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Hotel room blocks: how they work for teams, weddings and groups

A room block is a set of rooms a hotel holds for your group at an agreed rate until a cutoff date. It is the standard way teams, wedding parties and companies book 9 or more rooms. The details in the contract decide whether it saves you money or costs you.

Updated Oct 25, 2026ExplainerRoom blocksContracts2 sources

Key facts

Typical trigger
About 9 or more rooms per night
Two kinds
Courtesy block (guests pay, little or no penalty) and contracted block (you guarantee a minimum)
Key terms
Rate, cutoff date, attrition, cancellation schedule, rooming list

Courtesy block or contracted block

Courtesy block Contracted block
Who pays Each guest books and pays Guests book, but the organizer guarantees a minimum
Penalty if rooms go unused Usually none; unbooked rooms are released at the cutoff Attrition fee for rooms below the agreed percentage
Best for Weddings, club teams where families book their own rooms Schools and companies paying for everyone, large events

The terms that matter

  • Cutoff date. The hotel holds the rooms and the group rate until this date. After it, the hotel can release and resell unbooked rooms.
  • Attrition. The share of the block you must fill to avoid a penalty. Brown University's procurement guidelines give a clear example: on a 20-room-night block with 80% attrition, you must use 16 room nights; if you use 12, you pay for the 4 short. Brown tells its departments to keep attrition at or below 80% and to try to remove it on small blocks.
  • Cancellation schedule. Penalties often rise as the date gets closer. Brown's guide shows a schedule that goes from 25% of room revenue 120 to 91 days out to 80% inside 30 days.
  • Rooming list vs. individual reservations. With a rooming list, the organizer sends the hotel every guest's name. With individual reservations, guests book through a link or a code.
  • Comp rooms. Some hotels offer one free room for a set number of paid room nights. Ask; it is common in group sales but not guaranteed.
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What to negotiate

  1. Attrition at 80% or lower, or none for a small block.
  2. A cutoff date as late as possible, ideally after your team's qualifying game.
  3. A rate that is at least as good as the public rate, with a clause that lets guests book a lower public rate without hurting your count.
  4. Free breakfast, bus parking, a meeting room or a late checkout for game days.
  5. The right to reduce the block without penalty up to a set date.

When not to use a block

For a few rooms, or when public rates are already low, booking standard rooms with free cancellation on a booking site is simpler and often cheaper. Check the public rate for your dates before you sign anything.

Frequently asked questions

How many rooms do you need for a hotel room block?

Many hotels start group rates at about 9 or 10 rooms per night, but policies vary by hotel.

What is an attrition clause?

The minimum share of the block you must use. If your group books fewer rooms, you pay a penalty for the shortfall.

What happens after the cutoff date?

The hotel can release unbooked rooms back to general sale, and late guests may not get the group rate.

Is a courtesy block free?

Usually there is no penalty for unused rooms, but the hotel may hold fewer rooms and release them earlier.

Sources

  1. Brown University Procurement: Hotel Room Block Agreements Guidelines (2023)
  2. Joy: What is an attrition clause in a hotel block?

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