Key point
A TFN is a sensitive lifetime identifier. Apply through the official ATO service and store it securely.
Apply after arrival
Eligible foreign passport holders normally apply online after entering Australia and while holding a valid visa with work rights.
Use it safely
Give your TFN only to organisations that are legally entitled to request it. Do not place it in ordinary chat or email messages.
Before you apply
Check that your information covers the correct Australian income year. Keep source documents and do not enter TFNs, passport numbers or bank credentials in ordinary messages.
This guide provides general information only. Tax outcomes depend on individual circumstances and current law. Check official ATO guidance or obtain personal assistance before lodging.