Mortgage Calculator: Here’s How Much You Need To Buy a $430K Home at a 6.71% Rate, the Highest of the Year

Mortgage rates surged to their highest level in more than a year this week after the global bond market was roiled by a large-scale sell-off fueled by renewed inflation fears related to a fresh round of hostilities in the Middle East.

The average rate on 30-year fixed home loans increased to 6.71% for the week ending Sept. 3, up 5 basis points from 6.66% the previous week and the highest since late July 2025, according to Freddie Mac.

For perspective, rates averaged 6.50% during the same period in 2025.

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 payment

For 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 6.71% rate, the monthly principal and interest payment is approximately $2,222. This reflects an $11 monthly increase from the previous week’s payment of $2,211.

Compared to the 6.50% average from September 2025, which required a $2,174 monthly payment for a home at this price, today’s buyers are paying $48 more every single month.

Monthly mortgage payment today with a 3.5% down payment

The monthly costs have also climbed for those utilizing FHA loans with a 3.5% down payment. On a $430,000 home, an FHA borrower would finance roughly $414,950.

At today’s 6.71% rate, the monthly principal and interest payment comes to approximately $2,680. This reflects a $13 increase from last week's monthly cost of $2,667.

Compared to the 6.50% rates of September 2025, where the monthly payment for this loan amount sat at $2,623, today’s FHA borrowers are paying an extra $57 in interest every month.

However, looking back at the October 2023 peak of 7.79%, where the payment for a home at this price reached $2,984, today's monthly payment still offers $304 in relief.

Long-term savings over 30 years

The long-term financial picture highlights how these borrowing costs accumulate over time.

A buyer with a 20% down payment at today’s 6.71% rate will pay a total of $799,934 in principal and interest over the life of the mortgage. While recent rate surges have pushed overall borrowing costs higher, this sum still represents a distinct contrast to the October 2023 peak of 7.79%, when the total cost for that same $344,000 loan would have reached $890,630.

By securing a mortgage at today’s rate instead of that peak, a homebuyer effectively avoids $90,696 in interest charges over the 30-year term.

FHA borrowers see a similar trajectory of long-term figures. Financing the current median-priced home at today's 6.71% rate results in a lifetime payment of $964,920 for principal and interest. If that same loan had been locked in at the 7.79% peak in late 2023, the total cost would have climbed to $1,074,323. This represents a total long-term savings of $109,403 for FHA buyers.

While the sharp rise above 2025 baselines adds pressure to fall homebuyer budgets, current rates continue to maintain a discount compared to the historical highs of late 2023.