Use this NZ RWT calculator to estimate resident withholding tax deducted from interest or dividend income at a selected withholding rate.
Multiplies gross interest or dividend income by the selected withholding rate. Often applies to bank interest and some other investment income. Choose a rate that better matches your marginal tax profile.
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 investors, savers, and taxpayers reviewing withholding on interest and dividend income.
Check the official IRD guidance for the latest published rules, thresholds, timing, and definitions that apply to RWT.
This calculator provides estimates only and does not replace official IRD calculations.
RWT is resident withholding tax deducted at source from certain types of investment income.
The chosen rate affects whether tax may still be owing or refundable later.
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 RWT.