Taxpayers are spending $200 million per year on concessions for Australia’s 100 largest self-managed super funds, with new data showing the 32 biggest accounts each have more than $100 million assets, including one mega-SMSF with $401 million.

The release of the figures, published by the Australian Taxation Office on its freedom of information log, follow calls by economists to rein in and simplify Australia’s system of generous superannuation tax concessions which Treasury estimates will cost $93 billion over the next four years.