Quote from gnome:
Not true. The "time value of money" of either paying the mortgage for the full term or paying extra to retire the mortgage earlier is exactly the same.
If you can earn more on your money than the mortgage rate, you should NOT pay the mortgage off early.... personal feelings of comfort aside.
There's a risk-reduction argument for paying it off. Few would advocate taking out a $200k loan to speculate on the markets. Trading whilst you have a mortgage is essentially the same thing. In some jurisdictions homes are protected from unsecured debt claims, which makes a debt-free home more secure than a mortgage plus an identical amount of cash in the bank. Don't forget that with a debt-free home, you can always tap it for funds at a later date, should that be necessary or desireable.