Ontario’s latest electricity rates offer electric vehicle owners an opportunity to charge for remarkably little overnight, but there is a catch that could make some household electricity bills substantially more expensive.
Effective November 1, 2026, the Ontario Energy Board has set electricity prices as low as 3.7 cents per kilowatt-hour under its optional Ultra-Low Overnight (ULO) plan. However, the same plan charges 37.7 cents during weekday peak hours, creating a price difference of more than tenfold.
For Ontario households, particularly those with electric vehicles, the changes make charging schedules more important than ever. Understanding when electricity is cheapest, how peak rates affect everyday activities, and whether switching plans makes financial sense could mean the difference between meaningful savings and an unexpectedly high monthly bill.
The Overnight Bargain Is Not Automatic
Ontario’s 3.7-cent rate is attached to the Ultra-Low Overnight plan, not to EV ownership. Buying an EV does not unlock the price simply by plugging in at home. Eligible households must be on the ULO option under the Ontario Energy Board’s Regulated Price Plan. Other households may be billed under traditional Time-of-Use or Tiered pricing, while energy retailer contracts differ. That distinction matters because the 37.7-cent rate is also specific to ULO; it is not Ontario’s universal evening electricity price.
The regulator lets qualifying residential customers choose their pricing plan, but the choice is associated with an electricity account rather than a vehicle. Customers need compatible smart meters and must submit election forms to their utilities to switch. Some separately metered apartments and condominiums cannot select the plan individually. First, check the current electricity bill to identify which price plan currently applies, before estimating any potential savings from cheaper charging.
Eight Nighttime Hours Carry the Cheapest Price
On ULO, the 3.7-cent rate runs from 11 p.m. until 7 a.m., seven days a week. The consistency matters: unlike Ontario’s Time-of-Use schedule, ULO pricing periods do not switch between summer and winter. An owner can plug in after work, delay the start, and charge through the night while they sleep. The price is assigned according to when electricity is drawn, not when the cable is connected.
The distinction becomes important near the edges of the window. On weekdays, electricity from 9 p.m. to 11 p.m. costs 14.6 cents per kilowatt-hour under ULO, while usage after 7 a.m. returns to the mid-peak price. A charging session that spills beyond the cheap hours can still make sense when necessary, but only the overnight portion receives the lowest price. Scheduling through a vehicle or compatible smart charger can make that separation almost effortless and reduce the chance of an expensive early start.
The 4-to-9 p.m. Rate Is the Real Trade-Off
Weekday evenings pose a risk for ULO households. Between 4 p.m. and 9 p.m., the rate reaches 37.7 cents per kilowatt-hour, more than ten times the overnight price. By design, the low night rate is paired with a much higher price during periods of greater demand. For someone who immediately charges after arriving home, the timing could erase much of the overnight benefit.
Consider a family preparing dinner while running laundry and heating or cooling the house. Those activities count toward the household’s ULO usage just as EV charging does. Every kilowatt-hour used during the weekday peak period faces the higher energy rate. Postponing a dishwasher cycle can be easy; delaying cooking or heating may not be. That is why a good EV charging schedule, while valuable, does not by itself prove ULO is the cheapest choice for an entire home. Electricity bills reflect household habits, not just the vehicle.
A 30-kWh Top-Up Shows the Cost Difference
A 30-kilowatt-hour home-charging top-up offers a clear demonstration of what the clock can do. If the household draws exactly 30 kWh from the grid during the 3.7-cent window, the electricity component costs $1.11. Put the same 30 kWh entirely into the weekday 4-to-9 p.m. peak and the electricity component jumps to $11.31. The difference is $10.20 for one identical amount of metered electricity. No change in vehicle or driving distance is required to create that gap. The resulting contrast is difficult to ignore.
Eight such top-ups in a month would represent 240 kWh purchased for $8.88 overnight, or $90.48 if all were bought at ULO peak prices. That $81.60 spread is a hypothetical comparison, not a promised reduction in a real bill. Charging losses, taxes, delivery fees and other household usage affect actual cost. Still, it explains why drivers who can consistently delay charging may see ULO as particularly attractive.
Traditional Time-of-Use Has a Different Trade-Off
Traditional Time-of-Use pricing offers a less extreme relationship between evening and overnight prices. Effective November 1, 2026, standard TOU off-peak costs 9.1 cents per kilowatt-hour, including weekday hours from 7 p.m. until 7 a.m. Its winter weekday peak is 18.9 cents, while mid-peak is 14.6 cents. The off-peak rate is higher than ULO’s overnight bargain, but it starts four hours earlier, giving drivers more flexibility after work.
That four-hour difference can matter more than it first appears. A vehicle drawing power at 8 p.m. on a weekday would fall into the 37.7-cent peak under ULO, but the 9.1-cent off-peak period under TOU. Even after 9 p.m., ULO charges 14.6 cents until its overnight window starts at 11 p.m. For households that cannot delay charging, TOU may be easier to manage. The right comparison is not the cheapest number on a rate chart but the hours when electricity is actually needed.
Weekends Offer a Less Expensive Middle Ground
Weekends and designated holidays offer a welcome middle ground for ULO customers. From 7 a.m. to 11 p.m. on those days, electricity costs 9.1 cents per kilowatt-hour, rather than the 37.7 cents charged on weekday peak evenings. The ultra-low 3.7-cent price still applies from 11 p.m. until 7 a.m. That gives drivers who return from a Saturday trip another option if waiting until bedtime is inconvenient.
