What is a room block? Hotel group blocks explained for travel agents

A room block is a set of hotel rooms held for one group at a group rate, for guests to book until a set date. Meeting Professionals International (MPI) defines it as a reservation for a set of hotel rooms (often 10+), typically with a negotiated group rate and cut-off date. Unbooked rooms go back to the hotel at that cutoff date.

Below: how a block works, how to set one up at the big chains, cutoff dates and releases, and a worked example. Then courtesy vs contracted blocks, and how blocks compare with cruise and air group space.

What is a room block?

A room block is inventory a hotel sets aside for a named group, priced at a group rate, for set dates. Hotels run blocks in their property systems. Oracle's OPERA hotel software, for example, gives every block a header with a block code, arrival and departure dates and a default rate.

Each hotel sets its own block rules. One IHG hotel, Staybridge Suites Franklin, defines its wedding courtesy block as 10 or more rooms removed from General Sale to the public and held specifically for your group to book. That is one property's policy, not an industry standard. This article uses it as a worked example throughout.

Guests usually book their own rooms inside the block. Hilton's attendee website lets planners give guests the flexibility to reserve their own rooms within the room block at your group's special rate. The IHG property above sends a group code and booking link with instructions.

How does a room block work?

1. You request the block. Hilton lets you book and confirm up to 25 guest rooms online. For more, you contact the hotel directly or submit a pricing request.
2. The hotel holds rooms at the group rate. It sets the rate, the dates and the rules.
3. Guests book against the block. The rooms guests book out of the block are its "pickup". (That is our plain-language reading of how hotels use the word. No source we found defines it formally.) The IHG property, for instance, adds a free shuttle if the group picks up 10 or more guestrooms.
4. The cutoff date arrives. Rooms nobody booked are released back to general inventory.

How to set up a room block at Hilton or IHG, step by step

The chains route small and large blocks differently.

1. Count your rooms. IHG offers online bookings for 1-9 rooms. For a meeting, event or block of 10 or more rooms, it sends you to the IHG Group Center or its online group booking and RFP (request for proposal) site. Hilton books up to 25 rooms online and offers help booking 10+ rooms.
2. Book or request the block. Under the online limit you confirm it yourself. Above it, the hotel's sales team quotes the rate and terms.
3. Get the rate code. Hilton puts your group's unique special rate code in the block confirmation email.
4. Share the booking link. Hilton says you'll need to book a block of rooms before creating an attendee website, then you send the link to guests.
5. Track pickup to the cutoff. Chase guests who haven't booked before each reduction date.

What is the cutoff date?

It is the date the hotel releases unbooked block rooms for general sale. OPERA describes it as the date when the booking room block will be released back into general inventory if not finalized. If no cutoff is entered, OPERA uses the arrival date as the cutoff date.

Each hotel sets its own. The IHG property releases all unreserved rooms in the block 30 days prior to the wedding date. It also cuts the block by 25% at 60 days out. After cutoff, guests pay the prevailing retail rate and face minimum-stay rules.

Cancellations change sides at cutoff too. Before it, a cancelled room is kept in your block for another guest. After it, the room goes back to general reservations.

Fixed cutoff vs rolling release

Not every block releases all at once. In OPERA Cloud, a cutoff date means rooms not picked up with reservations by this date are returned to the house availability. A number of cutoff days instead releases the rooms one night at a time, so each night of the stay has its own release point.

Repeat groups work the same way. OPERA's tour series setup uses cutoff days as the number of days before the next tour that all the rooms for the tour must be filled before unallocated rooms are released. Ask the hotel which method your block uses, since a rolling release can take back your first night before the last.

Worked example: a wedding courtesy block

Illustrative. The guest numbers are made up. The dates and percentages are the IHG property's published policy.

Nobody pays for the 8 rooms that were never booked, because a courtesy block carries no performance obligation. Under a contracted block with an 80% minimum, the same 12 rooms out of 20 would fall short and could trigger attrition damages.

