Home charging costs less than public charging, but the math depends on your local electricity rate and how often you use fast chargers

The cost to charge an electric vehicle breaks into two parts: the electricity itself, and the equipment or network you use to deliver it. Charging at home on a standard outlet costs roughly half what you pay at a public fast charger, but home charging takes longer. Public charging networks charge by the minute, by the kilowatt-hour, or by a flat session fee — the structure varies widely and affects what you actually spend.

A typical EV battery holds 40 to 100 kilowatt-hours. At the U.S. average residential electricity rate of around 16 cents per kilowatt-hour, charging a 60-kilowatt-hour battery at home costs roughly $9.60. That same charge at a public DC fast charger, which often costs 35 to 50 cents per kilowatt-hour, runs $21 to $30. Your local electricity rate, the charger network you use, and the time of day you charge all shift these numbers.

Key Takeaways

  • Home charging on a standard 120-volt outlet costs the least per kilowatt-hour but takes 24 to 48 hours for a full charge; a dedicated 240-volt home charger costs $500 to $2,500 to install but cuts charging time to 4 to 10 hours.
  • Public DC fast chargers cost 35 to 50 cents per kilowatt-hour on average, though some networks charge by the minute instead, making the total cost harder to predict in advance.
  • Electricity rates vary by state and utility — charging in Louisiana costs roughly half what it costs in Hawaii, so your location shapes your long-term fuel cost.
  • Subscription plans from networks like Electrify America or EVgo can lower per-session costs if you use public chargers regularly, but only pay off if you charge away from home at least weekly.

How home charging costs break down

Charging at home uses the electricity rate your utility charges you. Most utilities charge a single rate year-round, though some offer time-of-use rates that drop during off-peak hours — typically late evening or early morning. If your utility offers time-of-use rates, charging between 9 p.m. and 6 a.m. can cut your per-kilowatt-hour cost by 30 to 50 percent.

The equipment you install affects how fast you charge and how much you spend on installation. A standard 120-volt outlet (the kind in most homes) charges at roughly 2 to 3 miles of range per hour — a full charge takes 24 to 48 hours. A dedicated 240-volt Level 2 charger, installed by a licensed electrician, charges at 7 to 30 miles of range per hour depending on the charger's power rating. Installation costs range from $500 to $2,500, depending on how far the charger is from your electrical panel and whether your home's service needs an upgrade.

Once installed, a Level 2 charger adds roughly $15 to $30 per month to your electricity bill if you charge daily. That cost is the electricity itself, not a separate network fee — you own the charger and pay only for the power it uses.

Public charging networks and their pricing models

Public chargers fall into two categories: Level 2 chargers at parking lots and shopping centers, and DC fast chargers on highways and at commercial hubs. Level 2 public chargers typically cost $1 to $3 per hour or $2 to $5 per session. DC fast chargers, which add 200 to 300 miles of range in 20 to 40 minutes, cost 35 to 50 cents per kilowatt-hour at most networks.

The largest DC fast-charging networks are Electrify America, EVgo, and Tesla's Supercharger network (now open to non-Tesla vehicles at most locations). Electrify America charges 43 cents per kilowatt-hour as of early 2024, though prices vary by location and time of day. EVgo charges between 35 and 50 cents per kilowatt-hour depending on the charger's power output. Tesla Superchargers charge roughly 35 to 50 cents per kilowatt-hour for non-Tesla vehicles, though Tesla owners pay less.

Some networks charge by the minute instead of by kilowatt-hour, which creates unpredictability. A 20-minute fast-charge session at a per-minute rate can cost $8 to $15 depending on the network and location. Always check the network's app before you plug in — the rate is displayed before charging starts.

Subscription plans and membership discounts

Most major charging networks offer monthly or annual memberships that lower the per-kilowatt-hour rate. Electrify America's membership plan costs $4 per month and reduces the per-kilowatt-hour rate from 43 cents to 35 cents — a savings of about $1.20 per 30-kilowatt-hour charge. EVgo's membership costs $9.99 per month and drops rates from 40 to 50 cents per kilowatt-hour down to 26 to 33 cents, depending on the charger type.

