NZ Tax Tools

Corrections

How to report an error, and what happens after you do.

Sites that publish numbers get some of them wrong. What matters is what happens next. If a figure here disagrees with Inland Revenue, ACC, Work and Income, or the legislation itself, we want to know.

Reporting an error

Email [email protected]. A report is worth sending even if you only have some of the following, but these four things make it actionable:

  • The page address (the full URL), plus the tax year selected if the page has a year selector.
  • The inputs you used — the amounts you entered, the tax code, and any options you chose.
  • The result the page gave you.
  • What you expected instead, and why — ideally the IRD page or IR-number guide, the ACC levy schedule, the Work and Income rate table, or the section of the Income Tax Act 2007 that says otherwise.

You do not need to be certain, and you do not need to be an accountant. “This looks wrong to me and here is the ird.govt.nz page I was reading” is a good report.

What happens next

  1. We reproduce it. Your inputs are run through the live page to confirm the output. If we cannot reproduce it, we tell you rather than leave you waiting.
  2. We verify against the official source. The disputed rule is re-read at Inland Revenue, ACC, Work and Income, or the legislation itself — never settled by checking how another calculator behaves. This step decides the outcome.
  3. We fix it, with a test. Where the value is one a test can pin, a confirmed error becomes an automated test asserting the correct answer, then the fix that makes it pass, so the same defect cannot come back unnoticed.
  4. We look for the same error elsewhere. A wrong figure is rarely in one place — the same number tends to also sit in an article, a glossary entry, a reference table, or a related calculator.
  5. We publish and reply. The correction goes live and you are told what we found, including when the original figure turned out to be right.

What we commit to

  • Material corrections are noted on the page rather than made silently. Where a published figure was wrong in a way that could have changed a reader's decision, the page says it was corrected. Typos, wording, and layout are fixed without a note.
  • Verified errors are corrected promptly. Where a fix will take longer, the affected result carries a warning in the meantime rather than continuing to show a number we know to be wrong.
  • Substantive pages show when they were last reviewed, and that date comes from the page's own revision history rather than being typed by hand.
  • Reports are answered — including the ones that turn out to be mistaken, which usually mean a page explained an assumption badly and is itself worth fixing.

What this page is not

This is a policy about the accuracy of published calculations and guidance. It is not a channel for advice about your own tax position: a report that a calculator disagrees with your accountant is welcome and will be checked, but the reply will be about the calculator, not about your return. NZ Tax Tools is not a registered tax agent or a chartered accountant, cannot be linked to your myIR account or act for you with Inland Revenue, and does not give personal tax advice — see our Disclaimer.

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