Black, 67, is incarcerated at a federal prison in Miami and the Canadian Broadcasting Corp. reported his release date is listed as Saturday. Federal Bureau of Prisons spokeswoman Tracy Billingsley told the CBC the date is only a "projected estimate" but is "generally accurate." She said he could be free as early as Friday.
"When a release date falls on a weekend, we can release them on the Friday prior to that weekend," Billingsley said.
Black was resentenced last June to 42 months in prison after some of his convictions on fraud and obstruction of justice charges were overturned by the U.S. Supreme Court. He had already served 29 months under his original sentence of 78 months.
Last August, Black, a native of Canada, told the CBC he wants to return to Toronto where he owns a home and his wife, journalist Barbara Amiel, lives. Canadian officials haven't said whether they will allow him back into the country, the CBC said.
Black gave up his Canadian citizenship in 2001 to accept a seat in Britain's House of Lords.