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Paying extra on a mortgage. How much can I save? [duplicate]
Paying $12,000 in lump sumps annually will mean a difference of about $250 in interest vs. paying $1,000 monthly. If front-load the big payment, that saves ~$250 over paying monthly over the year. If you planned to save that money each month and pay it at the end, then it would cost you ~$250 more in mortgage interest. So that's how much money you would have to make with that saved money to offset the cost. Over the life of the loan the choice between the two equates to less than $5,000. If you pay monthly it's easy to calculate that an extra $1,000/month would reduce the loan to 17 years, 3 months. That would give you a savings of ~$400,000 at the cost of paying $207,000 extra during those 17 years. Many people would suggest that you invest the money instead because the annual growth rates of the stock market are well in excess of your 4.375% mortgage. What you decide is up to you and how conservative your investing strategy is.