Ontario Bill Breakdown Calculator
Enter the pieces from your real bill and instantly see how much each part contributes to your total.
Updated 2026‑04‑22
What this calculator shows
This tool helps you understand how the major components of an Ontario electricity bill add up. By entering the amounts from your real bill, you can see how much each part contributes to the total, including HST.
It is especially useful when comparing two bills or trying to understand why a bill increased even when usage stayed the same.
What each part of the bill represents
Energy
This is the cost of the electricity you used, billed under Time‑of‑Use (TOU), Tiered, or Ultra‑Low Overnight (ULO) pricing. It reflects your actual kWh consumption.
Delivery
Delivery charges pay for the infrastructure that brings electricity to your home — poles, wires, transformers, substations, and system operations. Much of this cost is fixed, which is why delivery does not fall much when usage falls.
Global Adjustment (GA)
GA covers system‑wide electricity costs such as long‑term contracts, conservation programs, and capacity payments. It does not track your personal usage directly, which is why it can rise or fall even when your usage stays the same.
HST
Ontario electricity bills include 13% HST on most charges. Rebates or credits (if applicable) appear separately on your bill.
Why this tool is helpful
Many Ontarians find their bills confusing because the total is influenced by several components that behave differently. This calculator makes it easier to see:
- which part of the bill is the largest
- whether delivery or GA is driving changes
- how much tax adds to the total
- how two bills compare when usage is similar