Clearer numbers for everyday decisions.

Free Tax Calculator NZ is an independent website for exploring New Zealand employment pay and everyday money calculations. Its purpose is to make the assumptions behind an estimate visible, so you can compare scenarios and understand why the result changes.

What the tools do

The salary tools use a 2026/27 annual model for regular main-job employment. Other calculators answer specific questions about GST, savings, borrowing, distance-based road charges or selected import taxes. Each tool states its limits. A mortgage repayment illustration, for example, is not a lending decision; an employee ACC calculation is not a self-employed invoice estimate.

Where the numbers come from

The methodology page links to the official rules used. Worked examples show the inputs so a reader can reproduce them. Automated checks cover tax-band boundaries, the ACC ceiling, selected deductions and the arithmetic used by the tools. These checks are software verification, not professional certification.

How the content is prepared

AI-assisted drafting and software development were used to create this website. The site does not claim that a named accountant or financial adviser has independently approved every page. Explanations are published under the website name; official sources and the scope of the model are identified so readers can check them. Read the editorial and corrections policy.

Your information

You can use every calculator without an account. Optional accounts store calculations you explicitly save. Shared links can contain the entered amounts, so review a link before passing it on. The privacy page explains account data, browser storage and contact messages.

Contact and corrections

Use the contact form to report a problem or ask about the website. Include the tool and a non-sensitive example. We cannot access your Inland Revenue records and do not need your IRD number, password or bank details.

Email: [email protected]