 However, most merchants who provide the facility set a relatively low limit on cash out, generally $50, and some also charge for the service.Some merchants in Australia only allow cash out with the purchase of goods; other merchants allow cash out whether or not customers buy any goods.Cash out is not available in association with credit card sales because on credit card transactions the merchant is charged a percentage commission based on the transaction value, and also because cash withdrawals are treated differently from purchase transactions by the credit card company.