Maintenance Cost Calculator

What a year of vehicle maintenance costs

Maintenance is the part of vehicle ownership you can plan. Fuel moves with the pump price, insurance is a fixed bill, and depreciation happens whether or not you open the hood. The work that keeps a car, truck or mower running follows a schedule of intervals, and that schedule can be priced out before anything breaks.

The number most people compare against comes from AAA's annual Your Driving Costs study. In the 2025 edition, maintenance, repair and tires average 11.04 cents per mile for a new vehicle over five years and 75,000 miles, which is $1,656 a year at 15,000 miles. That figure bundles an extended warranty and one set of replacement tires, so it reads high for a careful owner of a paid-off sedan and low for someone keeping a European wagon alive past 120,000 miles.

The default inputs here describe a mid-size sedan serviced at an independent shop: 12,000 miles a year, an $89.95 oil change every 7,500 miles, $780 tires rated for 52,000 miles, $380 of brake work every 40,000 miles, a $420 scheduled service every 30,000 miles, and $300 a year set aside for repairs. The total is $945.92, or 7.9 cents a mile. Add a $600 a year service contract and the bill reaches $1,545.92, which is 12.9 cents a mile at 12,000 miles, close to the AAA average.

The service intervals that set the bill

Every line in the calculator is a quantity multiplied by a price, and the quantity comes from an interval. Price is what you negotiate at the counter. Interval is what the owner's manual sets, and it moves the annual cost more than most people expect.

Halving an interval doubles the yearly cost of that line, and the arithmetic is that blunt. An oil change every 3,750 miles instead of 7,500 turns 1.6 services into 3.2 and $143.92 into $287.84. Nothing about the price per quart changed, only how often the drain plug comes out.

Intervals shorten under severe service: trips under five miles, stop and go traffic, extreme heat or cold, towing, and dusty roads. Most manuals publish a second, shorter schedule for those conditions, and the fuel economy guide points out that a well maintained engine also holds its mileage, so the shorter schedule is not only about wear. NHTSA's tire page takes the same approach with a range: rotate every 5,000 to 8,000 miles, or sooner if the tread wears unevenly.

Worked example: 12,000 miles in one year

The table below prices one year at the defaults. Each line divides the annual mileage by the service life, then multiplies by the price.

Add the lines: 143.92 + 40.00 + 180.00 + 114.00 + 168.00 + 300.00 = 945.92. Divide by the miles driven and 945.92 / 12,000 = 0.079, which is 7.9 cents a mile. Divide by twelve and 945.92 / 12 = 78.83 for the monthly set-aside.

Look at what dominates. Tires plus the repair fund are 50.8 percent of the total, while the oil change that gets all the attention is 15.2 percent. A budget that tracks only oil changes is watching the smallest large line on the page.

Cost per mile at 6,000, 12,000 and 24,000 miles

The same prices produce sharply different rates depending on how far you drive. The repair fund is the reason. It is a flat $300 whether the car covers 6,000 miles or 24,000, so on a low mileage year it carries close to half the budget, and on a high mileage year it is less than a fifth.

The lines that scale with distance, oil, tires and brakes, hold a steady rate per mile. The lines that do not, repairs and any service contract, get thinner per mile as the odometer climbs. That is why a delivery driver can pay double the annual maintenance of a weekend driver and still run a cheaper car per mile.

Both numbers deserve a look. The annual total tells you what to put in the budget. The per mile figure tells you whether the car is worth keeping compared with a replacement, which is the subject of the next section.

Why the bill climbs as a car ages

New cars hide their costs inside a warranty. Once bumper to bumper coverage ends, usually at 3 years or 36,000 miles, the repair line stops being optional, and the shape of the bill changes with the age of the vehicle.

Years one to three are mostly consumables: oil, tires, wipers, one brake job. Years four to seven add battery, belts, coolant, transmission fluid, spark plugs, struts and a second set of tires. After year eight come the items that ruin a month: timing belt on an interference engine, water pump, alternator, starter, catalytic converter, and rust repair around wheel wells and rocker panels. A $300 repair fund is realistic under warranty and thin for a 10-year-old car. Many owners of older vehicles carry $800 to $1,200 a year instead, and the calculator has a box for that.

When a single repair quote arrives, there is a rule of thumb worth testing: if the repair costs more than half the car's market value, the money usually serves you better as a down payment. Run the quote through the repair box and look at what it does to the cost per mile. A $2,000 transmission job on a car worth $4,000 pushes a 12,000 mile year from 7.9 cents to 24.5 cents, and that is the number to compare against a replacement.

Two habits keep older cars cheap. Fix small faults before they cascade, since a $12 coolant hose protects a $600 head gasket. And keep records, because a documented service history is worth real money at resale and it tells the next shop what has already been replaced.

DIY, independent shop or dealer

Labor is the part of the bill you can change fastest, and the spread between options is wide. An oil change on a four cylinder engine takes about half an hour and roughly $35 in oil and filter. At the $89.95 default, the extra $54.95 buys a lift, disposal of the old oil, and someone else's afternoon. Doing 1.6 changes a year at home saves 1.6 × 54.95 = 87.92.

Dealers charge more per hour than independent shops in most markets, and the gap grows as cars age and dealer techs spend their time on warranty work. Independents are often the better value for brakes, suspension and fluid services. Either way, compare the out the door number, not the hourly rate, and ask whether the quote uses OEM parts, which cost more but fit like the originals.

What a quote should list: parts, labor hours, disposal or shop supply fee, and any tax. A brake quote of $380 per axle that becomes $455 with fees is a $455 quote. Enter the real number in the calculator, since a low headline price that hides fees will make your budget look better than it is.

Some jobs pay back faster than others for a home mechanic. Cabin and engine air filters, wipers, batteries, and bulbs are usually 15 minutes each with no special tools. Oil changes need a drain pan, a wrench and a place to take the used oil. Timing belts, struts and anything that requires lifting the engine are better left to a shop with a lift and insurance.

Turning the number into a monthly budget

A yearly bill of $945.92 works out to $78.83 a month. Setting that aside in a separate account turns a $780 tire purchase from an emergency into a planned expense, and it removes the temptation to skip a $420 service in a tight month. If your income is irregular, use the yearly figure instead and fund it in the months that run well.

This tool leaves out four costs on purpose, because each one has its own calculator: fuel, insurance, registration and depreciation. Together they dwarf maintenance. AAA's 2025 study puts total ownership at $11,577 a year for a new vehicle at 15,000 miles, which is 77.2 cents a mile, and maintenance is only 11.04 of those cents. For the other pieces, the fuel cost per mile calculator and the car insurance estimator cover the two biggest after depreciation.

The maths works for more than cars. A riding mower, a motorcycle, a boat trailer or a small fleet of work vans all follow the same pattern: parts that wear on an interval, a yearly repair allowance, and hours or miles that set the quantity. Swap the oil interval for an hour meter on a mower, and the same four lines of arithmetic give you a number you can budget against.