Total Cost Of Ownership Calculator

The sticker price is only about a third of what a car really costs. Enter the purchase price, ownership years, annual maintenance, insurance, fuel and other costs, expected resale value and yearly mileage: the tool totals depreciation plus every operating cost, and reports the headline numbers, monthly cost and cost per mile.

Quick Answer

Worked example, checked against this exact tool

A $30,000 car kept 5 years, with $800/year maintenance, $1,400/year insurance, $2,000/year fuel, $300/year other costs, $12,000 resale value and 13,500 miles/year: annual operating = $4,500, five-year operating = $22,500, depreciation = $18,000. Total cost of ownership = 30,000 + 22,500 − 12,000 = $40,500 ($675.00/month, $0.60/mile).

Depreciation is the biggest line item

Depreciation typically accounts for 35 to 50% of five-year TCO, yet buyers fixate on the sticker price. A rough rule: a new car loses about 20% in year one and 10 to 15% per year after, so most mass-market cars shed 50 to 60% of value in five years. Check used-price listings for your exact model to estimate the resale input honestly.

Cost per mile: the comparison number

Total cost divided by total miles is the fairest way to compare two cars: a cheaper car driven little can cost more per mile than a pricier car driven a lot. The IRS publishes an annual standard mileage rate, another widely used per-mile benchmark. AAA’s benchmark for a new midsize sedan is about $10,728 per year, roughly $0.79/mile at average mileage.

What to put in each bucket

Maintenance: servicing, tires, repairs. Insurance: your actual annual premium quote. Fuel: annual miles ÷ MPG × fuel price. Other: registration, tolls, parking. Leave financing out of these buckets; if you finance, add the loan’s total interest to the purchase price for a financed TCO. Two line items do most of the heavy lifting here: pin them down with our gas cost per month calculator and car insurance cost per month calculator, then feed the results back into this tool. Still deciding how to pay for the car? The Excel car payment calculator shows what your monthly payment looks like at different rates and terms before you sign.

Gas vs electric: a 5-year comparison

Run both side by side and the trade-offs become concrete. A $30,000 gas sedan kept 5 years ($800 maintenance, $1,400 insurance, $2,000 fuel, $300 other per year, $12,000 resale) totals $40,500, or $675.00/month and $0.60/mile. A $38,000 EV over the same 5 years ($400 maintenance, $1,700 insurance, $700 electricity, $300 other per year, $15,000 resale) totals $38,500, or $641.67/month and $0.57/mile. The EV’s higher purchase price, insurance, and depreciation are outweighed by much lower fuel and maintenance, but the result flips if electricity is expensive, insurance quotes run high, or resale values soften: enter your own numbers rather than trusting either example.

New vs used: where depreciation works for you

Buying a three-year-old car lets the first owner absorb the steepest depreciation, and the same five-year window can cost thousands less. Compare: buy at $19,000, keep five years, resell at $8,000, with operating costs of $5,200 per year ($1,500 maintenance, $1,200 insurance, $2,000 fuel, $500 other). Total cost of ownership = $19,000 + $26,000 − $8,000 = $37,000: $616.67 per month, $0.55 per mile at 13,500 miles per year. Against the new car’s $40,500, the used buyer saves $3,500 for the same five years of driving.

The break-even point moves with the discount: a one-year-old car at 80 percent of new price still carries most of the new-car depreciation curve, while at five years old the curve flattens and maintenance risk takes over. The sweet spot for most buyers is two to four years old: modern safety equipment, most of the steep depreciation behind it, and often some factory warranty remaining.

Three caveats: used-car loan rates run higher than new-car rates, the factory warranty is usually gone, so budget a pre-purchase inspection of roughly $150 to $200, and check the model’s reliability record, because repair risk that the warranty used to carry is now yours. The advantage is biggest on models that shed value fastest, typically luxury sedans, and smallest on models that hold value, like trucks.

The cost nobody enters: opportunity cost

Paying $30,000 cash for a car also costs the investment return that money would have earned. At 7 percent annual return over five years, $30,000 becomes $42,076.55: the forgone gain is about $12,076. Financing interest is the visible version of this cost, which is why the buckets section above says to add total loan interest to the purchase price; opportunity cost is the cash buyer’s version, and even the down payment carries one.

You do not need to add it to the tool’s total, but know the sticker understates the true cost by this amount whenever cash is involved. Depreciation captures what the market takes from the car’s value; opportunity cost captures what your capital could have done instead. A complete accounting includes both, and the comparison that matters, buy cash versus invest the difference, needs both numbers on the table. Leasing sidesteps the debate by converting depreciation and opportunity cost into a fixed monthly payment, but the lessee pays for the steepest depreciation years plus a profit margin: run the lease total through the same per-mile math before deciding it is cheaper.

What competing calculators miss

Rival tools lock you into a five-year frame and bury the assumptions. This tool takes any ownership period, breaks out depreciation vs operating costs explicitly, adds the per-mile figure competitors charge comparison-mode for, and tells you how to estimate the resale value that drives the whole result.

Frequently asked questions