Sally Holgate, 44, stole the money by diverting funds using names of employees who did not work for the firm.
The payroll clerk siphoned £40,000 of the money she stole from demolition firm Squibb Group in Barking, Essex, into a bank account in the name of her 16-year-old son.
The scam was maintained for more than a year before a tip-off exposed the thefts to her bosses, Snaresbrook Crown Court heard.
Holgate’s solicitor said she took the money to feed her cocaine addiction and had taken steps to get clean by enrolling on a drug rehabilitation course.
Holgate, from Dagenham, pleaded guilty to fraud by false representation under the Fraud Act 2006.
She received a 12 month prison sentence suspended for a year and was electronically tagged. She was also required to undergo further treatment for drug dependency.
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