A judge warned two brothers to expect jail after they pleaded guilty to claiming thousands of pounds in false wages from a civil engineering firm.
Sean Sullivan, 46, of Adelaide Close, Waddington, and Paul Sullivan, 41, of Salisbury Close, Saxilby, each admitted a charge of obtaining property by deception.
The pair had claimed £155,452 from Balfour Beatty between November 2005 and October 2009.
Mark Knowles, defending Paul Sullivan, said his client had pleaded guilty to claiming a sum of £64,319.
Sean Sullivan also admitted three further fraud charges on different dates between November 2009 and March 2011.
Judge Sean Morris agreed to grant both men bail for the preparation of a probation report after they entered their guilty pleas at Lincoln Crown Court.
But Judge Morris warned them: "These are very serious matters. On the face of it the only outcome is custody so you have some time to get your houses in order."
The two men will be sentenced at Lincoln Crown Court on a date to be fixed.