Those mileage rates are very, very generous though. As a car owner who tracks the expenses pretty closely, I can tell you, driving 10,000 miles a year does not cost anything like $5350, inclusive of car payments (or depreciation if you've paid it off), gas, maintenance, tolls, parking, registration, inevitable tickets, etc. It might be about right if you drive an $80k car that gets 15MPG, though.

Its a reasonable rate to reimburse employees for driving their own vehicles for work by (I'd estimate its about 95%ile of expenses), but a poor rate to estimate general car ownership costs by.

Tell us more!

What's the breakdown for your actual all-in commute costs on a per-mile basis, and how have you arrived at those numbers?