Charging an electric car at home in 2026 costs about $5.40 per 100 miles at the national average residential rate — roughly a third of what a 30-MPG gas car burns at September’s $4.48 gasoline. For a typical 12,000-mile year, that’s about $650 of electricity against $1,790 of gas: a saving near $1,140 a year, wider than it was twelve months ago because gas spiked while electricity barely moved. But the number moves enormously with your state’s rate, your charger, and when you plug in — from under $4 per 100 miles in cheap-power states to double the average in Hawaii. Here is the complete home-charging math for 2026.
The Basic Math
Two numbers do all the work: your EV’s efficiency (in kWh per 100 miles) and your electricity rate (in cents per kWh). Multiply them and you have cost per 100 miles.
The 2026 national inputs: the average EV consumes around 30 kWh per 100 miles in mixed driving, and the average US residential electricity rate is 18.31¢ per kWh (EIA, July 2026) — AAA’s 2026 driving-cost study pegs the home-charging average almost identically at 18.0¢. The result: 30 × $0.183 = $5.49 per 100 miles, or $659 a year at 12,000 miles.
Against gasoline: a 30-MPG car at $4.478 a gallon (EIA, week of September 21, 2026) costs $14.93 per 100 miles — $1,791 a year. The EV’s charging bill is about 63% lower, which matches AAA’s own 2026 finding that home EV charging runs 66 to 70% cheaper than fueling with gas.
Where Your State Changes Everything
Electricity is priced state by state, and the 2026 spread is enormous: roughly 13¢ per kWh in Utah against 48¢ in Hawaii (EIA, July 2026). The same 30-kWh-per-100-miles EV costs:
| Electricity rate | Per 100 miles | Per year (12,000 mi) |
|---|---|---|
| 13¢ (Utah-class) | $3.90 | $468 |
| 18.3¢ (US average) | $5.49 | $659 |
| 25¢ (Northeast-class) | $7.50 | $900 |
| 48¢ (Hawaii) | $14.40 | $1,728 |
Read that last row twice: in Hawaii, home charging costs the same per mile as gassing up a 37-MPG car on the mainland. The EV’s fuel advantage isn’t a constant — it’s a function of your utility, and in the highest-cost states it can vanish entirely. Conversely, in cheap-power states the saving against 2026 gas approaches 80%.
Two modifiers matter as much as geography. Time-of-use plans charge far less overnight — often 30 to 40% below the flat rate in EV-friendly markets — and since an EV charges happily at 2 a.m., a TOU plan is free money for homeowners who can switch. And charging efficiency: some power is lost as heat in the car and charger, typically 10% or so, which nudges real bills slightly above the raw math.
The Charger Itself: Level 1 vs Level 2
Level 1 (the included cord, 120V): free to use, adds only 3 to 5 miles of range per hour — about 40 miles overnight. Fine for a plug-in hybrid or a short commuter; impractical as an EV’s only charging for anyone driving real miles.
Level 2 (240V, the real answer): 25 to 35 miles of range per hour, full overnight on any EV. The hardware is a few hundred dollars for a mainstream 40-amp unit, and installation runs a few hundred more with an electrician adding a 240V circuit — call it $500 to $1,500 all-in depending on your panel and run distance, a typical-range estimate that varies with the house. That’s the one-time cost that unlocks the cheap per-mile math above; spread over five years it adds $8 to $25 a month to effective ownership, which barely dents the $95-a-month fuel saving against the average gas car.
What It Adds to Your Electric Bill
The honest way to feel the number: a 12,000-mile-year EV adds roughly 220 kWh a month to your bill at 30 kWh per 100 miles — about $40 a month at the national average rate, on top of whatever the household already uses. In cheap-power states that’s under $30; in Hawaii-class markets, over $100.
Compare that monthly figure to your gas spending and the decision gets concrete: if you currently spend $200 a month on fuel and would spend $40 on charging, the operating-cost case is closed regardless of what you think about the cars. The cases where home charging doesn’t save money: reliance on public fast-charging (which costs meaningfully more per kWh and erodes much of the advantage), and renters paying commercial rates for a shared panel, where “home charging” may not be home-rate charging.
The Bottom Line
Home charging in 2026 costs about $5.50 per 100 miles at the national average rate — $40 a month for a typical driver, $659 a year — and runs 63 to 70% cheaper than gassing up at $4.48. The number is built from just two inputs you can look up in a minute: your EV’s kWh-per-100-miles and your utility’s rate (plus your time-of-use plan, if the switch is available). The charging saving is real but it is only one line — for the full five-year ledger, including the depreciation that offsets it, see the EV vs gas comparison and run your candidates through the car cost of ownership calculator.
FAQ
How much does it cost to charge an EV at home per month?
About $40 a month at the national average rate for a driver covering 12,000 miles a year in a 30-kWh-per-100-miles EV — roughly 220 kWh added to the bill at 18.31¢ per kWh (EIA, July 2026). Cheap-power states run under $30; Hawaii-class rates can exceed $100.
Is charging an EV cheaper than gas?
Yes, substantially: home charging costs about $5.40 per 100 miles against $14.93 for a 30-MPG car at September 2026’s $4.478 gas — a 63% saving, which matches AAA’s finding that home charging runs 66-70% cheaper. The advantage narrows in high-rate states and for drivers dependent on public fast chargers.
How much does it cost to install a home EV charger?
A mainstream Level-2 (240V) charger unit costs a few hundred dollars, and professional installation of the circuit typically brings the all-in total to roughly $500-$1,500 depending on panel capacity and wiring run — a typical-range estimate that varies house to house. Level 1 charging on a regular outlet is free to set up but too slow to be an EV’s only option.
Does charging an EV at home raise your electric bill a lot?
It adds what the driving costs: about 220 kWh a month for a typical 12,000-mile year, or roughly $40 at the national average rate. On a time-of-use plan with overnight charging, the same driving can cost 30-40% less. Check your utility’s rate and your candidate EV’s efficiency — those two numbers are the whole calculation.