How should the British Social Security income be reported?
Under the U.S.-United Kingdom income tax treaty that entered into force during 2003, social security income is taxable only by the country of residence. If you are a resident of the U.S. for tax purposes, the income would be reported and taxed in the U.S. You would not treat the income as U.S. social security benefits. The entire amount would be taxable as pension and annuity income on your U.S. tax return. Your “investment in the contract” for purposes of determining the portion of each payment that is taxable would be $0. Under the prior treaty with the UK, social security benefits were treated the same way. For additional information, see Publication 519, U.S. Tax Guide for Aliens, and Publication 575, Pension and Annuity Income.
