US existing home supply reaches highest level since 2015 as market slowly rebalances

The US housing market just hit a milestone that buyers haven’t seen in over a decade. Existing-home supply climbed to 4.9 months in August 2026, according to the National Association of Realtors, marking the highest level since 2015.

The numbers behind the shift

Total inventory of existing homes reached 1.62 million as of August 2026. That’s a meaningful climb from July, when months’ supply sat at 4.6. Sales, meanwhile, moved in the opposite direction, falling 2.0% month-over-month to a seasonally adjusted annual rate of 3.98 million.

Median existing-home prices have still managed to grind higher, rising 1.6% year-to-date through August. Year-to-date sales have increased 1.6% compared to the same period a year earlier. Wage growth came in at 3.1% in August, which theoretically supports demand but clearly isn’t enough to overcome the gravitational pull of elevated mortgage rates.

How we got here

During the pandemic housing frenzy, months’ supply cratered to historic lows, sometimes dipping below 2 months. The inventory drought had multiple causes. Rock-bottom mortgage rates in 2020-2021 pulled demand forward dramatically. Then, when rates surged, millions of homeowners found themselves locked into mortgages at 3% or below, creating what the industry calls the “lock-in effect.”

Eighteen states have now exceeded their pre-pandemic levels of active listings. Nationally, though, inventory still sits about 7.7% below August 2019 levels.

What this means for the housing market

At 4.9 months, supply is still technically below the 5-6 month range that economists consider neutral territory. For prospective buyers, more inventory means more choices, less urgency, and more leverage in negotiations. A 1.6% year-to-date increase in median prices is a far cry from the double-digit appreciation that defined the pandemic era. The 18 states that have already surpassed pre-pandemic listing levels are likely the ones where price moderation will be most pronounced.

Mortgage rates remain the elephant in the room. High borrowing costs are the primary reason sales are stuck at 3.98 million annualized. Inventory is loosening the supply side, but rates are choking the demand side.

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