You have to set emotions aside and analyze the numbers. My current mortgage interest is around 3%. I can buy treasury bills that yield 5%. That's a guaranteed 2% profit I can earn for borrowing money on my house. And that's t-bills. I get a lot more than that from my stock portfolio. Hmm, pay off my 40 year mortgage tomorrow, or leave the money in my etrade account where in 5 years there's enough money there to buy 5 houses outright. Which feels better?