The most expensive periods for electricity usage in Ontario are about to change as the province transitions from winter to summer time-of-use rate schedules. These adjustments impact when electricity costs are highest and lowest throughout the day, making it important for households to plan usage accordingly.Starting May 1, the time-of-use pricing system will officially move to the summer rate structure. Along with this shift, updated electricity prices will also come into effect, although the exact rates have not yet been announced.
Time-of-Use Period Update (Nov 1, 2025 – Oct 31, 2026)
The time-of-use electricity pricing schedule applies across a full-year cycle, covering the period from November 1, 2025, to October 31, 2026. These pricing periods determine how much consumers pay depending on the time of day electricity is used.
Ontario Electricity Rates Overview
Electricity pricing in Ontario is regulated and set by the Ontario Energy Board (OEB). The OEB reviews and updates rates periodically to reflect changes in energy supply, demand, and overall market conditions.
Estimated Time-of-Use Schedule Comparison
| Season | Off-Peak Hours | Mid-Peak Hours | On-Peak Hours |
|---|---|---|---|
| Winter (Nov 1 – Apr 30) | 7 PM – 7 AM | 11 AM – 5 PM | 7 AM – 11 AM, 5 PM – 7 PM |
| Summer (May 1 – Oct 31) | 7 PM – 7 AM | 7 AM – 11 AM, 5 PM – 7 PM | 11 AM – 5 PM |
What This Means for Consumers
With the shift to summer pricing, the most expensive electricity hours will move to midday when demand is typically higher due to cooling needs. Consumers can manage their electricity bills more effectively by shifting usage to off-peak hours whenever possible.
