One hundred of Australia's richest people have taken advantage of a rare amnesty from the Australian Taxation Office - issued in March this year - to reveal their use of secretive offshore tax havens without severe punishment.

There has also been a ''large number of expressions of interest'' in addition to those 100 people, according to the ATO's second commissioner of compliance, Neil Olesen.

The Australian Taxation Office introduced the so-called tax amnesty to encourage rich taxpayers with offshore assets to declare their interests and tax structures. Credit:Michel O'Sullivan

The Australian Taxation Office introduced the so-called tax amnesty to encourage rich taxpayers with offshore assets to declare their interests and tax structures ahead of a global crackdown on international tax havens.