1. You'll lose out on that interest deduction
Paying all that mortgage interest has a benefit, and it comes in the form of a potentially sizable tax deduction. If you're in a high tax bracket, losing out on this deduction could mean paying more in taxes, especially if forgoing it pushes you into the next higher bracket. Let's say you're in the 25% tax bracket and currently pay $24,000 in mortgage interest per year. That's a $6,000 tax break you'd be giving up by paying off your mortgage.