Applicability of W-8BEN form to Indian citizen working in India for subsidiary of a U.S. company?

How long is w8ben valid for?

three calendar years

Forms W-8 are valid for the year in which they are signed and for the next three calendar years. For example, a Form W-8BEN signed on March 5, 2018, remains valid through December 31, 2021, and must be resubmitted to IBKR no later than January 30, 2022.

Who needs a W9?

independent contractors

Those who should fill out a W 9 are those who are working as independent contractors or freelancers, because the W-9 is the form used by the IRS to help gather information about such workers. The W-9 form is an informational reporting tax form, meaning that it provides information to the IRS about taxable entities.