1. Introduction – What is Publication 6120?
IRS Publication 6120, officially titled Individuals Employed by Foreign Governments & International Organizations in the United States, is the official Internal Revenue Service guidance document for individuals working for foreign embassies, consulates, missions, and international institutions like the United Nations, the World Bank, and the International Monetary Fund (IMF).
Because foreign governments and international organizations enjoy sovereign immunity, they do not operate like traditional American employers. They do not withhold federal income taxes or payroll taxes from paychecks, leaving workers with unique filing responsibilities. The primary operating edition governing 2026 tax obligations is the September revision (officially cataloged and posted by the IRS in October), supplemented by IRS international tax compliance guidance reviewed and confirmed in June 2026.
Whether you are an American citizen working in an embassy office, a lawful permanent resident, or an overseas diplomat stationed in Washington or New York, Publication 6120 outlines exactly how your compensation is treated under United States tax law.
2. Who Should Read This Publication
Publication 6120 is essential reading for anyone whose employer is an entity outside standard United States jurisdiction. The tax rules vary significantly depending on your citizenship and visa status, making this guide vital for four key groups:
- U.S. Citizens: Americans hired locally by foreign missions or international organizations who must navigate special self-employment tax rules.
- Lawful Permanent Residents (Green Card Holders): Immigrant workers who are permanent residents of the United States and subject to distinct income tax and Social Security rules.
- Foreign Nationals on Diplomatic or Official Visas: Noncitizens holding A-class, G-class, or NATO visas stationed in the United States.
- Tax Preparers and Accountants: Enrolled agents, CPAs, and financial advisors assisting international civil servants and diplomatic personnel with U.S. compliance.
3. Key Topics Covered
Publication 6120 breaks down the intersection of international diplomacy and domestic tax law into several straightforward areas:
- Compensation Taxability: Which categories of workers must pay U.S. federal income tax on their compensation, and who qualifies for tax exemption.
- Social Security and Medicare Taxes: How the Federal Insurance Contributions Act (FICA) and the Self-Employment Contributions Act (SECA) apply across different worker classifications.
- Withholding Rules: Why foreign employers do not withhold taxes from wages, and what employees must do instead.
- Quarterly Estimated Tax Payments: How and when workers must pay their taxes throughout the calendar year to avoid penalties.
- Immigration Waivers (Form I-508): The tax consequences of signing a waiver of diplomatic privileges to obtain or retain a green card.
- Residency Determination: How the Substantial Presence Test treats diplomats and international organization staff.
4. Detailed Breakdown of Main Concepts
The U.S. Citizen Rule: Common-Law Employee with Self-Employment Tax
If you are a U.S. citizen working for a foreign embassy or an international organization inside the United States, your earnings are fully subject to U.S. income tax. Furthermore, because foreign employers are exempt from paying the employer share of FICA, federal law treats U.S. citizens as self-employed strictly for Social Security and Medicare tax purposes.
This means U.S. citizens must calculate and pay self-employment tax on Schedule SE. Even though you function as a regular common-law employee on a day-to-day basis, you bear the entire combined self-employment tax rate rather than having it split with your employer.
The Green Card Holder Rule: Income Tax Without Self-Employment Tax
Lawful permanent residents (green card holders) face a different set of rules. As U.S. tax residents, green card holders must report their compensation as taxable wages on Form 1040, unless an applicable tax treaty or organization charter explicitly exempts them.
However, unlike U.S. citizens, green card holders employed by foreign governments or international organizations are not subject to self-employment tax on those wages. In addition, the IRS does not allow green card holders to voluntarily contribute to U.S. Social Security through self-employment tax on these earnings.
Nonimmigrants and Diplomatic Visa Holders (A and G Visas)
Foreign nationals who hold A-1, A-2, G-1, G-2, G-3, or G-4 visas are generally exempt from U.S. federal income tax on their official salaries under Internal Revenue Code Section 893, bilateral consular conventions, or international organization agreements. They are also completely exempt from FICA and self-employment taxes.
