🇳🇿 Official Inland Revenue rules, 2025/26
How much New Zealand tax are you overpaying?
Everything here is New Zealand only: your rates, your forms, your deadlines. Answer a few plain questions and see the legal savings you are missing.
Your New Zealand tools
Build my New Zealand planA few plain questions, one written savings planNew Zealand tax calculator2025/26 rates, no sign upWhat can I claimNamed Inland Revenue reliefs, forms and deadlinesDeadlines and penaltiesFiling, paying, penalties and appealsDecode my paperworkPayslips, notices and forms explainedCompanies and trustsWhat saves tax and what costs more
Income tax
Tax year 1 April 2025 to 31 March 2026 (2025/26).
- 10.5%
- up to $15,600
- 17.5%
- $15,601 to $53,500
- 30%
- $53,501 to $78,100
- 33%
- $78,101 to $180,000
- 39%
- above $180,000
- Tax free band
- None
Dates that cost money if you miss them
1 April to 31 March the following year
7 April
Terminal tax due
ird.govt.nz7 May
Third provisional tax instalment
ird.govt.nz30 June
KiwiSaver government contribution cut-off
ird.govt.nz7 July · IR3
IR3 return due
ird.govt.nz
New Zealand forms, box by box
New Zealand return wizardIR3, IR3B and IR3R with your figuresNew Zealand self-employed returnIR3B box by box for sole tradersNew Zealand deadlines and formsIR3, provisional tax, KiwiSaver cut-offNew Zealand credits and deductionsWhat Inland Revenue lets you claimCompanies, LTCs and trustsWhen a company at 28% actually saves tax
Where these figures come from
Figures as published by Inland Revenue for 2025/26. Working for Families, student loans and the exact KiwiSaver position are not modelled.