About $100 million appears to have disappeared from Plutus Payroll, the company at the centre Australia's largest tax fraud case, according to a first report from liquidators who are now investigating tens of millions of dollars pumped out of the company to related entities and offshore in the past 12 months.

In his first report to creditors, Tim Norman of Deloitte Financial Advisory estimated that Plutus Payroll Australia, the main company in the group, which had total debts of $44 million, would be left with a "deficiency" of $30 million on a conservative basis.