Restaurant No-Show Revenue Loss Calculator

Estimates how much revenue and margin a restaurant loses each month and year to reservations that never arrive, based on your own booking volume and check size.

Your estimate

No-show parties per week...

Revenue lost per month...

Revenue lost per year...

Contribution margin lost per year...

Estimates only. Assumptions are listed below, and you can change every input.

Most restaurants know no-shows are a problem but very few have put a dollar figure on it. A table held for a party of four that never arrives is not just an empty table for the night; it is a seating you turned away, a server you scheduled and a prep list you built for guests who are not coming. Without a number, it is hard to decide whether a deposit policy, a waitlist push or a confirmation routine is worth the effort.

This calculator takes your weekly reservation count, average party size, no-show rate and average check, then subtracts the tables you manage to refill with walk-ins or a waitlist. The result is a plain revenue estimate for the month and the year, plus the contribution margin lost after food and beverage costs. It does not add any hidden multipliers; every number comes from what you enter.

How to use this tool

Enter your weekly reservation count and average party size from your booking system or host stand log.
Set your no-show rate and average check per guest using last month's real numbers rather than a guess.
Adjust the refill rate to match how often you actually reseat a no-show table, then read the monthly and annual loss.

What the math assumes

Assumes a year has 52 booking weeks and a month is one twelfth of that year; seasonal swings are not modeled.
Assumes every no-show party would have spent the average check per guest times the average party size.
Assumes 30% of no-show tables get refilled unless you change the refill rate; tables that are refilled are not counted as lost.
Assumes a 65% contribution margin unless you change it, so margin lost is simply revenue lost times that percentage.
Does not include labor already scheduled, prepped food that goes to waste, or guests you turned away because the table looked booked.

Frequently asked questions

How do I find my restaurant's actual no-show rate?

Divide the number of reservations that neither arrived nor cancelled by the total number of reservations in the same period. Most reservation platforms report this directly; if yours does not, a few weeks of host stand notes will give you a usable figure.

Why does the calculator subtract tables I refill?

A no-show only costs money if the table stays empty. On a packed Saturday with a waitlist you may reseat most of them, while on a Tuesday you probably will not, so the refill rate lets you reflect your real situation instead of counting every no-show as a total loss.

Should I use revenue or contribution margin to judge the loss?

Revenue shows the size of the problem, but contribution margin is closer to what actually left your pocket, since you did not serve the food. Use margin when comparing against the cost of a fix such as a deposit policy or a confirmation service.

Link to this toolhttps://holdtabl.com/tools/no-show-revenue-loss/

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More free tools from HoldTabl

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Reservation Deposit Amount Calculator: Suggests a per-guest and per-party reservation deposit that covers the margin a restaurant loses on a no-show without becoming too large for guests to accept.

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