Every article about EV charging costs quotes a national average, and the national average is almost useless to you. Residential electricity rates vary by more than a factor of three across US states, and within a state they vary again by utility and by tariff. An average built across all of that describes nobody's actual bill.
So this hub does something different: it shows the arithmetic and lets you put your own numbers in. There are only two inputs you need, and you can find both in about five minutes.
(miles driven / 100) x kWh per 100 miles x $ per kWh / 0.9
= your actual charging cost
The 0.9 accounts for charging losses — roughly 10% of what the meter records never reaches the battery. Your kWh per 100 miles is on the EPA window sticker and on fueleconomy.gov; your $ per kWh is on your utility bill.
A worked example. A Tesla Model Y Long Range is EPA-rated at 27.5 kWh per 100 miles. Drive 1,000 miles in a month, at a residential rate of 16 cents per kWh:
(1000 / 100) x 27.5 x 0.16 / 0.9
= $48.89 for the month
EPA efficiency figure from the US DOE / EPA fueleconomy.gov service, 2026 Model Y Long Range AWD, checked October 5, 2026. Substitute your own rate and mileage.
The 2026 rebate position, stated plainly
What remains is state and utility programs, and those are genuinely worth chasing — several utilities will effectively pay for a substantial part of a charger or offer a dedicated EV tariff that pays back faster than any one-time rebate. Those are local, they change often, and the only reliable place to check is your own utility's website.
Time-of-use is usually the biggest lever
For most households, switching to a time-of-use or dedicated EV tariff and charging overnight saves more money per year than any equipment decision. The spread between on-peak and off-peak residential rates is frequently 2-3x, and a car that charges unattended between midnight and 6am is the perfect load to shift.
This is also the one case where a smart charger earns its premium: if the charger enforces the window, it does not matter which car is plugged in or whether someone remembered to set a schedule. Time-of-use rates and EV charging works through how to evaluate the tariff your utility offers.
Home against public charging
Home charging is almost always cheaper, often dramatically, and the gap is widest against DC fast charging. The US Department of Energy's figures give Level 2 at approximately 25 miles of range per hour of charging against 100 to 200+ miles per 30 minutes for DC fast charging — you pay for that speed, and at home you do not need it. The honest exception is the household that cannot install a charger at all, where public charging is not a comparison but the whole plan.
What we will not do on these pages
- Quote a monthly cost as though it were a fact. It depends on your rate and your mileage, so we give you the formula.
- Present an expired tax credit as available. That is the single most common error in this category right now.
- Predict future electricity prices or future incentives.
- Use a payback calculation that quietly assumes you would otherwise have bought gasoline at a particular price.
