In my experience, it sometimes has depended on someone in the building taking responsibility for the secretary or treasurer role, and coming up with a figure that other owners as a whole may find appropriate for the amount of expenses. that represents on a yearly basis. That is, routine expenses, plus a capital works amount. In NSW I understand there is a mandatory amount for strata buildings to have in their capital works fund for future maintenance works. You could check what happens in your state, perhaps with a simple phone call.