Commuting costs more than gas. This calculator compares the El Paso Sun Metro
monthly pass (about $30) against the true cost of driving — fuel at local
prices, monthly parking near $50, and per-mile vehicle wear via the IRS
standard mileage rate — so you can see which option actually saves you money.
How it works
Driving cost is built from round-trip miles, then compared to the flat transit fare:
monthly miles = one-way miles × 2 × commute days
fuel cost = monthly miles / MPG × gas price
wear cost = monthly miles × IRS extra-per-mile (optional)
driving total = fuel cost + wear cost + parking
transit total = monthly pass price
savings = driving total − transit total
You can toggle the IRS standard mileage rate to switch between out-of-pocket fuel only and the full cost of ownership including maintenance and depreciation.
Example and tips
A 10-mile one-way commute, 22 days a month, in a 28-MPG car at $3.10 gas works
out to 440 miles and about $48.71 in fuel. Add $50 parking and the driving
total is $98.71 — versus $30 for the Sun Metro pass, a $68.71 monthly
saving by riding transit. Switch on the IRS rate and driving climbs past $300
all-in, widening the gap. If your employer subsidizes parking, lower that field
to see how it changes the trade-off.