Tax-basis comparison
Compare commission on the full amount with commission after removing supplied or assumed tax.
Commission on full amount
$88.00- Commission excluding tax
- $80.00
- Full minus excluding-tax commission
- $8.00
- Excluding-tax basis
- $200.00
- Supplied tax
- $20.00
Illustrative calculation · AUD where amounts are shown.
See how the number is made.
The assumed-rate option rounds the excluding-tax basis to cents before applying commission, matching Trimsum’s calculation policy. Removing 10% of an inclusive amount is not the same as dividing by 1.10. The tool compares supplied assumptions; it does not determine tax treatment.
The working
With supplied tax: excluding-tax basis = full amount − tax. With an assumed rate: basis = full amount ÷ (1 + tax rate).
$220.00 with $20.00 supplied tax gives a $200.00 excluding-tax basis. At 40%, the two commissions are $88.00 and $80.00.
- AUD. Monetary results use nearest-cent rounding; exact half cents round away from zero.
- The supplied tax was removed from the full amount.
- This compares calculation assumptions; it does not decide tax treatment.
Use the calculation basis and rules you have agreed. A tool result is a working record; it does not establish an entitlement or send a payment.