The verdict in three sentences
A billable B2B SaaS MVP — not a mere proof-of-concept — costs between 35,000 and 70,000 EUR (excl. VAT) in 2026 and ships in 10 to 16 weeks. The price gap comes down to one trade-off: how many critical modules (authentication, subscription billing, back-office) sit inside the first launch scope. A non-technical founder must scope recurring payment into the MVP itself, otherwise they are selling a demo, not a product.
Line-by-line breakdown
The classic trap is budgeting only "development" while forgetting discovery, QA and DevOps, which together weigh a third of the envelope. Here is the split observed on B2B SaaS MVPs delivered in 2025-2026 (2026 order of magnitude).
| Line item | Range (EUR excl. VAT) | Share of budget |
|---|---|---|
| Discovery & scoping | 4,000 – 8,000 | 12% |
| Product design / UX-UI | 6,000 – 12,000 | 18% |
| Auth + role management | 4,000 – 7,000 | 11% |
| Subscription billing | 8,000 – 14,000 | 20% |
| Core features (2-3) | 10,000 – 18,000 | 27% |
| QA & acceptance testing | 3,000 – 6,000 | 8% |
| DevOps & go-live | 2,000 – 5,000 | 4% |
| MVP total | 35,000 – 70,000 | 100% |
Split by discipline rather than line item, you get the rule of thumb: 55% development, 20% product/UX, 15% QA, 10% DevOps. If a quote shows 90% pure development, QA and scoping will be billed later as an overrun.
Day rates, timelines and recurring costs
The average day rate for a team able to ship a clean B2B SaaS sits in 2026 between 480 and 640 EUR (excl. VAT) depending on seniority and the agency/freelance mix. Add the infrastructure runway, often underestimated at launch.
| Item | 2026 estimate |
|---|---|
| Fullstack developer day rate | 480 – 640 EUR excl. VAT |
| Product designer day rate | 450 – 600 EUR excl. VAT |
| MVP timeline (scoping → prod) | 10 – 16 weeks |
| Infra & services (hosting, email, payments) | 150 – 450 EUR/month |
| Post-launch corrective maintenance | 8 – 12% of budget/year |
| Recommended contingency | 10 – 15% |
Mini case study
Eleanor, non-technical founder of an HR SaaS startup in London, wants to launch an annual-review tracking tool billed at 39 EUR/month per client company. MVP scope: multi-user authentication, Stripe subscription billing, two core features (scheduling + reporting). Arbitrated budget: 52,000 EUR (scoping 6,000, UX 9,000, auth 5,000, billing 11,000, core 15,000, QA 4,000, DevOps 2,000), timeline 13 weeks. With an average ticket of 39 EUR/month and 3% contingency consumed, she covers her annual maintenance (~5,000 EUR) from 11 paying clients. Decision: she self-funds the MVP and keeps her raise for acquisition.
FAQ
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What is the difference between an MVP and a proof-of-concept?
A proof-of-concept (5,000 – 15,000 EUR) validates a technical hypothesis without real users; an MVP is a sellable product with payments, accounts and support. Confusing the two inflates the budget by 40% when you try to "make the demo paid".
Why does subscription billing cost 8,000 to 14,000 EUR?
Because it covers plan management, trials, failed payments, compliant invoices and Stripe webhooks. It is the most underestimated line: done poorly, it produces unpaid invoices and disputes from your very first clients.
Can you go below 35,000 EUR?
Yes, by removing recurring payment or limiting to a single feature — but then you have a POC. For a genuinely sellable B2B SaaS, 35,000 EUR (excl. VAT) is the realistic floor in 2026.
What should I budget after launch?
Between 8 and 12% of the initial budget per year in corrective maintenance, plus infra (150 – 450 EUR/month). Also plan a V1 envelope: the MVP always reveals 2-3 priority workstreams.
Is a 640 EUR day rate justified?
A higher day rate on a senior team often lowers total cost: fewer rewrites, an architecture that survives V1, robust billing. The real risk is a low rate hiding absent QA.
Let's scope your project. Tell us your MVP scope (core features, subscription model, indicative budget, target timeline) and we will break the envelope down line by line. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
