Calculate GST inclusive, GST exclusive, and GST amounts using New Zealand's 15% GST rate.
Tip: Use "Add GST" when your price is GST exclusive. Use "Extract GST" when your amount already includes GST.
Enter an amount to calculate GST.
$100.00 excl. GST becomes $115.00 incl. GST.
$115.00 incl. GST contains $15.00 GST and $100.00 excl. GST.
To extract GST from a GST-inclusive amount, divide by 23.
Oliver Accounting does not provide tax advice or prepare income tax returns. This calculator is for estimate purposes only. You should consult a qualified tax professional or Chartered Accountant before making tax, filing, or financial decisions.