https://www.irs.gov/individuals/international-taxpayers/social-security-tax-consequences-of-working-abroad https://www.irs.gov/individuals/international-taxpaye

https://www.irs.gov/individuals/international-taxpayers/social-security-tax-consequences-of-working-abroad https://www.irs.gov/individuals/international-taxpayers/soci... If Mr. X has no US-source income and earns income in a country with no totalization agreement with the US he can save the money he’s not paying for Social Security and Medicare in a savings account, IRA, etc. it’s not like the government-run programs are paying high interest.