Taxability

This is dependent on where and how the gold is held. It is potentially taxable if it’s overseas in an investment account and you have a gold ETF. If it makes a profit and you sell that asset and remit into Thailand, you will be taxed on capital gains. You cannot use losses to offset future gains or for other assets or asset classes. There maybe tax credits available if tax has been paid in the other jurisdiction, depending on the DTA between that country and Thailand.

Learn more about tax assessable foreign-sources income here