EV Charging Cost by State (2026)

Home EV charging cost by state varies by more than 4× across the US in 2026. In Idaho, charging a typical electric vehicle costs around $29 per month. In Hawaii, the same car costs over $120 per month. If you're an EV owner — or about to become one — knowing your state's electricity rate is the single most useful number for planning your real fuel budget.

This guide covers every state plus Washington DC, explains the math behind the numbers, and shows you exactly how to cut your monthly charging bill by 30–60% using time-of-use rates.

Disclaimer: Rates and costs here are planning estimates from public datasets — not a utility bill or tariff guarantee. Your metered rate, fees, and time-of-use windows depend on your utility. ElectrifyCalc isn't a licensed energy advisor; confirm numbers on your bill before you budget.

Key Takeaways

• At the EIA national average (~17.65¢/kWh in 2025), a typical EV at 1,100 miles/month costs about $62/month to charge vs. ~$123/month gas for the same miles at $3.35/gal
• Idaho (~10.2¢/kWh) runs about $40/month home charging; Hawaii (~43¢/kWh) runs about $169/month at the same driving assumptions
• Utility time-of-use (TOU) rate plans often cut effective charging cost 30–60% vs. flat residential rates

All electricity rates come from EIA Form EIA-861 2025 residential rate data (methodology overview). Monthly cost estimates assume 1,100 miles/month, 3.5 miles/kWh efficiency, and 12% charging loss — a realistic composite for a mid-size EV such as a Tesla Model Y or Chevrolet Equinox EV.

What Does It Actually Cost to Charge an EV at Home?

The national average residential electricity rate in 2025 is 17.65¢ per kWh (EIA, 2025). Using that rate with standard assumptions:

• Miles driven per month: 1,100
• Vehicle efficiency: 3.5 miles/kWh (EPA composite for a mid-size EV)
• Charging loss (heat, inverter inefficiency): 12%
• Effective kWh drawn from the wall per month: 1,100 ÷ 3.5 × 1.12 = ~352 kWh
• Monthly charging cost at national average: ~$62
• Annual charging cost: ~$744

Compare that to a 30 MPG gas car driving the same 1,100 miles per month at the national average gas price of $3.35/gallon: 1,100 ÷ 30 × $3.35 = $123/month, or $1,476/year.

The typical EV owner pays roughly $61 less per month in fuel costs than a comparable gas car driver — a savings of about $730/year at the national average electricity rate.

That gap widens further if you sign up for overnight time-of-use rates. More on that below.

EV Charging Cost by State — Full Table (2026)

The table below shows the 2025 EIA residential electricity rate for all 50 states plus DC, and the estimated monthly home charging cost based on the standard 1,100 miles/month, 3.5 mi/kWh, 12% loss formula.

Source: EIA Form EIA-861 2025 residential rate data. Monthly cost = (1,100 mi ÷ 3.5 mi/kWh × 1.12) × rate. Rates are statewide averages — your utility's actual rate may differ.

Cheapest States to Charge an EV at Home

Five states stand out as exceptional values for home EV charging in 2026. All five have rates below 11¢/kWh — less than 60% of the national average.

Idaho — 10.2¢/kWh (~$40/month) Idaho's abundant Columbia River hydropower keeps residential rates among the lowest in the nation year after year. At $40/month for 1,100 miles, an Idaho EV owner spends less annually on fuel than most gas drivers spend in three months.

Louisiana — 10.6¢/kWh (~$42/month) Louisiana's proximity to cheap natural gas keeps generation costs low. Monthly home charging for a typical EV is roughly $42 — about one-third of what the same miles cost in gasoline.

North Dakota — 10.7¢/kWh (~$42/month) A combination of coal and a rapidly growing wind sector gives North Dakota some of the cheapest electricity in the country. Monthly EV charging cost: ~$42.

Oklahoma — 10.8¢/kWh (~$42/month) Oklahoma's mix of natural gas, hydropower, and the second-largest wind capacity in the US drives rates well below the national average. Monthly cost for 1,100 miles: ~$42.

