Medicare safety net is $2,544 of out-of-pockets, as
@Pushka noted. You need to register for it. Your current 'spend' towards it is shown on the Medicare app. There is a family safety net too.
There is also a pharmaceutical safety net, where you get reduced charges (beyond PBS) after reaching a certain amount in a calendar year - about $1650 or $280 for concession card holders. Free for concession card holders, $7.70 for others.
But the amount is at one pharmac_, not total spend. I only discovered it when my pharmac_ told me I had reached the limit a few years ago. A threshold I didn't like reaching. I enquired yesterday and still some way to go, this year
Once you or your family spend a certain amount on PBS medicine you’ll reach the PBS Safety Net threshold.
www.servicesaustralia.gov.au