Commute Cost Calculator

What a commute actually costs

Most people price their commute at the pump. That number feels honest — it is money leaving your account on a Tuesday morning — but it is the smallest slice of the bill. Driving to work wears out a car, and the cost of that wear shows up years later as depreciation on the trade-in, an extra set of tyres, brake work, a shorter gap between services and a higher insurance band for the mileage you declare. The IRS publishes one number that rolls all of it together: 70 cents per mile for 2025. That is the rate this calculator uses by default, and switching between it and the gas-only method is the fastest way to see how much of your commute is invisible.

Worked example: 18 miles each way, four days a week

Start with distance. Eighteen miles one way is 36 miles a day, and four office days makes 144 miles a week. Now cost the driving two ways:

• IRS all-in: 144 × $0.70 = 00.80 a week.
• Gas only at 28 mpg and $3.60 a gallon: 144 ÷ 28 = 5.14 gallons, × $3.60 = 8.51 a week.

Add parking at 2 a day — $48 a week — and the two methods land at 48.80 and $66.51 a week. Over a year that is $7,738 against $3,459, a gap of roughly $4,280. Nothing was double counted; the difference is depreciation, insurance, maintenance and tyres, all of which you are paying whether or not you notice. Fuel is under a fifth of the true per-mile cost at these prices, which is why gas-only maths makes long commutes look cheap.

The per-round-trip card puts the same figure at human scale: $37.20 each time you drive in. That is the number to hold next to a lunch out, a parking upgrade, or the price of the train.

Why the monthly figure uses 4.33 weeks

A month is not four weeks. Fifty-two weeks divided by twelve is 4.333, so budgeting at "four weeks" quietly deletes a month of commuting every year. On the example above, four weeks would show $595 a month instead of $644.80 — a $600 annual error, which is most of a set of tyres.

The remote-day argument, in numbers

The strongest use of this tool is not budgeting; it is negotiation. Run the same commute at five days a week and it costs 86 a week, or $9,672 a year. Drop to four and it falls to $7,738. One remote day is worth about ,934 a year — and that is take-home money, so a salaried worker in the 24% bracket would need roughly $2,500 of extra gross pay to match it.

The time side is just as concrete. At 40 minutes each way, four days a week, the tool shows about 277 hours a year in the car: seven working weeks of unpaid time. Removing one day gives back around 69 hours. Managers respond better to "this is 69 hours and ,900 a year to me, and it costs the company nothing" than to a vague preference, and the yearly framing is what makes a $37 daily figure sound like a real sum.

Should you move closer? A quick break-even

Suppose the same worker considers a flat four miles from the office. Weekly driving drops to 32 miles, or $22.40, and parking stays at $48, giving $70.40 a week and about $305 a month. The saving is roughly $340 a month, so any rent increase under that figure pays for itself in cash alone — before counting the 194 hours a year handed back. Above it, you are buying time rather than saving money, which is a legitimate choice as long as you know which one you are doing.

Transit, pre-tax dollars and the honest limits

Enter a monthly pass and the tool compares it with the all-in driving cost, not just the fuel. Against $644.80 a month, a 30 pass looks like $515 a month cheaper — but a fair comparison also weighs the extra door-to-door time and the days you genuinely need the car. If your employer offers a commuter benefit under IRS section 132(f), transit and qualified parking can be paid with pre-tax income up to $325 a month in 2025, which knocks your marginal tax rate off the true cost. Driving itself is never deductible for an employee.

Three limits worth stating. Parking is entered as a daily rate; if you pay for a monthly garage space, divide by the days you actually use it or the figure will run high. The mpg and price-per-gallon inputs are US units, so drivers working in litres and kilometres should switch to the custom rate per mile after converting their own numbers. And the IRS rate is an average across a fleet of ordinary cars — a paid-off ten-year-old hatchback costs less per mile, a new SUV or a leased vehicle costs more, and an EV shifts the balance further toward depreciation and away from fuel. Use the custom method if you know your own cost per mile; the point of the default is to stop the estimate at zero being wrong by a factor of four.