I’ll go ahead and say this at the outset: there is no perfect, magic formula for how many rental properties you need in order to retire, just like there’s no perfect, magic formula for how large your stock portfolio needs to be in order to retire.
Yes, there’s the popular 4% rule, but in no way is that a guarantee either. There are just too many factors to consider. At the end of the day, all you can do is make a well-educated guess, use real current numbers, and look at both history and statistics.
Answering the question – How many rental properties do you need to retire? – here’s how I go about it: 1. Figure out how much you need in retirement to cover your monthly expenses and enjoy life a little.