Use this New Zealand provisional tax calculator to split expected residual income tax into planned instalments for cashflow budgeting.
Splits expected residual income tax across the selected number of instalments. Used by many self-employed people, investors, and companies. Helps spread income tax through the year instead of paying one lump sum.
Use the live tool above to enter your figures, compare outcomes, and sense-check the result before you rely on it for planning. This page is built for self-employed people, investors, contractors, and companies planning provisional tax payments.
Check the official IRD guidance for the latest published rules, thresholds, timing, and definitions that apply to Provisional Tax.
This calculator provides estimates only and does not replace official IRD calculations.
It is commonly based on expected or prior residual income tax, depending on the method used.
Early estimates help spread tax cashflow through the year and reduce surprises.
Use the live tool above, enter the amounts that match your situation, and review the estimate together with the official guidance linked on this page.
No. This calculator or guide provides estimates and general information only, so you should still confirm the final position with official IRD guidance or professional advice where needed.
Use the official guidance linked on this page to check the published rules, thresholds, filing expectations, and definitions that apply to Provisional Tax.