LoanMath

Extra payments on a $300,000 mortgage at 6%

Amortization computed month by month.

$53,346

saved by paying $100 extra a month on a $300,000 30-year mortgage at 6% (base payment $1,799)

Savings by extra payment

ExtraPaid off inInterest savedTime saved
+$50/mo27 yr 11 mo$29,2112 yr 1 mo
+$100/mo26 yr 1 mo$53,3463 yr 11 mo
+$200/mo23 yr 3 mo$91,1736 yr 9 mo
+$300/mo21 yr 0 mo$119,7019 yr 0 mo
+$500/mo17 yr 8 mo$160,29512 yr 4 mo
+$1,000/mo12 yr 10 mo$216,67317 yr 2 mo

Principal and interest only; baseline interest $347,515. Confirm your lender applies extra payments to principal.

FAQ

How much does $100 extra a month save on a $300,000 mortgage at 6%?

About $53,346 in interest, and the loan is paid off in 26 yr 1 mo instead of 30 years.

Is it better to invest instead?

Prepaying earns a guaranteed 6% return. Investing may earn more over long periods but with risk; many people first capture any 401(k) match and build an emergency fund.