The verdict in three sentences
A custom multi-property B2B booking platform costs between 35,000 and 100,000 EUR in 2026, delivered in 14 to 24 weeks, with a real-time calendar, online payment and back office. Monthly maintenance runs between 400 and 900 EUR depending on transaction volume and integrations. The item that tips the budget is PMS integration across properties and the choice between custom and vertical SaaS.
What makes up a booking platform
In business travel, multi-property booking demands reliability: no overbooking, up-to-date availability, secure payment, and a clear back office for each property. In Miami, it's often hotel groups or event-space networks wanting to move off OTAs and reclaim their direct channel.
| Feature | Scope | Indicative cost |
|---|---|---|
| Calendar & availability | Real-time, multi-site | 7,000-16,000 EUR |
| Booking engine | Rules, rates, options | 8,000-18,000 EUR |
| Online payment | Deposit, balance, refund | 5,000-11,000 EUR |
| Property back office | Management, statuses, exports | 6,000-14,000 EUR |
| B2B client area | Accounts, history, invoices | 4,000-10,000 EUR |
| PMS / channel integration | Synchronization | 5,000-16,000 EUR |
Custom vs vertical SaaS
Vertical SaaS (a ready-made booking solution) starts fast but bills by volume and limits customization. Custom costs more upfront but becomes profitable once SaaS commissions exceed the build's amortization.
| Criterion | Vertical SaaS | Custom |
|---|---|---|
| Upfront cost | 3,000-12,000 EUR (setup) | 35,000-100,000 EUR |
| Recurring cost | 2-5 % of revenue + subscription | 400-900 EUR/month |
| Customization | Limited to configuration | Total |
| Vendor dependence | High | None |
| Profitable if booking revenue | Low volume | > 400,000 EUR/year |
Mini case study
Sophie, sales director of a 5-property seminar group in Miami, pays 4 % commission to a booking SaaS on 1.2M EUR revenue, i.e. 48,000 EUR/year. She invests 68,000 EUR in a custom platform delivered in 18 weeks, with 700 EUR/month maintenance (8,400 EUR/year). In the first year she saves 48,000 EUR of commissions against a 76,400 EUR total cost: the extra spend is absorbed in about 20 months, after which she saves ~40,000 EUR net per year while owning her customer data and booking experience.
FAQ
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Custom or vertical SaaS to start?
Below 300,000 EUR annual booking revenue, vertical SaaS stays cheaper. Above that, commissions make custom profitable in under two years.
How much to integrate with the properties' PMS?
Between 5,000 and 16,000 EUR depending on the PMS and API availability. Some channel managers ease synchronization and reduce this item.
Is online payment complex to integrate?
Expect 5,000 to 11,000 EUR to handle deposit, balance and refund. Stripe or a local PSP covers most B2B needs with automatic invoices.
What is a realistic go-live timeline?
14 to 24 weeks depending on the number of properties and integrations. A first pilot site can often launch earlier, then be rolled out.
What maintenance budget to plan?
Between 400 and 900 EUR/month depending on transaction volume, payment security and integrations to keep updated.
Let's scope your project. Specify the number of properties, your current PMS and your booking volume: we'll cost custom vs SaaS with a break-even point. 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.
