Estimated yearly upkeep — from your car’s age and annual mileage.
Beyond the payment and the fuel, every car has a third cost that owners chronically underestimate: maintenance. Our free Car Maintenance Cost Calculator estimates your annual maintenance cost — and the cost per mile — from two inputs: the car’s age in years and your annual mileage, using a per-mile cost table that rises as cars get older.
The defaults — a 5-year-old car driven 12,000 miles a year — estimate about $1,212 a year, or $101 a month. That is not a repair bill; it is the annualized average of oil changes, tires, brakes, fluids, filters, and the occasional bigger job, spread across the year the way a budget needs it.
This is a planning estimate, not a prediction. Individual cars vary enormously by make, model, and history. Use it to budget, to compare a new car against a used one, and to sanity-check whether that “cheap” old car is actually cheap.
Cars do not wear out linearly — they follow a wear curve. Years 1-3 are the honeymoon: mostly oil changes and filters, often under warranty, roughly $0.06-$0.08 per mile. Years 4-6 bring the first real cycle: tires, brakes, battery, around $0.09-$0.11 per mile. Years 7-10 are the expensive middle age — suspension, alternators, water pumps, $0.13-$0.16 per mile. Past year 10, rubber, plastic, and electronics all age at once, and per-mile costs climb steeply.
The calculator encodes this curve as a per-mile maintenance rate by age: about $0.061/mi in year 1, rising through $0.101/mi at year 5, to roughly $0.162/mi at year 8 and beyond. Multiply by annual miles and you get the yearly budget. These figures blend scheduled maintenance (oil, filters, fluids, tires, brakes) with the annualized probability of unscheduled repairs — the alternator that fails in year 7 is “paid for” a little bit in every year’s budget.
Mileage matters independently of age because most wear is per-mile, not per-year: brakes, tires, and fluids are consumed by distance. But age matters independently of mileage too, because rubber dries, fluids degrade, and electronics fail with time even on garaged cars. The table uses age as the primary key because age predicts the kind of failures, while mileage scales the quantity of wear. Key terms:The table blends scheduled service costs with annualized repair probabilities across the mainstream market. Luxury brands, performance cars, and known-troublesome models run higher — treat the table as the middle of the bell curve.
Car age 5 years, 12,000 miles per year.
The owner who budgets $101 a month never faces a “surprise” $600 tire bill — the surprise was pre-funded. That is the entire philosophy: maintenance is not unexpected, it is just lumpy, and averaging tames the lumpiness.
Same 12,000 miles/year; compare a 2-year-old car with a 9-year-old car.
Now the used-car bargain gets honest: the 9-year-old car listed $6,000 cheaper than the 2-year-old one is only ~$360 cheaper over five years after maintenance — before counting its higher breakdown risk and older safety tech. The widget turns “cheap old car” from a feeling into a number.
A sales rep drives 24,000 miles a year in a 6-year-old sedan. Rate: $0.117/mi × 24,000 = $2,808/year, or $234/month. Her fuel at 30 MPG and $3.50 is $2,800/year — maintenance nearly equals fuel, a fact that shocks most high-mileage drivers. She was budgeting $100 a month for upkeep and wondering why the credit card kept growing; the widget shows the true number is $234. She adjusts the budget and the mystery ends.
Second scenario: the garage queen. A weekend sports car: age 8, but only 4,000 miles a year. Rate $0.162 × 4,000 = $648/year. Low miles, but the age rate still bites — dry-rotted tires, aged fluids, and a dead battery do not care about the odometer. The owner learns that time-based maintenance (tires every 6 years regardless of tread, fluids by the calendar) dominates at low mileage, and budgets $54/month.
Third scenario: the fleet buyer. A contractor compares keeping 7-year-old vans ($0.137 × 20,000 = $2,740/year each) versus replacing with new ($0.061 × 20,000 = $1,220/year each). The $1,520-per-van annual maintenance saving across 12 vans is $18,240 — a serious input to the replace-versus-repair decision, weighed against depreciation on the new vans.
Fourth scenario: the warranty question. An extended warranty costs $2,400 for 3 years ($800/year) on a 5-year-old car the widget prices at $1,212/year in total maintenance. But warranties cover only repairs, not scheduled maintenance (roughly half the $1,212) — so the real comparison is $800/year of warranty versus ~$600/year of expected covered repairs, plus exclusions and deductibles. The widget’s number frames the warranty pitch honestly.
One pattern worth internalizing: maintenance is a subscription you forgot you signed. About $100 a month for a mid-age car, every month, forever — treat it as a bill and it stops being a crisis. Owners who “can’t afford” the $101 monthly budget invariably pay more in deferred-repair compounding later.
A brief history of the service interval: the 3,000-mile oil change — still quoted by quick-lube shops — is a fossil from the era of carburetors and non-detergent oil. Modern synthetics and engine management stretched intervals to 7,500-10,000 miles, and onboard oil-life monitors now compute them from actual driving conditions. Each stretch of the interval lowered the early-year rates in tables like this one. What has not changed: tires, brakes, and rubber age on physics’ schedule, not marketing’s — which is why the curve still climbs with age no matter how good the oil gets.
Worked scenario — the 100,000-mile service: a car hits 100k at age 8: timing belt ($900), water pump ($400, done together), full fluid services ($350), tires ($650), brakes ($450). Total: $2,750 in one year — versus the widget’s $0.162 × 12,000 = $1,944 annualized estimate. The owner panics at the bill, but the widget’s philosophy holds: $1,944 × 8 years = $15,552 of lifetime budgeting versus actual lifetime spend in the same ballpark. Single-year spikes are noise; the multi-year average is the signal. She pays the $2,750 from the maintenance fund she built with the widget’s monthly number.
Edge cases and pro tips: luxury and performance brands run 1.5-2x the table — a year-5 BMW is not a year-5 Camry. Diesel trucks add fuel-filter and emissions-system costs. Salt-belt cars add rust-related repairs the table averages in. Pro tip: find your model’s forums and read the “common problems by mileage” threads — they predict your curve better than any national average. And do the 30-second monthly checks (tire pressure, fluids, lights, belts) yourself; catching a slow coolant leak early is a $20 hose instead of a $4,000 engine. Finally, keep every receipt: at resale, a documented history is worth real money.
When a maintenance estimator is the wrong tool: if you need to diagnose a specific symptom (noise, leak, warning light), no estimator replaces a mechanic’s inspection — this page budgets, it does not diagnose. If the question is whether to repair or replace the car, you need the full comparison: repair quote versus replacement cost including depreciation, which this widget only half-answers. And for electrics, find an EV-specific maintenance curve — the wear items are different enough that gasoline tables mislead.
Maintenance estimate: annual = per-mile rate by age x annual miles. Rates: yr1 $0.061, yr2 $0.068, yr3 $0.077, yr4 $0.088, yr5 $0.101, yr6 $0.117, yr7 $0.137, yr8+ $0.162. Example: 5-yr-old car, 12,000 mi = $1,212/yr ($101/mo). PLANNING ESTIMATE, varies by make/model. Source: Sigma Calculator, Car Maintenance Cost Calculator, https://sigmacalculator.net/automotive-calculators/car-maintenance-cost-calculator/
Cite this page as: Car Maintenance Cost Calculator, Sigma Calculator, https://sigmacalculator.net/automotive-calculators/car-maintenance-cost-calculator/
Last updated: October 12, 2026