Income tax Dates
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MAR 31Final date for ratio option provisional tax applications.
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APR 7End-of-year income tax and Working for Families bills are due if you have an extension of time to file your income tax return.
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MAY 7Provisional tax payments are due if you have a March balance date and use the standard, estimation or ratio options.
Gather your information
You will need your IRD number and your tax code.
Fill in the form
Download the Tax code declaration - IR330 form.
Or you can get one from your employer or Work and Income.
If you receive NZ Super, you can update your tax code through the Ministry of Social Development's website.
Hand your form in
Give the completed form to your employer if you get salary or wages.
Give the completed form to Work and Income if you get:
- a Work and Income benefit
- New Zealand Superannuation
- Veteran’s Pension or
- a student allowance.
Your responsibilities
You need to tell your employer or payer if your tax code changes.
Last updated:
20 Oct 2025