Seattle Commute Cost Calculator

Commuting in Seattle is expensive in ways that are easy to underestimate — downtown parking alone can run $225–$400 per month, and that is before fuel and vehicle wear. This free calculator compares the true monthly cost of driving against an ORCA transit pass (~$99/month) so you can see which option actually saves money for your specific commute.

Why driving usually costs more than people think

Most commuters estimate their driving cost based on fuel alone: miles driven, divided by MPG, times the gas price. But fuel is typically only about a third to half of the true marginal cost of a commute by car. The additional components are:

• Vehicle wear: tires, brakes, oil, and incremental depreciation accrue with every mile driven. The IRS estimates the maintenance-and-depreciation component of the standard mileage rate at roughly $0.20–0.25 per mile. This tool uses $0.21/mile as a default.
• Parking: the single largest variable. Downtown Seattle garage monthly passes run roughly $225–$400 depending on the block; daily rates in the core are $30–$45. A commuter parking daily rather than buying a monthly pass quickly exceeds the ORCA pass cost on fuel alone.
• Traffic time: not priced here, but worth noting — Seattle consistently ranks among the worst US cities for commute time, and sitting in traffic burns fuel at effectively zero miles per gallon.

The cost model, line by line

The tool computes monthly miles from your round-trip distance and commute days, then totals fuel, wear, and parking:

monthlyMiles = roundTripMiles * commuteDays
fuelCost     = (monthlyMiles / mpg) * gasPrice
wearCost     = monthlyMiles * perMileWear     (default 0.21)
drivingTotal = fuelCost + wearCost + parking

Transit cost is simply your ORCA pass price. The tool reports the cheaper option and the monthly and annual difference.

ORCA transit in Seattle

ORCA (One Regional Card for All) is the unified transit card for Seattle-area buses, Link Light Rail, the Sounder commuter rail, and Washington State Ferries. A monthly regional pass typically runs around $99 for most fare zones, though the exact price depends on your specific routes and any employer subsidy.

King County Metro, Sound Transit, and Seattle Streetcar all accept ORCA. For commutes from neighborhoods like Capitol Hill, Fremont, the University District, or Beacon Hill to downtown, transit is often faster than driving during peak hours due to dedicated bus lanes and light rail speed.

Worked example

A 16-mile round trip, 20 commute days a month, in a 28-MPG car, gas at $4.50/gal, downtown parking $275/month:

Car payments and insurance are excluded because they are largely fixed costs that continue regardless of whether you drive to work. This calculation compares only the marginal cost of commuting. Everything runs locally — nothing is uploaded.

Two Seattle-specific levers worth checking before you decide

Employer transit subsidies are unusually common in Seattle. Washington’s Commute Trip Reduction law requires larger employers in congested areas to run programs that reduce drive-alone commuting, and many Seattle employers respond by subsidising or fully covering ORCA passes. Separately, U.S. tax law lets employers offer transit benefits pre-tax up to a monthly IRS limit. Before comparing raw prices, ask what your employer offers — a subsidised or pre-tax pass can cut the transit side of this comparison by 30–100%.

Parking price varies more than any other input. The gap between a neighborhood park-and-ride (often free), a $15/day lot a short walk from the office, and a $400/month core garage is the difference between driving winning and losing this comparison outright. If you drive, price at least two parking options before settling; if your employer provides free parking, set the parking field to zero and note that transit will rarely win on pure cost — though it may still win on time and predictability when Link bypasses I-5 congestion.

Keeping the inputs honest

Every default in this calculator moves over time: gas prices swing seasonally, ORCA fares are set by the regional agencies, and the per-mile wear figure tracks the vehicle-cost data underlying the IRS standard mileage rates, which are updated annually. Current ORCA pass pricing and fare products are published at myORCA. Treat the defaults as sensible starting points, replace them with your actual numbers, and re-run the comparison when fuel prices or fares change — the method stays valid even as every price in it moves.

And remember the comparison is rarely all-or-nothing: many Seattle commuters drive to a Link park-and-ride and ride the train downtown, paying transit fare plus a few dollars of driving cost while skipping the parking line item entirely — model that hybrid by shortening the driving distance and zeroing parking, then adding the pass price.