Vertical SaaS build timeline and budget (2026)

The verdict in three sentences

A solid vertical SaaS v1 costs between 80,000 and 250,000 EUR (excl. VAT) in 2026, over 6 to 12 months. The decisive factor is not the tech stack but the increment breakdown: each increment must ship usable, billable value. A tight team — 1 product owner, 2 developers, 1 UX — almost always beats a large, poorly coordinated one.

Roadmap by phase, costs and deliverables

A vertical SaaS is built in increments. Here is a typical breakdown over 8-10 months (2026 order of magnitude, day rate 450-750 EUR excl. VAT).

Then plan an evolutionary maintenance budget of 12 to 20% of the project cost per year, plus cloud infrastructure (300-1,200 EUR/month depending on load and data isolation).

Team composition and monthly cost

The budget also reads as a monthly team cost. A stable cross-functional team avoids idle time and rework.

Over 8 months, this team represents roughly 200,000-320,000 EUR excl. VAT in-house — which is exactly why you start with an MVP before committing to the full v1.

Mini case study

Sophie, general manager of a transport SME in Lille, wants a route-planning SaaS for her sector. She picks a 3-increment v1, budget 145,000 EUR (excl. VAT), timeline 9 months. Increment 1 (route optimization) ships in month 4 and is already used by her 12 dispatchers, saving about 6 hours per week per dispatcher. At a loaded cost of 28 EUR/h, savings reach ~2,000 EUR/week, i.e. more than 100,000 EUR/year — the v1 pays back in under 18 months on this internal gain alone, before any external commercialization.

FAQ

Why break work into increments rather than ship everything at once? Incremental delivery reduces risk: you validate and bill each increment, and can stop or pivot after increment 1. A 9-month big bang with no intermediate deliverable is the main failure driver.

Can you build a vertical SaaS for under 80,000 EUR? Rarely for a true v1: below that threshold you are building an MVP (one feature). A vertical SaaS implies role management, integrations and reliability, which mechanically pushes the budget up.

In-house team or agency? An agency brings a battle-tested team immediately available; in-house costs 26,000-40,000 EUR/month to assemble and takes months to recruit. Many start with an agency, then internalize after traction.

Which deliverables should I demand at each phase? Prioritized backlog at discovery, design system at design, a UAT environment at each increment, technical and deployment documentation at go-live. Without these, project reversibility is not guaranteed.

How do I avoid timeline overruns? Fix scope per increment, freeze it during the sprint, and handle new requests in the next increment. Mid-increment scope change is the number-one cause of slippage.

Let's scope your project. Tell us your industry, your 3 priority increments and a target budget: we build a phase-by-phase costed roadmap. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.