The 10 jobs that claim the biggest tax deductions in Australia have been revealed by online service provider etax.com.au.

The figures, which represent overall data from the Australian Taxation Office and not just those from etax.com.au customers, show that the average Australian claims $3041 of deductions on their tax return.

Real estate agents and lawyers topped the league table, claiming $8634 and $7156 respectively.

But those people shouldn't be judged as shady because, according to etax.com.au senior tax agent Simone Gielis, there are legitimate reasons why some jobs force people to rack up a high level of expenses.