New Zealand Self-Employed Tax Deadlines 2025/26
Never miss a Inland Revenue deadline. This page lists every important tax date for New Zealand self-employed individuals and sole traders during the 2025/26 tax year, with live countdown timers and one-click iCal export.
Filing Deadlines
- 2025-07-07 — IR3 Tax Return Due — 2024/25: Deadline to file your IR3 Individual Income Tax Return for the 2024/25 tax year (1 April 2024 – 31 March 2025) and pay any tax owed. Using a tax agent may extend this deadline.
- 2026-07-07 — IR3 Tax Return Due — 2025/26: Deadline to file your IR3 Individual Income Tax Return for the 2025/26 tax year (1 April 2025 – 31 March 2026) and pay any tax owed.
Payment Deadlines
- 2025-08-28 — 1st Provisional Tax Instalment: First instalment of provisional tax for the 2025/26 tax year. Applies if your residual income tax (RIT) from 2024/25 exceeded NZ$5,000.
- 2026-01-15 — 2nd Provisional Tax Instalment: Second instalment of provisional tax for the 2025/26 tax year.
- 2026-05-07 — 3rd Provisional Tax Instalment: Third and final instalment of provisional tax for the 2025/26 tax year.