For example, a 30-kWh metered top-up during a weekend afternoon would have an electricity charge of $2.73. The same amount used overnight costs $1.11, while a weekday peak-time equivalent costs $11.31. These figures exclude other bill components, but show why weekend timing can soften the cost of an unplanned charge. The Ontario Energy Board also publishes a holiday schedule, recognizing that some statutory holidays fall on weekdays. Those days have weekend-style daytime ULO pricing, although ordinary weekdays retain the much more expensive evening peak.
The Charging Setup Determines What Is Possible
An overnight rate helps only if a vehicle can charge before morning. Natural Resources Canada describes Level 1 charging through a standard 120-volt outlet as much slower than Level 2 charging using 208- or 240-volt equipment. Its estimates put a full Level 1 charge at eight to more than 50 hours, compared with roughly four to ten hours for Level 2. Actual duration depends on battery size, charger capability and conditions, so neither figure is a promise for a particular car.
For a commuter adding only a little energy each night, a standard outlet may be adequate. Someone replenishing a larger battery after a long drive may need a faster setup to benefit from the eight-hour ULO window. Programmable charging can start a session at 11 p.m. automatically, but installation may require an electrical assessment and a licensed contractor. Electricity savings should be weighed against hardware and installation costs, too.
Condo and Apartment Drivers Face Different Obstacles
The residential bargain is not available to every EV driver. Some apartment and condominium residents receive electricity bills from unit sub-metering providers rather than directly from an electricity utility. The Ontario Energy Board says customers in those buildings cannot switch individual price plans themselves; that decision belongs to the building’s principal consumer. A tenant may have a parking space and an individual meter without controlling the applicable electricity plan.
Drivers who rely on public chargers face another complication. Natural Resources Canada identifies several charging-fee models, including charges based on time, charging sessions, energy delivered or combinations of those methods. A station operator’s price does not automatically fall to 3.7 cents because Ontario adjusts its residential ULO schedule. For someone in shared housing, the more relevant figure may be the price at a workplace, condo garage or neighbourhood charger. Access and billing arrangements matter as much as the province’s advertised rate.
The Goal Is to Move More Power Into Quiet Hours
Ontario’s ULO plan is an attempt to change when electricity demand occurs. The Ontario Energy Board introduced the option in May 2023, with all distributors required to offer it by November of that year. The November 2026 announcement changes its prices; it does not introduce a brand-new plan. Its incentive remains the same: encourage customers to shift flexible consumption, including EV charging, away from busy periods and toward late-night hours when overall electricity demand is lower.
That distinction matters for the electricity system as well as household budgets. Canada’s energy regulator has examined how uncoordinated EV charging could increase peak demand and how delayed charging can distribute electricity use more evenly. A car plugged in after dinner can become an additional load precisely when other appliances are operating. Starting it later may help avoid that overlap. The pricing policy rewards that behaviour, but individual savings depend on the household’s pattern.
The November Prices Fell, but They Are Not Record Lows
All four ULO energy prices fell compared with November 2025. Overnight moved down from 3.9 to 3.7 cents per kilowatt-hour, while the weekday on-peak rate eased from 39.1 to 37.7 cents. Mid-peak dropped from 15.7 to 14.6 cents and weekend off-peak from 9.8 to 9.1 cents. Those are genuine reductions in the electricity commodity prices on ULO, even though the gap between nights and weekday evenings remains enormous.
But the latest overnight rate is not the lowest the province has ever offered under this plan. Ontario’s regulator listed 2.4 cents when ULO first appeared in May 2023, and 2.8 cents in November 2024. A driver who remembers those earlier prices may find the new 3.7-cent number less remarkable. The important distinction is the comparison period: rates are lower than they were last year, not lower than at every point in the plan’s history. For budgeting, current prices are what matter.
A Smaller Rebate Complicates the Total Bill
On November 1, Ontario’s Electricity Rebate fell from 23.5 per cent to 15.7 per cent. The Ontario Energy Board announced the adjustment alongside lower regulated electricity prices, meaning reduced per-kWh charges do not automatically deliver a smaller overall bill. The rebate is a credit calculated on eligible pre-tax electricity charges, including delivery and regulatory components, not simply a discount applied to an EV charging session.
A bill also includes delivery charges, regulatory fees and HST. Some delivery costs are fixed, while others depend on consumption and local utility rates. That explains why electricity advertised at 3.7 cents cannot be treated as the full all-in cost of charging at home. Nor does the 37.7-cent figure represent the entire cost of power during peak hours. Both are commodity prices. Households comparing different plans should calculate the overall bill after applicable charges and credits, particularly if their usage differs between summer and winter.
Comparing the Whole Household Is the Smartest Next Step
Eligible customers should carefully compare a year of electricity use, not just one inexpensive night. The Ontario Energy Board’s bill calculator estimates costs under ULO, Time-of-Use and Tiered pricing, including delivery, regulatory charges and the Ontario Electricity Rebate. Under Tiered prices this winter, the first 1,000 kWh a residential customer uses each month costs 11.2 cents per kilowatt-hour; additional usage costs 13.2 cents, regardless of time of day.
Switching requires an election form submitted to the utility, and a new plan begins at the start of a billing period. If a completed request arrives at least ten business days before the next billing period, the utility must apply that plan from the period’s start. Eligible customers may switch back later. For EV households, the best deal depends on when the car charges and when the rest of the home needs power—not merely the lowest number printed on a rate chart.
