Australian Greens Leader Christine Milne welcomes today's commitment from Shadow Treasurer Chris Bowen that a Labor government would enhance the role of the independent Parliamentary Budget Office.

"The Greens set up the PBO in our agreement with the former government and it has already improved accountability and transparency when it comes to promises made by all political parties," said Senator Milne.

"Just last month the Greens made an inquiry submission calling for greater powers for the PBO and greater transparency.

"The Greens will move to end, once and for all, the election policy costing shambles," Australian Greens Leader Senator Christine Milne said.

"In the next parliament we will move legislation to ensure election policies are independently costed and made publicly available as soon as Treasury and the Parliamentary Budget Office can cost them.

"To have policy costings released without independent verification and two days from polling day is an insult to the public.