Published by Clinic Admin Tools UK · Independent practice-admin content · Not clinical advice
Missed appointment loss calculator
Estimate revenue left on the table when patients do not attend or last-minute gaps are not refilled.
Introduction
No-shows and late cancellations have a direct effect on clinic revenue. Multiplying missed slots by a typical session fee gives a rough picture of opportunity cost over a week or month.
This does not include goodwill or long-term retention effects—only a simple revenue snapshot for planning.
Calculator
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(£)
Results
Context and how to use this
Putting a number on empty slots helps justify reminders, waitlist backfill processes, or policy changes. The tool multiplies missed slots by a fee you judge realistic for that diary.
Separate structural gaps (no demand) from DNAs if your improvement projects target different levers.
Common questions
- List price or discounted fee?
- Use the fee you would most often have earned for that appointment type. Blended averages are fine for a monthly snapshot.
- Is this lost profit?
- No—this estimates lost gross revenue. Net loss would subtract variable costs you avoid when the slot is empty.
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