THE NUMBERS, EXPLAINED
How to use this calculator.
Recovery is measured by money, not customer count. Cohorts use equal observation windows and recoveries exclude duplicate payments.
Start with your inputs
Enter initially failed charges by cohort (currency), gross successful recoveries by cohort (currency), retry processing fees by cohort (currency), retry attempts by cohort. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Initially failed charges by cohort (currency) | 1000,500 |
| Gross successful recoveries by cohort (currency) | 600,400 |
| Retry processing fees by cohort (currency) | 30,20 |
| Retry attempts by cohort | 100,50 |
A worked example
With the example inputs above, value recovery rates by cohort (%) is 60, 80. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Value recovery rates by cohort (%) | 60, 80 |
| Net recovered receipts (currency) | 950 |
| Unrecovered failed value (currency) | 500 |
| Processing fees per retry attempt (currency) | 0.333333 |
How this is calculated
Value recovery rates by cohort (%)
Divide recovered charge value by initially failed value.
Net recovered receipts (currency)
Deduct all retry processing fees from recovered receipts.
Unrecovered failed value (currency)
Subtract recoveries from originally failed charges.
Processing fees per retry attempt (currency)
Divide all retry fees by attempt count.
Symbols and units
- a
- Initially failed charges by cohort (currency)
- b
- Gross successful recoveries by cohort (currency)
- c
- Retry processing fees by cohort (currency)
- d
- Retry attempts by cohort
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Recovery is measured by money, not customer count. Cohorts use equal observation windows and recoveries exclude duplicate payments.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Value recovery rates by cohort (%); Net recovered receipts (currency); Unrecovered failed value (currency); Processing fees per retry attempt (currency). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Recovery is measured by money, not customer count. Cohorts use equal observation windows and recoveries exclude duplicate payments.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: Describe and Identify Cost Drivers ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →