THE NUMBERS, EXPLAINED
How to use this calculator.
Cash timing is assumed compatible with payment dates; no interest or tax estimate. Owner draw is optional and can be entered as zero.
Start with your inputs
Enter planned nonworking weeks, weekly unavoidable business costs (currency), weekly planned owner draw (currency), expected receipts during leave (currency), cash already earmarked (currency), saving weeks before leave. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Planned nonworking weeks | 4 |
| Weekly unavoidable business costs (currency) | 300 |
| Weekly planned owner draw (currency) | 500 |
| Expected receipts during leave (currency) | 1000 |
| Cash already earmarked (currency) | 500 |
| Saving weeks before leave | 10 |
A worked example
With the example inputs above, leave funding requirement (currency) is 2,200. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Leave funding requirement (currency) | 2,200 |
| Additional reserve needed (currency) | 1,700 |
| Weekly saving target (currency) | 170 |
How this is calculated
Leave funding requirement (currency)
Deduct expected leave-period receipts from costs and owner draw.
Additional reserve needed (currency)
Deduct earmarked cash as well as expected receipts.
Weekly saving target (currency)
Spread the remaining reserve over saving weeks.
Symbols and units
- a
- Planned nonworking weeks
- b
- Weekly unavoidable business costs (currency)
- c
- Weekly planned owner draw (currency)
- d
- Expected receipts during leave (currency)
- e
- Cash already earmarked (currency)
- f
- Saving weeks before leave
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
Cash timing is assumed compatible with payment dates; no interest or tax estimate. Owner draw is optional and can be entered as zero.
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?
Leave funding requirement (currency); Additional reserve needed (currency); Weekly saving target (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: Cash timing is assumed compatible with payment dates; no interest or tax estimate. Owner draw is optional and can be entered as zero.
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 →