Length of Stay (LOS)
In hotel revenue management, length of stay (LOS) is the number of consecutive nights a guest occupies a room on one reservation, and average length of stay is that figure across all your bookings in a period.
It is the metric that explains why two properties with the same occupancy and the same rate can have very different costs, and very different weeks.
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What is length of stay?
Nights per reservation, counted per booking and averaged across the book of business.
Average length of stay is total room nights divided by the number of reservations. Forty-six room nights from twenty reservations is an ALOS of 2.3. The calculation is trivial and the interpretation is where the value sits.
What makes it matter is that a stay has fixed costs and a night has variable ones. Every reservation carries a check-in, a check-out, a full turnover clean, a set of linen, a booking transaction and a commission calculation, whether it lasts one night or five. Add a night to an existing stay and you add a light service, some consumables and very little else.
So the same room nights delivered through fewer, longer reservations cost you less to produce. That is the whole economic argument, and it is why ALOS deserves a place alongside occupancy and rate rather than being treated as a curiosity.
It should be read in splits rather than as one number. ALOS varies enormously by segment, by channel, by season and by day of week, and a property-level average blends a midweek corporate pattern with a weekend leisure one into a figure describing neither.
Resources: Minimum length of stay · Booking window · ADR
How length of stay works in practice
The instructive comparison is a longer stay at a lower rate against short stays at a higher one.
Worked example. A 46-room inn compares three separate one-night stays at $185 with one three-night stay at $178 a night. Revenue is $555 against $534, so the short stays look $21 better. Now count the rooms side. Three arrivals means three full turnover cleans at about $28, or $84. One arrival means one turnover clean plus two stayover services, roughly $28 plus $24, or $52. Net, the short stays return $471 and the longer stay returns $482. The lower rate earns $11 more, and it did so while occupying one reservation's worth of administrative effort instead of three.
That margin is small and the direction is the point. A rate comparison alone would have chosen wrongly.
The everyday use is diagnostic. ALOS moving without occupancy moving tells you the shape of your business has changed. Rising ALOS with flat occupancy means fewer, longer bookings, which usually costs less to service and concentrates your risk in fewer reservations. Falling ALOS with flat occupancy means more turnovers for the same revenue, which your housekeeping team will have noticed before your reports did.
It also sets up the restriction decision. A property whose weekend ALOS is 1.2 while its Fridays sit empty has a specific, addressable problem, and minimum length of stay is the tool aimed at it. Without the ALOS split by day of week, that problem is invisible.
Resources: Net ADR yield · Rate calendar
Why length of stay matters for independent hotels
Because turnover cost lands harder on a small property than anywhere else.
A 46-room inn typically runs a housekeeping team sized for a normal day, not a peak one. A weekend of 46 one-night stays means 46 full turnovers across two mornings, which is a staffing problem before it is a financial one, and the usual solutions are overtime or a rushed clean that shows up in reviews.
There is also the acquisition side. Commission, booking engine fees and whatever you spent attracting a guest are paid per reservation, not per night. Three bookings cost you three times the acquisition of one, and your net ADR yield on a long stay is quietly better than on a short one at the same rate.
The honest caveat is that longer is not always better and the exception is expensive. A three-night stay booked at a soft-season rate that runs across a compression Saturday has blocked your single most valuable night for two nights of ordinary business. That is a displacement question, and it is the reason restrictions and rate fences exist.
Resources: Revenue management for independent hotels
How to use length of stay at your property
- Calculate ALOS as room nights divided by reservations, for a trailing year.
- Split it by day of week and season. A single average blends two different businesses at most properties.
- Split it by channel and segment as well. OTA, direct and corporate stays behave differently.
- Attach a cost to a turnover. Until you know what an arrival costs to service, the rate comparison will mislead you.
- Use the weekend split to decide on restrictions. Low weekend ALOS beside empty shoulder nights is the case for a minimum stay.
- Watch for long stays crossing your best dates. A cheap stay through a compression night is the expensive version of a good metric.
What length of stay will not tell you
It says nothing about rate. A rising ALOS built on a heavily discounted weekly rate can be worse business than a shorter, fuller-priced pattern, and the metric moves in the direction that looks good either way.
It cannot see what a long stay blocked. A guest occupying a room from Thursday to Monday at a modest rate has taken your Saturday off the market, and nothing in ALOS records the higher-rated booking that could not be accepted.
