What should you do with extra cash: prepay your mortgage each month, or invest it instead? This tries to take into account your tax situation and assumes you always itemize in order to give you a "real world" scenario. (Remember to talk to a tax professional!)
how much extra do have to spend each month? $
current monthly payment
(Principle & Interest Only)		 $
current interest rate %
current loan balance $
loan interest deductable?
expected long term investment return
expected long term tax rate
(state+federal)		 %
Investment Type