What this calculator does
This calculator compares the monthly cost of commuting in San Francisco by transit with the full cost of owning and driving a car — payment, insurance, gas, maintenance, parking and tolls. Muni buses, light rail and cable cars cover most of the city, and BART connects to the East Bay and airport with distance-based fares. Parking is scarce and expensive in many neighborhoods, and residential permits are limited to certain areas.
How to use it
- Keep the SFMTA (Muni) transit cost or change it to your actual fare spend.
- Enter your car payment, insurance and typical parking and tolls.
- Enter commute miles, driving days and other driving.
- Compare the totals and the per-mile cost.
The formula
Monthly car cost = payment + insurance + (monthly miles ÷ mpg × gas price) + (monthly miles × maintenance per mile) + parking + tolls. Monthly miles = daily round trip × days per week × 52 ÷ 12 + other miles. Transit cost = pass or fares + occasional rideshare.
Worked example for San Francisco
| Item | Per month |
|---|---|
| Car payment or lease | $550 |
| Insurance | $242 |
| Gas (733 mi at 28 mpg) | $127 |
| Maintenance and tires | $73 |
| Parking | $400 |
| Tolls | $40 |
| Car total | $1,432 |
| SFMTA (Muni) pass | $86 |
| Occasional rideshare / car share | $60 |
| Transit total | $146 |
Transit saves you about $1,286 / month.
What changes the answer in San Francisco
Housing is the dominant cost, but groceries, dining and services are also expensive. Many residents offset some of that by skipping car ownership. Parking is often the swing factor in dense neighborhoods, while in spread-out areas the lack of transit coverage can make a car necessary regardless of cost.
Common mistakes and tips
- Counting only gas as the cost of driving.
- Ignoring depreciation — even a paid-off car loses value every year.
- Forgetting pre-tax commuter benefits: many employers let you pay transit and parking with pre-tax dollars (up to the IRS monthly limit).
- Comparing without counting time; a longer transit trip can still be worth it if you can read or work.
Frequently asked questions
How much does a monthly transit pass cost in San Francisco?
This page uses about $86 for Muni adult fare / monthly pass. Fares change — confirm with SFMTA (Muni).
Is it cheaper to own a car in San Francisco or use transit?
With the default inputs, transit saves you about $1,286 / month. Parking, the car payment and insurance usually decide it.
What are pre-tax commuter benefits?
Under IRS rules, employers can let you pay transit passes and work parking from pre-tax pay up to a monthly limit, which lowers the effective cost by your tax rate.
What does a car really cost per mile?
Including fixed costs, often 70 cents to more than a dollar per mile for a financed car, far more than the gas alone.
Sources
Disclaimer
This calculator provides estimates for educational purposes only and is not financial, tax, legal, real estate, or insurance advice. Consult a licensed professional before making decisions.