Electricity Tariff Comparison Calculator
Compare two electricity plans side by side using your usage, their usage rates and daily supply charges to see which is cheaper.
Your results
Calculation breakdown
- Plan cost
- Cost = usage × usage rate + (daily supply charge × 91 days)
Worked example
For 900 kWh a quarter, Plan A at 30c/kWh with a $1.05 daily charge costs about $365.55, while Plan B at 27c/kWh with a $1.25 daily charge costs about $356.75, so Plan B is cheaper.
Assumptions
- Assumes a 91-day quarter for the supply charge comparison.
- Excludes conditional discounts unless built into the entered rate.
- Does not include feed-in tariff credits.
How this calculator works
Enter your typical usage and the usage rate plus daily supply charge for two different electricity plans to compare total annual cost. This helps you see through headline discounts to the actual dollar difference for your own usage pattern.
Frequently asked questions
Should I include conditional discounts?
Only include a discount if you are confident you will meet its conditions, such as paying on time every bill.
What about feed-in tariffs?
This calculator focuses on usage and supply charges; use the Solar Feed-In Tariff calculator to compare export credits separately.
Does a lower usage rate always win?
Not always, a higher daily supply charge can outweigh a lower usage rate for low-usage households, which this calculator accounts for.
Actual prices, usage, efficiency and savings vary by provider, equipment, location and behaviour.