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Term Deposit Calculator NZ (After RWT)
Free NZ term deposit calculator: interest earned and resident withholding tax (10.5%, 17.5%, 30%, 33% or 39%) to see what you actually receive.
Your deposit
Interest after tax
$588.00
| Interest before tax | $840.00 |
| RWT at 30.0% | − $252.00 |
| You receive at maturity | $20,588.00 |
Which RWT rate?
| Up to $15,600 | 10.5% |
| Up to $53,500 | 17.5% |
| Up to $78,100 | 30.0% |
| Up to $180,000 | 33.0% |
| Over $180,000 | 39.0% |
Choose the rate that matches your total income including the interest. Too low a rate means you pay the difference at the end of the year; too high and you can get it back. Without an IRD number the bank deducts 45%.
Simple interest paid at maturity; banks paying monthly or compounding will differ slightly. Rules last checked October 2026. Not legal, tax or financial advice. 🔒 Everything stays on your device.
✅ Rules last checked:
📚 Official sources: Inland Revenue: RWT rates
We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.
🛠️ Spotted a mistake or an out-of-date rule? Tell us
Questions people ask
What is RWT?+
Resident withholding tax: the tax your bank takes off interest before paying it to you.
Which RWT rate should I choose?+
The rate for your total income including interest: 10.5% up to $15,600, 17.5% to $53,500, 30% to $78,100, 33% to $180,000 and 39% above.
What if the bank doesn't have my IRD number?+
It must deduct 45%, so give your IRD number to your bank.