Web app development cost for finance & fintech

There is no single figure, and quoting one would be the least useful thing this page could do — the same pairing spans several-fold depending on scope, compliance and how many surfaces you ship. What this page gives you instead is what the pairing demands: the regimes that may apply, the systems of record you will be asked to integrate with, the device matrix and the release path. The calculator below is already fixed to Web and finance & fintech — answer what is left and it returns a cost range, hours, timeline, team and running costs for your scope.

Because finance & fintech brings its own obligations before you write a feature: SOC 2 Type II, PCI DSS, GLBA Safeguards Rule may apply, you will be asked to integrate with systems like Plaid / MX and Stripe, and there are typically 6 distinct roles rather than one. The platform contributes its own separate costs — the device matrix, installers and code signing — and those are independent of the industry.

Yes, for equivalent functionality, and the gap is wider than the build figures suggest. One web codebase replaces two mobile ones, there is no store review in your release path, no commission on revenue, and you can ship a fix in minutes rather than waiting on review. You give up reliable push, offline behaviour and hardware access. If your product does not need those, web-first is both cheaper and faster, and you can add mobile later against the same backend.

A PWA closes part of the gap — installable, offline-capable, and on Android it can do push notifications properly. On iOS the story is weaker: push works only for home-screen-installed apps, background capability is minimal, and discovery through the App Store is absent. PWAs are a strong fit for business tools, internal software and markets where Android dominates. They are a poor fit for consumer products that depend on notification-driven engagement or on being found in a store.

Three reasons, in order of cost. First, correctness: a ledger that must reconcile to the cent needs idempotency, settlement handling and daily reconciliation that a normal CRUD app does not. Second, identity: KYC, sanctions screening and fraud scoring are a subsystem, not a feature. Third, evidence: audit logging, access reviews, retention control and SOC 2 artefacts are continuous engineering. None of it is user-visible, and all of it is mandatory.

Usually, and it will save more than any engineering decision you could make. Using a sponsor bank, a licensed banking-as-a-service provider or Stripe Treasury keeps the regulated activity on their licence rather than yours. This changes your product architecture substantially, so decide it before you build. Talk to fintech counsel early — it is the cheapest hour on the project.