Leaders of the Senate Finance Committee are introducing a bill that would renew and extend a key provision that benefits donors with individual retirement accounts.

Until December 31 of last year, donors who are 70 1/2 or older were able to transfer up to $100,000 to charity from their individual retirement accounts each year without paying income taxes on the money.

The new bill would extend this provision to the end of 2009, according to its authors, Sens. Max Baucus, a Montana Democrat who chairs the Senate Finance Committee, and Charles Grassley of Iowa, the committee’s senior Republican.

Additional provisions in the bill drafted by Mr. Baucus and Mr. Grassley would renew and extend other provisions for charitable giving, including one involving certain donated property used for conservation purposes and another for certain deductions allowed for donations of food.