No. Only dividends are subject to withholding taxes (and are taxed twice, once in the US at 15%, the remainder taxed at 27%). It's a crazy system. Before you t

No. Only dividends are subject to withholding taxes (and are taxed twice, once in the US at 15%, the remainder taxed at 27%). It's a crazy system. Before you think of moving to Belgium: US citizens can't escape the IRS, no matter where they live, and so do pay capital gains tax.