Free GST Calculator New Zealand

Add GST, remove GST, or check if a supply is zero-rated - instantly.

No sign-up, no ads, nothing to install.

How to use

  1. Add GST - enter your ex-GST amount and get the GST component and GST-inclusive total. Use when raising tax invoices.

  2. Remove GST - enter a GST-inclusive amount to extract the GST component and net amount. Use when reconciling supplier invoices or filing your GST return with IRD.

  3. GST-Free Check - search any expense type to see whether it attracts GST or is zero-rated. Covers 35+ common NZ business expenses.

    The standard NZ GST rate is 15%, introduced in 2010 and administered by Inland Revenue (IRD). Zero-rated supplies include most food, exports, and certain financial services.


Use case examples

  • Bookkeepers & accountants - quickly extract the GST component from a supplier invoice before coding it in Xero or MYOB

  • Tradies & contractors - check whether your quote should include GST, and calculate the exact amount to add before sending

  • Small business owners - work out how much GST you owe or can claim back when preparing your quarterly BAS

  • Accounts payable teams - verify the GST component on incoming invoices matches what the supplier has charged

For reference only. Always confirm GST treatment with your accountant or IRD at ird.govt.nz.