Labor is concerned prosecutors will be unable to launch action against dodgy bankers and financial crooks when their dedicated funding runs out.
Money allocated to the Commonwealth Director of Public Prosecutions to pursue serious financial crime is due to end in about 12 months' time.
Labor's Murray Watt quizzed officials about the potential fallout during a Senate estimates hearing on Thursday, particularly given the examples of bad behaviour aired at the Hayne banking royal commission.
"I accept you've got other funding," Senator Watt put to the heads of the agency in Canberra.
"But the funding you've specifically been given to prosecute serious financial crime runs out at the end of this coming financial year, and you've been given no assurance at this point that funding is going to continue."
The Commonwealth DPP has $3.7 million in 2018-19 for its serious financial crimes task force, as part of a $127.6 million commitment the coalition made in 2015.
The agency had internal discussions about asking for an extension of funding, but hasn't requested it from the attorney-general or his department.
Asked whether extra funds would be needed to prosecute wrongdoings aired at the royal commission, Commonwealth DPP Sarah McNaughton said: "It's so theoretical at this point, we don't have any need to have such a discussion. There's no request to make."
Cabinet Minister Michaelia Cash said the government would consider the need for extra funding once the commission hands down its report.
"When the findings and recommendations are handed down, that is the appropriate time to consider them and then deal with them in an appropriate manner," Senator Cash said.
