Lord Taylor of Warwick, the first black member of the House of Lords, defrauded the expenses system by more than £11,000.
The 58-year-old, dressed in black suit, blue tie and shirt, looked impassive as the sentence was passed at Southwark Crown Court.
Mr Justice Saunders said Taylor had ruined his life “not by one stupid action but by a protracted course of dishonesty”.
Taylor was found guilty in January this year for claiming in 2006 and 2007 that his main residence was in Oxford, when he actually owned just the one home in Ealing, west London.
He subsequently claimed an overnight allowance and travelling expenses to which he was not entitled.
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