For tax residency purposes, individuals present in the United States under these official visa categories are considered “exempt individuals” under the Substantial Presence Test. This means the days spent in the United States under official status do not count toward establishing U.S. tax residency, keeping their filing status as nonresident aliens.
Personal Domestic Staff (A-3 and G-5 Visas)
Publication 6120 highlights a critical exception for personal attendants, domestic workers, and household staff working for diplomats. Individuals holding A-3 or G-5 visas are not considered foreign government-related individuals for the Substantial Presence Test. Their days inside the country count, meaning they can become U.S. tax residents and may owe income taxes depending on their treaty status and total presence.
Comparison Summary
| Worker Category | U.S. Income Tax on Salary | Self-Employment (SECA) Tax | Days Count Toward Residency (SPT) |
|---|---|---|---|
| U.S. Citizen | Yes (Fully Taxable) | Yes (Required on Schedule SE) | N/A (Citizen) |
| Green Card Holder | Yes (Unless exempt by treaty) | No (Exempt; cannot pay voluntarily) | N/A (Permanent Resident) |
| Nonimmigrant (A-1, A-2, G-1 to G-4) | No (Generally exempt) | No (Exempt) | No (Days do not count) |
| Domestic Staff (A-3, G-5) | Varies by treaty/law | Generally No (Unless US citizen) | Yes (Days count toward residency) |
5. Practical Examples or Scenarios
Scenario 1: The American IT Specialist at an Embassy
Maria is a U.S. citizen working as a network administrator at the Embassy of Italy in Washington, D.C. She receives an annual salary of $80,000. Her employer does not withhold federal income tax, Social Security, or Medicare, nor does she receive a Form W-2 at year-end.
Under Publication 6120, Maria must report her $80,000 as wage income on Form 1040. She must also complete Schedule SE to pay self-employment tax. To prevent large end-of-year balances and penalties, Maria calculates her liability and sends quarterly payments using Form 1040-ES.
Scenario 2: The Permanent Resident at the World Bank
David holds a green card and works as an economic analyst for the World Bank. His compensation is $95,000. Because the World Bank does not withhold U.S. taxes, David must manage his own tax obligations.
David reports his salary on Form 1040 as taxable income. However, per Publication 6120, because he is a lawful permanent resident working for an international organization, he is not subject to self-employment tax. He makes quarterly estimated tax payments strictly for his regular federal income tax liability.
Scenario 3: The Foreign Diplomat with Investment Earnings
Sofia is an accredited diplomat from Spain living in Virginia on an A-1 visa. Her diplomatic salary from the Spanish government is completely exempt from U.S. income tax. Days spent on her diplomatic mission do not count toward the Substantial Presence Test.
However, Sofia bought a rental condominium in Arlington that generates rental income. While her diplomatic salary remains tax-free, her U.S. rental income is taxable. Sofia files Form 1040-NR to declare the rental earnings while filing Form 8843 to verify her exempt diplomatic status.
6. How This Publication Relates to Specific Forms
Complying with Publication 6120 requires familiarity with several core tax forms:
- Form 1040 (U.S. Individual Income Tax Return): Used by U.S. citizens and green card holders to report their worldwide compensation, generally entered on the wages line or Schedule 1.
- Form 1040-NR (U.S. Nonresident Alien Income Tax Return): Used by foreign diplomatic staff or nonimmigrant employees who have non-exempt U.S. source income, such as real estate investments or dividends.
- Schedule SE (Self-Employment Tax): Completed by U.S. citizens working for international organizations or foreign governments to calculate their Social Security and Medicare tax liability.
- Form 1040-ES (Estimated Tax for Individuals): Used by workers whose employers do not withhold taxes to submit quarterly payments across four deadlines: April 15, June 15, September 15, and January 15.
