How much does it cost to charge a Hyundai Ioniq 5 at home in Montana?
$14.13 for a full charge
- Per 100 miles
- $4.48
- A month at 1,000 miles
- $44.81
- Per mile
- 4.5¢
- Gas at 30 mpg, same miles
- $149.33
2026 Hyundai Ioniq 5 SE RWD, EPA 29.6 kWh per 100 miles, at Montana’s average rate of 15.1¢ per kWh (EIA, June 2026). Filling the 84.0 kWh battery from empty takes about 93.3 kWh from the wall at 90% charging efficiency. How we calculate this
Electricity versus gasoline
| Hyundai Ioniq 5 | Gas car | Difference | |
|---|---|---|---|
| Per 100 miles | $4.48 | $14.93 | $10.45 |
| A month (1,000 mi) | $44.81 | $149.33 | $104.52 |
| A year (12,000 mi) | $537.77 | $1,792.00 | $1,254.23 |
Home charging beats gas for this car as long as electricity costs less than 50.5¢ per kWh. Negative differences mean the gas car is cheaper. The 30 mpg comparison car is our assumption; see the methodology.
What it costs at other monthly mileages
| Miles a month | Energy | Electricity | Gas (30 mpg) |
|---|---|---|---|
| 500 | 148 kWh | $22.41 | $74.67 |
| 750 | 222 kWh | $33.61 | $112.00 |
| 1,000 | 296 kWh | $44.81 | $149.33 |
| 1,500 | 444 kWh | $67.22 | $224.00 |
| 2,000 | 592 kWh | $89.63 | $298.67 |
Charging in Montana compared with other states
Montana’s residential rate is the 16th cheapest of 51 states and DC, 3.2¢ below the US average of 18.3¢ (−17%). Montana’s rate is up 0.3¢ from June 2025 (14.8¢, +2.2%).
Ways to spend less
- Ask your utility about a time-of-use or EV rate and schedule charging for off-peak hours; the car or charger can do it automatically.
- Precondition the cabin while the car is still plugged in, so heating or cooling comes from the grid instead of the battery.
- Keep tires at the pressure on the door-jamb sticker; underinflated tires raise consumption.
- Drive 100 fewer miles a month: saves $4.48 at 15.1¢ per kWh.
Questions
How much does it cost to fully charge a Hyundai Ioniq 5 in Montana?
About $14.13. Filling the 84.0 kWh battery from empty takes about 93.3 kWh from the wall at 90% charging efficiency. at 15.1¢ per kWh.
How much does it cost to charge a Hyundai Ioniq 5 per month?
About $44.81 a month at 1,000 miles (15.1¢ per kWh), or $537.77 a year in Montana. At the EPA rating of 29.6 kWh per 100 miles, 1,000 miles take 296 kWh from the wall.
How much does it cost to charge a Hyundai Ioniq 5 per mile?
4.5¢ a mile, or $4.48 per 100 miles in Montana.
Is charging a Hyundai Ioniq 5 cheaper than gas?
Yes in Montana: $4.48 per 100 miles against $14.93 for a 30 mpg car at $4.48 a gallon (AAA, September 24, 2026). It stays cheaper as long as electricity costs less than 50.5¢ per kWh.
How many kWh does it take to charge a Hyundai Ioniq 5?
Filling the 84.0 kWh battery from empty takes about 93.3 kWh from the wall at 90% charging efficiency. Most charging sessions top up part of the battery, so a typical night uses less.
How does charging in Montana compare with other states?
Montana’s residential rate is the 16th cheapest of 51 states and DC, 3.2¢ below the US average of 18.3¢ (−17%). Montana’s rate is up 0.3¢ from June 2025 (14.8¢, +2.2%).
Sources
- EPA rating carrier: 84.0 kWh RWD: 129/100/114 MPGe city/hwy/combined, 318 mi EPA
- EPA rating carrier: SE/SEL/Limited RWD EPA-est. 318 mi
- U.S. EPA and DOE, fueleconomy.gov (official ratings; verify here)
- AAA, national average price of regular gasoline, September 24, 2026
- U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A: average price of electricity to ultimate customers, residential, June 2026 Figures transcribed from republications of this table on September 26, 2026; pending direct verification from the EIA API.
- Carrier page: June 2026 residential average price, citing EIA Electric Power Monthly Table 5.6.A
Usage assumptions (hours a day, season) are ours and listed on the methodology page. Found an error? Tell us.