NZ tax calculators
Five free calculators for the 2026 NZ income year. Rates verified against IRD and ACC on 2026-06-06.
NZ income tax calculator
Work out your annual take-home pay under the post-31-July-2024 brackets, including ACC 1.67%, student loan and KiwiSaver. Source: IRD tax-rates page.
Open calculator →NZ PAYE calculator
Per-payday take-home: weekly, fortnightly or monthly. Covers primary tax codes (M, M SL, ME, ME SL) and secondary codes (S, SH, ST, SB, S SL).
Open calculator →GST calculator
Add 15% GST to a price, remove GST from a GST-inclusive amount, or calculate the GST component alone.
Open calculator →Student loan repayment calculator
12% on every dollar above the $24,128 threshold for the 2026 income year. Annual, monthly and weekly breakdown.
Open calculator →UOMI calculator (use-of-money interest)
Estimate IRD interest on an overdue tax balance. User-entered rate since UOMI is reset by Order in Council; link to current rate.
Open calculator → Estimate only. All calculators show indicative figures based on published IRD / ACC rates. They do not handle secondary tax-code combinations, lump sums, redundancy, schedular payments, ESCT on KiwiSaver, Working for Families, or non-resident situations. For a binding figure, talk to a Chartered Accountant — submit a quote at /quote/ and Lynch & Associates will reply within one business day.