Out of Service (OOS)
Out of Service (OOS) is a housekeeping/front-office status for a room that is temporarily unsellable for a short-term, minor reason — a lightbulb replacement, deep clean, touch-up paint, or maintenance expected to be resolved the same day. Crucially, in most PMS conventions an OOS room remains in the hotel's available room count, unlike an Out of Order (OOO) room, which is removed from inventory entirely.
OOS vs. OOO
- Out of Service — short, minor issue; room stays in available inventory; expected back the same day; occupancy and RevPAR denominators are unaffected.
- Out of Order — serious issue (flood damage, renovation); room is removed from sellable inventory; the denominator for occupancy and RevPAR shrinks.
The distinction is not cosmetic: because OOO reduces the number of available rooms, moving rooms between the two statuses changes reported Occupancy Rate, RevPAR, and comp-set benchmarks.
Example
A 150-room hotel has 5 rooms under renovation (OOO) and 3 rooms flagged for same-day maintenance (OOS). Available rooms = 145 (150 − 5 OOO); the 3 OOS rooms still count. With 130 rooms sold, occupancy is 130 ÷ 145 = 89.7%. Had those 3 rooms been misclassified as OOO, reported occupancy would rise to 91.5% without a single extra booking.
Why it matters
Sloppy OOS/OOO discipline distorts performance data: hotels can inadvertently (or deliberately) flatter occupancy and RevPAR by flipping rooms to OOO, which undermines STR Report benchmarking and internal forecasting. Distribution is affected too — a room stuck in OOS at a sold-out hotel is revenue permanently lost, and on compression nights an unresolved OOS room can be the difference between accommodating a booking and walking a guest. Best practice: OOS statuses should carry a reason code and an expected return time, and be reviewed at every morning house-count meeting.
Related
See Out of Order (OOO), House Count, Occupancy Rate, and RevPAR (Revenue per Available Room).