Overbooking

Overbooking is the practice of deliberately accepting more reservations than a hotel has rooms available for a given night, on the assumption that a predictable share of bookings will cancel, no-show, or wash out before arrival. Done well, it protects the hotel from selling out "on paper" while arriving at the night with empty, unsellable rooms.

Formula

A common starting point for the overbooking level is:

Overbooking Allowance = Expected Cancellations + Expected No-shows + Expected Early Departures − Expected Extended Stays

Revenue management systems refine this with probabilistic models per stay date, segment, and rate plan, weighing the cost of a walked guest against the revenue of an otherwise empty room.

Example

A 200-room hotel has 200 rooms sold for Saturday. Historical data shows 4% of bookings cancel inside 48 hours and 2% no-show. Expected attrition is roughly 12 rooms, so the hotel keeps selling up to 210–212 reservations. If attrition comes in as forecast, the hotel arrives at the night close to 100% occupancy instead of 94%.

Why it matters

Cancellations and no-shows are structural in OTA-heavy channel mixes — flexible, pay-at-property rates on Booking.com and Expedia can wash at 25–40% in some markets. A hotel that never overbooks systematically underperforms its true demand; one that overbooks too aggressively ends up "walking" guests to other hotels, paying relocation costs and absorbing reputation damage in reviews. Overbooking is therefore one of the clearest examples of revenue management as calculated risk-taking, and the quality of the underlying cancellation forecast (by channel, by lead time, by rate type) directly determines how much upside can be captured safely.

Related

Closely tied to Wash (Cancellation Wash), No-show, Cancellation Rate, and Unconstrained Demand. Channel-level overbooking is often managed through Stop Sell and availability controls in the Channel Manager rather than at the property total.