The Queensland Council of Unions (QCU) says State Government chief executives can earn bonuses by sacking extra staff.

In July, the State Government denied there was a so-called "boot bonus" in chief executive contracts for reducing staff in their departments.

But the QCU says documents from the Public Service Commission show department chief executives can earn bonuses of up to 15 per cent for making further staff cuts, beyond those announced in the state budget.

QCU spokesman John Battams says that shows the job cuts are far from over.

"The concern is that the rhetoric from this Government that the cuts are over and we can look forward to happy times, is simply not true," he said.

"There's an active encouragement by this Government to chief executives to actually cut staff numbers further."

Opposition Leader Annastacia Palaszczuk says managers should not be able to earn bonuses.

"These directors-generals are nothing more than bounty hunters who are being paid to sack people," she said.

Premier Campbell Newman has referred questions on the matter to his Minister Glen Elmes.