AU · AUS
Australia Tax File Number format
Official and reviewed ID format references, with permanently masked examples for copy and QA. This site does not validate identity IDs.
Official public format
Tax File Number
TFN
Regex
^\d{9}$7083729*8
Regex and masked examples are reference only. This page does not validate identity IDs.
Data provenance
Sources
Data snapshot: 2026-09-21