AUSTRALIA · ELECTRICITY CALCULATOR
Estimate an Australian electricity bill from your own kWh usage, c/kWh tariff rates and daily supply charge. The calculator supports both single-rate and time-of-use plans, with optional controlled-load usage and solar export credits.
HomeBillLab calculator
Estimate an electricity bill
Use the kWh, c/kWh rates and daily supply charge from your own electricity bill or plan. Choose a single-rate or time-of-use calculation, with optional controlled-load and solar export fields.
Optional: controlled load and solar export
Peak
Shoulder
Off-peak
Optional: controlled load and solar export
What is included in this estimate?
The calculator adds the usage charges you enter and the daily supply charge for the billing period. Optional controlled-load charges are added, while an optional solar feed-in credit is subtracted. It does not automatically add other retailer fees, late-payment charges, rebates, concessions, demand charges or block-tariff rules.
Why can the annualised figure differ from my real annual bill?
It repeats the same average daily cost across 365 days. Seasonal electricity use, changing tariffs, solar export, discounts and other bill adjustments can make your actual annual total different.
Privacy: calculations run in your browser. The numbers you enter are not submitted to HomeBillLab.
How this electricity bill calculator works
Australian electricity bills commonly separate a variable usage charge from a fixed daily supply charge. The usage charge is based on the kilowatt-hours you consume, while the supply charge applies for the billing period regardless of how much electricity you use.
(kWh used × usage rate in $/kWh) + (billing days × supply charge in $/day) + optional controlled-load charge − optional solar feed-in credit.
For a time-of-use plan, HomeBillLab calculates peak, shoulder and off-peak usage separately and then adds those usage charges together before applying the supply charge and any optional adjustments.
Where to find the numbers on your electricity bill
Total electricity usage
Look for electricity consumption in kilowatt-hours (kWh) for the billing period. A single-rate bill may show one total, while a time-of-use bill can show separate usage for peak, shoulder and off-peak periods.
Usage rate
Usage or consumption rates are normally shown in cents per kilowatt-hour (c/kWh). Copy the rate that applies to the usage you are entering rather than substituting a national average.
Daily supply charge
The fixed supply charge is commonly shown in cents per day or as a total for the billing period. It is separate from the variable usage charge.
Solar and controlled load
If your bill lists a feed-in tariff for exported solar or a separate controlled-load tariff, use the optional fields to include those items in the estimate.
Single rate or time of use?
A single-rate tariff charges the same usage rate across the relevant billing period. A time-of-use tariff applies different rates at different times, often described as peak, shoulder and off-peak. The exact periods vary by plan, retailer and network, so use the labels and rates on your own bill or plan document.
Why the estimate may not exactly match your final bill
This tool is designed to reproduce the main arithmetic of a household electricity bill from the inputs you provide, not every possible retail contract rule. Your actual bill can also contain discounts, concessions, rebates, fees, demand charges, tariff blocks, meter adjustments, estimated reads or other retailer-specific items.
The monthly and annualised figures are comparison estimates. They repeat the average daily cost from the billing period and therefore do not predict seasonal changes in heating, cooling, solar generation or future tariffs.
Related Australian energy guides
Use these guides to check assumptions, follow worked examples and compare common household scenarios.
Guide
Average Electricity Bill in Australia: State Benchmarks
Compare 2026–27 Australian electricity bill benchmarks by state and network, then estimate your own bill using your usage, tariff and supply charge.
Guide
Controlled Load Electricity Explained in Australia
Understand controlled load electricity in Australia, how it differs from time of use, how it appears on bills and how to calculate its cost.
Guide
How Much Does 1 kWh of Electricity Cost in Australia?
See current 2026–27 Australian electricity price examples, why there is no single national c/kWh rate, and how to use the rate on your own bill.
Guide
How to Read an Electricity Bill in Australia
Learn how to check electricity usage, tariffs, supply charges, meter reads, solar credits and the final amount due on an Australian bill.
Guide
Single Rate vs Time of Use Electricity in Australia
Compare flat and time-of-use electricity tariffs with two Australian load-shape scenarios using the same 20 kWh per day.
Guide
Supply Charge vs Usage Charge: What’s the Difference in Australia?
Compare the fixed daily supply charge with the variable usage charge on an Australian electricity bill and calculate how each affects your total.
Official Australian references
- Australian Energy Regulator — Understanding your energy bill
- Energy Made Easy — Electricity tariffs
- Energy Made Easy — Understanding gas and electricity charges
- energy.gov.au — Find the best energy deal
Reviewed: 21 August 2026.
Electricity bill calculator FAQs
Should I enter the daily supply charge when calculating one appliance?
No. The daily supply charge is a fixed property-level charge and is not caused by one appliance. For a single appliance, use the Appliance Running Cost Calculator. This electricity bill calculator includes the supply charge because it estimates the household bill for the billing period.
What if my plan has no shoulder rate?
Leave the shoulder usage and shoulder rate at zero. Enter only the tariff periods that appear on your plan or bill.
Does the calculator support solar?
Yes. If you know the number of kilowatt-hours exported to the grid and your feed-in tariff, enter them in the optional section. The estimated feed-in credit is subtracted from the subtotal.
Does this calculator compare electricity retailers?
No. It calculates the cost of the rates and usage you enter. For plan comparison, use the official comparison service available for your location or your relevant state or territory service.