Paying a little extra on your mortgage each month can save you some serious money. Below is a sample payoff schedule on a $150,000 loan with an eight percent fixed rate for 30 years. Note: Paying less than 10 percent extra per month can save nearly half the price of the house! -No extra payment loan payoff: June 3, 2028Payment: $1,100.65/month interest cost: $246,232.88?-$50/month extra loan payoff: June 3, 2024Payment: $1,150.65/month you save: $44,150.28 ?-$100/month extra loan payoff: June 3, 2021Payment: $1,200.65/month you save: $72,953.22