Courtesy block vs contracted block

The difference is who carries the risk of empty rooms.

A courtesy block is a favor. A contracted block is a promise. (The "Typical fit" row is practical guidance, not a hotel rule.)

Wedding blocks vs corporate blocks

Practical guidance, built on the terms above. Your hotel's contract decides.

How do room blocks link to attrition?

Attrition is the penalty side of a contracted block. Mews, a hotel software company, describes it as a contractual obligation that may require a group client to pay a fee when room use falls below the minimum in the contract. The clause can count pickup across all event nights or for each night. Thresholds and formulas are covered in what is attrition in group travel.

Room block vs group rate vs allotment

A block is the rooms. The rate is the price. Cruise and air group space works like a block, with the supplier's own deadlines. Attrition in group travel covers what happens when cruise and air groups shrink.

What are comp rooms in a block?

Comp (complimentary) rooms are free rooms a hotel grants based on how many rooms the group books. In OPERA, the number can be a fixed number or a number pro-rated on how many rooms are booked, counted per stay or per night. Its help text uses 1 complimentary room for each 100 rooms booked as an example of a ratio. The real ratio is whatever your contract says.

How to book a room block for a wedding or group

Practical guidance, not a hotel rule. These steps follow from the terms above.

1. Start with a courtesy block when guest numbers are a guess. No obligation means no bill for empty rooms.
2. Get every date in writing. Cutoff, block reductions, rooming list deadlines and the individual cancellation window. The IHG example charges one night plus tax for guest cancellations inside 48 hours.
3. Ask for pickup reports before each reduction date, and chase guests who haven't booked.
4. Read the attrition clause before signing a contracted block, and size the block to the guests you're sure of.
5. Set traveler payment dates ahead of the hotel's deadlines. See deposit and final payment schedules and travel payment plans.

Common room block mistakes

Practical guidance.

• Sharing the link late. Guests who haven't booked by a reduction date can shrink your block.
• Missing a rolling release. With cutoff days, the first night goes back before the rest.
• Signing a contract for a courtesy-style group. If numbers are a guess, a contracted minimum turns empty rooms into a bill.
• Ignoring individual cancellation rules. Guests still face the hotel's own cancellation window inside the block.

Related terms

• Attrition in group travel
• What is a FAM trip?
• Collecting group travel payments
• Deposit and final payment schedules
• Auto-cancellation
• Travel payment plans
• How to start a travel agency

How Tripdash helps with group payments

When your agency books the rooms itself, Tripdash Pay lets you send each traveler their own link to pay their share of the trip. See Tripdash Pay.

Sources

1. IHG (Staybridge Suites Franklin). Wedding blocks: information and policies, PDF dated March 4, 2022.
2. Hilton. Events: reserve room blocks, as checked October 2026.
3. Hilton. Attendee website, as checked October 2026.
4. Oracle. OPERA PMS 5.6 help: Block cutoff, as checked October 2026.
5. Oracle. OPERA PMS 5.6 help: Business block header, as checked October 2026.
6. Oracle. OPERA PMS 5.6 help: Complimentary rooms, as checked October 2026.
7. Mews. Hotel attrition: definition, clauses and risk mitigation, June 29, 2026.
8. Meeting Professionals International. Event planning terminology and definitions A to Z, checked October 22, 2026.
9. IHG. IHG Business Rewards: how to book, checked October 22, 2026.
10. Oracle. OPERA Cloud 22.3: View room availability for blocks using group rooms control, checked October 22, 2026.
11. Oracle. OPERA PMS 5.6 help: Tour series, checked October 22, 2026.
12. Norwegian Cruise Line. Group terms and conditions, Norwegian Central travel partner site, undated, checked October 22, 2026.
13. American Airlines Group and Meeting Travel. Group terms and conditions, version dated October 17, 2019, checked October 22, 2026.