The Federal Government will scrap entry fees for Kakadu National Park earlier than planned.

The Parliamentary Secretary for the Environment and Heritage, Greg Hunt, says entry will be free from December 20.

In July, the park's traditional owners expressed concern they were not consulted in the plans to abolish the fees.

But Mr Hunt says a four-year interim agreement with the traditional owners has been confirmed and will take immediate effect, pending financial arrangements.

"It will be funding based on the last five years which will be higher than they otherwise would have received," he said.

"A total figure we're going to identify and agree on shortly, but the Commonwealth will make up the $4 million per year both to the combination of the traditional owners and to Parks Australia."