California’s home insurance plan of last resort, designed for people who can’t get coverage on the private market, does not have enough money to pay claims from the Los Angeles wildfires and is getting an infusion of cash from regular insurers.

State regulators said Tuesday that they will allow the program, known as the FAIR Plan, to collect $1 billion from private insurance companies doing business in California to pay its claims. That is likely to drive up insurance costs for homeowners across the state.

The situation marks a perilous new stage for California’s home insurance market, which had already been reeling from wildfires made more frequent and intense by climate change. Facing growing losses, major insurers like State Farm were already pulling back from the state, making it harder for homeowners to find coverage.

Now the pressure to leave will be even greater.

The $1 billion assessment is the largest since the FAIR Plan was created in 1968, and the first time since the 1994 Northridge earthquake near Los Angeles that the FAIR Plan has faced claims it can’t pay on its own. The fee will be divided among insurers based on their market share, as required by state law.

“The number one priority right now is that the FAIR Plan pay out its claims,” Ricardo Lara, California’s insurance commissioner, said in an interview. “The FAIR Plan, the way we’ve set it up, is doing what it’s supposed to.”

As of 2023, the state’s largest insurers by market share were State Farm, Farmers Insurance Group and CSAA Insurance, according to data from AM Best, a company that rates the financial strength of insurers. Other major insurers in the top 10 included Liberty Mutual, Allstate and Travelers.