Home buyers will have to lay out more cash for an FHA mortgage

Thousands of Southern California home buyers, and millions nationwide, will have to come up with more cash and reach higher minimum credit scores to get a government-backed mortgage under changes unveiled by the Federal Housing Administration.

Some loans might require more than the current 3.5% minimum down payment, but the Obama administration is resisting calls for an across-the-board hike. Instead, it is looking at other ways to increase the amount of cash at closing, such as requiring borrowers to pay more of their mortgage insurance premiums up front.

The FHA, which insures mortgages with low down payments, is scrambling to balance its increasingly important role in propping up the housing market with faltering finances of its own that could require a government bailout.

The agency's share of home loans has surged from 3% in 2006 to nearly 30% this year as credit has tightened and borrowers' bank accounts have been depleted. But that increased exposure has led to more defaults, driving the FHA's reserves below their mandated levels.