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Register for a Tax File Number TFN

tax file number

A Tax File Number (TFN) is a unique number issued by the Tax Office to individuals and organisations. Partnerships, companies and trusts need their own Tax File Number (TFN). A Tax File Number (TFN) can be obtained at the same time as an ABN, using the same application form. Sole traders use their individual TFN in dealings with the Tax Office. Some of the main reasons for having a Tax File Number TFN are:

  • to quote to employers (this applies to individuals only)
  • to quote to investment bodies responsible for paying interest, dividends and unit trust distributions to quote to government bodies, for example the Tax Office, when applying for an Australian Business Number (ABN) or lodging income tax returns.

If you are a partnership, trust or company, you can apply for a TFN at the same time as your ABN, on the Australian Business Register website. If you are an individual, visit the Tax file number application or enquiry for an individual page.


Read more about Tax File Number essentials for individuals on the Tax Office website. Contact the Tax Office on 13 28 66.