For US citizens the rule is "paid almost anywhere," with a named exception. The Social Security Administration will send payments to a citizen in nearly every country. The firm exceptions are Cuba and North Korea, where US law prevents the agency from sending payments; a beneficiary in one of those countries generally cannot receive the withheld payments until they move to a country where the agency can pay, at which point the withheld amounts are usually released. A few additional countries can be paid only under restricted conditions, such as the beneficiary appearing in person at a US embassy. These lists change with foreign policy, so the current position should be checked with the agency, but the everyday reality for a retiree in most of the world is uninterrupted payment.
Non-citizens face the alien nonpayment provision, which is the main added hurdle. A beneficiary who is not a US citizen and who remains outside the United States for six consecutive calendar months generally has their benefits suspended beginning with the seventh month, unless they fit an exception. The exceptions are broad enough to cover many people: citizens of countries that have a Social Security agreement with the United States, citizens of countries with their own social-insurance systems that pay US citizens, beneficiaries who meet certain US-residence and family-relationship conditions, and others. A suspended benefit resumes once the person returns to the United States and stays for a full calendar month. This rule catches non-citizen spouses and survivors in particular, and it is the reason a non-citizen's ability to be paid abroad cannot be assumed the way a citizen's can.
Totalization can create the benefit in the first place. Someone whose career was split between the United States and another country may lack the 40 US credits normally needed to qualify. Where a totalization agreement exists, the foreign credits can be counted toward US eligibility, so a person who paid into both systems can receive a prorated US benefit rather than nothing. This is a separate mechanism from the rules about paying an already-entitled person abroad; it is about becoming entitled at all.
The Windfall Elimination Provision no longer reduces these benefits, and this is a recent change. For years, a US Social Security benefit could be reduced by the Windfall Elimination Provision when the beneficiary also received a pension from work not covered by US Social Security, which included many foreign pensions. The Social Security Fairness Act repealed the Windfall Elimination Provision and the Government Pension Offset, effective for benefits payable after December 2023. So a retiree with a foreign pension is no longer subject to a WEP reduction of their US benefit on that account. Any guidance describing a foreign pension as triggering a WEP cut is describing law that has been repealed.
Taxation abroad depends on citizenship. A US citizen abroad is taxed on Social Security benefits under the ordinary rules, with up to 85 percent of the benefit potentially taxable depending on total income. A beneficiary who is a nonresident alien is generally subject to a flat withholding on a fixed portion of the benefit unless a tax treaty reduces it, which is a different and often higher effective rate. So two people receiving the same dollar benefit in the same country can be taxed quite differently depending on whether they are US citizens.