If you were hoping for a friendlier mortgage market heading into spring, the latest numbers won’t make you feel better. The average 30-year fixed mortgage rate climbed to 6.46% this week — up from 6.38% last week and the highest it’s been in nearly seven months. It marks the fifth consecutive week of increases, arriving at exactly the wrong time for buyers gearing up for the traditionally busy spring homebuying season.

How Fast Rates Have Reversed Course

The speed of this reversal is striking. Just five weeks ago, the 30-year average dipped below 6% for the first time since late 2022 — a brief moment of relief that gave many buyers hope. That window closed fast. Rates have been climbing steadily since, driven largely by surging oil prices tied to the ongoing war with Iran, which has reignited inflation fears across financial markets.

The last time rates were this high was September 4, when the 30-year average sat at 6.5%. One year ago, the rate was 6.64% — so while today’s number is still technically lower than a year ago, the direction of travel is what’s spooking both buyers and the broader housing market.

The 15-year fixed-rate mortgage — a popular choice for homeowners refinancing — also ticked up, moving from 5.75% to 5.77% this week. A year ago it averaged 5.82%, according to Freddie Mac.

Why Are Rates Rising — and What Does Iran Have to Do With It?

Mortgage rates don’t move in isolation. They closely track the 10-year Treasury yield, which lenders use as a benchmark for pricing home loans. That yield was sitting at just 3.97% in late February — before the US-Israel strikes on Iran sent oil prices surging. By Thursday it had climbed to 4.3%, down slightly from 4.42% the week before but still dramatically higher than where it started the year.

The logic runs like this: higher oil prices raise expectations for inflation. Rising inflation expectations push Treasury yields higher. Higher yields push mortgage rates up. And the Federal Reserve — already cautious about cutting interest rates — becomes even less likely to ease when inflation is threatening to accelerate again. It’s a chain reaction, and right now every link in it is pulling rates in the wrong direction for borrowers.

What Higher Rates Actually Mean for Your Monthly Payment

Every uptick in mortgage rates translates directly into higher monthly costs for home buyers. Even a fraction of a percentage point can add hundreds of dollars per month on a typical home loan, narrowing what buyers can realistically afford and pushing more people to the sidelines. At 6.46%, many buyers who were on the edge of qualifying for a home just a few weeks ago are now in a tighter spot.

The practical impact is already showing up in the data. Mortgage applications fell 10.4% last week compared to the week before, according to the Mortgage Bankers Association, with much of the drop coming from fewer refinancing applications as the incentive to refinance diminishes with every rate increase.

“Looking ahead, stability in the mortgage rate environment will be key to bringing buyers back into the market.”

— Bob Broeksmit, CEO, Mortgage Bankers Association

A Housing Market That Has Been Struggling for Years

This latest rate surge lands on an already fragile housing market. US home sales have been in a slump since 2022, when mortgage rates first began rising sharply off their pandemic-era lows. Sales of previously occupied homes were essentially flat last year, stuck near a 30-year low. January and February of this year both came in below the same months in 2024.

Spring is typically the period when the housing market picks up the most momentum — families making moves before the school year, longer days, more listings. But with rates now back above 6.4% and climbing, that seasonal boost is under real threat. More sellers staying put means less inventory. Less inventory means stubbornly high prices. And high prices combined with high rates is a punishing combination for anyone trying to buy their first home right now.

What Would It Take to Turn This Around?

The honest answer is: it depends heavily on what happens next with inflation and the geopolitical situation. If oil prices stabilise or fall — perhaps through a ceasefire or diplomatic progress on the Iran conflict — that could relieve pressure on Treasury yields and give mortgage rates room to ease. A shift in Federal Reserve messaging toward rate cuts would also help.

But until there’s a clearer signal that inflation is coming back under control, the rate environment is likely to stay elevated and volatile. For buyers who’ve been waiting on the sidelines, the calculus isn’t getting easier — and the spring season they were hoping to jump into is starting to look a lot more complicated than they’d planned.