How much does it cost to charge an Audi Q4 e-tron?

A full charge for a 2025–2026 Audi Q4 e-tron 45 RWD costs about $15.03 at home, at the US average residential electricity rate of 18¢/kWh. Filling up the same car costs $10.31 in Idaho, the cheapest state, and $27.77 in California — your own rate decides it.

That full charge draws roughly 84 kWh from the wall and buys 288 miles of EPA-rated range — about $0.052 a mile.

What it costs at three real electricity rates

Your rate is the only input that really moves this number, so here is the same car at three real ones — the cheapest state, the national average, and the most expensive large mainland market.

Hawaii is higher still at 52¢ — a 4.2:1 spread from the cheapest state to the dearest. EPA figures checked September 2026; electricity rates checked August 2026.

What it costs per mile

An Audi Q4 e-tron costs about $0.052 a mile to charge at home at the US average electricity rate, or $5.22 per 100 miles. That is energy only — the EPA rates this car at 29 kWh per 100 miles measured at the wall socket, so charging losses are already inside the figure and should not be added again.

Per mile is the number that survives a change of car: it does not care about battery size, so it is the only fair way to line this car up against one with a much bigger or smaller pack.

What it adds to your electricity bill

Charging an Audi Q4 e-tron at home adds about $52 a month to your electricity bill at the US average rate, driving 12,000 miles a year. That is the yearly cost of $626 spread evenly across twelve months — a month with a road trip in it costs more, and a quiet one costs less.

Nothing else on the bill changes: the car draws the same kilowatt-hours whatever else is running in the house, so the increase is the charging and nothing more.

At the cheapest state rate the same driving adds $36 a month, and $96 at the most expensive — the table above has all three. If your utility offers an overnight or time-of-use rate, charging on it lands at the low end rather than the middle.

Where the numbers come from

The EPA rates this 45 RWD at 29 kWh per 100 miles with 288 miles of combined range. Those two figures together give the energy for a full charge, which is where the 84 kWh above comes from.

We work it out that way rather than quoting a battery size on purpose. Manufacturers publish gross capacity, which includes a buffer at each end of the pack that never takes a charge, so a cost built on it overstates your bill. And the EPA measures at the wall socket rather than at the battery, so charging losses are already inside the figure — no need to add them, and adding them would count the same loss twice.

What this means for this car

The rear-wheel-drive Q4 45 e-tron is rated 29 kWh per 100 miles with 288 miles of EPA range, identical in the 2025 and 2026 listings. That beats the Volkswagen ID.4 it shares its underpinnings with, at 30, and matches the BMW i4 eDrive40 on 18-inch wheels. It is also a clear step up from the rear-drive Q4 it replaced: the 2023 rear-drive car, listed as the Q4 40 e-tron for 2024, was rated 33 kWh per 100 miles with 265 miles, so a 2025 or 2026 car uses about 12% less energy per mile and goes 23 miles further on a charge. Quattro is where the running cost climbs. The 2026 Q4 55 e-tron quattro is rated 35 kWh per 100 miles with 251 miles — slightly worse than the 2025 version’s 34 and 258 — which is about a fifth more energy per mile than the rear-drive car. The older quattro models, 2022 to 2024 and listed as the Q4 50 e-tron quattro for 2024, were rated 36. The Sportback body costs nothing extra at the socket: in every year the EPA rates it the same per mile as the regular Q4 with the same drivetrain, so the roofline is a style choice and not a running-cost one.

How it compares

All at 18¢/kWh and 12,000 miles a year. The gas comparison is illustrative — it is not a claim about any particular car.

Figures are for the 2025–2026 Audi Q4 e-tron 45 RWD. Other trims of the same car are rated differently — see above. How these figures are calculated.