This will not be the case at all on most single family homes. For example, the market rent for my house vs mortgage payment (if financed 100% and taxes + insurance escrowed) is around 40% higher. It will obviously be market dependent, but on an apples to apples comparison, you are obviously going to be paying more for rent. The landlord needs to make a profit, assumes a risk, pays higher interest rate, pays higher taxes + insurance, etc. There was actually a thread on this years ago where research was done. In almost all cases in regards to apples to apples, it was more expensive to rent. The exception would be multi-unit condos or other multi-unit buildings.