I found this guide:-
How are strata fees calculated?
As a guide, expect to pay between 0.3 per cent to 1.2 per cent of a property’s value in strata fees. Those with more amenities will be in the upper end of this range.
Always do your homework on strata fees by looking at what is being charged by comparable buildings. Low levies can correlate with poor maintenance. This can not only be expensive to fix but can impact the long-term value of your property.
[ https://www.ljhooker.com.au/blog/ultimate-guide-strata-fees ]