Australia Tax ID Numbers

Tax File Number (TFN)

For Individuals, Example: 320928344

The Australian Tax File Number (TFN) is an 8 (older numbers) or 9-digit number with the last digit being a check digit. It is issued by the Australian Taxation Office (ATO) to taxpaying individuals and organisations. A business has both a TFN and an Australian Business Number (ABN).

Business Number (ABN)

For Entities, VAT, Example: 92873837267

The Australian Business Number (ABN) is 11 digits, where the last two digits are check digits. It is an identifier issued to entities registered in the Australian Business Register (ABR).

Format Guide: N = Number; A = Letter; X = Number or Letter
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