Wyoming — 10.9¢/kWh (~$43/month) Wyoming's coal-heavy generation mix produces very low retail rates. Monthly charging cost: ~$43.

In all five of these states, a typical EV owner spends under $500/year on home charging — and less than $600/year even after accounting for occasional public charging stops.

Most Expensive States to Charge an EV at Home

High electricity states are concentrated in Hawaii and New England, where grid infrastructure costs, limited transmission capacity, and fuel prices combine to push rates well above the national average.

Hawaii — 43.0¢/kWh (~$169/month) Hawaii's isolated island grids rely heavily on imported petroleum for generation, making it by far the most expensive state for electricity in the US. Monthly home charging for 1,100 miles costs ~$169. Even so, gasoline in Hawaii regularly exceeds $4.50–$5.00/gallon, so EV charging still comes out cheaper than fueling a gas car.

California — 33.0¢/kWh (~$130/month) California's electricity rates have climbed sharply as the grid undergoes a large-scale transition away from fossil fuels. Utility cost-of-capital, wildfire mitigation infrastructure, and transmission upgrades all appear on residential bills. However, California also offers some of the best time-of-use rates in the country — PG&E's EV2-A plan and SCE's TOU-D-PRIME plan offer off-peak overnight rates that can reduce effective charging costs by 50–65%.

Connecticut — 31.0¢/kWh (~$122/month) New England grid congestion, expensive peaker plants, and high infrastructure costs push Connecticut near the top of the national rankings. Monthly charging cost at the flat rate: ~$122.

Massachusetts — 30.0¢/kWh (~$118/month) Massachusetts faces similar structural cost pressures as Connecticut. Many Mass. utilities offer off-peak EV rates — Eversource's Time-of-Use plan cuts overnight rates significantly for enrolled customers.

Rhode Island — 28.0¢/kWh (~$110/month) Rhode Island's small grid and high infrastructure costs per customer keep rates elevated. National Grid Rhode Island offers off-peak EV charging plans worth evaluating.

Even in these expensive states, home EV charging typically beats the cost of gasoline — especially as gas prices in the Northeast and California consistently run $0.50–$1.00/gallon above the national average. The EV advantage is smaller, but it still exists.

How Time-of-Use Rates Can Cut Your Charging Cost 30–60%

The flat rate in the state table above is not the rate you have to pay. Most major utilities across the US offer Time-of-Use (TOU) plans that charge different prices depending on when you use electricity. During overnight hours — typically 10 PM or 11 PM through 6 AM or 7 AM — demand is low, grid capacity is available, and utilities price accordingly.

EV owners are the ideal TOU customer: you need to add a large, predictable block of energy every night, and the car sits still for hours. You don't need to do anything — you just set a scheduled departure time and let the charger do the rest.

Real-world TOU examples:

• PG&E (California): EV2-A off-peak rate ~12¢/kWh vs. peak rate ~48¢/kWh. Charging overnight instead of at peak cuts your per-kWh cost by over 75%.
• Duke Energy (Carolinas): Off-peak rate ~9¢/kWh vs. on-peak ~18¢/kWh. Overnight charging cuts cost approximately in half.
• ComEd (Illinois): Hourly Pricing plan averages ~7–8¢/kWh overnight vs. standard ~15¢/kWh. Potential savings: ~50%.
• Xcel Energy (Colorado/Minnesota): EV Accelerate At Home rate offers off-peak rates in the 5–8¢/kWh range for dedicated EV charging circuits.

Across the country, utilities with TOU programs typically offer 30–60% discounts off the standard flat rate during off-peak hours. Applying a conservative 40% discount to the national average rate of 17.65¢/kWh:

• Standard rate charging: ~$62/month
• Off-peak TOU charging: ~$37/month
• Annual savings: ~$300/year — just by shifting when you charge

How to sign up:

1. Visit your utility's website and search for "EV rate," "TOU rate," or "time-of-use plan"
2. Compare the off-peak rate against your current standard rate
3. Check whether the plan covers your whole home or offers a separate EV meter — separate EV meter plans are often the best deal
4. Enable scheduled charging in your EV app or Level 2 charger app and set your departure time
5. Enroll online or by phone — most utilities allow instant enrollment

EV Charging vs. Gas: Monthly Cost Comparison

Here is the full fuel cost comparison across scenarios, using the same 1,100 miles/month baseline:

Gas price: DOE Alternative Fuels Data Center national average, May 2026. EV efficiency: 3.5 mi/kWh + 12% charging loss.

