How Much Does a Custom Web App Cost in 2026 — Complete Guide

Short answer: on the market, a custom web app costs €8,000–€20,000 for a startup MVP with 1–3 flows (8–12 weeks), €10,000–€30,000 for a dashboard or admin tool, and €25,000–€80,000 for a B2B SaaS app (4–8 months) in 2026. Enterprise platforms start around €80,000. Our own MVP Startup package costs €5,000–€15,000. The spread comes mostly from the number of critical user flows and the external integrations. It is the most frequent question in our first emails, so below is the full breakdown by project type, cost factors, pricing models and pitfalls.

TL;DR: pricing range by project type

Prices exclude VAT. These are market ranges. Our own prices are on the pricing page: landing page 1,500–3,000 RON, brochure site 3,000–6,000 RON, simple online store 6,000–12,000 RON, MVP Startup €5,000–€15,000 and standard web application €10,000–€30,000; for a SaaS product specifically, see the SaaS MVP cost guide.

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. ANAF e-Factura: 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), with audit logs, encryption at rest and 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 and cost.

6. Team that maintains the code post-launch

Mainstream stack (Next.js, PostgreSQL, AWS) is more expensive to build but cheaper to maintain, since developers are easy to hire. 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).

Web app cost per hour: rates in Romania

Average rates in Romania in 2026: junior €25–€40/h, mid-level €40–€70/h, senior €70–€120/h. For Western European teams, expect 2–3 times more. After launch, budget for upkeep too: our maintenance cost guide covers hosting, updates and support.

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. A production MVP with authentication, payments and an admin panel does not fit into that budget. For reference, our MVP Startup package is €5,000–€15,000 for a tight scope agreed in discovery.

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», walk away.

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

1. Write 1-2 paragraphs about problem, audience, main flows.
2. Must-have features separated from nice-to-have.
3. Approximate budget you have (even a range €10k-€20k helps).
4. Timeline if there are constraints.
5. Get 3 quotes from agencies/freelancers, compare. Beware of huge spreads: they signal unclear scope.

Frequently asked questions

How much does a custom web app cost in 2026?

On the market, a startup MVP with 1–3 flows costs €8,000–€20,000, a dashboard or admin tool €10,000–€30,000, and a B2B SaaS app €25,000–€80,000. Enterprise platforms start around €80,000. Our MVP Startup package costs €5,000–€15,000. Prices depend mostly on the number of critical flows and external integrations.

How much does a web app MVP cost?

On the market, €8,000–€20,000 for 1–3 flows, delivered in 8–12 weeks. With us, the MVP Startup package costs €5,000–€15,000 for 2–3 critical flows in 8–10 weeks. Offers far below €5,000 usually mean a clickable prototype or a no-code build, not production code.

What are developer hourly rates in Romania in 2026?

Average rates: junior €25–€40/h, mid-level €40–€70/h, senior €70–€120/h. Western European projects typically cost 2–3 times more.

How long does it take to build a web app?

A startup MVP takes 8–12 weeks, a dashboard or admin tool 10–16 weeks, a B2B SaaS app 4–8 months and an enterprise platform 8–18 months.

Fixed price or time and materials?

Fixed price fits clear scope under €15,000 delivered in at most 3 months. Time and materials fits larger projects (€20,000+) where the scope will evolve.

Conclusion

The right price for your custom web app in 2026 depends on scope, but use the market as a benchmark: startup MVP €8k-€20k, B2B SaaS €25k-€80k, enterprise €80k+ (our MVP Startup package: €5k-€15k). Fixed 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.