If you have ever organized a wedding, a sports tournament, or a corporate offsite, you have probably nodded along while a hotel sales manager rattled off terms like “attrition,” “cut-off date,” and “courtesy block” — and then quietly wondered what any of it meant. You are not alone. Hotel group contracts have a vocabulary of their own, and misunderstanding even one term can cost your group real money.
This guide from groupRooms breaks down the most important hotel room block terminology in plain English, so you can read a contract with confidence before you sign.
What Is a Hotel Room Block?
A hotel room block is a set of rooms a hotel holds for your group at a negotiated rate for a specific window of dates. When you arrange a block through a group hotel booking request, the property agrees to reserve rooms — typically five or more — for your guests to book individually at a discounted group rate, rather than the standard nightly price.
The block protects you in two directions. Your guests are guaranteed a room and a price, and the hotel is guaranteed a predictable chunk of occupancy. The trade-off is that you make commitments, and those commitments are governed by a handful of terms you need to understand.
Attrition: The Clause That Protects the Hotel
Attrition is the penalty a hotel charges when your group books fewer rooms than you committed to. If you block 30 rooms and only 22 are picked up, the hotel has held 8 rooms it could have sold elsewhere — and an attrition clause lets it recover some of that lost revenue.
Most contracts build in an attrition allowance, often 80% to 90%, meaning you are on the hook only if pickup falls below that percentage of the block. The penalty is usually expressed as a percentage of the room rate for each unbooked room-night. Before you sign, confirm three numbers: the minimum pickup, the deadline for releasing rooms without penalty, and how the charge is calculated. A generous allowance can make a modest block far safer than it looks on paper.
Cut-off Dates: The Deadline That Releases Rooms
A cut-off date is the last day your guests can book at the negotiated group rate. After that date, any unbooked rooms in the block are released back to the hotel’s general inventory, and the group rate usually disappears.
This is the single most important date for your group to remember, because it is the moment the discount quietly expires. Organizers routinely set the cut-off two to four weeks before arrival, then remind their guests repeatedly. Guests who wait until after the cut-off almost always pay a higher rate — and you cannot always get those rooms back. When you compare group hotel rates, ask every property for its cut-off policy up front.
Courtesy Blocks vs. Contracted Blocks
The term courtesy block refers to a smaller, low-risk arrangement: the hotel holds a limited number of rooms at a group rate without requiring you to sign a contract or guarantee a minimum. There is usually no attrition exposure, but there is also no guarantee the rooms will still be there if demand spikes.
A contracted block, by contrast, is a formal agreement with a guaranteed room count, negotiated rates, and the attrition and cut-off terms described above. Bigger groups with firm headcounts usually end up contracted, because that is where the deepest group hotel discounts live. Smaller or less certain groups often start with a courtesy block and convert it once numbers firm up.
Other Terms Worth Knowing
- Pickup. The number of rooms actually booked against your block. Hotels track pickup against your commitment to decide whether attrition applies.
- Rooming list. A roster of guest names and room assignments you send the hotel before arrival, so check-in runs smoothly.
- Complimentary rooms. Rooms many hotels add to a block as a booking incentive — often one comp room for every 20 to 25 booked.
- Rack rate. The hotel’s standard, undiscounted nightly price — the benchmark your group rate is measured against.
How groupRooms Simplifies the Whole Vocabulary
None of this jargon has to be navigated alone. When you submit a single request through groupRooms, competing hotels respond with their best group hotel rates for your block — and their contracts, attrition allowances, and cut-off dates land side by side for easy comparison.
Before you commit, take a few minutes to learn how to negotiate group hotel rates so you can push on the right terms. Then submit your RFP and let hotels compete for your group hotel rooms. Understanding the vocabulary is the first step; groupRooms handles the rest.