The key insight from this table: TOU rates in high-cost states often bring EV charging cost down to or below the national flat-rate average. A California EV owner on a TOU plan can end up paying less per month than the national average, despite California having one of the highest flat electricity rates in the country.

Tips to Lower Your Monthly EV Charging Cost

Beyond TOU enrollment, here are the most effective ways to reduce what you spend charging at home:

Charge at night, every night. Even without a formal TOU plan, many utilities have lower overnight rates or lower grid stress during off-peak hours. Get in the habit of plugging in when you get home and letting the car charge overnight.

Use your EV's built-in scheduled charging. Every modern EV — Tesla, Ford, GM, Hyundai/Kia, BMW, Rivian — has a built-in scheduled charging feature. Set your target departure time and the car charges only during your preferred window. No smart charger required.

Upgrade to a Level 2 charger if you haven't already. A 240V Level 2 charger is 3–4× faster than a 120V outlet and runs more efficiently, reducing the effective charging loss. Many utilities and states offer rebates that bring the installed cost of a Level 2 charger to $100–$300 after incentives.

Apply for your utility's EV charger rebate. The Section 30C federal tax credit for EV charging equipment (30%, up to $1,000 for homeowners) is still in effect through June 2026 — see IRS credits and deductions. Check with your utility for additional stacked rebates — some offer $200–$500 on top of the federal credit.

Track your real efficiency. Most EVs report real-world consumption in kWh/100 miles. Your car's actual efficiency may be better or worse than the EPA estimate depending on climate, driving style, and highway vs. city mix. Better efficiency directly reduces your monthly charging bill.

Consider workplace or public charging when it's free. Many employers, parking garages, and retail destinations offer free Level 2 charging. Any kWh you add away from home at no cost reduces your home electricity draw.

How to Calculate Your Exact Monthly Charging Cost

The formula is straightforward:

(Monthly miles ÷ Vehicle efficiency in mi/kWh) × Charging loss factor × Electricity rate = Monthly cost

Example: You drive 900 miles/month in a Tesla Model 3 (4.0 mi/kWh EPA) and your Illinois rate is 15.8¢/kWh.

• Wall draw: 900 ÷ 4.0 × 1.12 = 252 kWh
• Monthly cost: 252 × $0.158 = $39.82

Typical charging loss factors:

• Level 2 (240V): 10–12%
• Level 1 (120V): 15–18% (slower charging = more overnight losses)

Vehicle efficiency varies significantly. The Tesla Model 3 RWD achieves roughly 4.4 mi/kWh under EPA conditions; an F-150 Lightning Extended Range achieves about 2.0 mi/kWh. Cold climates reduce efficiency by 10–30% in winter months.

Use the ElectrifyCalc Charging Cost Calculator to enter your specific vehicle, state, mileage, and rate — it applies the current EIA rate for your state and calculates your exact monthly and annual cost automatically. For charge duration at a given amperage, use the Charging Time Calculator.

Sources

• U.S. Energy Information Administration — Form EIA-861 2025 Annual Electric Power Industry Report (residential average retail price by state)
• DOE Alternative Fuels Data Center — National average gasoline price, May 2026
• EPA Fuel Economy Guide — Vehicle efficiency ratings (miles/kWh)
• IRS — Credits and deductions (30C and related)

Estimates are based on statewide average residential electricity rates. Your actual rate depends on your specific utility, rate class, and any applicable fees or taxes. Consult your utility bill for your exact rate. ElectrifyCalc is not a licensed energy advisor — these calculations are for planning purposes only.

Ready to see your personalized number? Use the ElectrifyCalc Charging Cost Calculator — enter your vehicle, state, and monthly mileage to get your exact monthly and annual home charging cost.