The lawsuit challenges the 10 per cent service fee charged in 95 per cent of Australian taxis for every payment by debit card, credit card or charge account. Lack of competition in taxi fare processing has allowed the biggest player in the industry, Cabcharge Australia, to maintain its hefty 10 per cent commission even as its costs have plummeted thanks to changes in technology, the Australian Competition and Consumer Commission claims. Details of the alleged financial benefits to Cabcharge of having few rivals are contained in an 88-page statement of claim filed in the Federal Court last Friday by the ACCC.