Prime Minister Scott Morrison is pushing back against pressure from Labor to bring federal parliament back for extra weeks to deal with the fallout of the banking royal commission.

Labor leader Bill Shorten has written to Mr Morrison asking for two extra sitting weeks in March to ensure changes are made in response to the inquiry before voters go to the polls in May.

"It's critical that these changes are legislated as soon as possible and I request that you recall both house of parliament," Mr Shorten wrote on Tuesday.

But the coalition has dismissed the request.

"We won't be lectured by Bill Shorten, who still hasn't outlined which recommendations Labor would implement," a government spokesman said.

Labor wants to expedite the commission's recommendation to end grandfathered commissions for financial advice and change laws to ban hawking of superannuation and insurance in line with other recommendations.

The government, which has said it will "take action" on all 76 of the commission's recommendations, says legislation is already before parliament to deal with increased penalties for white collar crime.

The Protecting Your Super legislation, aimed at protecting Australians' retirement savings from excessive fees and insurance premiums, and increased powers for regulators are also before parliament.

Parliament will sit for two weeks in February and the April budget week, before the federal election is held.

Finance Minister Mathias Cormann says that timetable is required.

"The Labor Party knows that we will have to deliver the budget in early April, and in the context of that timetable we have the appropriate number of sitting weeks," the senator told told ABC News.

Mr Morrison has played down Labor's call for extra weeks, but repeated his regret about delaying calling the royal commission, which handed down its final report on Monday.

"I expressed my regret last year, and I meant it. But we just got on with it. Australians know it's about the action that you take," he told reporters in Townsville.