The verdict in three sentences
A custom B2B booking platform costs between 18,000 and 55,000 EUR excl. VAT in 2026, depending on the number of resources to manage and the complexity of booking rules. It removes up to 70 % of scheduling emails and calls and stabilizes the fill rate. The delivery timeline for a V1 is 3 to 5 months.
The modules of a booking platform
Whether it is slots (training, workshops, services) or resources (rooms, machines, vehicles), the logic is the same: expose availability, take payment, and give each B2B client their own space with negotiated rates.
| Module | Function | 2026 range (EUR excl. VAT) |
|---|---|---|
| Calendar & availability | Time rules, capacities, buffers | 4,000 - 9,000 |
| B2B client accounts | Negotiated rates, multi-user | 3,500 - 8,000 |
| Online payment | Card, transfer, deposit, credit note | 3,000 - 7,000 |
| Resource management | Rooms, equipment, staff | 3,500 - 8,500 |
| Notifications | Email/SMS reminders, follow-ups | 2,000 - 4,500 |
| Dashboard | Occupancy rate, revenue, no-shows | 3,000 - 7,000 |
| Invoicing | Auto invoices, accounting export | 3,000 - 6,500 |
Cost by scope
The timeline is 3 to 5 months. Price depends mostly on the number of resource types, per-client pricing rules and the need for payment/accounting integration.
| Profile | Resources | Scope | 2026 cost (EUR excl. VAT) | Timeline |
|---|---|---|---|---|
| Single-service provider | 1 type | Calendar + payment | 18,000 - 26,000 | 3 months |
| Multi-service SME | 3-5 types | + B2B accounts + rates | 30,000 - 42,000 | 4 months |
| Network / multi-site | 5+ types | + multi-site + BI + API | 45,000 - 55,000 | 5 months |
Mini case study
Julien runs a professional training center in Amsterdam, with 6 rooms and 40 sessions a month. His assistant spends about 12 h/week managing registrations by email and phone. At a loaded cost of 28 EUR excl. VAT/h, that is 12 x 28 x 47 weeks = about 15,800 EUR excl. VAT/year.
With a self-service platform, he cuts that time by three and recovers about 10,500 EUR excl. VAT/year, while reducing no-shows through online deposits. His platform, priced at 34,000 EUR excl. VAT, pays back in a little over 3 years on this item alone, but within the first year once you count the extra sessions sold thanks to 24/7 booking.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Why not use a consumer appointment tool?
Consumer tools at 10-30 EUR/month handle neither per-client negotiated rates, complex resources, nor B2B invoicing. As soon as you have client accounts with specific terms, custom becomes relevant.
Is online payment mandatory?
No, but a deposit strongly reduces no-shows. A 30 % deposit taken at booking clearly lowers last-minute cancellations and secures your schedule.
Can we manage several sites?
Yes. The multi-site module lets you run several branches with distinct resources and permissions. Budget an extra 8,000 to 12,000 EUR excl. VAT for this block.
How much is maintenance?
About 15 to 20 % of the initial cost per year, i.e. 5,000 to 11,000 EUR excl. VAT/year for a 34,000 EUR platform, including hosting, updates and support.
Can the platform connect to our CRM?
Yes, via API. Syncing client accounts and bookings with a CRM (HubSpot, Pipedrive) costs 3,000 to 6,000 EUR excl. VAT depending on depth.
Let's scope your project. Specify your resource types, B2B pricing rules and online-payment needs: we will scope a V1 between 18,000 and 55,000 EUR excl. VAT. 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.
