The Form W-8 remains in effect for the period beginning on the date it is signed and ending on the last day of the third succeeding calendar year. IBKR will notify clients in advance when a Form W-8 is about to expire and will present them with the online Tax Form upon login to Client Portal.
NOTE
- If, at any time, a client changes their country of legal residence or becomes a U.S. person, they will need to complete the Tax Form within Client Portal to determine their taxpayer status and what international treaty withholding rate on dividends, if any, they then qualify for.