GST Calculator NZ 2026–27
Add or remove New Zealand 15% GST and distinguish taxable, zero-rated and exempt supplies.
Source check 10 October 2026 · General information, not tax advice
Calculate your result
Tax year 2026–27 · New Zealand dollars · results update automatically
Results update automatically
GST Calculator
- Amount before GST
- $100.00
- GST
- $15.00
- Amount including GST
- $115.00
- GST rate
- 15%
- Treatment
- taxable
- The selected GST treatment is user-confirmed.
How this calculator works
Add or remove New Zealand 15% GST and distinguish taxable, zero-rated and exempt supplies.
Formula
GST-inclusive GST = gross × 3/23; GST-exclusive GST = net × 15%.
Worked example
$115 inclusive contains $15 GST and $100 before GST.
Scope and edge cases
Eligibility, tax codes, certificates, multiple income sources and annual reconciliation can change the final outcome. Missing components are disclosed instead of silently becoming zero.
Frequently asked questions
Is this gst calculator exact?
The result card says whether the calculation is exact for its supported scope, indicative, missing inputs or unsupported. It never promotes an incomplete rule set as exact.
Does Taxliva store my salary?
No account is required and the interactive calculation runs in your browser.
Which tax year is used?
It uses the New Zealand tax year from 1 April 2026 to 31 March 2027.
Official sources
- GST rate and registration — Inland Revenue
Rule review
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