Income tax Dates
Before you start
You’ll need:
- an owner or admin level myIR login
- the IRD number to be registered
- your contact details
- your BIC (business industry classification) code
- the date you'll start paying interest.
If you pay more than $5,000 a year in interest as part of your taxable activity, select ‘Register for Resident withholding tax on interest (IPS)'.
If you’re deducting RWT on dividends treated as interest or Māori authority distributions, select ‘Register for Resident withholding tax (RWT)'.
In myIR, select 'I want to...'
Select 'Register for Resident withholding tax (RWT) or Register for Resident withholding tax on interest (IPS) account'
You’ll find this under ‘Registration, application and enrolment’.
Follow the prompts to complete your registration
Log in to myIR
You can either:
- complete the registration online
- download and fill in the form Resident withholding tax – interest payer registration – IR450. Post it to one of the addresses on the form. Remember to take a copy for your records.
What happens next
Submissions take up to 10 days to process.
We’ll contact you if we need more information. Your resident withholding tax account will be available in myIR after your application is processed.
Last updated:
18 Jun 2026