is the first question from almost every company considering a custom build. The honest answer starts with "it depends", but it depends on concrete, measurable factors, not on the supplier’s magic wand. This is the no-hype guide to what custom software costs in 2026 and why.
Why nobody gives you a fixed price over the phone
When you ask the price of a car, they tell you a figure. When you ask the price of custom software, they say "I need to understand the project first". It is not a sales evasion: it is that "custom software" is not a product, it is a category. Just as "constructing a building" can mean a garden shed or a hospital.
The price depends on how many screens it has, how many types of user, which systems it integrates with, how much data it moves, what level of reliability it demands and how far it has to scale. Anyone who gives you a number without asking any of this is either inventing it or has already decided to cut corners somewhere you do not yet know about.
Real ranges by project type (2026, Spanish market)
With that warning up front, these are the orders of magnitude you will see in the Spanish market for custom development with a professional team. They are not rate cards: they are ranges so you can calibrate expectations before the first meeting.
Working MVP · €8,000 – 25,000
A real minimum viable product: a bounded idea, a couple of user flows, authentication, a database and a basic dashboard. Enough to validate with real customers or to go to market with the essentials. It is not a throwaway prototype; it is a first version you build on. Typical timeline: 4–10 weeks.
Internal application / operations tool · €20,000 – 60,000
Software that replaces that monstrous spreadsheet or that manual process eating hours: order management, planning, project tracking, dashboards. Several roles, real business logic, integration with one or two existing tools. It is the range where most companies get a clear return, because it attacks a measurable pain.
SaaS platform or customer-facing product · €50,000 – 150,000+
A product you sell to third parties or that is the core of your business: multi-tenant, billing, different plans, hardened security, high availability. Here the cost rises not because of the screens, but because of everything you do not see: scalability, observability, support, compliance.
Integrations and applied AI · €6,000 – 40,000 per module
Connecting systems that currently live in isolation, or adding AI agents and process automation on top of what you already have. The range is wide because it depends entirely on the state of the current systems and the quality of the available data.
The seven factors that really move the budget
If you want to understand why two "similar" projects can cost twice as much one as the other, look at these seven factors. They are the ones that genuinely move the needle:
- Number of user roles. Every type of user (admin, customer, operator, manager) is practically an application within the application: their permissions, their screens, their logic.
- Integrations with existing systems. Connecting to an ERP, a CRM or a payment gateway adds work and dependencies. Good APIs integrate in days; bad or non-existent ones, in weeks.
- Quality and availability of the data. If the data is clean and accessible, everything moves fast. If it is spread across PDFs, loose spreadsheets and one person’s head, it has to be tidied up first.
- Required level of reliability. An internal tool that tolerates the occasional failure does not cost the same as a system that moves money or can never go down. Reliability is paid for in tests, redundancy and monitoring.
- Regulatory compliance. GDPR, the European AI Act or sector requirements (banking, insurance, healthcare) add design, documentation and audit from the first sprint.
- Design and user experience. A functional dashboard for internal use is one thing; a polished product you sell to customers and that competes on design is another.
- Maturity of the requirements. The most underestimated factor. If you know exactly what you want, the team builds. If you discover it as you go, you pay for the exploration, which is legitimate, but it has to be budgeted for.
Why the cheapest quote is usually the most expensive
Faced with three quotes, the temptation is to pick the lowest. It is worth understanding where that difference comes from, because it is rarely efficiency. It is usually one of these:
- They have understood a smaller project than the real one and the difference will show up as "extras" halfway through the build.
- They cut what you cannot see: no tests, no documentation, no serious security. It works in the demo and breaks in production.
- They tie you in. Code only they understand, undocumented, hosted where you have no control. The initial price is low; the cost of maintenance and of leaving, very high. It is the classic vendor lock-in.
Custom software is an investment that lives for years. What matters is not the price of the first invoice, but the total cost of ownership: development, plus maintenance, plus what it costs to change supplier the day you need to. A system you can understand, measure and maintain is worth more than a cheap one nobody knows how to touch.
How to cut the cost without cutting where it hurts
There are legitimate ways of spending less, and all of them are about spending better, not about paying the team less:
- Start with an MVP and grow in phases. Build what pays back first, validate with real usage and reinvest with data in hand rather than guessing.
- Prioritise on return. Not all features are worth the same. 20% of the screens usually solves 80% of the pain. Automate only where there is a real return.
- Bring mature requirements to the first meeting. The clearer it is what you want and why, the less time (and money) goes into exploration.
- Insist on code that is yours, documented and portable. It does not reduce the first invoice, but it removes the most expensive hidden cost: not being able to leave.
The step before asking for a quote: the diagnosis
The most common mistake is asking for software quotes before being clear about which problem is being solved. It is like asking for a building quote with no plans: every supplier imagines something different and the numbers are not comparable.
Before building, it is worth doing a short diagnosis that puts the current operational map on the table, where the friction points are and what has a real return. With that map, quotes stop being an act of faith and become comparable with each other.
That is exactly how we start any custom software development project: we diagnose before proposing. If you are weighing up a project and want a realistic estimate rather than a number invented over the phone, let us talk about your operation and we will tell you frankly which range makes sense and where to start.