Should we pay off our mortgage? We have cash accounts (savings, cds) of 550,000, another 500,000 in ira/roth/401(k) accounts (mostly in stock funds). I am 58 still working (95M per year), max out 401(k) each year, draw an Air Force retirement of 65M per year. I am about to inherit 600,000. Our mortgage is at 5.74%, balance 184,000, P and I of around 1,250 per month, house value around 250,000. Originally a 30 year loan, but with twice-monthly payments, it should be paid off in about 18 more years. No other debts. Should we pay the mortgage off? If so, where should we invest the money? Another option....should we refinance for 15 years and continue the twice-monthly payments?