A credit is allowed for foreign income taxes paid or accrued. The money is limited to that particular part of Oughout.S. tax due to foreign source income. It is not refundable, but any excess credit the carried to other years to reduce tax. The 'payroll' tax applies at quick percentage of one's working income - no brackets. With regard to employee, fresh 6.2% of one's working income for Social Security (only up to $106,800 income) and 4 transfer pricing .45% of it for Medicare (no limit)....