Different names, similar role
A UK standing charge, Australian daily supply charge and North American customer or service charge can all represent a cost that applies even at zero kWh. The exact meaning is determined by the tariff, so use the local document instead of assuming the labels are interchangeable.
Put both plans on the same period
Convert a daily fixed charge by multiplying it by the exact billing days. Convert a monthly charge only when the tariff defines the month in the way you are comparing. Then add energy charges for the same kWh and time split.
- Daily fixed amount × billing days
- Monthly fixed amount for matching months
- Energy charge using identical kWh assumptions
Why low-usage homes notice it
A fixed amount is spread over fewer kWh in a low-use home, which makes its all-in effective rate look high. That does not mean the appliance energy rate itself is high; it means the fixed part is a larger share of the bill.
What not to promise
An appliance efficiency change reduces variable electricity use. It normally cannot remove a connection charge by itself. Show fixed charges beside the saving so the visitor understands what is and is not expected to move.
Worked example: daily charge
Inputs
- 0.60 daily supply charge
- 30 billing days
- 400 kWh at 0.25/kWh
Working
- Fixed charge = 0.60 × 30 = 18.00
- Energy charge = 400 × 0.25 = 100.00
- Comparison total = 118.00 before other bill lines
Sources for this guide
Energy price cap unit rates and standing charges
Ofgem
Current regulator rates and regional standing-charge context.
Open official resourceFind the best energy deal
Australian Government
Explains bill comparison and the role of supply and usage charges.
Open official resourceElectricity prices and rates explained
U.S. Energy Information Administration
Explains why an average price statistic is not necessarily the rate applied to the next kWh.
Open official resourceYour power bill
Electricity Authority
Consumer guide to New Zealand bill components.
Open official resource