Not tax advice. Computation tools only. Have a professional review before filing.
openaccountants
tax-calendar/nz/nz-ir3-july-7
NZAll residentsSelf-employed

Individual Tax Return (IR3)

NZ individual income tax return for the 2025/26 tax year (April 1, 2025 – March 31, 2026). Provisional taxpayers have additional mid-year instalment deadlines.

Filing deadline

July 7, 2026

Country
New Zealand
Tax year
2025
Official
Tax authority

What is this deadline?

New Zealand's tax year runs April 1 – March 31. IR3 is the standard individual return. Those with a registered tax agent get an extended deadline through March 31, 2027.

How to file

  • myIR
  • Through a tax agent

What people miss

  • Provisional tax — instalments during the year for taxpayers with residual income tax > NZ$5,000
  • GST is separate from income tax — different filing frequency
  • ACC levies — separate from tax, calculated on business earnings

Prepare this return with open-source skills

These skills are in the OpenAccountants repo. Clone them into Claude, Cursor, or any AI agent and they handle the computation.

new-zealand-gst.mdNZ

Use this skill whenever asked to prepare, review, or classify transactions for a New Zealand GST return (GST101A form) for a self-employed individual or small business in New Zealand. Trigger on phrases like "prepare GST return", "do the GST", "fill in GST101A", "create the return", "New Zealand GST", "NZ GST", or any request involving New Zealand GST filing. Also trigger when classifying transactions for GST purposes from bank statements, invoices, or other source data. This skill covers standard GST-registered persons under the invoice or payments basis. Financial services elections, GST groups, non-profit bodies, and complex change-of-use adjustments on high-value mixed-use assets are in the refusal catalogue. MUST be loaded alongside vat-workflow-base v0.1 or later (for workflow architecture). ALWAYS read this skill before touching any NZ GST work.

This page is informational only and not tax advice. Verify dates and requirements against the official tax authority before filing.

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