Should I Pay Off My Mortgage Early in the US?

## The US mortgage interest deduction US homeowners who itemise deductions can deduct mortgage interest on up to $750,000 of mortgage debt. But only about 10% of filers itemise (the standard deduction is $15,000 for singles in 2025). If you take the standard deduction, your mortgage interest provides no tax benefit. ## The opportunity cost argument Historically, the S&P 500 returns ~10% annually. If your mortgage rate is 7% and your investment return is 10%, investing the extra money beats prepayment by 3 percentage points. But that 10% is not guaranteed year-to-year — mortgages need to be paid every month regardless of market performance.