But an increasing number aren't seeing quarterly bills at all as months slip by without a bill arriving.
When one finally does turn up it's massive and the power companies demand immediate payment.
Customers are getting slugged with a kings ransom because of the mistakes of power companies.
Merrilyn Davidson claims she waited an entire year for a bill from TruEnergy then was slapped with a $1500 demand.
“They just expected us to pay as normal there was just the normal due by date with in a few week’s time," Merrilyn said.
"There was no method of a payment plan or anything to make it easier."More stories from Today Tonight
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This is typical of the complaints that have turned into a roar across the country.
This year to June almost 2300 Victorians called the ombudsman about late bill problems, that's almost the same number for the entire previous financial year.
In New South Wales complaints about high bills or disputed amounts has jumped by 23 per cent.
And in Queensland, there was a 15 per cent increase in billing complaints up to 3106.
Essential services commission CEO David Heeps says companies can't force you to pay straight away if it's their fault.
“If you haven't been billed for six months, then you should be given time payments over the next six months to make up that back log," David said.
If you get a bill that's for more than nine months of power usage, don't pay the lot. Under the law the most your provider can back bill is for nine months - after that they could be up for some of the costs.
True Energy told Today Tonight billing delays can be caused by a variety of reasons including technical issues and they work with their customers to arrange longer payment periods.