Hotel Group Block Cost Calculator

Booking a hotel room block for a wedding, conference, or group trip? Enter the number of rooms blocked, nightly rate, number of nights, and your expected pickup (fill) rate to estimate total cost and potential attrition penalty.

Estimated Total Cost
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Rooms Expected to Fill—
Cost of Filled Rooms—
Attrition Shortfall (Rooms)—
Attrition Penalty Cost—
Total Estimated Cost—

About this calculator

Calculate total costs and potential attrition penalties for a hotel room block reserved for a group event, wedding, or conference.

Frequently Asked Questions

What is hotel attrition?

Attrition is the penalty a group pays when it doesn't fill enough of its contracted room block, usually a percentage of the unfilled rooms' revenue.

How is the attrition threshold set?

It's negotiated in your hotel contract, often 80-90% of the blocked rooms. Filling below that threshold typically triggers a penalty for the shortfall.

How can I avoid attrition penalties?

Negotiate a lower attrition threshold, block fewer rooms conservatively, or actively track and boost room pickup through reminders to attendees.