What this calculator includes
- Free, private calculations without signup.
- Exact decimal arithmetic with validated inputs and transparent assumptions.
- Editable inputs, reset example and global currency labels; no exchange-rate conversion.
- Attendance-adjusted visits capped by your actual spare capacity.
How to use this calculator
- Choose a completed-appointment cohort and a consistent rebooking window.
- Estimate attendance from actual returned visits, separately from checkout rebooking.
- Enter spare slots for the period when those visits would occur.
- Compare added contribution with the cost of your retention effort.
Formula and calculation boundaries
Extra bookings = completed baseline appointments × (target rate − current rate). Expected attendance = extra bookings × attendance rate. Delivered visits = minimum of expected attendance and spare capacity.
Contribution per visit = price × (1 − payment fee) − avoidable cost. Added contribution = delivered visits × contribution per visit. Fractional visits describe expectations, not guaranteed whole bookings.
Checked example
With 200 completed visits, rebooking rising from 40% to 60% creates 40 additional bookings. At 80% attendance, 32 visits are expected; 25 spare slots cap delivery at 25. At an $80 ticket, $25 cost and 3% fee, added contribution is $1,315.
These are hypothetical inputs, not market benchmarks. Change the inputs to use your own records.
Avoid double counting
This models one follow-up visit per extra rebooking, not compound lifetime value. It assumes the visits are incremental rather than merely moved earlier. Fixed overhead is unchanged; new campaign costs must be subtracted separately. Do not annualize a cohort without its visit timing.
Assumptions and limits
This models one follow-up visit per extra rebooking, not compound lifetime value. It assumes the visits are incremental rather than merely moved earlier. Fixed overhead is unchanged; new campaign costs must be subtracted separately. Do not annualize a cohort without its visit timing.
Frequently asked questions
Is rebooking the same as retention?
No. Rebooking is a scheduled future visit; retention records actual returns. Attendance is modeled separately.
Why does capacity reduce the result?
Only extra visits that fit available delivery capacity are counted. Additional demand is reported but excluded from contribution.
Does this predict repeat revenue?
No. Target rate and attendance are your assumptions. It models one subsequent visit, not a guaranteed recurring stream.
What if contribution is negative?
The calculator keeps the negative result visible. Increasing visits cannot repair an unprofitable service price.
Method references
Check the full monthly business target
Check whether your contribution can fund overhead, owner pay and your profit target, then compare the required sales with your available working capacity.
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