A year of driving, line by line
Ask what a car costs and almost everyone answers with gas. Gas is under a third of it. The rest never appears on a bank statement in a form you would recognise.
by The editors · · 7 min read
Ask someone what their car costs per month and you will get a number that is roughly the gas. It is a completely reasonable answer, because gas is the only part that involves standing somewhere watching a total go up. Everything else arrives annually, or once, or never as a payment at all.
So here is the whole thing, worked out with federal figures rather than estimates. The example is an eighteen-thousand-dollar used car kept eight years and sold for six thousand.
per month
$417
Fuel only
$1,558
Underestimated by
$3,445
| Item | per year |
|---|---|
| Depreciation | $1,500 |
| Insurance | $1,281 |
| Tax | $117 |
| Parking | $0 |
| Inspection | $0 |
| Fuel or electricity | $1,558 |
| Maintenance and repairs | $426 |
| Tyres | $121 |
| Total | $5,003 |
That is 45.4 cents per mile.
Assumptions behind this calculation
- Inspection, interval in years: 1
- Years kept: 8
- Miles per year: 11,026
- Excluding financing costs. If the car is on credit, interest comes on top.
- Miles per year: 11,026, the average for a light-duty short-wheelbase vehicle.[1]
- Fuel consumption: 24.7 miles per gallon for the same class, which is 4.05 gallons per hundred miles.[1]
- Gasoline: 3.49 dollars a gallon, the mean of the 52 weeks to 17 August 2026. The range across that year was 2.78 to 4.50.[2]
- Insurance: 1,281 dollars, the countrywide average expenditure per insured vehicle.[3]
- Maintenance, tires and registration: from household spending divided by the 1.8 vehicles an average household owns.[4]
The largest single line is depreciation, and it is the one that never appears as a payment. A car bought for eighteen thousand and sold eight years later for six has cost fifteen hundred dollars a year before it has moved a foot. You do not feel it monthly. You feel it once, on the day you sell, and by then it reads as bad luck rather than as the cost it was.
That is why the gas answer is so persistent. It is not ignorance. It is that gas is the only part of car ownership with a receipt.
Not necessarily sell the car. For a great many people in the United States a car is not a lifestyle choice, it is the condition of having a job, and an article that concludes otherwise is written for somewhere with trains. The useful outcome is smaller and more durable: you now know the real per-mile number, which means the next decision, a second car, a longer commute for more pay, a more expensive replacement, can be made with the whole figure instead of the gas.
Put your own numbers in
The calculator above starts from national averages. Yours will differ, and the two that move the total most are the purchase-minus-resale gap and the insurance. Both are on documents you already have.
Frequently asked
Does this include financing?
No. The calculation covers the cost of owning and running the car, not the cost of borrowing to buy it. If you have a loan, add the interest portion of your payments on top. That is deliberately separate, because a loan is a decision about money rather than about the car.
Why is inspection zero?
There is no U.S.-wide periodic inspection requirement, and where a state charges one the fee generally sits inside registration, which is already counted. Putting a number in both places would count it twice.
Sources
- Highway Statistics 2023, Table VM-1: 11,026 miles per light-duty short-wheelbase vehicle and year, 24.7 miles per gallon, Federal Highway Administration, retrieved August 22, 2026.
- U.S. Regular All Formulations Retail Gasoline Prices: 3.49 dollars per gallon as the mean of the 52 weeks to 17 August 2026, range 2.78 to 4.50, U.S. Energy Information Administration, retrieved August 22, 2026.
- Auto Insurance Database Report: countrywide average expenditure of 1,281 dollars per insured vehicle in 2023, National Association of Insurance Commissioners, retrieved August 22, 2026.
- Consumer Expenditure Survey 2024, per consumer unit: 984 dollars maintenance and repairs, 217 dollars tires, 148 dollars vehicle registration, 63 dollars vehicle property tax, 1.8 vehicles owned, U.S. Bureau of Labor Statistics, retrieved August 22, 2026.
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