The verdict in three sentences
A realistic B2B website project ships in 8 to 16 weeks depending on scope, not three. The top delay factor is almost never the agency: it is client content (copy, visuals, approvals) that adds an average of 3 to 5 weeks. This 2026 timeline lays out every milestone, its deliverables and the cost of slippage (2,000 to 6,000 EUR/month of delay) for your leadership.
The milestone-by-milestone timeline
A credible plan reads in milestones, not vague dates. Here is the typical sequence of a B2B site in Berlin in 2026, with durations and the deliverable that validates each phase.
| Phase | 2026 duration | Validation deliverable |
|---|---|---|
| Scoping & brief | 1 to 2 weeks | approved brief, signed plan |
| UX/UI design | 2 to 4 weeks | approved mockups |
| Development | 4 to 8 weeks | site in UAT |
| Content & migration | 2 to 3 weeks | content integrated |
| UAT & fixes | 1 to 2 weeks | acceptance report |
| Go-live | 2 to 5 days | site in production |
| Total | 8 to 16 weeks | final acceptance |
Phases partially overlap: content is prepared during development. A serious plan builds in this parallelism, otherwise the total inflates mechanically.
Where delays hide (and their cost)
Slippage is not inevitable: it comes from identified causes, mostly on the client side. Here are the typical 2026 delays and their estimated cost.
| Delay cause | Timeline impact | Estimated cost |
|---|---|---|
| Late client content | +3 to 5 weeks | 2,000 to 6,000 EUR |
| Slow approvals (multi-level) | +1 to 3 weeks | 1,000 to 3,000 EUR |
| Scope changed mid-project | +2 to 4 weeks | +30% of quote |
| Underestimated migration | +1 to 2 weeks | 1,500 to 4,000 EUR |
| Rushed client UAT | +1 to 2 weeks | post-live bugs |
| Unavailable stakeholder | +1 to 2 weeks | variable |
The cost of one month of delay (2,000 to 6,000 EUR) blends lost business, team mobilisation and postponed campaigns. Naming a single client-side contact and delivering content on time neutralises 70% of this risk.
Mini case study
Thomas, client-side project manager at a services SME in Berlin, must present a timeline to leadership for an 18,000 EUR website. The agency announces 11 weeks. Thomas spots the content risk: 40 pages to write in-house. He blocks 2 dedicated weeks for upfront content production and names a single approver. Result: the project holds at 12 weeks instead of the 16 to 17 typical when content drags. The month saved represents roughly 4,000 EUR in avoided delay cost, for an investment of 10 days of planned internal mobilisation. His leadership approves a credible plan, not an optimistic one.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
How long to deliver a B2B website in 2026?
Between 8 and 16 weeks depending on scope: 8 for a simple corporate site, 16 for a site with a client area, migration and multilingual. A 3-4 week promise is a warning sign about quality.
What is the top delay factor?
Client content: copy, visuals and approvals add an average of 3 to 5 weeks. It is almost never the agency; it is internal production dragging for lack of anticipation.
How much does a month of delay cost?
Between 2,000 and 6,000 EUR depending on the business: lost trade, postponed campaigns and team remobilisation. Delivering content on time neutralises much of this cost.
Do you need a single client-side contact?
Yes, absolutely. A single approver reduces multi-level approval cycles that alone add 1 to 3 weeks. It is the most cost-effective lever in the plan.
Can you speed up without degrading quality?
Yes, by parallelising: content is prepared during development and UAT is prepared during integration. Well orchestrated, this saves 2 to 3 weeks without cutting testing.
Let's scope your project. Give us your target deadline and scope: we hand you a milestone-based, realistic timeline. 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.
