I estimated about $0.25/mile, which includes insurance, repairs, and depreciation. Gas is<$0.10/mile if you get better than 26mpg (assuming $2.60/gallon, which

I estimated about $0.25/mile, which includes insurance, repairs, and depreciation. Gas is<$0.10/mile if you get better than 26mpg (assuming $2.60/gallon, which is approximately the average). My estimates: - insurance - $100/6 months for a second car (from when I was debating selling my second car) - repairs - $400/year (I do most of the routine work myself) - depreciation - $1000/year - misc fees - $150 (registration, parking, occasional tickets, etc) My second car costs >$1500/year. I bought it used (~7 years old) for $10k, and I've had it for 5 years and it's currently worth ~$5k, so my depreciation estimate seems reasonable, perhaps conservative. If I drive 10k miles/year (I drive less), that's >$0.15/mile + $0.07/mile (~40mpg Prius), so $0.25/mile seems like a decent low end estimate. If you drive more, depreciation will be higher.