EV Charging Cost Calculator (Ontario)
Estimate the monthly cost to charge an electric vehicle at home. Enter your driving and electricity price assumptions to see a realistic range.
Updated 2026-02-12
Your driving
Common range: ~14–25 kWh/100km depending on vehicle, weather, and driving.
Electricity assumptions
Home charging often loses ~5–15% to heat/conversion.
Optional: include extra delivery/GA changes you notice in practice.
How to use this tool
- Use your typical monthly kilometres (or estimate from annual km ÷ 12).
- Try multiple electricity prices to represent your plan (off‑peak vs on‑peak vs overnight).
- Run a winter scenario by increasing kWh/100km if your EV uses more in cold weather.
Educational estimator only. Your actual bill depends on plan, time periods, and other bill components.
How EV charging affects an Ontario electricity bill
Charging an electric vehicle at home increases household electricity usage, but the total cost depends on more than just the number of kilometres driven. The final impact on your monthly bill is influenced by your vehicle’s efficiency, your charging habits, your electricity pricing plan, and the time of day when charging occurs.
For many Ontario households, EV charging is still much cheaper per kilometre than gasoline. However, the monthly cost can vary noticeably depending on whether most charging happens during on-peak, off-peak, or ultra-low overnight hours.
Why time of charging matters
In Ontario, electricity pricing can change depending on the plan you choose. If you charge during lower-cost periods, your energy cost per kilometre may be significantly lower than if you charge at more expensive times of day.
This is especially important for households considering Time-of-Use or Ultra-Low Overnight pricing. Overnight charging may reduce the cost of EV ownership, particularly for drivers who travel many kilometres each month.
If you want to compare pricing plans more broadly, see our TOU vs Tiered vs ULO Calculator.
What makes EV charging costs increase?
EV charging costs rise when one or more of the following factors increase:
- more kilometres driven each month
- lower vehicle efficiency (higher kWh per 100 km)
- cold-weather driving, which often increases energy use
- charging losses from home equipment and battery management
- charging during more expensive electricity periods
Winter is especially important in Ontario. Cold temperatures can reduce battery efficiency and increase energy use per kilometre, which means your monthly charging cost may be higher than summer estimates.
How accurate is this EV charging calculator?
This tool is an educational estimator. It is designed to help Ontario households understand the relationship between kilometres driven, vehicle efficiency, electricity price, and monthly charging cost.
It does not predict an exact utility bill. Real electricity bills include other components such as delivery charges, Global Adjustment, and taxes, and those may vary depending on your utility and pricing plan. Use this calculator to compare scenarios and understand general cost patterns.