Calculator
Home EV Charging Cost Calculator
Estimate your weekly, monthly, and annual home charging bill — and see exactly how much you save with time-of-use (TOU) overnight rates vs flat-rate billing.
Monthly cost (TOU)
$0
How home charging cost is calculated
Weekly energy use is your miles driven divided by your EV's efficiency. Multiply by your weighted electricity rate (combining peak and off-peak) and divide by charging efficiency for the as-billed kWh:
kWh/week = miles / efficiency / charging efficiency
weighted rate = (off-peak% × off-peak rate) + ((1 − off-peak%) × peak rate)
weekly cost = kWh/week × weighted rate
Example: 230 mi/week, 3.5 mi/kWh, 90% charging efficiency = 73 kWh/week. At 80% off-peak ($0.10) and 20% peak ($0.30), weighted rate is $0.14/kWh → $10.22/week, or about $531/year.
Frequently asked questions
How much does it cost to charge an EV at home each month?
For an average driver (1,000 miles/month, 3.5 mi/kWh EV, $0.16/kWh electricity), home charging costs about $46/month — or roughly $550/year. With time-of-use rates and off-peak charging at $0.10/kWh, the same usage drops to around $29/month ($350/year).
Are time-of-use (TOU) rates worth switching to?
For EV owners who can charge overnight, almost always yes. TOU plans typically charge $0.08–$0.12/kWh overnight (off-peak) and $0.30–$0.40/kWh during the day (peak). If you charge 80%+ at home during off-peak hours, you can cut your charging bill by 30–50%. Verify with your utility — most major US utilities offer EV-specific TOU plans.
Does the calculator include the Level 2 charger installation cost?
No — this is for ongoing electricity costs only. A Level 2 home charger costs $400–800 for the hardware and $500–2,000 for installation depending on panel proximity and amperage upgrades. The federal tax credit covers 30% of the installation cost up to $1,000.
Why is my actual utility bill higher than this estimate?
The calculator uses your delivery rate ($/kWh consumed). Your full utility bill also includes fixed monthly charges (service fee, distribution charges, taxes) that don't vary with usage. Those add $15–40/month regardless of how much you charge. To isolate just the EV impact, look at your "energy used" line, not the total.