Voters lock in their decision: poll

A new poll shows most voters have made up their minds about who to vote for at the federal election.

Three-quarters of voters have decided who they will vote for at the September 7 federal election.

In the latest Essential poll published on Monday, 44 per cent of voters say they will "definitely not" change their mind, while a further 30 per cent say a shift is "very unlikely".

The poll has the coalition on 51 per cent of the two-party vote to Labor's 49 per cent - the same result as two weeks ago.

Opposition Leader Tony Abbott leads Prime Minister Kevin Rudd in terms of opinion on who is best to manage the economy, controlling interest rates, national security and treatment of asylum seekers.

Mr Rudd is more favoured in terms of school education, health, industrial relations and climate change.