Fifty-five of Australia's highest earners paid no income tax at all during 2012-13, not even the Medicare levy.

All earning at least $1 million, they managed to write their taxable incomes down to below the $18,200 tax-free threshold, although for most the exercise was expensive.

Thin capitalisation. What is it? What might it possibly mean to you? Exactly. Credit:Virginia Star

Tax statistics released Wednesday reveal that 40 of them claimed an extraordinary $42.5 million for the "cost of managing tax affairs" meaning they each paid an average of $1 million to an adviser prepared to help to bring down their taxable income, which is itself a tax deduction.

Between them they reported earning $129.5 million, an average of $2.3 million. By the time their accountants had finished with them they reported losing a combined $12.8 million.