KB Home told investors on September 22 that its backlog had grown year over year for the first time in four years. The homebuilder ended its fiscal third quarter on August 31 with 4,398 homes sold but not yet delivered, up 2 percent from a year earlier and worth $2.05 billion. The same release reported net orders down 12 percent, deliveries down 19 percent, and monthly sales per community down from 3.8 to 3.1. Demand fell and the backlog rose. Both numbers are correct, and the arithmetic that connects them is the most useful thing in the report.
The Drain
A backlog is a bathtub. Orders pour in, deliveries drain out, and the level is whatever remains. KB Home began the quarter with 4,526 homes in backlog, took 2,604 net orders and delivered 2,732. Add the first two, subtract the third, and you get 4,398 exactly.
The level rose because the drain narrowed. KB Home delivered 60 percent of its opening backlog during the quarter, down from 71 percent a year earlier. Bill Hollinger, the chief accounting officer, gave the cause on the earnings call: "The lower conversion rate reflected our focus on increasing the mix of built-to-order homes delivered." Two sentences later he tied it to the headline. "As a result, we also generated our first year-over-year increase in our backlog in four years."
Run the quarter again at last year's 71 percent. Deliveries come to about 3,210 homes and the backlog ends near 3,920, roughly 10 percent below a year earlier. The same buyers, signing the same contracts, would have produced a headline about a shrinking backlog.
The Wait
Built to order is KB Home's core model, and the company spent this year returning to it. Built-to-order homes made up 74 percent of third-quarter deliveries, up from 60 percent in the second quarter. A buyer of a finished spec home can close as soon as the loan is ready. A buyer who picks a floor plan and finishes waits for the foundation to be poured and then for construction, which averaged 99 days in the quarter. KB Home had roughly 1,100 homes sold but not yet started. Each one sits in the backlog for a full build cycle before it can leave.
The model has real advantages, and management listed them. Unsold homes are 26 percent of production, down from 41 percent a year ago, and finished unsold homes are 9 percent, down from 16 percent. Chief executive Rob McGibney said its homes "do not require heavy incentives to sell." Its housing gross margin of 16.5 percent topped the 15.8 percent Lennar reported on September 16 for the same three months, a quarter in which Lennar's average price reflected about 12 percent in incentives.
Lennar shows the other design. It runs an even-flow model, starting homes at a steady pace and selling them as they go up, so its tub barely holds water. Lennar ended its quarter with 16,857 homes in backlog after delivering 20,840, so its backlog is smaller than one quarter of deliveries. KB Home's backlog equals 1.6 quarters of its deliveries. Lennar pays for affordability up front, in incentives. KB Home pays in time.
Where the Water Sits
The backlog gain also sits in one region. West Coast backlog rose to 1,589 homes from 1,294, up 23 percent. The Southwest, Central and Southeast regions together held 2,809 homes, down from 3,039, a decline of about 8 percent. West Coast net orders rose 8 percent while Central orders fell 26 percent and Southeast orders fell 23 percent.
The strongest region also holds the submarket where the fourth-quarter outlook broke. KB Home lowered its implied fourth-quarter average selling price to about $480,000 from roughly $500,000. McGibney attributed the change "principally" to Southern California, where "slower sales in the third quarter relative to our expectations have reduced the number of higher-priced Southern California homes we expect to close in the fourth quarter." Northern California, he said, "continues to perform as expected." Fourth-quarter gross margin is now expected to land about one percentage point below what the June outlook implied.
Who Holds the Risk
Built to order moves inventory risk off the builder's balance sheet and into the backlog. A spec builder with an unsold house absorbs a falling market through price cuts. A built-to-order buyer who signed in August carries it through the months between contract and closing, and can walk away. KB Home's cancellation rate was 18 percent of gross orders, against 17 percent a year earlier and 12 percent in each of the first two quarters of this fiscal year.
Those months got harder. The Federal Reserve raised its benchmark rate on September 16 to a range of 3.75 to 4 percent, its first increase since 2023. The next day Freddie Mac put the average 30-year mortgage rate at 6.95 percent, up from 6.76 percent a week earlier and 6.26 percent a year earlier. Existing-home supply reached 4.9 months in August, the highest in more than ten years, according to the National Association of Realtors. Executive chairman Jeff Mezger called resale inventory "our largest competitor."
KB Home's buyers look strong on paper. The average customer of its mortgage joint venture put down 16 percent, about $76,000, with household income near $134,000 and a FICO score of 742. That profile is the best defense of the backlog. Good credit keeps a buyer qualified. Whether the buyer still wants a contract signed at summer prices, with resale listings piling up nearby, is a separate question.
The Test
The bathtub effect is a one-time shift. Once the built-to-order share stops rising, the conversion rate settles and the backlog has to grow the ordinary way, through orders. KB Home says it has already reached its target mix. Faster builds push the other way: McGibney said further improvement toward a 90-day build target is "expected to be more gradual", and every day cut drains the tub a little quicker.
McGibney also said KB Home expects "to begin the year with a higher backlog than we began fiscal 2026." That bar is low. The company entered fiscal 2026 with 3,128 homes in backlog. Starting from 4,398 and delivering 3,250 homes, the midpoint of fourth-quarter guidance, KB Home clears it with any fourth-quarter order count above about 1,980. It took 2,414 orders in the same quarter last year. The promise holds unless fourth-quarter orders fall more than 18 percent, a steeper drop than the 12 percent just reported.
Management is spending as if the far side of the cycle is close. KB Home invested $722 million in land and land development in the quarter, 40 percent more than a year earlier, drew $415 million on its revolving credit facility, and ended with $159 million in cash. It bought back about 890,000 shares at an average price Mezger said was below book value, which stood at $62.56 a share. The stock closed at $48.59 on September 22.
The figure to watch when KB Home reports in December is orders per community, the inflow, and it fell 18 percent this quarter. Every stock figure in a filing, from a homebuilder's backlog to a software company's contracted revenue to a bank's deposits, is the residue of two flows. When a level moves against its inflow, check the outflow first. KB Home's tub is fuller because the drain got slower.