THE NUMBERS, EXPLAINED
How to use this calculator.
Illustrates one supplied two-band policy; no legal entitlement or enforceability is inferred. Charge is based on booking total, not deposit.
Start with your inputs
Enter booking total (currency), deposit already paid (currency), notice before arrival (hours), full-refund cutoff (hours), late-cancellation charge (% of booking). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Booking total (currency) | 500 |
| Deposit already paid (currency) | 200 |
| Notice before arrival (hours) | 48 |
| Full-refund cutoff (hours) | 24 |
| Late-cancellation charge (% of booking) | 50 |
A worked example
With the example inputs above, cancellation charge (currency) is 0. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Cancellation charge (currency) | 0 |
| Refund of deposit (currency) | 200 |
| Additional amount due (currency) | 0 |
How this is calculated
Cancellation charge (currency)
Apply the supplied full-refund cutoff inclusively.
Refund of deposit (currency)
Refund deposit above the cancellation charge.
Additional amount due (currency)
Charge the portion not covered by the deposit.
Symbols and units
- a
- Booking total (currency)
- b
- Deposit already paid (currency)
- c
- Notice before arrival (hours)
- d
- Full-refund cutoff (hours)
- e
- Late-cancellation charge (% of booking)
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
Illustrates one supplied two-band policy; no legal entitlement or enforceability is inferred. Charge is based on booking total, not deposit.
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?
Cancellation charge (currency); Refund of deposit (currency); Additional amount due (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: Illustrates one supplied two-band policy; no legal entitlement or enforceability is inferred. Charge is based on booking total, not deposit.
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 →