Income tax Dates
-
MAR 31Final date for ratio option provisional tax applications.
-
APR 7End-of-year income tax and Working for Families bills are due if you have an extension of time to file your income tax return.
-
MAY 7Provisional tax payments are due if you have a March balance date and use the standard, estimation or ratio options.
If your group of companies wants to form an imputation group, they'll need to send us a completed Elect to form an imputation group - IR473 form.
Check your eligibility
Gather your information
For each company or consolidated group you'll need the:
- name
- IRD number
- current imputation credit account (ICA) balance.
In myIR, select 'I want to...'
Select 'Send a message'
Select 'something else'
Write your message
Tell us you want to form an imputation group, and attach your completed IR475 form.
Depending on your situation, you may also need to attach other forms.
- If there are more than 3 companies forming the group, we'll also need a completed Election to form an imputation group – IR473 form
- Australian companies must also fill out the Trans-Tasman imputation election - IR488 form.
Log in to myIR
You can also send us your form by mail to:
Inland Revenue
PO Box 39090
Wellington Mail Centre
Lower Hutt 5045
New Zealand
What happens next
We'll send you an IRD number once we've processed the application.
Last updated:
22 Oct 2025