LoanMath

Extra payments on a $400,000 mortgage at 6%

Amortization computed month by month.

$55,759

saved by paying $100 extra a month on a $400,000 30-year mortgage at 6% (base payment $2,398)

Savings by extra payment

ExtraPaid off inInterest savedTime saved
+$50/mo28 yr 5 mo$29,9311 yr 7 mo
+$100/mo27 yr 0 mo$55,7593 yr 0 mo
+$200/mo24 yr 7 mo$98,2775 yr 5 mo
+$300/mo22 yr 8 mo$132,0277 yr 4 mo
+$500/mo19 yr 7 mo$182,63610 yr 5 mo
+$1,000/mo14 yr 11 mo$258,28415 yr 1 mo

Principal and interest only; baseline interest $463,353. Confirm your lender applies extra payments to principal.

FAQ

How much does $100 extra a month save on a $400,000 mortgage at 6%?

About $55,759 in interest, and the loan is paid off in 27 yr 0 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.