The verdict in three sentences
A hotel group does not need to replace its PMS: it needs a control layer that aggregates data from every property and centralizes yield management and reporting. This custom software costs 60,000 to 200,000 EUR (roughly 240,000-800,000 AED) depending on the number of hotels and the depth of integrations. The ROI is measured in RevPAR points: across a 6-hotel portfolio, 2 to 4 points are enough to repay the project in under 18 months.
PMS, channel manager, custom layer: who does what
The classic misunderstanding is believing a PMS is enough to run a group. A PMS manages one property; the channel manager distributes rooms across OTAs; but neither provides a consolidated real-time view of the portfolio or cross-property yield. That is the custom layer's job.
| Component | Role | Scope | 2026 cost (order of magnitude) |
|---|---|---|---|
| PMS (per hotel) | Bookings, check-in, billing | 1 property | 300-900 EUR/mo/hotel |
| Channel manager | OTA distribution, rate parity | 1 property | 150-400 EUR/mo/hotel |
| Market RMS | Automated yield | 1 property | 400-1,200 EUR/mo/hotel |
| Custom layer | Consolidation, group yield, reporting | Whole portfolio | 60,000-200,000 EUR (one-off) |
| Generic BI | Dashboards | Whole portfolio | 15,000-40,000 EUR |
The layer connects to the PMSs via API, normalizes the data and exposes a single cockpit. It replaces nothing: it connects.
What custom development costs by group size
The budget depends mainly on the number of properties to integrate and how heterogeneous their PMSs are. A single-PMS portfolio is far cheaper to connect than one where each hotel runs its own system.
| Group size | Properties | PMS integrations | Project budget | Timeline |
|---|---|---|---|---|
| Small group | 3-5 hotels | 1 shared PMS | 60,000-90,000 EUR | 3-4 months |
| Mid group | 6-12 hotels | 1-2 PMS | 90,000-140,000 EUR | 4-6 months |
| Large group | 13-25 hotels | 2-3 PMS | 140,000-200,000 EUR | 6-9 months |
| Heterogeneous group | 6-15 hotels | 3+ PMS | 160,000-220,000 EUR | 7-10 months |
| Annual maintenance | — | — | 15-20% of build/yr | ongoing |
Add hosting (roughly 300-800 EUR/mo) and support. Always budget 15-20% of the build in annual maintenance to absorb PMS API changes.
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Mini case study
Sophie, managing director of a group of six 4-star hotels along the French Riviera (Nice, Cannes, Antibes), oversees 480 rooms. Average 2025 RevPAR: 128 EUR. She invests 110,000 EUR in a group yield and reporting layer.
Target gain: +3 RevPAR points from cross-property yield and demand reallocation between hotels. Calculation: 480 rooms × 365 nights × 3 EUR extra RevPAR = 525,600 EUR of additional annual revenue. Even conservatively keeping just a third of that gain (175,000 EUR), the project pays back in under 8 months, excluding reporting time savings (estimated at 20 h/week at head office).
FAQ
Do we have to replace our existing PMS? No, in the vast majority of cases. The layer connects to your current PMSs via API. Replacing a PMS is a separate, much heavier project (often 6-12 months per hotel).
How long to connect a new hotel after launch? If the hotel uses an already-integrated PMS, allow 2 to 4 weeks. A new PMS needs a dedicated connector: 4 to 8 weeks and 8,000-20,000 EUR.
Is group yield really better than per-hotel yield? Yes for a geographically concentrated portfolio: reallocating demand between nearby properties captures bookings that would otherwise be lost. Typical gains observed are 2 to 5 RevPAR points.
What is the main project risk? The quality and stability of the PMS APIs. An upfront integration audit (5,000-10,000 EUR) avoids surprises and firms up the estimate.
Can we start small? Yes. An MVP on 2-3 hotels with consolidated reporting ships in 8-10 weeks for 40,000-55,000 EUR, then you extend to the rest of the portfolio.
Let's scope your project. Tell us the number of hotels, the PMSs in place and your priorities (yield, reporting, distribution) and we will frame a scope and indicative budget. 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.


