Google sheets functions for calculating NZ income tax paid by individuals on salary/wages etc. Years ending 2025 (FY25) and 2026 (FY26) are supported. It has been tested against the IRD calculator for salaries of $50k and $200k.
How to use:
- From your Google Sheet click
Extensions-> Apps Scripts
(https://developers.google.com/apps-script/guides/sheets/functions)