The rental-assistance program keeping hundreds of San Francisco families in their homes isn't a city program at all — it's an $11 million private philanthropic pilot that expires at the end of 2026, with no public funding stream lined up to replace it.

Prevention — writing a check before an eviction notice arrives — is the cheapest tool the city has against family homelessness, far cheaper than the roughly $1 million it costs to build a single unit of permanent supportive housing. But in San Francisco the approach is being carried almost entirely by donors, not the public purse. Tipping Point Community, the anti-poverty nonprofit founded by Mayor Daniel Lurie before he took office, is bankrolling the effort. The pilot has been extended six months to December, after which its future depends on an external evaluation and, ultimately, on whether anyone steps in with sustained money. Meanwhile the need is climbing faster than the funding.

For families on the edge, the math of prevention is brutally simple. KQED reported the case of Esmeralda Celis, a mother of four near Civic Center whose husband was forced to leave the country for months because of his immigration status, cutting off the family's income last winter. A school counselor connected her to Compass Family Services, which covered her $2,600 monthly rent from January through May until her husband could return and go back to work.

"The instability of not having a home or roof would have been detrimental for my children," Celis, whose daughter has cystic fibrosis, told KQED. "This definitely helped with the stability and, more than anything, keeping my children's peace."

Compass is one of several nonprofits — alongside the Mission Economic Development Agency, APA Family Support Services, Mission Neighborhood Centers and Glide — drawing on a pool of private money to catch families before a one-time financial shock becomes an eviction. Tipping Point Community lists all but Glide among the grantees in its San Francisco homelessness project, which it says is built around three priorities: prevention, populations hit hardest by homelessness, and "improved transparency and accountability." The aid has ranged from a few hundred dollars to several thousand, KQED reported — car repairs, medical bills, a couple months of rent.

Here is the part the human-interest framing tends to skip: none of this is guaranteed to outlast the year. Tipping Point, which Lurie built into a $34 million-a-year grantmaker, put roughly $11 million into the yearlong prevention pilot, according to KQED, and it has served nearly 900 families so far. Executive director Sam Cobbs told the outlet the program is reaching "people who wouldn't have traditionally touched the family homelessness system until much later on." The pilot was extended to December; what comes next is a study, not a budget line.

That matters because the demand curve is pointing the wrong way. Family homelessness rose 15% in the city's latest point-in-time count, and the number of people in those families jumped 34% — from 1,103 in 2024 to 1,474 this year, KQED reported, citing the count. The average two-bedroom now rents for $6,382, per Zillow, a figure inflated by the same AI boom minting fortunes a few blocks away.

The public money, meanwhile, is tilted toward the expensive end. The Dissent has documented what the city's build-first approach costs — nine years and $166 million to produce 160 supportive-housing units at a former Haight Street McDonald's, roughly a million dollars a door. There is no federal funding stream for the kind of light-touch prevention Compass is doing, and federal affordable-housing dollars have been shrinking. San Francisco just signed a record $16.9 billion budget "as federal money recedes," in the words of the mayor's own office.

Other counties have tried to make prevention permanent rather than pilot it. Santa Clara County in 2024 folded a prevention model built by the San Jose nonprofit Destination: Home into its public safety net; it now reaches roughly 2,500 households a year. San Francisco has not committed to anything comparable. For now, the families staying housed are doing so on the strength of a donor's yearlong bet — one that runs out of runway in December.