What does it actually cost to keep a vehicle on the road?

For a commercial fleet the figure is different and the structure is different — because a fleet vehicle that isn't moving isn't just costing money, it's failing to earn any.

That distinction is the whole subject of this article. Most cost-of-ownership analysis is written for someone who owns one car and drives it to work. Once a vehicle exists to generate revenue, a category of cost appears that no ownership study measures: the cost of the vehicle being unavailable, and the cost of the coordination required to make it available again.

What goes into the cost of keeping a vehicle on the road?

AAA's 2025 study breaks the annual cost of a new vehicle driven 15,000 miles into six components. Depreciation is the largest at $4,334 a year. Insurance averages $1,694. Finance charges come to $1,131. Licence, registration and taxes total $813. Fuel runs at 13.0 cents per mile, and maintenance, repair and tyres at 11.04 cents per mile.

Two things stand out when you lay those side by side.

The first is that the costs are dominated by ownership rather than operation. Depreciation and finance together account for more than $5,400 a year before the vehicle has turned a wheel.

The second is that maintenance and repair — the entire reason the aftermarket exists — is one of the smallest lines on the list. At 15,000 miles a year, 11.04 cents per mile works out to roughly $1,656. Less than insurance. A third of depreciation.

Why is the smallest line item the one that causes the most trouble?

Because maintenance is the only cost on that list that determines whether the vehicle is available.

Depreciation happens whether the vehicle moves or not. Insurance and registration are annual and fixed. Fuel is a function of use, and use is the thing you want. Maintenance and repair is the only line that can stop the asset from working — and the only one where the money spent is a poor proxy for the disruption caused.

A $180 brake job that takes four days to complete costs far more than $180 to a business whose vehicle was earning during those four days. The invoice records the parts and the labour. It records nothing about the four days.

What does a vehicle cost when it isn't moving?

Fleet operators typically put the cost of an idle vehicle somewhere between $500 and $1,500 a day, depending on what the vehicle does and what it earns. A rideshare vehicle off the road has a fairly precise daily value. A delivery van in a fixed route network has a replacement cost — either an idle driver or a hired substitute. A municipal or utility vehicle has a service obligation attached to it.

Run that against the maintenance line above. We've broken the daily arithmetic down separately in what vehicle downtime actually costs a fleet operator.

Why doesn't the cost of coordination show up anywhere?

Because it's absorbed by people rather than invoiced.

Consider what actually happens when a fleet vehicle needs work. Someone notices a fault or a service interval. Someone calls a shop. Someone gets a callback, or doesn't. The vehicle is dropped off. A diagnosis happens, and an estimate is produced. Someone at the fleet has to approve it, which requires reaching a person with authority and a view of the budget. The shop waits. Parts are ordered. The vehicle waits. Someone at the fleet asks where the vehicle is. Someone at the shop stops working to answer. The vehicle is finished. Someone collects it. An invoice arrives, is queried, is reconciled, is paid.

None of that is repair. All of it is coordination, and it is paid for in three currencies at once: the fleet's admin hours, the shop's unbilled time answering status questions, and the days the vehicle spends sitting still while messages travel between the two.

The industry's structure makes this harder rather than easier. There are more than 300,000 independent repair shops in the United States, according to IBISWorld and Cox Automotive data, and a fleet of any size will use dozens of them. Each relationship is bilateral, run by phone and email, with no shared record of what was agreed or when it will be done.

How should an operator actually measure the cost?

Cost per mile is the standard metric, and it's the wrong one for this purpose. It tells you what the vehicle costs when it works. It says nothing about the days it didn't.

A more useful measure is cost per available day: total annual cost divided by the number of days the vehicle was actually able to earn. It is a harder number to produce, because most fleets can't say with confidence how many days each vehicle spent unavailable, or where those days went. That difficulty is itself the finding. If you can't measure the days you lost, you can't tell the difference between a slow shop, a slow approval process, and a parts problem — and those three have completely different fixes.

The short version

The cost of keeping a vehicle on the road is not mainly the cost of repairing it. Repair is a small share of ownership cost and a poor predictor of disruption. The larger cost sits in the days a vehicle spends waiting, and the coordination burden that creates those days — and neither appears on any invoice, which is precisely why the industry has tolerated them for so long.

Autograff is being built around this problem. ShopOS is our product for repair shops and FleetOS is our product for fleet operators, and both exist because the gap between those two parties is where the money in this industry quietly goes.

Key facts

• A typical new vehicle driven 15,000 miles a year costs about $11,577 to run, according to AAA's 2025 Your Driving Costs study.
• Depreciation is the single largest line at $4,334 a year; depreciation and finance together exceed $5,400 before the vehicle moves.
• Maintenance, repair and tyres run at 11.04 cents per mile — roughly $1,656 a year, less than insurance and a third of depreciation.
• Maintenance is the only cost line that determines whether the vehicle is available at all.
• Fleet operators typically put the cost of an idle vehicle at $500–$1,500 per day.
• Cost per available day is a more useful fleet metric than cost per mile, because it captures the days the vehicle couldn't earn.