A group of politicians is contemplating the switch from three-year to four-year terms and wants to hear the public's views.

The federal parliament is the only jurisdiction left in the country that hasn't made the move to the longer terms, but the change is tricky because it requires a referendum.

The constitution mandates three-year terms for the House of Representatives and six-year ones for senators.

"Four-year terms could address the community's concerns about the revolving doors of politicians and policy by providing more stability and opportunities for longer-term outcomes," committee chair Andrew Wallace said on Monday.

"On the other hand, there may be downsides to fixed parliamentary terms. Current events in the United Kingdom show that this issue is one that needs careful consideration."

The legal affairs committee will hold a roundtable with constitutional experts on November 7 to discuss the matter.

It wants the public to submit questions for the experts ahead of time, and will also take questions live on Twitter during the panel discussion.

Australian Associated Press