These memberships only make financial sense if you use public chargers at least once a week. If you charge at home most of the time and use public chargers only for road trips, the monthly fee will cost more than you save. Calculate your typical monthly public charging cost, then compare it to the membership fee before signing up.

How location and time of day affect what you pay

Electricity rates vary dramatically by state and utility. Hawaii's average residential rate is roughly 35 cents per kilowatt-hour, while Louisiana's is around 10 cents. Charging an EV in Hawaii costs three times more than in Louisiana for the same amount of electricity. If you live in a high-rate state, the financial case for home charging strengthens — you save more per charge compared to public chargers.

Some utilities offer time-of-use rates that reward charging during off-peak hours. Pacific Gas and Electric in California, for example, charges roughly 20 cents per kilowatt-hour during peak hours (4 p.m. to 9 p.m.) but drops to 12 cents during off-peak hours (9 p.m. to 6 a.m.). Charging during off-peak hours saves about $4.80 per 60-kilowatt-hour charge. Check your utility's website or your latest bill to see whether time-of-use rates are available in your area.

Public fast chargers also vary by time of day at some networks. Electrify America charges higher rates during peak driving hours (typically 4 p.m. to 9 p.m.) and lower rates during off-peak times. Charging at 2 a.m. costs less than charging at 6 p.m., though the difference is usually 5 to 10 cents per kilowatt-hour.

Comparing total cost to gas vehicles

To compare EV charging costs to gasoline, convert both to cost per mile. A typical EV uses about 0.25 kilowatt-hours per mile. At the U.S. average residential rate of 16 cents per kilowatt-hour, that works out to 4 cents per mile. A typical gas car gets 25 miles per gallon; at $3.50 per gallon, that's 14 cents per mile. Home charging costs roughly one-third what gasoline costs.

Public fast charging narrows that advantage. At 45 cents per kilowatt-hour, an EV costs 11 cents per mile — closer to gasoline but still cheaper in most places. The longer you can charge at home, the lower your average cost per mile.

These numbers assume current electricity and gas prices. Both fluctuate with wholesale markets, so your actual cost will shift over time. Your state's electricity mix also matters — charging in a state with cheap hydroelectric power costs less than charging in a state relying on expensive natural gas.

Workplace and destination charging

Many employers offer free or low-cost charging to employees, which can eliminate your public charging costs entirely if you charge during work hours. Some shopping centers, hotels, and restaurants offer free Level 2 charging as an amenity. If your workplace or a place you visit regularly offers free charging, factor that into your total cost — it can cut your average charging expense by 30 to 50 percent.

Destination chargers at hotels and resorts are often free for guests. If you travel regularly and stay at hotels with charging, you can reduce your road-trip charging costs significantly. Check the PlugShare app or your vehicle's navigation system to find free chargers along your route before you leave.

Frequently Asked Questions

Does charging overnight at home cost less than charging during the day?

Only if your utility offers time-of-use rates and off-peak hours include nighttime. Check your utility's rate schedule or call their customer service line to confirm. If your utility charges a flat rate year-round, the time of day makes no difference to your bill.

What's the cheapest way to charge an EV?

Home charging on a 240-volt Level 2 charger during off-peak hours, if your utility offers time-of-use rates. If your utility charges a flat rate, home charging on any outlet is cheapest. Public fast chargers are the most expensive option per kilowatt-hour.

Should I install a home charger if I only drive short distances?

A 120-volt outlet charges slowly but costs nothing to install. If you drive fewer than 30 miles per day and can charge overnight, a standard outlet may be enough. A 240-volt charger makes sense if you drive 30 to 100 miles daily or want faster charging for convenience.

Do I have to pay a monthly fee to use public chargers?

No. Most networks charge per kilowatt-hour or per minute without requiring a membership. Memberships lower the per-unit cost but add a monthly fee, so they only save money if you charge publicly at least weekly.

How much does it cost to charge an EV on a road trip?

A 200-mile road trip using DC fast chargers costs roughly $15 to $25 in charging fees, depending on the network and your vehicle's efficiency. Home charging for the same distance costs $4 to $6. Road-trip charging is more expensive per mile because fast chargers charge higher rates.