Anti-piracy group the Business Software Alliance (BSA) is offering a £20,000 reward to anyone who informs on employers using illegal or unlicensed software.
The bounty has been doubled from the existing £10,000 until the end of June this year.
The BSA said it had launched 420 company investigations in the last 12 months following tip-offs. The majority of informants came from employees in IT.
The BSA said there was no excuse for firms using illegal or unlicensed software, and that there were now plenty of employees willing to inform on their bosses for doing so.
A YouGov poll commissioned by the BSA found that three-quarters of workers would consider informing on their company if they felt that their boss had treated them unfairly.
In addition, a quarter said a poor pay rise could lead them to tip off the BSA.
The bounties are paid out if a subsequent investigation finds that an employer has used illegal or unlicensed software.