The average 30-year fixed mortgage rate fell 3 basis points to 6.33% on Sunday, May 31, 2026, giving homebuyers and refinance borrowers a small break in national pricing. The 15-year fixed rate held at 5.79% even as the 5/1 ARM jumped 24 basis points to 6.45%.
Those numbers come from Zillow lender marketplace data and reflect national averages rounded to the nearest hundredth. For anyone tracking borrowing costs, the change matters because the 30-year fixed mortgage remains the most common way to finance a home, spreading payments over 360 months and lowering the monthly bill compared with a shorter loan term.
On a $300,000 mortgage, a 30-year loan at 6.41% would carry a monthly principal and interest payment of about $1,878.48 and produce $376,254 in interest over the life of the loan. A 15-year mortgage at 5.80% would push the monthly payment to $2,499.27 but cut total interest to $149,869. Those examples show why even a small shift in the 30-year mortgage rate can change what borrowers can afford and how much they pay over time.
The mixed move also leaves a wrinkle in the market: the 30-year fixed rate eased, but the 5/1 ARM has been swinging sharply from day to day for weeks. That volatility makes adjustable-rate loans harder to read for borrowers weighing short-term savings against the risk that a new rate will reset later, especially since refinancing does not lock in today’s terms forever and can leave a borrower with a different rate when the loan is replaced.
For now, the clearest signal is that the 30-year mortgage rate is still hovering in the low 6% range, while other common loan products are moving in different directions. The next rate update will show whether Sunday’s dip was a pause or the start of a larger shift in mortgage pricing.
