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Income tax Dates

  • MAR 31
    Final date for ratio option provisional tax applications.
  • APR 7
    End-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 7
    Provisional tax payments are due if you have a March balance date and use the standard, estimation or ratio options.

New investment income reporting requirements will become compulsory on 1 April 2020. Until then you can opt in to the new requirements, or keep following the existing requirements.

This page describes the existing requirements.

Resident withholding tax (RWT) and non resident withholding tax (NRWT) certificate filing options

You can file your end of year RWT withholding certificate IR15 and New Zealand NRWT withholding certificate IR67 electronically, or print them off and send them to us.

The due date for RWT and NRWT certificates is 15 May.

RWT and NRWT certificate filing specification

We can only accept NRWT and RWT certificates that are formatted according to these specifications.

2019 RWT and NRWT software specifications PDF 604KB Download form 2020 RWT and NRWT software specifications PDF 581KB Download form

Log in to myIR

Check for errors

An error report is available to view any errors in your files. Errors must be corrected before validation and processing.

Validate your files

File through myIR

Do not encrypt your files.

You can also file your IR15 or IR67 by email, through the mail using CD, DVD or USB, or on paper.

Filing through email

Download this cover sheet and copy the text into the body of your email.

For email filing RWT and NRWT certificates cover sheet PDF 55KB Download form

If your files are for more than one IRD number, make sure you identify them on the cover sheet.

Zip and encrypt your files following our encryption requirements. Files that are emailed must be encrypted to a PGP level of data encryption.

Download the public key

Our public key is available from this link. Save it with the extension '.asc'

Encrypt your files

Many apps are available to encrypt your files using our public key, such as the open source Gpg4win.

Attach the file to your email and send it to us.



If our RWT on interest reconciliation statement IR15S or NRWT reconciliation statement IR67S haven't already been sent to us, you can scan and attach these to your email.

If the data fails, we will email you a request for an amended file. Once the file has been successfully uploaded, you'll get email confirmation.

Filing through the mail using CD, DVD or USB

Files can be posted to us on CD, DVD, or USB. Mail the electronic media and accompanying IR15S to:

Operations Delivery Upper Hutt
Inland Revenue
PO Box 39090
Wellington Mail Centre
Lower Hutt 5045

Paper filing

You can download the RWT withholding certificate (IR15) or NRWT withholding certificate (IR67) and send it to us.

RWT withholding certificate IR15 PDF 92KB Download form New Zealand NRWT withholding certificate IR67 PDF 137KB Download form