Pensions and Annuities
If you receive a pension from a domestic trust for services performed both in and outside the United States, part of the pension payment is from U.S. sources. That part is the amount attributable to earnings of the pension plan and the employer contributions made for services performed in the United States. This applies whether the distribution is made under a qualified or nonqualified stock bonus, pension, profit-sharing, or annuity plan (whether or not funded).
If you performed services as an employee of the United States, you may receive a distribution from the U.S. Government under a plan, such as the Civil Service Retirement System, that is treated as a qualified pension plan. Your U.S. source income is the otherwise taxable amount of the distribution that is attributable to your total U.S. Government basic pay other than tax-exempt pay for services performed outside the United States.