More about PIR (Prescribed Investor Rate)

The Westpac KiwiSaver Scheme is a Portfolio Investment Entity (PIE) for tax purposes. This means that:

  • we'll calculate the amount of taxable income (or loss) as well as any tax credits or other amounts attributable to you from the Westpac KiwiSaver Scheme; and
  • we'll pay tax on the taxable income attributed to you at your notified PIR.

You'll need to provide both your IRD number and your PIR, otherwise the highest PIR will apply.

Your PIR will be one of:


If you're a New Zealand tax resident and in either one of the last two income years:

  • Your taxable income (excluding income from PIEs) was $14,000 or less; and
  • Your total income (including PIE income after subtracting PIE losses) was $48,000 or less.


If you're a New Zealand tax resident and you don't qualify for the 10.5% rate but in either of the last two income years:

  • Your taxable income (excluding income from PIEs) was $48,000 or less; and
  • Your total income (including PIE income after subtracting PIE losses) was $70,000 or less.


If you don't meet the requirements for the 10.5% or 17.5% rates (or you fail to notify a PIR or your IRD number), or you're not a New Zealand tax resident.


Income years generally run from 1 April in any year to 31 March the following year.

Non-New Zealand income counts when calculating your PIR

When you work out your PIR, you must include non-New Zealand sourced income in calculating your taxable income for any particular income year – even if you weren't a tax resident in New Zealand when that income was earned. This is especially important for new residents to consider. In some cases, new residents can elect out of this treatment. Simply visit Inland Revenue's website to find out more.

It's important to let us know your correct IRD number and PIR

It's very important to let us know your IRD number and correct PIR. If your notified PIR is too low, you may need to pay any tax shortfall (plus any interest and penalties) and file a tax return. From 1 April 2020, Inland Revenue will assess your PIR based on the information they have on your income. If they think your PIR is incorrect, they will provide us with an updated PIR and we must update it for you. However, you can subsequently advise us of a new PIR if you think Inland Revenue has given us an incorrect PIR.

From the 2021 tax year end onwards, Inland Revenue will automatically assess your PIE tax liability if your PIR has been incorrect at any time during the tax year. If your PIR was too high, you may receive a refund for overpaid PIE tax from Inland Revenue. However, if your PIR was too low, you will be required to pay any PIE tax shortfall using the correct PIR to Inland Revenue.

If you invested prior to 1 April 2018 and don't provide your IRD number and PIR, then all taxable income attributed to you will be taxed at 28%. Finally, it is important to let us know if your PIR changes to ensure you're not under or over taxed.

It's easy to update your PIR in Westpac One®  online banking

You can update your PIR through Westpac One online banking at any time. If we don't already have your IRD number, you'll also need to know this. To update your PIR, just login to Westpac One and follow these steps:

  1. Select Profile
  2. Select Tax Details
  3. Answer the tax residency questions
  4. Enter your IRD Number
  5. Select your Withholding Tax Rate
  6. Select your PIR
  7. Hit Save

 PIR screenshot

Other ways you can update your PIR include:

The information in this webpage is intended for general tax information purposes only, it does not constitute tax advice, and should not be relied upon for tax purposes. The information is based on legislation current as at April 2020. Taxation legislation, its interpretation and the rates and bases of taxation may change. You should seek professional advice on the tax implications of investments based on your particular circumstances. Westpac accepts no responsibility for tax consequences of investments to you or any third parties. Further information on PIRs and on tax can be found on the Inland Revenue's website