Last updated: Jan 26, 2026 · Methodology v2026.01.1
Missed Appointment Revenue Calculator
Quantify revenue lost from late cancellations and unfilled slots.
← More calculatorsWhat you'll need
- Average ticket value and monthly late cancellations.
- Fill rate for backfilling slots.
What you'll get
- Monthly and annual revenue loss ranges.
- Profit impact using gross margin.
Worked example
How the number is worked out
A mobile dog groomer losing slots to last-minute cancellations.
Starting from
Working
A cancellation only costs anything if the slot stays empty. At a 35% refill rate two thirds of them do — which makes the refill rate the number worth watching, not the cancellations.
How this was calculated
Methodology v2026.01.1. These estimates are directional and depend on inputs and assumptions.
- Late cancellations per month × average ticket value.
- Fill-rate reduces the net missed appointments count.
- Gross margin converts revenue impact into profit impact.
- Annualized to show the yearly cost of missed slots.
FAQ
What is a missed appointment in this context?
A late cancellation or empty slot that does not get filled.
Are these estimates exact?
No. They are directional so you can see the size of the leak before refining assumptions.
Can I change the assumptions?
Yes. Adjust the inputs to reflect your business and rerun the numbers.
Why use a range instead of a single number?
Ranges reflect uncertainty and help you stress-test best and worst cases.
Does this include profit?
Use the gross margin input to translate revenue impact into profit impact.
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