Custom web apps are priced by the work involved, not off a menu, because each one is built for a specific job. That makes "what does it cost" hard to answer in a line, so this guide gives real 2026 ranges by type, explains what drives the price, and shows how custom compares to paying monthly for SaaS.
How much does a custom web app cost in Ireland?
In 2026, custom web apps in Ireland typically start around €6,000 and run to €25,000 or more for complex systems. A simple internal tool might be €6,000 to €12,000, while an app with logins, payments, integrations and many features costs more. The price reflects the features, complexity and integrations your specific app needs.
What does each type of app cost?
Cost scales with complexity. The table shows typical 2026 starting ranges in Ireland; your exact figure depends on the features.
| Type of app | Typical cost | Example |
|---|---|---|
| Simple internal tool | €6,000 to €12,000 | A dashboard replacing spreadsheets for one team |
| Customer portal | €10,000 to €20,000 | Secure client logins for orders, documents or accounts |
| Booking / scheduling system | €10,000 to €25,000 | Tailored booking with staff, rules and payments |
| Larger platform | €25,000+ | A multi-user system with integrations and custom workflows |
Get a figure for your exact idea with a free quote, or see our custom web apps service.
What affects the cost of a custom web app?
The main drivers are the number and complexity of features, user logins and permissions, integrations with other systems, and the amount of custom design. Payments, real-time updates, complex rules and data migration all add work. A tightly scoped app that does one job well costs far less than a sprawling system trying to do everything at once.
- Features: each distinct feature is more to design, build and test.
- Logins and roles: accounts, permissions and security add work.
- Integrations: connecting to payments, accounting or other tools.
- Scope discipline: a focused first version costs much less than everything at once.
Why do custom apps cost more than a website?
A brochure website mainly presents pages; a web app is functioning software with logins, data, logic and security to build and test. That is genuinely more engineering, which is why a website in Ireland often runs €800 to €3,000 while a custom app starts around €6,000. See our guide to general website costs for the comparison.
Custom app or monthly SaaS: which costs less over time?
SaaS is cheaper to start but charges per user every month, which can overtake the one-off cost of a custom app within a few years for a growing team. Custom costs more up front but has no per-user fees and is yours to keep. The maths depends on your user count and how well SaaS fits. We weigh it up in custom software vs SaaS.
Are there ongoing costs?
Yes, but modest: hosting (from a few euro to tens of euro a month depending on usage), plus optional maintenance to keep it secure, updated and backed up. There are no per-user licence fees as with SaaS. Budgeting for maintenance is wise, because a web app, like any software, needs occasional updates to stay secure.
How do I keep the cost down?
Start with the single feature that delivers the most value, launch it, then add to it once it is earning its keep. Being clear about what you actually need, rather than every nice-to-have, is the biggest lever. A good developer will help you scope a sensible first version instead of quoting a giant build you may not need.
Frequently asked questions
Can I build it in phases to spread the cost?
Yes, and it is usually the smart approach. Build the core feature first, get it live and useful, then add more in later phases as budget and need allow. This spreads cost, reduces risk, and means you benefit from the app sooner rather than waiting for a big-bang launch.
Why is custom more expensive than a monthly SaaS tool?
Because you are paying once to build something that is yours, rather than renting shared software. Over time the lack of per-user fees can make custom cheaper, but the up-front cost is higher because it is bespoke engineering for your exact needs.
Will I get a fixed price?
For a well-scoped app, yes, we quote a clear price for an agreed set of features, and price any later additions separately. Vague or ever-changing requirements are what make costs balloon, so we spend time scoping properly before quoting.
Have an idea for a custom app? Tell us the problem you want to solve and we will scope it and send a clear price. Get your free quote, or read the full custom web apps guide.