Hotel Group Block Washout Calculator

Group blocks wash out below pickup target — calculate attrition revenue recovery.

Contracted room nights

Picked-up room nights

Group rate / night

Attrition allowance %

Attrition charge %

Replacement revenue / room

Net attrition owed by group

$1,375

Rooms washed out

Replacement revenue captured

$825

How the math works

Rooms washed = allowed pickup − actual. Attrition = rooms × rate × charge. Net = attrition − replacement.

400 × 80% = 320 allowed − 310 picked = 10 washed × $220 = $2,200 − $825 replacement = $1,375 net.

How to Use

Enter contracted room nights.
Enter actual picked-up room nights.
Enter group rate per night.
Enter attrition clause % (allowed drop-off).
Enter attrition charge %.
Enter replacement revenue per room.
Read attrition recovery.

Frequently Asked Questions

What is washout?

Group book blocks X rooms at negotiated rate for specific dates. 'Pickup' = rooms actually booked by group members. Pickup below block = washout. Hotel loses revenue from unfilled rooms (opportunity cost — could have sold to other guests at public rate). Attrition clause: group pays penalty for pickup below threshold (typically 80-85% of block). Common issue in meetings/events industry.

Typical attrition terms?

Contract specifies: block, pickup requirement (75-85% of block), attrition charge on shortfall (70-100% of contracted rate per unfilled room). Cumulative basis (total block vs pickup) or daily basis (per-night pickup vs per-night block). Daily is hotel-friendly. Industry standard: cumulative at 80% threshold. Group blocks for shoulder/off-season: more generous; peak season: stricter.

Resell mitigation?

Hotel has duty to mitigate — attempt to resell unfilled rooms at public rate. If resold: hotel collects double (group attrition + public rate). If unsold: group pays attrition, hotel loses no revenue. Typical resell: 40-70% of washed-out rooms sell to transient market. Hotel's attrition entitlement: original contract loss minus replacement revenue. Accurate tracking important for fair billing.

Group pickup prediction?

Historical pickup by group type: association 75-85%, corporate 85-95%, wedding 80-90%, conference 70-85%. Time to event: closer = more accurate. 60 days out: 60-75% of final. 30 days: 85-95%. 7 days: 95-100%. Revenue management teams monitor pickup weekly and manage attrition — call groups to remind, add transient availability when pickup weak. Sophisticated hotels recover 70-85% of gross attrition opportunity.