TaxesWiki Por Dividendos
W-8BEN
"A US tax form that lets non resident investors apply treaty benefits to reduce withholding on US dividends."
The W-8BEN is the IRS form with which you certify that you are not a US tax resident and claim the benefits of the double-taxation treaty. Its practical effect for a Spanish investor is a single, very concrete one: withholding on your American dividends drops from 30% to 15%.
Without a W-8BEN, every Coca-Cola or Microsoft dividend loses nearly a third at the border; with it, half of that withholding — and the remaining part is creditable later in your Spanish return. It is probably the best effort-to-benefit form in all of international investing.
How to file it (spoiler: almost by itself)
You never deal with the IRS directly: your broker handles it. Most include it in the account-opening flow — a few boxes confirming your name, country of tax residence and tax ID — and ask you again when renewal is due. The key facts:
- Validity: the year of signature plus three full calendar years. Then it must be renewed (brokers usually prompt you).
- Change of circumstances: if your country of tax residence changes, you must update it without waiting for expiry.