Illinois home charging cost for the 2026 Audi Q4 55 e-tron quattro

A 2026 Audi Q4 55 e-tron quattro draws 34.6 kWh per 100 miles per the EPA; at Illinois's 19.22¢/kWh residential rate that's $6.66 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 58.5% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Audi Q4 55 e-tron quattro costs roughly $998 a year to charge at home in Illinois, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,405 a year.

Filling up the 2026 Audi Q4 55 e-tron quattro, in dollars

Covering the 2026 Audi Q4 55 e-tron quattro's EPA-rated 251-mile range takes about 86.9 kWh, which costs about $16.7 at Illinois's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 12,004 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Audi Q4 55 e-tron quattro alone ranks 140 of 400 models for efficiency; Illinois alone ranks 36 of 51 states for electricity price.

Before you install a home charger in Illinois

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.

Get quotes from local electricians for Level 2 charger installation in Illinois before deciding.

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Audi Q4 55 e-tron quattro's cost in Illinois. Illinois's 19.22¢/kWh rate ranks 36 of 51 states; the state rate guide lays out the full spread.