Canonical Definition
Billing determinants are the measured or derived quantities to which rates are applied to calculate a utility bill, such as kWh consumed (total or by time period), billing demand in kW or kVA, number of service days, and customer count. Each charge on a rate schedule is defined as a price applied to a specific determinant. Utilities and regulators also use aggregated billing determinants in rate cases to forecast revenue under proposed rates.
Explanations
Billing determinants are the measured amounts your utility plugs into its price formulas. They are used to work out your bill. Common ones include kilowatt-hours used, peak demand in kilowatts, and the number of days in the period. Each line on your bill is usually a price times one of these amounts. Regulators also use these numbers when reviewing and setting rates.
Billing determinants are the numbers behind your bill. Things like how much power you used and for how many days. Prices get multiplied by those numbers to make your bill.
Analogy Bank
Billing determinants are like the measured ingredients in a recipe — the rate schedule is the recipe, and the determinants are the amounts that go in.
Think of them like the input lines on a tax form: each charge on the bill is a rate applied to one of these measured numbers.
For a business, they're like the metered units on a cloud-computing invoice — usage, peak capacity, and service days each priced separately.
Do Not Say
- ✕Do not recite a specific customer's billing determinants; they appear on the bill and vary by rate schedule.
- ✕Do not imply all charges scale with usage; some determinants, like customer charges, are fixed.