And a property-level figure is close to meaningless on its own. Blending a two-night weekend leisure pattern with a one-night midweek corporate one produces an average that describes neither and supports no decision.
How ampliphi approaches length of stay
Worth stating clearly, because it is a common question when evaluating any pricing system. Ampliphi does not price by length of stay. The everyday rate suggestion is demand-based, built on booking pace and occupancy, and it covers your base rate and the differential between room types.
Length-of-stay pricing, where a two-night booking gets a different nightly rate from a one-night booking on the same date, is a separate discipline with its own maintenance burden, and it is not what the suggestion does. Neither does ampliphi set minimum stays or other availability controls. Those remain in your PMS and channel manager and remain your decisions.
Where the two meet is that a correctly priced date is easier to shape. A compression Saturday priced at what the market will bear makes a cheap long stay across it far less likely in the first place. You approve every rate before it publishes, and ampliphi runs on top of the PMS you already use.
Key takeaways: length of stay
- Nights per reservation. Average length of stay is room nights divided by reservations.
- Stays carry fixed costs and nights carry variable ones, so fewer longer stays cost less to produce.
- A lower nightly rate over three nights can beat a higher rate over three separate stays once turnover cost is counted.
- Read it split by day of week, season, channel and segment. The blended figure describes nothing.
- Turnover cost lands hardest on small properties, where housekeeping is sized for a normal day.
- Longer is not always better. A cheap stay across a compression night is the expensive case.
Frequently asked questions about length of stay
What is a good average length of stay for a hotel?
There is no target worth importing, because the spread between property types is far wider than any average is useful across.
An urban property serving business travel will run close to 1.5. A resort in high season can run past 4. A rural weekend property runs two different numbers depending on the day of the week you look at. None of these is better than the others, they are descriptions of different businesses.
Your own splits are the useful benchmark. Calculate ALOS by day of week and season from a trailing year, then watch whether it moves. A change in your own figure carries information. A comparison against a published average does not.
How do I calculate average length of stay?
Total room nights divided by total reservations for the period.
If 340 reservations produced 782 room nights in a quarter, ALOS is 2.3. The arithmetic is straightforward and the trap is in the denominator: count reservations, not guests, and decide whether cancelled bookings are excluded before you start.
Then repeat it by segment and by day of week. That takes one extra export and turns a number you cannot act on into several you can.
Is a longer stay always better?
No, and the exception costs real money.
Longer stays are cheaper to service and cheaper to acquire, which is the general case in their favour. The exception is when a long stay at an ordinary rate occupies a date that would have sold at a premium, which is most common when a multi-night booking runs across a compression night.
That is a displacement question rather than a length-of-stay one. The remedy is pricing the peak date correctly and, where necessary, using restrictions, so that a long booking crossing it pays something closer to what that night is worth.
How does length of stay affect my costs?
Through the difference between what an arrival costs and what a night costs.
An arrival brings a full turnover clean, fresh linen throughout, a check-in and check-out, a booking transaction and a commission calculation. An additional night on an existing stay brings a light service, some consumables and no administration.
At a small property the labour side dominates. Forty-six one-night stays over a weekend is a materially harder operation than twenty-three two-night stays delivering the same room nights, and the difference shows up in overtime, in rushed cleans and eventually in reviews.
Does length of stay differ by channel?
Usually yes, and the pattern is worth knowing before you make channel decisions.
Direct and repeat guests often stay longer, OTA bookings skew shorter, and corporate or negotiated business tends to cluster around a consistent midweek pattern. Those differences change what a channel is actually worth, because acquisition cost is paid per reservation.
Work it into your net ADR yield per channel. A channel with a 17 percent commission and a three-night average can be better business than one at 12 percent delivering single nights, and the headline commission rate will never show you that.
Related terms
Minimum length of stay
A rule requiring a number of consecutive nights. The control aimed directly at a low weekend ALOS beside empty shoulder nights.
Booking window
The gap between booking and arrival. Short-lead and long-lead bookings tend to have different stay patterns, so the two metrics read together.
ADR
The average rate achieved per room sold. Read beside ALOS, because a rising stay length bought with a discount is not automatically progress.
Net ADR yield
The rate you keep after commission and distribution cost. Acquisition is paid per reservation, so longer stays yield better at the same rate.
Displacement analysis
Whether accepting a booking earns more than what it pushes out. The framework for the case where a long stay crosses your best date.