How Much Does a Custom Web App Cost in 2026 — Complete Guide
A founder lands in our inbox. Three paragraphs about the idea. Then the question: «how much?». And the show begins. Three agencies will quote three radically different prices — €8,000, €35,000, €120,000 — for the same brief. None of them are lying. All three could deliver. The difference lies in what «your application» means to each of them. This piece explains why — not to convince you to pick us, but so you don't get fooled by the €8k or by the €120k.
TL;DR — pricing range by project type
| Project type | Typical price (EUR) | Timeline |
|---|---|---|
| Custom landing page | €1,500 – €5,000 | 2-4 weeks |
| WordPress presentation site | €2,000 – €8,000 | 3-6 weeks |
| Startup MVP (1-3 flows) | €8,000 – €20,000 | 8-12 weeks |
| Dashboard / admin tool | €10,000 – €30,000 | 10-16 weeks |
| Standard online store | €5,000 – €25,000 | 6-12 weeks |
| B2B SaaS app | €25,000 – €80,000 | 4-8 months |
| Enterprise platform | €80,000 – €300,000+ | 8-18 months |
Why does the price vary so much?
The same app, described in 10 words by a founder, can cost €8,000 or €80,000 depending on details the founder didn't mention. Here are the factors that explain the spread.
1. Number of critical flows
A flow = a complete user-facing path the product solves. «User signs up, pays, gets access» = 1 flow. «Admin invites client, client fills form, data appears at admin» = another flow. Price scales near-linearly with flow count.
2. External integrations
Payments (Stripe, PayU) take 1-3 days if simple. e-Factura ANAF: 5-10 days for proper integration with retry, error handling, XML validation. eMAG Marketplace: 2-3 weeks for bidirectional sync with stock, prices, orders, returns.
3. UX/UI requirements
- Use existing design system (shadcn/ui, Tailwind UI): 2-4 weeks design.
- Custom Figma design: 4-8 weeks with dedicated designer — adds €3,000-€10,000.
- New brand identity + custom design system: 8-12 weeks — adds €8,000-€20,000.
4. Compliance & security
Standard GDPR (cookie consent, data export, right to be forgotten) is 3-5 days. Compliance for regulated sectors (FinTech, MedTech) — audit logs, encryption at rest, ISO 27001 prep — adds 4-12 weeks.
5. Performance & scale
An app serving 100 users is fundamentally different from one serving 100,000. The first runs on a €30/month server. The second needs caching, queues, multi-region, observability — different design + cost.
6. Team that maintains the code post-launch
Mainstream stack (Next.js, PostgreSQL, AWS) is more expensive to build but cheaper to maintain — easy dev hiring. Exotic stack (Elixir, Haskell) might be faster for a specific problem but locks you to a small group.
Pricing models — which fits
Fix-price
Fits: projects with clear scope, under €15,000, delivered in max 3 months.
Pros: budget predictability, agency assumes scope creep risk.
Cons: rigid to pivot — any change adds costs through change requests; agency pads the price with 15-25% risk premium.
Time & Materials (T&M)
Fits: large projects (€20,000+), evolving scope, you trust the team.
Pros: max flexibility, you pay only for delivered work, weekly reporting.
Cons: you don't know exact final budget; requires your active involvement for prioritization.
Retainer
Fits: ongoing post-launch development, maintenance, product evolution. You pay €X/month for guaranteed Y hours.
Pros: dedicated team, preferred pricing (10-20% below T&M).
Common pitfalls
Very low offers
Someone offers your MVP for €3,000? They probably deliver a Figma click-through or a Bubble.io that doesn't scale. There's no «quality custom code MVP» under €8,000 in 2026 — math doesn't work: 8 weeks × €100/h × 1 dev = €16,000 internal cost.
Pricing without discovery
If someone gives you a firm price after a 200-word email, they'll either pad heavily or scope-creep mid-project. Insist on a discovery phase (€500-€2,000) with detailed spec before any offer.
Don't own the code
Check the contract: GitHub repo must be yours from day 1. If the agency keeps the code «for security» — run.
Proprietary stack / lock-in
Beware of closed frameworks («our custom platform»). After 1 year you can't switch developer without complete rewrite.
Exotic hourly rates
Average rates in Romania 2026: junior €25-€40/h, mid €40-€70/h, senior €70-€120/h. For Western European projects: 2-3x. If you see €10/h — you're at low-cost outsourcing; quality reflects price.
How to request a quote
- Write 1-2 paragraphs about problem, audience, main flows.
- Must-have features separated from nice-to-have.
- Approximate budget you have (even a range €10k-€20k helps).
- Timeline if there are constraints.
- Get 3 quotes from agencies/freelancers, compare. Beware of huge spreads — sign of unclear scope.
Conclusion
The right price for your custom web app in 2026 depends on scope, but use as benchmark: startup MVP €8k-€20k, B2B SaaS €25k-€80k, enterprise €80k+. Fix-price works for small clear projects, T&M for large projects with evolving scope. The biggest risk isn't price — it's the lowest offer.