Business basics · AU
TFN (Tax File Number)
Your personal reference number in the tax system.
A Tax File Number is your personal reference number with the ATO. You give it to employers, your bank and your super fund so your income and tax are tracked correctly. It’s yours for life, stays the same across jobs, and should be kept private — it’s different from an ABN, which identifies a business.
Grounded in ATO guidance. General information, not tax advice.
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