Missouri EV vs gas · Gas October 12, 2026 · Electricity rates 2025
Yes, by a lot. On Ameren Missouri's average home rate, charging an EV costs the same per mile as gas at $1.07 a gallon. Gas in the St. Louis area (Missouri side) averaged $3.91 on October 12, 2026, so 1,000 miles a month costs about $40 to charge versus $145 in gas: roughly $105 a month back.
What you pay for power sets what charging costs. Here are the numbers for St. Louis.
Serves St. Louis and much of eastern Missouri
Average home rate 13.3 cents per kWh (2025). Charging costs the same per mile as gas at $1.07 a gallon: about $40 for 1,000 miles versus $145 in gas.
Across the river, the Illinois side is served by Ameren Illinois at different rates.
Gas prices jumped in 2026 when the war with Iran disrupted oil shipping through the Strait of Hormuz. Home electricity is priced by utilities under state regulators and moves far more slowly, so the gap tends to widen when gas spikes. For a 27 mpg car to cost less per mile than charging at home in St. Louis, gas would have to fall below $1.07 a gallon.
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Missouri charges EV owners an extra ~$159/yr at registration (about $84/yr for plug-in hybrids). Even after that, charging on Ameren Missouri leaves about $1,102 a year in your favor at 12,000 miles.
Missouri has no state EV help. Evergy pays up to $500 toward home charger installation on a time-of-use rate (into March 2027). The EV decal is $150/yr.
Missouri EV incentives · EV fees by state
We assume 1,000 miles a month, a typical new EV that uses 30 kWh per 100 miles, a 27 mpg gas car, and home charging at each utility's average residential rate, which includes its fixed monthly charges. An overnight or EV rate is often cheaper than that average, and public fast charging costs much more. Treat this as the honest average, not your bill.
Sources: EIA Form 861, 2025 (each utility’s residential revenue divided by residential sales), AAA metro gas price averages (regular unleaded), October 12, 2026
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Yes. Charging at home on Ameren Missouri (13.3 cents per kWh, 2025) costs about $40 per 1,000 miles. The same miles in a 27 mpg car cost about $145 at the $3.91 St. Louis gas average on October 12, 2026. Missouri's ~$159/yr EV fee still leaves about $1,102 a year in your favor.
About $1.07 a gallon. That is what a 27 mpg car would need to pay to match the cost per mile of charging at home on Ameren Missouri.
At home, about $40 per 1,000 miles on Ameren Missouri (13.3 cents per kWh), for a typical EV that uses 30 kWh per 100 miles. Public fast charging costs much more per kWh than home charging, so these numbers assume you charge at home most of the time.
Missouri has no state EV purchase rebate right now, but utilities here add their own: Ameren Missouri (~6¢ to 9¢/kWh overnight). Check the utility's page before you buy; programs fill up and change.
Thinking of buying? Run any dealer quote through the free Deal-Checker before you sign.