Free Reverse GST Calculator for New Zealanders
Given a GST-inclusive total, the reverse GST formula is: GST = total × 3 / 23, and the net (excl GST) is total × 20 / 23. Try it with any amount.
GST-inclusive amount
$1,150
$
15%
%
GST extracted
$150.00
from a $1,150 GST-inclusive total
Reversing 15% GST from $1,150: GST = total × 3/23.
Total (incl GST)$1,150.00
GST amount$150.00
Net (excl GST)$1,000.00
About our Reverse GST Calculator
Disclaimer: This calculator is for information only and does not constitute financial advice. Real-world figures may differ due to fees, rounding, rate changes, and policy specifics. Always confirm figures with the relevant provider before signing anything.