A Federal Deposit Insurance Corp. program that expanded safeguards for some business and government bank accounts will probably expire on Dec. 31 after the U.S. Senate failed to advance a proposal for an extension.

A 50-42 vote Thursday on a procedural motion fell 10 short of the 60 needed to move forward on a two-year extension of the Transaction Account Guarantee Program, effectively killing it. The TAG program, introduced in the wake of the 2008 credit crisis, guarantees $1.5 trillion in non-interest bearing accounts above the FDIC’s general limit of $250,000. An extension in 2010 is set to expire at the end of the year.