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Income tax Dates

  • MAY 7
    Provisional tax payments are due if you have a March balance date and use the standard, estimation or ratio options.
  • JUN 28
    Provisional tax payments are due if you have a March balance date and use the ratio option.
  • JUL 7
    Income tax returns are due if you do not have an extension of time.

Gather your information

You’ll need:

  • the IRD number to be registered
  • your contact details
  • your BIC (business industry classification) code
  • the date you'll start paying interest.

Register as a RWT payer in 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.

Resident withholding tax payer online registration

Resident withholding tax - interest payer registration IR450 PDF 82KB Download form