WASHINGTON — The CIA leak probe cost $2.58 million, the Government Accountability Office disclosed yesterday, wrapping up an investigation that ensnared Vice President Dick Cheney’s chief of staff for perjury, obstruction, and lying to the FBI.

The office of Special Counsel Patrick Fitzgerald spent the money over a 45-month span that saw the indictment, trial, and conviction of I. Lewis “Scooter” Libby. The investigation also touched on other officials in the State Department and the White House, including presidential political adviser Karl Rove, who leaked the CIA identity of Valerie Plame.

“This matter is now concluded for all practical purposes,” reported the GAO, the investigative arm of Congress. The office of special counsel will continue to incur small expenses for limited purposes, such as responding to congressional requests for information.

The spending total consists of figures from eight reports issued by the GAO since early 2004, with the latest issued yesterday. It showed $187,420 in expenditures for the six months ending last September 30.

At the height of Mr. Fitzgerald’s work, the office spent $770,838 for the six months ending March 31, 2007, the month a jury convicted Mr. Cheney’s former chief of staff. Libby ended up paying a $250,000 fine and is on two years probation, all that remains from President Bush’s commutation of Libby’s prison term.