Support for the Australian Greens has surged to a record high as voters turn away from the major parties.

The latest Newspoll shows the Greens have jumped six points in six weeks to score 16 per cent support.

They usually poll around 10 per cent of the primary vote and were at 12 per cent in the last poll.

The Greens' gain was Labor and the Liberals' loss.

They both lost two points, taking Labor down to 35 per cent of the primary vote and the Liberals to 41.

Labor is hanging on to government with a razor-thin majority on the all-important two-party preferred vote. The ALP leads the coalition 51 to 49.

The federal election is expected later this year.

The political debate has been dominated in recent weeks by a pitched battle between Labor and the Liberals over the Government's proposed tax hike on mining profits.

The poll appears to indicate that neither side is winning over the voters as the issue dominates the airwaves.

Thirty-six per cent of those polled said they were in favour of the resource super profits tax, with 41 per cent opposed.

The survey says 22 per cent of people think they will be better off under the tax, while 31 per cent think they will be worse off.

The Newspoll was published on The Australian newspaper's website on Monday night.

- AAP/ABC