The verdict in three sentences
In 2026, a B2B web app MVP ships in 10 to 16 weeks, a working V1 in 4 to 6 months after 2-3 weeks of scoping. The standard cadence is the two-week sprint, with a 15 % buffer for integration and business-validation slippage. A date with no buffer and no intermediate milestones is a promise, not a plan.
Typical phase-by-phase schedule
The durations below reflect a medium-complexity app (5-8 modules, one or two third-party integrations) run by a team of 3-4 people.
| Phase | Duration | Exit milestone |
|---|---|---|
| Scoping & specs | 2-3 wks | Prioritised backlog + key mockups |
| Technical setup | 1 wk | Environments + CI/CD ready |
| MVP (core) | 8-12 wks | Critical path usable |
| MVP acceptance | 1-2 wks | Blocking bugs cleared |
| Extension to V1 | 8-12 wks | Secondary modules + admin |
| Acceptance & hardening | 2-3 wks | Perf, security, accessibility |
| Go-live | 1 wk | Production + active monitoring |
That is roughly 22 to 34 weeks from scoping to V1 go-live. These are 2026 orders of magnitude to adjust for complexity.
What lengthens (or shortens) timelines
Some factors weigh heavily on the schedule. Anticipating them prevents slippage.
| Factor | Timeline impact | Countermeasure |
|---|---|---|
| Vague specs at kickoff | +20 to +40 % | Stronger scoping, prototype |
| ERP / legacy integration | +2 to +6 wks | Early API access, test env |
| Slow business validation | +1 to +3 wks | Single decision owner |
| Unfrozen design | +2 to +4 wks | Design system signed off before dev |
| Under-resourced acceptance | +1 to +2 wks | Test plan and dedicated testers |
| Stable scope | -10 to -15 % | Freeze the MVP scope |
The number-one cause of delay isn't technical: it's slow client-side validation. A single, available decision-maker is worth several person-days.
Mini case study
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Sophie, product manager at a software vendor in Nantes, wants to launch a B2B order-tracking module before the half-year end, giving her 20 weeks.
- Scoping: 3 wks. Setup: 1 wk. MVP: 12 wks. Acceptance: 2 wks. Raw total: 18 weeks.
- 15 % buffer: +2.7 weeks => 20.7 weeks, a one-week overrun.
Sophie decides to cut the MVP to 4 essential modules (instead of 6), bringing the MVP to 10 weeks. New total: 16 weeks + buffer = 18.4 weeks. She hits the date with 1.6 weeks to spare and defers 2 modules to V1.1.
FAQ
How long for an MVP in 2026? Count on 10 to 16 weeks for medium complexity. Below 8 weeks it's usually a prototype, not a usable product.
Why plan a 15 % buffer? Because third-party integrations, acceptance feedback and business validation always slip a little. A 15 % buffer absorbs the ordinary without inflating the budget.
Can more developers go faster? Only up to a point. Beyond 4-5 devs on the same scope, coordination cancels the gain (Brooks's law). Better to cut scope.
What's the main cause of delay? Slow client-side validation, ahead of technical unknowns. An available decision-maker saves 1 to 3 weeks.
Should I deliver all at once or by milestones? By milestones. A delivery every 2 weeks surfaces risk early and lets you arbitrate scope before it's too late.
Let's scope your project. Describe the key modules, your system integrations and your target date: we'll build a sprint schedule with milestones and a costed buffer. 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.
