Tax Codes in New Zealand: A Guide for Employers and Employees
Last Updated: December 2025 Getting tax codes wrong is one of the most common payroll mistakes in New Zealand—and it’s expensive. Wrong tax codes lead to unexpected tax bills, unhappy employees, and IRD penalties. Whether you’re an employer processing payroll or an employee wondering why your pay seems short, understanding NZ tax codes is essential. […]
Staff have received a Tax Bill, why?
Why do I get a tax bill each year? The calculation of tax is not a straight forward exercise that most assume. It is based on multiple rates and multiple thresholds. Hopefully this will help to explain why some people end up with a tax bill and some with a tax refund.