Officials at the Federal Deposit Insurance Corp. (FDIC) Thursday detailed a plan to prevent 1.5 million foreclosures in the next year by offering financial incentives to companies that agree to sharply reduce monthly payments on mortgage loans.

The proposal, which has the support of leading congressional Democrats, would considerably expand the scope and force of the government's efforts to stem foreclosures. Agency officials estimated the cost to the government at $24.4 billion.

FDIC Chairman Sheila C. Bair continues to face opposition within the Bush administration. Treasury Secretary Henry M. Paulson, Jr., said Wednesday that he opposed funding the plan from the government's $700 billion financial rescue fund, which has been used primarily to rescue banks and encourage lending. FDIC officials say they are still in talks with the Treasury, but proponents increasingly view the Bush administration as a roadblock with an expiration date.

"We think it's essential that we actually strike at the underlying cause of the problems in the financial markets," said Michael Krimminger, special adviser for policy at the FDIC. "We think it's time to make a decisive difference in the housing markets on foreclosures."

The FDIC proposal, which is scheduled to be announced today, goes farther toward helping borrowers than existing modification efforts. At the same time, the initiative is designed to be less expensive for mortgage companies because the government would pick up part of the tab.