JAKARTA (Reuters) -Indonesia is finalising a plan to charge an export tax of between 7.5% and 15% 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.

He gave an example of a higher rate for gold dore - bars or ingots with impurities - and a lower rate for minted bars.

Global gold prices will also be a factor in determining the export taxes, he said.

(Reporting by Gayatri Suroyo; Editing by John Mair)