At least in the US, assuming you have the income stability to keep making your mortgage payments, and the discipline to invest excess dollars, the advice in this piece may grant you some peace of mind, but at significant financial cost. As I've written elsewhere, my net worth's purchasing power increased dramatically by not paying any of my three fixed-rate mortgages off a penny faster than required. The combination of the mortgage interest tax deduction and having interest rates significantly lower than inflation means that my real effective interest rate is negative!