A Tax File Number (TFN) is your personal tax identifier in Australia. Most workers, students, and residents need one to deal with the ATO, start employment smoothly, and avoid unnecessary withholding on income and super.
Why a TFN matters
- employers usually ask for it when you start work
- it helps ensure you are taxed correctly
- you need it for many tax return and superannuation tasks
- banks and government agencies may request it in limited legitimate situations
How to apply
The application process depends on your visa status and identity documents, but the TFN itself is generally free to apply for. Most people should follow the official ATO process rather than third-party services.
When you should be cautious
Your TFN is sensitive personal information. Do not post it online, share it casually, or send it to anyone who cannot clearly explain why they need it. Scam messages often imitate government agencies or employers to collect identity data.
Common practical questions
- Do students need one? Usually yes, especially if they will work or deal with tax and super.
- Can temporary residents apply? Often yes, but the process varies by visa and identity status.
- What if you forget it? Use official ATO channels rather than guessing or sharing documents widely.
Related guides
For deadlines and residency context, see our guides to the ATO tax return deadline, tax resident vs non-resident rules, and student visa tax in Australia.