Hostels price a bed in a four-share differently from a bed in a sixteen-share, and the gap is often larger than the difference in comfort suggests. The pricing follows the economics of the room.
Revenue per square metre drives the base price
A hostel's fixed costs are tied to the building, so the operator's core question is how much income each room can generate at full occupancy.
Packing more beds into the same floor area raises that ceiling substantially, which allows the per-bed price to fall while total revenue from the room rises.
Smaller dorms generate less per square metre, so each bed has to carry more of the building's cost, and the price rises accordingly.
Occupancy risk is concentrated in small rooms
A sixteen-bed dorm rarely stands empty, since a single booking activates it and partial occupancy is normal. The revenue is diversified across many independent customers.
A four-bed room either fills or it does not, and an unsold bed in a small dorm is a larger proportional loss than the same bed in a large one.
Operators price that risk in, which is one reason small dorms discount faster at the last minute while large ones hold their price.
Servicing cost does not scale with beds
Cleaning a room takes a fixed amount of time for the space itself plus a smaller amount per bed, so the cost per guest falls as the room grows.
Linen, key management, check-in and the bathroom queue all follow similar patterns, with the per-person overhead dropping as the dorm gets larger.
The saving is real, and part of it is passed to the guest in the form of a cheaper bed rather than retained entirely by the operator.
Private rooms sit in a different market
Hostels that offer private rooms are competing with budget hotels and guesthouses rather than with other hostels, and they price against that comparison instead.
This is why a private double in a hostel can cost several times a dorm bed in the same building despite sharing the same kitchen and common room.
For two people travelling together the comparison is worth running properly, since two dorm beds sometimes exceed the price of a private room.
What the extra actually buys
Paying up from a large dorm to a small one buys fewer disturbances, a shorter bathroom queue and a better chance of sleeping through the night.
It does not buy quiet in any guaranteed sense, since a single restless roommate has the same effect in a four-bed room as in a larger one.
Travellers who value sleep specifically tend to find that a female-only or small dorm at a modest premium is where the value sits, rather than at either extreme of the price list.