Taxing Bitcoin Cryptocurrencies, like Bitcoin, are independent and not regulated by any central authority. Until recently, these digital currencies were not treated in the same way as cash for tax purposes in Australia. New legislation passed by Parliament last month seeks to change all of that by removing GST from currency exchanges. How are cryptocurrencies taxed? Under GST law, a 10% GST applies to supplies of goods and services. Money receives special treatment because it’s a medium of exchange and not something for final private consumption.