Congressional Budget Office Cost Estimate: S. 1796: Justice for Victims of Terrorism Act [open pdf - 13KB]
"S. 1796 would enable victims of Iranian terrorism who have won judgments against Iran in U.S. courts to collect monetary damages from that country--primarily by obtaining certain funds currently held by the U.S. government. Although the bill would pertain to victims of other nations that sponsor terrorism, CBO does not expect that any budgetary effects would result from judgments against other nations. Enactment of S. 1796 could result in savings in later years if future disbursements that would otherwise have to be made under current law were reduced because of the payments made in 2001. CBO has no basis for estimating these effects--if any--because they would depend on future decisions of the international Iran-U.S. Claims Tribunal and the responses of the United States and Iran to these decisions."
Congressional Budget Office: http://cbo.gov