Not tax or financial advice. For information only. Check ird.govt.nz and acc.co.nz, or ask a qualified tax agent. Last checked 17 October 2026.

Tax calendar and provisional estimator

For a sole trader with a 31 March balance date. Standard-option instalments, GST, the IR3, terminal tax and a rough ACC levy. Estimate only.

Last checked 17 October 2026. Read the written calendar.

Estimate only, not tax advice. Not tax or financial advice. Figures are calculated in this browser. They are not saved and not sent.

Stays in this browser. No account, no cookies, no saved figures.

Residual income tax, last year (NZD)

Whole dollars are enough. Leave blank to list dates without amounts.

Residual income tax, two years ago (NZD)

Needed only if last year's return was filed after 28 August and on or before 15 January.

When last year's IR3 was filed

GST filing

Assumes a 31 March balance date. Six-monthly provisional dates are marked Uncertain.

Tax agent with an extension of time

Provisional tax already paid (NZD)

Applied to the earliest instalment first. Leave blank for zero.

ACC levy sketch

Estimated liable income (NZD)

Hours

Full-time income under $50,501 uses the CoverPlus minimum. Part-time does not.

Your Work levy rate per $100

From your Classification Unit. This site does not store CU rates. Example shape: 0.50. A rate above 20 is rejected.

Is that Work levy rate GST-exclusive or GST-inclusive?

The made-up example uses residual income tax of $12,000 from the provisional tax guide, and 2-monthly GST. The Work levy box stays empty so a Classification Unit rate is not invented.