- Form 8843 (Statement for Exempt Individuals): Filed by A-visa and G-visa holders to formally explain why their physical days in the United States do not count toward tax residency.
- USCIS Form I-508 (Waiver of Rights, Privileges, Exemptions and Immunities): Filed by individuals adjusting status to permanent residency, waiving statutory tax exemptions granted under internal U.S. immigration law.
7. Common Misunderstandings Clarified
Misconception 1: “I am a regular employee, so I cannot owe self-employment tax.”
Many U.S. citizens believe that because they have set hours, a supervisor, and an employment contract, they cannot be subject to self-employment tax. In this unique international context, federal statute specifically requires U.S. citizens to pay self-employment tax to fund their own Social Security and Medicare accounts.
Misconception 2: “Green card holders must pay self-employment tax just like citizens.”
While green card holders and citizens are taxed similarly on almost all other income, Publication 6120 draws a firm line here. Green card holders working for foreign missions or international organizations are legally excluded from self-employment tax on those wages, and they cannot voluntarily opt in.
Misconception 3: “Embassy salaries are automatically tax-free for everyone.”
Tax exemptions apply strictly based on international treaties, international agreements, or Section 893 of the tax code. These exemptions are designed for foreign nationals representing their home nations. U.S. citizens never receive tax-exempt status on their salary from these employers.
Misconception 4: “I can wait and pay all my taxes when I file in April.”
Because these employers do not operate standard payroll withholding, workers often believe they can settle their entire bill by April 15. The U.S. tax system is pay-as-you-go. If you fail to make adequate quarterly estimated payments, the IRS will assess an underpayment penalty under tax code Section 6654.
8. Why This Publication Matters for Taxpayers
Navigating the rules in Publication 6120 is crucial for avoiding severe financial and legal repercussions. Because tax amounts are not deducted automatically from each paycheck, taxpayers must establish disciplined budgeting to set aside sufficient funds every quarter.
For foreign nationals and lawful permanent residents, tax compliance is tightly linked to immigration status. Failing to report taxable income or incorrectly claiming diplomatic exemptions can create significant complications when renewing visas, applying for lawful permanent resident status, or pursuing U.S. citizenship.
9. Frequently Asked Questions
Does my foreign embassy or international organization issue a Form W-2?
No. Foreign governments and public international organizations are not required to file Form W-2 with the IRS or provide one to employees. Instead, they typically issue an annual statement of earnings or an official letter detailing your total compensation.
How do U.S. citizens report their wages on Form 1040 without a W-2?
U.S. citizens report their gross compensation on the wage line of Form 1040 (or the appropriate other income line as specified in annual form instructions) and attach Schedule SE to compute their self-employment tax.
Can a green card holder earn Social Security credits while working for an embassy?
Generally, no. Because the employer does not pay FICA and green card holders are exempt from self-employment tax on these earnings, no Social Security contributions are deposited into the individual’s record for this work.
What happens if I sign USCIS Form I-508?
When you sign Form I-508 to receive or maintain a green card, you waive your statutory tax exemption under U.S. internal tax law. However, if you are employed by an international organization whose founding charter provides an unconditional exemption for all noncitizens, that charter exemption may still protect your salary from U.S. income tax.
When are estimated tax payments due for employees in this sector?
Estimated tax payments are submitted quarterly using Form 1040-ES. The standard due dates for each tax year are April 15, June 15, September 15, and January 15 of the following year (or the next business day if a deadline falls on a weekend or holiday).
10. Conclusion
Working for an embassy, consulate, or international organization offers unique professional experiences, but it introduces distinct U.S. tax responsibilities. Without traditional employer withholding, the burden of calculating taxes, tracking immigration exemptions, and submitting quarterly estimated payments rests entirely on your shoulders.
By reviewing IRS Publication 6120 and staying aware of your specific classification as a citizen, green card holder, or foreign diplomat, you can maintain full tax compliance, prevent underpayment penalties, and avoid unexpected tax bills at filing time.
