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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.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Hotel Group Block Washout Calculator is built to give a quick, browser-based estimate for hotel group block washout. Group blocks wash out below pickup target — calculate attrition revenue recovery. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

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How to interpret the hotel group block washout result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this hotel group block washout estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

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.