TOU vs Tiered Savings Calculator | Ontario Electricity Explained

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TOU vs Tiered Savings Calculator (Ontario)

Updated 2026-02-12

New: Want to include Ultra‑Low Overnight (ULO) too? Try the 3‑way calculator here: TOU vs Tiered vs ULO Savings Calculator.

This tool helps you compare Time‑of‑Use (TOU) vs Tiered pricing using your estimated monthly usage and a simple usage split across on‑peak, mid‑peak, and off‑peak hours. It’s designed to show how plan choice and behavior can change costs.

Your usage

Monthly kWh used

TOU usage split (percent)

If your split doesn’t add to 100, the calculator will normalize it. On‑peak % Mid‑peak % Off‑peak %

Rates (enter your assumptions)

TOU on‑peak rate ($/kWh) TOU mid‑peak rate ($/kWh) TOU off‑peak rate ($/kWh)

Tiered pricing

Tier 1 limit (kWh/month) Tier 1 rate ($/kWh) Tier 2 rate ($/kWh)

Other bill components (estimates)

Delivery charges ($) Global Adjustment ($)

How to use this tool

If you know your monthly kWh from your bill, enter it.
Estimate your TOU split. A household that runs laundry/dishwasher overnight often has a higher off‑peak percentage.
Enter the rates/thresholds you want to test (these change over time).
Adjust delivery/GA to match your typical bill and compare results.