The sentence follows a fall from a rarefied perch where he wielded power with a signature mix of brash confidence and tough-guy charm.

He was a close ally of former Mayor Rudolph W. Giuliani, whom he served as a bodyguard and driver. Mr. Giuliani then tapped him for a senior position in the Correction Department, and he went on to become the agency’s commissioner. As testament to his clout, Mr. Kerik had a jail named after him in downtown Manhattan. (The name has since been changed.)

Mr. Kerik later served as police commissioner, and his performance after the 9/11 attacks turned him into a national figure, earning him the respect of President George W. Bush, who nominated him to lead the Department of Homeland Security. That bid quickly collapsed in scandal, marking the beginning of the end of Mr. Kerik’s career.

The case against Mr. Kerik centered on charges that a New Jersey construction company, the Interstate Industrial Corporation, which was suspected of ties to organized crime, had paid for renovations at his home in the Riverdale section of the Bronx. Prosecutors said company officials had hoped Mr. Kerik would help them obtain a city license.

In June 2006, Mr. Kerik pleaded guilty in State Supreme Court in the Bronx to two misdemeanors tied to the renovation of his apartment. He paid $221,000 in fines and penalties but avoided any jail time.

In the more recent federal case, Mr. Kerik pleaded guilty to two counts of tax fraud, one count of making a false statement on a loan application and five counts of making false statements to the federal government while being vetted for senior posts. Judge Robinson ordered him to pay restitution of $187,931 to the Internal Revenue Service.

Prosecutors had called for Judge Robinson to make an example out of Mr. Kerik, and to punish him for his “egotism and hubris.”