How do I apply for a tax file number in Australia?

Answer

To apply for a Tax File Number (TFN) in Australia, you can generally apply online if you are an Australian resident. Other application methods exist for non-residents and specific circumstances, usually requiring identity verification and submission of documents to the Australian Taxation Office (ATO).

Australian Taxation Office (ATO)
Last Updated:May 5, 2026

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How it works in practice

What is a Tax File Number (TFN)?

A Tax File Number (TFN) is a unique nine-digit number issued by the Australian Taxation Office (ATO) to individuals and organisations. It's a key identifier for tax and superannuation purposes. While it's not compulsory to have a TFN, obtaining one is crucial as it helps the ATO administer the Australian tax system, and without it, you'll pay more tax on your income, and may face issues with government benefits or superannuation.

General Application Process

The application process varies slightly depending on your residency status. Australian residents, for instance, can often apply online and verify their identity at an Australia Post office. For non-residents, the application usually involves completing a form and mailing certified copies of identity documents to the ATO. It's important to provide accurate information and valid identification to ensure your application is processed smoothly.

Important exceptions

The application process differs significantly for various groups. Foreign passport holders and permanent migrants often apply online and verify identity at Australia Post. People living outside Australia, however, must download and complete a paper form, then mail it with certified copies of their identification. Companies and other organisations have a distinct application process that typically involves an Australian Business Number (ABN) application first. Children usually have their TFN applied for by a parent or guardian.

What you should do now

  1. Determine your eligibility and the correct application method (e.g., Australian resident, foreign passport holder, living overseas, or applying for a business).

  2. Gather your identity documents. Ensure they are current and valid, as you will need to provide proof of identity.

  3. Complete the appropriate application form. For Australian residents, this is often done online via the ATO website or through an interview at Australia Post.

  4. Submit your application and identity documents. Follow the specific instructions for your chosen method, which may include verifying your identity in person or mailing certified copies.

  5. Await your TFN. The ATO will mail your TFN to you, typically within 28 days of receiving a complete application.

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