Add GST to a price or work GST out of a GST-included amount.
Uses the standard GST rate of 15%. Source values reviewed on 19 February 2026.
Uses the New Zealand standard GST rate of 15%.
| Item | Value |
|---|---|
| Standard GST rate | 15% |
| Add GST to a price | Price before GST x 1.15 |
| Work GST out of a GST-included price | GST-included price x 3/23 |