Weird, I just bought a house and to be on the safe side I consulted with a real estate lawyer before signing the purchase agreement. I plan to rent it out for a couple of years before moving into it myself, and the lawyer offered me a copy of his standard rental lease agreement. The lease called for an automatic annual renewal with a 5% increase in rent, and I was shocked because in 30 years of renting I’ve never been hit with an increase anywhere near that (almost every renewal I’ve ever agreed to was at the same rent). It’s weird to think of increases even larger than that, such that a 5% cap would be beneficial.