ERD50
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
.. I recently saw an interesting article where the author backtested this for 10 year periods of time based on a view that the average mortgage life is less than 10 years. In 75% of the trials the investment results exceeded the mortgage interest. Since I plan to have my mortgage for a longer period, the probability of coming out ahead become higher than 75%, especially since I started during a period of low interest rates.
See The Retirement Cafe: Investing the Mortgage
I concede there is some risk, understand the risk and accept it. I'm in a position where if things start to go sideways I can always just write a check and pay of the mortgage which further increases my chance of gain/reduces my risk of loss.
Ahhh, data. How refreshing!
And, that does not even seem to account for the tax deductions at all (which are variable and often over-stated anyway - some people cannot fully deduct, and it must be compared to the standard deduction, not in total isolation).
I'd also love to see that model done for 20 and 30 year periods, probably a better time-frame for retirees consciously making this decision. And note that he shows the risk is lower when mortgage rates are below average levels.
-ERD50