2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels): home charging cost in Iowa

A 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) draws 28.5 kWh per 100 miles per the EPA; at Iowa's 13.77¢/kWh residential rate that's $3.93 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home costs a fraction of what gas would here: 75.5% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) charged at home in Iowa costs about $589/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,814 a year.

What one full charge costs

A 2026 BMW i4 eDrive40 Gran Coupe (18 inch wheels) needs roughly 95 kWh to reach its EPA-rated 333-mile range, which runs about $13.08 at 13.77¢/kWh in Iowa.

Where this ranks

This combination ranks 760 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The BMW i4 eDrive40 Gran Coupe (18 inch wheels) alone ranks 31 of 400 models for efficiency; Iowa alone ranks 9 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Line up a few Iowa electrician quotes for Level 2 install before you commit either way.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Iowa's 13.77¢/kWh compares? The guide to charging cost by state ranks every state side by side.