Short answer
An ETA is generally linked to your passport and may allow multiple trips, but it can end earlier if the passport stops being valid.
An ETA is generally in effect for 12 months or until the passport expires, whichever is earlier. It can allow multiple entries, with each stay usually limited to up to three months.
If your passport expires, is cancelled, or becomes invalid before travel, the ETA may no longer let you travel to Australia. An ETA cannot be transferred to a new passport, so you may need a new ETA after getting a new passport.
Last checked 14 August 2026.