From Idea to SaaS MVP: Timeline and Budget (2026)

The verdict in three sentences

From idea to SaaS MVP, plan on 3 to 5 months and 25,000 to 70,000 EUR (excl. tax) in 2026, discovery and design included. The timeline splits into clear phases — discovery, design, development, launch — each punctuated by a validation milestone that authorizes (or not) the next one. The main danger isn't overrunning the schedule, it's building into the void: each milestone exists to test your idea against the market before injecting more money.

The phase-by-phase timeline

Here's the typical breakdown of a SaaS MVP delivered in 4 months for a median budget of 45,000 EUR.

A broader scope (several features, integrations, mobile) pushes the whole toward 5 months and 70,000 EUR. Conversely, a very focused core feature can ship in 3 months under 30,000 EUR.

Market-validation milestones

Every euro invested should buy certainty. Here are the milestones that protect your budget.

If a milestone turns red, you adjust or pivot before spending the next phase. That's where the MVP protects your cash.

How to avoid building what nobody wants

Discovery isn't a luxury: 8 to 12 interviews with the target, a competitive analysis and, ideally, letters of intent (LOI) before design even starts. An MVP built on a need validated by real prospects has far higher odds of traction than an "obvious" idea never tested in the field. A pre-launch — landing page, waitlist — measures real appetite before writing a single line of business code.

Mini case study

Karim, founder of a scheduling SaaS project for communication agencies in Bordeaux, wanted to launch in 6 weeks. Discovery (2 weeks, 6,500 EUR) revealed that his supposedly central "billing" feature interested no one, while client retro-planning was unanimous. Pivot before design: the refocused MVP cost 41,000 EUR (excl. tax) over 4 months. Result: 9 paying customers at 79 EUR/month at launch, or 711 EUR of MRR, versus near-certain failure on the original feature. The 6,500 EUR of discovery avoided a 25,000 EUR build in the wrong direction.

FAQ

Can we skip discovery to go faster?

You can, but it's the most expensive bet on the market. Discovery is 10 to 15% of the budget and routinely avoids building a core feature nobody wants — tens of thousands of euros lost.

Is 3 months really achievable?

Yes, for a single core feature and disciplined scope. The 3 months assume fast client decisions and zero scope additions along the way. Every new request pushes the launch.

How much should we plan after the MVP?

An iteration budget of 3,500 to 8,000 EUR per month to turn feedback into retention. The MVP opens the game; the following 6 months decide product-market fit.

How do I know if my idea deserves an MVP?

If you get 8 to 12 interviews where the target spontaneously describes the problem and its current cost, the signal is good. If you have to convince them they have a problem, be wary.

Should we raise funds before building?

Not necessarily. Many B2B MVPs are bootstrapped at 30,000-45,000 EUR and reach a first MRR that then credibilizes a raise. The MVP is often the best argument in front of investors.

Let's scope your project. Share your idea, your target and an indicative budget, and we'll frame a realistic timeline with validation milestones. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.