There are 2 basic ways of paying electricity in Aus
Peak/OffPeak and Banded
I use Banded (for many years now) coz mining 24/7 works out a better average price over the 24/7

I have price bands based on time of day.
Looking at a bill in Aug last year: the Tax inclusive price bands where:
11.99c (Hot water heater only)
13.62c (10pm to 7am)
53.35c (2pm to 8pm weekdays)
22.62c other times
Plus a 90.75c a day fee
That bill total average after taxes and discounts was 21.6c/kWhr

So after that I stopped running most of my mining equipment.
So now I only run the S5 24/7
and the S3s off during the 6 peak hours each weekday
(except I sometimes forget to turn them on at 10pm )

My last bill I can't find But I think the prices were 10% lower due to power regulation changes.

Edit: I also checked with one of my clients factory 24/7 electricity price ... it was higher than my average.