I think you have over simplified everything, there are endless reasons why people would lease vs purchase. For example, the way you treat your car the first five years will determine how it will treat you for the next 5. There are tradeoffs in every scenario and it comes back to your tolerance for risk. I believe the OP is trying to determine the financing costs for a Lease vs. Finance at 0%.I do agree the cost owning a new car is greater but at the same time, it is very difficult these days to find a good used car. Also, I forgot to mention the fact that with leasing a vehicle, a lot of people do it for business because the payments are written off whereas a purchased vehicle would fall under the depreciation area.