I've heard that the option of a 10 year IO loan is possible, has anybody done this and would it be more beneficial for investing? Trying to think of any cons related to it other than the jump when it moves to P&I. But by then my income and rent would have increased enough to carry this easily. Also, another thought was the effect inflation would have on the mortgage. Assuming 3% inflation p.a., an $800k mortgage would be repayable with $590k of today's dollars... 'saving' $20k a year.