Resident Withholding Tax Calculator

Resident Withholding Tax (RWT) is tax deducted at source from interest and dividend income paid to New Zealand tax residents. When a bank pays you interest, it deducts RWT before crediting your account and pays it directly to Inland Revenue on your behalf. Similarly, companies deduct RWT from dividends paid to shareholders. The purpose of RWT is to ensure tax on passive income is collected progressively throughout the year, rather than as a lump sum at year-end. RWT is not a final tax — it is credited against your total income tax liability when you file your tax return (or when IRD auto-calculates your assessment). The payer (bank, company, or other entity paying interest or dividends) is responsible for deducting the correct amount and remitting it to IRD. You must provide your IRD number to the payer to avoid RWT being deducted at the default rate. Source: IRD — RWT (ird.govt.nz/income-tax/withholding-taxes/rwt).

Your RWT rate should match your personal income tax rate, ensuring the right amount of tax is withheld from your interest and dividend income. The available RWT rates for interest income are: 10.5% (for individuals earning under $14,000), 17.5% ($14,001-$48,000), 28% ($48,001-$70,000), 30% (for companies and trustees), 33% ($70,001-$180,000), and 39% (over $180,000). If you do not notify your bank or payer of your chosen rate, the default rate of 33% applies — which may result in over-withheld tax that you can claim back at year-end. For dividends, the standard RWT rate is 33% for resident individuals, though imputation credits attached to the dividend can reduce or eliminate the RWT liability. It is important to review your RWT rate when your income changes significantly, to avoid large over- or under-withholdings. Source: IRD — RWT Rates (ird.govt.nz/income-tax/withholding-taxes/rwt).

For most salary and wage earners who only have interest income alongside their employment income, you generally do not need to file a tax return if RWT has been correctly deducted. Inland Revenue automatically calculates an income tax assessment after 31 March each year using information from banks, employers, and other payers. If the RWT deducted matches your correct tax rate, your tax position may be square and no further action is needed. However, you should file a return (or respond to the auto-assessment) if you have additional income not subject to withholding, if you have deductible expenses, or if you believe your RWT rate was incorrect. Self-employed individuals, rental property owners, and those with overseas income must still file returns regardless of RWT deducted. Dividend recipients with imputation credits attached may also benefit from filing to claim those credits. Source: IRD — Individual Income Tax Returns (ird.govt.nz/income-tax).

RWT (Resident Withholding Tax) and NRWT (Non-Resident Withholding Tax) are both taxes withheld at source, but they apply to different groups of people. RWT applies to New Zealand tax residents — people who live in New Zealand or who have a sufficient connection to New Zealand for tax purposes. NRWT applies to non-residents: people or entities that are not tax residents of New Zealand but who receive interest or dividends from NZ sources. The standard NRWT rate on interest is 15%, though this can be reduced under a double tax agreement (DTA) between New Zealand and the recipient's country of residence. The NRWT rate on dividends is also 15% (or less under a DTA), but supplementary dividends and imputation credits can offset this. Unlike RWT, NRWT is generally a final tax for non-residents — they do not file NZ income tax returns for this income. Source: IRD — NRWT (ird.govt.nz/income-tax/withholding-taxes/nrwt).