Mortgage Calculator: Here’s How Much You Need To Buy a $430K Home at a 6.65% Rate

Mortgage rates continued to drift lower this week, with the average rate on 30-year fixed home loans dipping to 6.65% for the week ending August 20, down 2 basis points from 6.67% the previous week, according to Freddie Mac. While this second consecutive weekly drop provides a minor boost for home seekers, borrowing costs remain above their year-ago level of 6.58%.So what does this mean for homebuyers? Using the Realtor.com® mortgage calculator, we can look at how the math works out for the median-priced home in the U.S.All examples assume a 30-year fixed mortgage and include principal and interest only, excluding property taxes, homeowners insurance, and mortgage insurance.Monthly mortgage payment today with a 20% down paymentFor a homebuyer eyeing the median house price of $430,000, a 20% down payment results in a loan amount of $344,000. At today's 6.65% rate, the monthly principal and interest payment is approximately $2,208. This reflects a $5 monthly reduction from the previous week’s payment of $2,213. However, compared to the 6.58% average from August 2025, which required a $2,192 monthly payment for a home at this price, today’s buyers are paying $16 more every single mont...