How much a B2B SaaS MVP costs in 2026: phasing and budget

The verdict in three sentences

A credible B2B SaaS MVP in 2026 budgets between 24,000 and 48,000 EUR all-in (scoping + one core feature + auth + Stripe billing), delivered in 10 to 16 weeks. Below 20,000 EUR you are funding a proof of concept, not a sellable product for paying customers. Beyond build costs, plan for 150 to 600 EUR/month of infra plus iterations: the real budget is the first 12 months, not just the launch.

The typical phasing of a B2B SaaS MVP

An MVP is not a shrunk version of everything: it is one single core feature taken all the way, surrounded by the strict minimum (account, payment, minimal dashboard). The classic phasing breaks down as follows.

Each block can be trimmed, but auth and billing are non-negotiable: a SaaS without proper billing is not a SaaS.

The recurring costs everyone forgets

The build is an event, operations are a subscription. Here is the 2026 order of magnitude for a SaaS with a few dozen accounts.

Over 12 months, these items often equal the initial build cost. Budget them from the pitch, otherwise the SaaS dies of post-launch underfunding.

No-code vs custom: the tipping point

No-code (Bubble, Softr, assembled tools) delivers an MVP at 5,000-15,000 EUR in a few weeks, ideal to validate demand. Its limits arrive fast: performance ceilings, subscription costs that climb with users, dependence on a third-party platform. Custom costs more upfront but pays off once you exceed 50-100 active users or bill more than 8,000 EUR/year in no-code subscriptions. The rule: no-code to validate, custom to scale.

Mini case study

Thomas, co-founder of a scheduling SaaS for veterinary clinics in Nantes, is hesitating. He picks a custom MVP at 34,000 EUR (scoping 6,000, core feature 18,000, auth 4,000, billing 4,000, dashboard 2,000), delivered in 13 weeks. Recurring costs: 380 EUR/month infra + 1,500 EUR/month maintenance. With a 79 EUR/month subscription per clinic, he reaches operating breakeven at 24 clients and repays the build in about 18 months at 40 clients. A no-code MVP would have cost him 9,000 EUR, but 40 accounts would have generated 9,600 EUR/year in platform fees: the switch was justified from the business plan onward.

FAQ

Can you build a SaaS MVP for under 20,000 EUR?

Yes, with no-code or by trimming to a proof of concept without solid billing. But to sell to paying B2B customers with auth, billing and reliability, the realistic 2026 floor is around 24,000 EUR.

How long until the first paying customer?

With an MVP delivered in 10-16 weeks and sales running in parallel, first subscriptions often land between month 4 and month 6. The limiting factor is sales, not tech.

Is Stripe mandatory for a B2B SaaS?

No, but it is the 2026 standard for subscriptions, trials and proration, with fees of 1.5% + 0.25 EUR per transaction in Europe. A local alternative is mainly justified if your target market is African (Wave, Orange Money).

Should everything be multi-tenant from the MVP?

Yes for customer data isolation, no for extreme optimization. A simple multi-tenant (shared schema + tenant ID) is enough at first and costs 3,000-6,000 EUR.

What happens after the MVP?

You enter a cycle of monthly iterations (2,000-6,000 EUR) driven by customer feedback. The MVP is a starting point, not an end: reserve 30-40% of the total budget for the following 12 months.

Let's scope your project. Tell us your core feature, your B2B target and an indicative budget, and we will price a phased MVP with auth and Stripe billing. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.