Mortgage Calculator: What It Takes To Buy a $430K Home at a 6.43% Rate

Mortgage rates dropped substantially on Thursday, as falling oil prices and the tentative U.S.-Iran peace deal pushed long-term borrowing rates lower.

The average rate on 30-year fixed home loans fell to 6.43% for the week ending July 2, down 6 basis points from 6.49% the previous week, according to Freddie Mac. For perspective, rates averaged 6.67% 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 country.

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 current median price of $429,500, a 20% down payment results in a loan amount of $343,600.

At today’s 6.43% rate, the monthly principal and interest payment is approximately $2,156. This reflects a $14 monthly reduction from the previous week’s payment of $2,170.

Compared to the 6.67% average from July 2025, which would have required a $2,210 monthly payment for a home at this price, today’s buyers are saving $54 every single month.

Monthly mortgage payment today with a 3.5% down payment

The savings are also significant for those using FHA loans with a 3.5% down payment.

On a $429,500 home, an FHA borrower would finance roughly $414,468. At today’s 6.43% rate, the monthly principal and interest payment comes to approximately $2,601.

This reflects a $16 decrease from last week’s monthly cost of $2,617. When viewed against the 6.67% rates of July 2025, where the monthly payment for this loan amount sat at $2,666, today’s FHA borrowers are keeping an extra $65 in their pockets every month.

Looking at the October 2023 peak of 7.79%, when the payment for a home at this price reached $2,981, the monthly savings are a more substantial $380.

Long-term savings over 30 years

The long-term financial benefits of today’s rates compared to historical highs remain clear when looking at the total cost of the loan over 30 years.

A buyer with a 20% down payment at today’s 6.43% rate will pay a total of $776,157 in principal and interest over the life of the mortgage.

While the purchase price keeps the overall baseline elevated, this total remains a distinct contrast to the October 2023 peak of 7.79%, when the total cost for that same $343,600 loan would have reached $889,595. By securing a mortgage at today’s rate instead of that peak, a homebuyer effectively avoids $113,438 in interest charges over the 30-year term.

FHA borrowers see a similar trajectory of long-term savings. Financing the current median-priced home at today’s 6.43% rate results in a lifetime payment of $936,240 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 $1,073,074. This represents a total long-term savings of $136,834 for FHA buyers. While the market continues to react to shifting global events, this week’s substantial downward drift provides a helpful financial advantage for buyers looking to lock in a mortgage this season.