mortgage rates are climbing again, pushing this weekend’s national averages to their highest level since the end of September. As of March 29, 2026 (ET), Zillow’s lender marketplace is reporting an average 30-year fixed rate of 6. 47% and a 15-year rate of 5. 90%. The move matters immediately for buyers and homeowners weighing whether to lock a rate, refinance, or adjust budgets as borrowing costs rise.
What the latest Mortgage rate snapshot shows
Today’s headline number is the 30-year fixed mortgage average at 6. 47%, based on the latest Zillow data cited in the rate roundup dated March 29, 2026 (ET). The same data set lists the 15-year fixed average at 5. 90%.
The update also notes that rates are at their highest level since the end of September, signaling a broader upward trend rather than a one-day blip. The figures are described as national averages and rounded to the nearest hundredth, meaning individual borrowers may see different offers depending on lender and borrower qualifications.
What higher rates mean for monthly payments and total interest
The difference between common loan terms is showing up sharply in both monthly payments and lifetime interest costs. Using the example provided in the rate briefing: a $300, 000 loan at 6. 47% on a 30-year term comes with an estimated monthly principal-and-interest payment of about $1, 890, and total interest over the life of the loan of $380, 504—on top of the original $300, 000.
For the same $300, 000 loan on a 15-year term at 5. 90%, the estimated monthly payment rises to $2, 515, while total interest paid drops to $152, 770 over the life of the loan.
The trade-off is clear in the numbers provided: the shorter term carries a higher monthly burden but dramatically reduces the cumulative interest expense.
Immediate reactions from the institutions publishing the numbers
Zillow, through its lender marketplace rate averages referenced in the March 29, 2026 (ET) briefing, is effectively signaling a renewed tightening in borrowing conditions with the 30-year fixed average at 6. 47% and the 15-year at 5. 90%.
The same briefing emphasizes that a 30-year term remains the most popular type of loan because spreading payments across 360 months typically lowers the monthly payment compared with shorter-term options.
Quick context: fixed-rate stability vs refinance resets
The rate summary reiterates a core distinction: with a fixed-rate mortgage, the interest rate is locked in for the entire life of the loan. It also notes that borrowers receive a new rate if they refinance.
What’s next for borrowers watching rates
In the days ahead, borrowers will be tracking whether the national averages remain elevated after reaching their highest level since late September. For now, March 29, 2026 (ET) leaves a clear message in the published snapshot: a mortgage at 6. 47% on a 30-year term and 5. 90% on a 15-year term changes affordability calculations quickly, especially for anyone deciding between lower monthly payments and lower lifetime interest.
