How to use the No-Show Revenue Loss Calculator
A no-show holds a table that nobody else can use, so the revenue for that seating slot simply disappears. This calculator multiplies your monthly reservations by your no-show rate to get the number of no-shows, then multiplies by the average check to show the revenue you lost in a month. Any seats you refilled with walk-ins are subtracted, so only the truly empty seats count as a net loss.
When a sale disappears, the food cost and other sales-driven costs behind it never leave the bank account either. That is why the cash actually lost is smaller than the revenue lost. Enter a variable cost ratio and the tool separates revenue lost from profit lost. The annual figure is the monthly figure shown on screen multiplied by 12, so checking it by hand gives the same number.
If you are weighing a deposit or a cancellation fee, compare this loss against the reservations you may give up once a deposit is required. No-show rates swing widely by day of week, season and booking channel, so pull the actual numbers from your reservation system rather than using a rule of thumb.
The formula follows the standard reservations x no-show rate x average check approach and this page was written as of September 2026. Results are for reference only; deposit and cancellation terms should be reviewed with your own advisor and state consumer protection rules before you publish them.
Frequently Asked Questions
No. If that table generated revenue anyway, it is not lost. The calculator removes the backfilled share from the no-show count and treats only the remaining reservations as a net loss. Leave the backfill rate at 0% if none are refilled.
It is the monthly revenue loss shown on screen multiplied by 12. The rounded monthly value is reused, so multiplying it yourself returns the same number. If your business is highly seasonal, run the calculation month by month.
Because the food and other variable costs behind that sale are never incurred. Profit lost is the revenue lost minus the variable cost ratio you entered.