The Rate Journey

Mortgage rates had a genuinely eventful 2025, even if the year-over-year headline number undersells how much it moved along the way. The average 30-year fixed rate started the year above 7%, according to Freddie Mac, drifted down to 6.85% by late February, kept easing to 6.62% by April, and continued grinding lower through the summer and fall. By late October, rates hit 6.19%, their lowest level in over a year, before settling around 6.22% in mid-December, comfortably below the 6.62% average for the year as a whole.

That's the kind of move that matters far more in practice than a single headline rate suggests, because it happened gradually enough that most of the year felt uncertain, and fast enough by the fourth quarter to change buyer behavior in a hurry.

Why the Move Down Mattered More Than It Looks

On paper, roughly 80 basis points of improvement from January's peak to October's low doesn't sound dramatic. In monthly payment terms, it's real money. On a $700,000 loan, a move from 7% to 6.2% reduces the monthly principal and interest payment by several hundred dollars, and lowers the income a buyer needs to qualify under standard debt-to-income guidelines by a meaningful margin. For buyers sitting right at the edge of qualifying, that's not a marginal improvement, it's the difference between qualifying for the home they want and not.

It also changes the refinance calculus for anyone who bought or last refinanced during the higher-rate years of 2023 and early 2024. Once the spread between a homeowner's existing rate and the prevailing market rate gets wide enough to justify the closing costs of a refinance, usually somewhere around a full percentage point for most borrowers, refinance activity tends to pick up quickly. The fall 2025 rate drop pushed a meaningful number of recent buyers into exactly that window.

Why Home Sales Stayed Historically Low Anyway

Here's the part that surprises people: despite meaningfully lower rates by the end of the year, total existing-home sales for 2025 came in at 4.06 million, essentially flat versus 2024 and tied for the lowest annual total since 1995. Lower rates alone didn't unlock a wave of transactions across the full calendar year.

The main culprit is what's become known as the lock-in effect. Millions of homeowners refinanced or bought during the era of 3% and 4% mortgage rates in 2020 and 2021. Selling that home and buying a new one at 6% or 7% means trading a historically cheap mortgage for a meaningfully more expensive one, even if the new home costs the same or less than the old one's current value. That math has kept a large share of would-be sellers on the sidelines for years now, which constrains inventory and, in turn, constrains how many transactions can actually happen regardless of where rates sit in any given month.

December's Breakout

The most interesting data point from the whole year came at the very end of it. Existing-home sales jumped to a seasonally adjusted annual rate of 4.35 million in December, the fastest pace in nearly three years and the highest monthly reading since February 2023. That's a meaningful signal, arriving right as rates had settled into the low 6% range for a couple of months, long enough for buyers who'd been waiting to decide the wait was over.

One month doesn't make a trend, and December sales partly reflect offers that were written weeks earlier when rates were already favorable. But it's a real data point suggesting that once rates stabilize in a more comfortable range for long enough, buyer demand that had been pent up for years can move relatively quickly.

What This Looked Like in San Diego Specifically

San Diego's version of this story tracked the national pattern with a local twist: San Diego actually saw median home prices soften somewhat over the course of 2025, a combination of elevated rates for much of the year, buyer fatigue after years of rapid appreciation, and a modest increase in inventory. That's a different dynamic than the pure lock-in story nationally, because San Diego's price softening gave buyers a second lever beyond just falling rates: slightly more negotiating room on price as well as better financing terms by year-end. Buyers who transacted in the fourth quarter of 2025 arguably got the best combination of the year, meaningfully lower rates than January, plus a market that hadn't fully snapped back to peak competitiveness.

Rate Buydowns and Other Tools Buyers Used in 2025

One quieter trend running underneath the headline rate numbers: builders and, in some cases, sellers leaned more heavily on rate buydowns throughout 2025 to bridge the affordability gap while broader rates stayed elevated for much of the year. A temporary buydown lowers a buyer's effective rate for the first one to three years of the loan, funded by a lump-sum contribution at closing, often from the builder or seller rather than the buyer. Permanent buydowns, where a buyer pays points upfront to lower the rate for the life of the loan, also became a more common negotiating tool, particularly in new-construction communities competing directly with a resale market that had more inventory to offer than it had a few years earlier.

For buyers, the lesson is that the headline 30-year average doesn't always reflect the effective rate available on a specific transaction. It's worth asking any builder or seller directly whether a rate incentive is on the table before assuming the market rate is the only rate available to you.

What Could Change This in 2026

A few variables are worth watching heading into the new year. Federal Reserve policy remains the biggest wildcard, since mortgage rates track longer-term bond yields more closely than the Fed's short-term rate directly, but Fed messaging still moves market expectations meaningfully. Inflation data, particularly shelter costs within it, will continue to influence how quickly, or whether, rates keep drifting lower. And the lock-in effect itself may start to soften on its own timeline, simply because enough time has passed since 2021 that some homeowners' life circumstances, a growing family, a job change, a divorce, force a move regardless of what happens to their mortgage rate.

Should You Try to Time the Rate Market?

The honest answer is that timing rates precisely is extremely difficult even for professional bond traders, let alone individual buyers. What 2025 demonstrated is less "here's exactly when to buy" and more "rates can move enough within a single year to meaningfully change what you can afford," which argues for staying informed and ready to act within a reasonable window rather than either rushing in at the first sign of a rate dip or waiting indefinitely for a rate that may not arrive.

A more productive approach for most buyers is to get pre-approved early, understand exactly how sensitive your budget is to rate movements of a quarter or half point, and treat a meaningful rate drop, whenever it happens, as a signal to move quickly rather than something to try to predict months in advance.

Practical Takeaways

  • A rate move of even half a percentage point is worth paying attention to. It has a real, calculable effect on what you can afford, not just an abstract one.
  • If you bought or refinanced in 2023 or early 2024, it's worth running the numbers on a refinance now that rates have eased, particularly if your existing rate is above 7%.
  • Don't assume low sales volume means a weak market. 2025's near-record-low transaction count was mostly a function of the lock-in effect keeping sellers off the market, not a lack of buyer demand.
  • Watch how rates behave into 2026. If the late-2025 trend toward the low 6% range holds or continues, it could be the beginning of a more durable unlock for both buyers and the sellers who've been waiting for a reason to list.