The verdict in three sentences
A custom management platform for a multi-property hotel group in London ranges from 40,000 to 95,000 EUR in 2026, depending on the number of hotels, the depth of yield management and OTA connections. The real lever is not saving on PMS licences but the 3-5 point gain in occupancy and the centralised rate arbitrage across the whole estate. Budget 4 to 8 months to build a PMS + channel manager + consolidated reporting stack that leadership actually steers by.
What the budget covers and how it breaks down
A group of 3 to 6 hotels is not looking for yet another PMS: it wants to unify its data (availability, rates, guests) and decide fast. Here are the main blocks and their 2026 custom-development order of magnitude.
| Module | Role | Range (EUR) | Timeline |
|---|---|---|---|
| Multi-property PMS | Bookings, check-in, billing | 12,000 - 24,000 | 6-10 wks |
| Channel manager / OTA | Booking, Expedia, Airbnb, rate parity | 8,000 - 18,000 | 4-7 wks |
| Yield / revenue management | Dynamic rates, rules, thresholds | 9,000 - 22,000 | 5-9 wks |
| Consolidated reporting | RevPAR, occupancy, ADR by site and group | 6,000 - 14,000 | 3-6 wks |
| Leadership portal + roles | Multi-site access, permissions | 5,000 - 12,000 | 3-5 wks |
| Integrations (accounting, legacy PMS) | API, data migration | 4,000 - 10,000 | 2-5 wks |
The low end (40,000 EUR) fits 3 hotels with a standard channel manager; the high end (95,000 EUR) covers 6+ properties with advanced yield and real-time dashboards.
ROI is about RevPAR, not the licence
The metrics that justify the investment are occupancy and revenue per available room. Here are 2026 orders of magnitude for a 200-room London estate.
| Metric | Before (separate tools) | After (unified software) | Annual impact |
|---|---|---|---|
| Average occupancy | 68% | 72% | +4 pts |
| ADR (average nightly rate) | 118 EUR | 124 EUR | +5% |
| RevPAR | 80 EUR | 89 EUR | +11% |
| Room-nights sold/year | 49,640 | 52,560 | +2,920 |
| Channel/OTA cost | 17% of OTA revenue | 14% of OTA revenue | -3 pts |
| Reporting hours/month | 22 h | 5 h | -17 h |
Across 200 rooms, +9 EUR of RevPAR is roughly 657,000 EUR of additional annual revenue (200 x 365 x 9). Even attributing only a fraction to the software, the return far exceeds the build budget.
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Mini case study
Sophie, managing director of a 4-hotel group in Greater London (280 rooms total). She juggles two different PMS systems, a separately rented channel manager and weekly Excel exports. She invests 62,000 EUR in a unified platform delivered in 6 months. Result over 12 months: occupancy from 69% to 73%, ADR from 132 to 138 EUR. RevPAR rises from 91 to 100 EUR, i.e. +9 EUR x 280 rooms x 365 days ≈ 920,000 EUR of extra revenue. Attributing a conservative 10% to the software, the net gain exceeds 90,000 EUR in year one: payback in under 9 months.
FAQ
What is the minimum budget to start with 3 hotels? Budget 40,000 to 55,000 EUR for a PMS + channel manager + consolidated reporting core, delivered in 4 to 5 months. Advanced yield can be added in phase 2.
Do we have to replace the existing PMS systems? Not necessarily: an integration layer (4,000 to 10,000 EUR) can aggregate your current PMS systems and add only yield and consolidated reporting, cutting initial risk and cost.
How much is annual maintenance? Plan for 15 to 20% of build cost per year, roughly 6,000 to 19,000 EUR, covering enhancements, support and OTA connector updates.
How quickly do we see the occupancy effect? The first yield gains show up 2 to 3 months after go-live, once rate rules are calibrated on your properties' history.
Can we connect Booking and Expedia without extra cost? Booking/Expedia/Airbnb connectors are included in the channel manager module; only niche OTAs or a specific GDS trigger additional development of 2,000 to 5,000 EUR.
Let's scope your project. Tell us your estate (number of hotels, rooms, current PMS) and your occupancy target: we frame a scope in the 40,000-95,000 EUR range. 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.
