What Form W-8BEN is
The IRS instructions say that if you receive certain types of income from U.S. sources, you must provide Form W-8BEN to establish that you are not a U.S. person, to claim that you are the beneficial owner of the income, and, if applicable, to claim a reduced rate of, or exemption from, withholding as a resident of a foreign country with which the United States has an income tax treaty. The instructions say foreign persons are subject to U.S. tax at a 30% rate on certain U.S.-source income, generally collected by withholding. RepeatForm cannot tell you whether you owe tax, what rate applies or whether a treaty applies to you.