At today's rates (mine is 3.25%), a fixed mortgage payment is an excellent inflation hedge. Assuming inflation adds up at 3%/year, 20 years from now, everything has gone up 60%, while your mortgage has remained exactly the same. If you're investing the money you might otherwise have used to pay it off, even at a conservative 6% return, you are way ahead of the game. I don't intend to have mine paid off. In the worst case, my pension (which is COLA adjusted) will always be enough to cover the mortgage and more. In fact, my wife owns a house worth roughly $300k that her parents live in. After they're gone, I've considered using that money to pay off the mortgage, but I think the smarter play there again is to invest it and continue to pay the mortgage monthly.