09/04/2026
Two clients inherited $500K within a year of each other.
Client A paid off her mortgage immediately. 3.2% rate, gone. "One less bill" she said.
Client B kept his 3.1% mortgage and invested the full $500K.
Ten years later:
Client A: no mortgage payment, $0 in that inherited money (it's in her house).
Client B: still has the mortgage, and the $500K has grown to roughly $950K (7% average return, nothing exotic).
He's paid maybe $85K in mortgage interest over that decade.
Net difference: he's ahead by over $350K.
I'm not saying "never pay off your mortgage." I'm saying the peace-of-mind math and the actual math are two different conversations, and most people only have one of them.
Which one would you have made?