The agency plans to mail depositors roughly $200 million Thursday.
The maximum the FDIC would insure in any single deposit account was raised from $100,000 to $250,000 at the height of the financial crisis in October 2008, as part of the $700 billion rescue package.
The law President Barack Obama signed Wednesday makes the higher cap permanent, retroactive to Jan. 1, 2008.
That means the customers of six banks that failed between Jan. 1 and Oct. 3, 2008, whose accounts held between $100,000 and $250,000 will receive more than they would have.
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