Ontario Launches New Ultra-Low Overnight Electricity Price Plan

Province’s third electricity price plan will offer a new option to reduce energy costs

April 11, 2023


Table of Contents

  1. Content
  2. Quick Facts
  4. Additional Resources
  5. Related Topics

TORONTO – The Ontario government is launching a new Ultra-Low Overnight price plan as part of its plan to provide consumers with more ways to keep costs down, save money and take control of their energy bills. Starting May 1, 2023, customers of Toronto Hydro, London Hydro, Centre Wellington Hydro, Hearst Power, Renfrew Hydro, Wasaga Distribution, and Sioux Lookout Hydro can opt-in to this new optional electricity price plan, with all utilities required to offer it to customers within six months.

“Our government has put families back in control of their energy bills, and the new Ultra-Low Overnight price plan will give families and small businesses who use more electricity overnight more ways to save” said Todd Smith, Minister of Energy. “Starting May 1 customers can opt-in to the new ultra-low electricity price plan which could save them up to $90 per year, while at the same time making our grid more efficient, helping to reduce costs for all ratepayers.”

The new electricity pricing structure is a third option for electricity customers, in addition to the existing Time-of-Use (TOU) and Tiered plans. Customers that use more electricity at night, including shift workers and those that electrically heat their home or charge their electric vehicle, could save up to $90 per year by shifting demand to the ultra-low overnight rate period when province-wide electricity demand is lower.

The new ultra-low overnight rate, set by the Ontario Energy Board, will be 2.4 cents per kilowatt-hour (kWh), which is 67 per cent lower than the current off-peak rate, in exchange for a higher on-peak rate.

Delivery of this new ultra-low overnight rate is possible as Ontario continues to have excess clean electricity during overnight hours. Shifting electricity use to these hours will allow the province to better leverage Ontario’s clean electricity grid, increasing grid efficiency, resulting in potential capacity cost savings for the electricity system of up to $5.7 million per year, helping to reduce costs for all Ontario ratepayers.

“By making better use of the province’s clean grid, our government is taking further action to keep electricity affordable in Ontario,” said David Piccini, Minister of the Environment, Conservation and Parks. “Offering more options for smart electricity use is good news for Ontarians and the environment.”

As Ontario’s electricity demand continues to grow, the government will continue to provide electricity relief for both people and businesses while investing in a clean and reliable energy system across the province.

“As more and more people across the province begin to use EVs, the Ultra-Low Overnight price plan will make it easier and less expensive to charge their vehicles in the evening,” said Vic Fedeli, Minister of Economic Development, Job Creation and Trade. “Ontario continues to strengthen our province’s end-to-end EV supply chain, ensuring that the cars of the future are build right in Ontario by Ontario workers.”

Quick Facts

  • The new optional Ultra-Low Overnight price plan provides:
    • Ultra-low overnight rate of 2.4 cents per kWh: everyday 11 p.m.-7 a.m.
    • Mid-peak rates of 10.2 cents per kWh: weekdays 7 a.m.-4 p.m. and 9 p.m.-11 p.m.
    • On-peak rates of 24.0 cents per kWh: weekdays 4 p.m.-9 p.m.
    • Weekend off-peak rates of 7.4 cents per kWh: weekends and statutory holidays 7 a.m.-11 p.m.
  • The new optional third price plan is available to all eligible Regulated Price Plan (RPP) TOU and Tiered consumers.
  • Families and small businesses can use the Ontario Energy Board’s Bill Calculator to determine what electricity rate plan, Tiered, Time-of-Use or Ultra-Low Overnight, best suits their lifestyle and will help them save money on their energy bills.
  • An ultra-low overnight rate will help reduce emissions by encouraging the use of more nighttime electricity, which is typically generated from clean, zero-emissions resources like nuclear, hydro and wind power.


“Toronto Hydro is pleased to be one of the first utilities to offer the Ultra-Low Overnight price plan to its customers. This new pricing option offers customers more flexibility to help manage electricity costs by shifting high electricity-usage activities, like electric vehicle charging, away from peak times. This is one of the many steps we’re taking to prepare our grid for the electrification of major economic sectors like transportation to help Toronto reach net-zero.”

– Anthony Haines
President and CEO, Toronto Hydro

“London Hydro is excited to roll out the ULO rate and help local customers lower the cost of charging electric vehicles at home. The province’s initiative will help make the grid more efficient while boosting customer choice for low-rate plans and EV adoption across Ontario.”

– Vinay Sharma
CEO, London Hydro

“The introduction of Ontario’s new Ultra-Low Overnight Electricity Pricing Plan provides customers another pricing option to fit their business and lifestyle needs. Customers now have additional choice and flexibility to manage their energy costs and consumption. We welcome this initiative as a positive step towards supporting electrification and a sustainable energy future in Ontario.”

– Teresa Sarkesian
President and CEO, Electricity Distributors Association

Additional Resources

Electricity Price Plans

Learn about the different types of electricity price plans you can choose from.

Manage energy costs for your home

Learn about programs and credits to reduce your energy bills.

Made-In-Ontario Environment Plan

Learn about Ontario’s plan to address climate change and protect our air, land and water.

Related Topics

Environment and Energy

Learn more about how Ontario protects and restores wildlife and the environment. Includes information on conservation and the electricity system. Learn more