JAKARTA :Indonesia is finalising a plan to charge an export tax of between 7.5 per cent and 15 per cent on shipments of gold products, which will be implemented sometime next year, a senior finance ministry official said on Monday. The tax policy is being designed so that higher rates are imposed on upstream products and lower rates are put on processed goods to help encourage domestic processing, Febrio Kacaribu, the ministry's director general of fiscal strategy, told a parliamentary hearing.