When planning a group event, conference, festival, or wedding, hotel contracts often include terms that can impact your budget if your room block doesn't fill as expected. One of the most important provisions to understand is the attrition fee clause. Knowing how attrition works can help organizers avoid unexpected costs and negotiate more favorable agreements.

What Is an Attrition Fee Clause?

An attrition fee clause is a contract provision that requires an event organizer to meet a minimum number of room nights within a hotel room block. If the group falls short of that commitment, the hotel may charge a fee for the unused rooms.

For example, if you contract for 500 room nights but attendees only book 400, the hotel may assess an attrition charge based on the 100-room-night shortfall. Hotels use these clauses to protect themselves from lost revenue after reserving inventory for a group.

How Are Attrition Fees Calculated?

Attrition fees vary by contract, but they’re typically based on a percentage of the revenue the hotel expected to earn from the unbooked rooms. Some agreements allow for a cushion—often 10% to 20%—before penalties apply.

A contract might state that if room pickup falls below 80% of the committed block, the organizer will owe a percentage of the lost room revenue. Additional factors, such as food and beverage spending or event timing, can also influence how fees are calculated.

How to Protect Yourself During Negotiations

Before signing any hotel contract, carefully review the attrition language and negotiate whenever possible. Consider requesting a lower room commitment, a larger allowable shortfall, or a sliding-scale penalty structure. It’s also helpful to regularly monitor room block pickup and adjust allocations if booking trends fall behind expectations.

Understanding attrition fee clauses upfront can help event planners, couples, and group organizers avoid costly surprises while ensuring their hotel partnership remains successful for both parties.