About Capital Gains Tax NZ
A free tool for one question: will I pay tax when I sell? Built and run by Crucible, an independent New Zealand company.
How the numbers are checked
Every rule comes from Inland Revenue: the bright-line guides IR1229 (March 2026) and IR1227, the question we’ve been asked QB 25/08, and IRD’s pages on tax rates, shares and cryptoassets. The income tax brackets come from the same tested engine as Tax Calculator NZ.
Every case from IRD’s worked examples runs on each build and must pass, or the site is not published. The results are listed on our Methodology and tests page.
Independent and neutral
We are not affiliated with any political party. The election page describes each party’s position from its own material and news reports, lists parties alphabetically, and marks every proposal as not law.
Who runs it
Capital Gains Tax NZ is a product of Crucible, the company behind Calculate.co.nz, New Zealand’s largest free calculator and financial literacy site. For wider money questions, try Calculate.co.nz.
This site is not affiliated with Inland Revenue. It is a guide, not tax advice: for anything that affects your tax position, check with IRD or a tax adviser.
Rules in use
- 2-year test for sale agreements from 1 July 2024
- Older 2, 5 and 10-year periods
- Main home: more than 50% of land and time
- Income tax rates 2024/25 to 2026/27
Rules checked 10 November 2026.