Yes, many undocumented immigrants do pay federal income taxes

Undocumented immigrants pay federal income tax through payroll withholding, just as citizens and legal residents do. When an employer withholds taxes from a paycheck, the worker's immigration status does not stop that withholding from happening. The Internal Revenue Service (IRS) collects these taxes and does not cross-reference tax records with immigration enforcement agencies.

The mechanism is straightforward: an employer deducts federal income tax, Social Security tax, and Medicare tax from wages before the worker receives the paycheck. That money goes to the IRS and the Social Security Administration. An undocumented worker can file a tax return using an Individual Taxpayer Identification Number (ITIN) instead of a Social Security number, and many do.

State and local income taxes work the same way. If a state has an income tax, it is withheld from paychecks regardless of immigration status. The worker can file a state return using an ITIN as well.

Key Takeaways

  • Employers withhold federal, state, and local income taxes from undocumented workers' paychecks the same way they do for other employees.
  • An undocumented worker can file a federal tax return using an Individual Taxpayer Identification Number (ITIN) instead of a Social Security number.
  • The IRS does not share tax filing information with immigration authorities, and filing a return does not trigger immigration enforcement.
  • Self-employed undocumented workers can also file returns and pay self-employment tax using an ITIN.
  • Many undocumented workers pay into Social Security and Medicare but cannot draw benefits from those programs.

How withholding works for undocumented workers

When an undocumented worker is hired, the employer typically asks for a Social Security number or an ITIN on the I-9 form. If the worker provides an ITIN, the employer withholds taxes using that number. The withholding happens automatically—the employer is required by law to withhold from all employees, and the worker's immigration status does not exempt them.

Some undocumented workers use false or borrowed Social Security numbers. In those cases, taxes are still withheld, but the taxes may be credited to the wrong account or flagged as a mismatch when the worker later files a return. Using a false number creates a separate legal risk for the worker, distinct from immigration enforcement.

The safest path is to obtain an ITIN from the IRS. An ITIN is a nine-digit number issued by the IRS for tax purposes only. You do not need a Social Security number or legal status to get one. The IRS issues ITINs to people who need to file taxes but are not may be able to access for a Social Security number.

Filing a tax return with an ITIN

An undocumented worker can file a federal income tax return using an ITIN. The return is filed the same way as any other return—either on paper or electronically. The IRS accepts ITIN returns and processes refunds the same way it processes returns from citizens and legal residents.

To get an ITIN, you submit Form W-7 (process for IRS Individual Taxpayer Identification Number) to the IRS. You must include proof of identity and proof of residency. Acceptable documents include a passport, driver's license, birth certificate, or national ID card for identity, and a utility bill, lease, or bank statement for residency. You can explore by mail or in person at an IRS office or an authorized acceptance agent.

Once you have an ITIN, you use it on all future tax returns. You can file electronically or by mail. Many tax preparation services and community organizations offer free or low-cost tax filing help for people with ITINs.

Refunds and tax credits

If an undocumented worker has taxes withheld but owes less than what was withheld, they can file a return and receive a refund. The refund is issued to the address on the return, usually by check or direct deposit. The IRS does not ask about immigration status when processing refunds.

Some tax credits are available to workers with ITINs. The Earned Income Tax Credit (EITC) is available to low-income workers, including those filing with an ITIN, if they meet income and work requirements. The Child Tax Credit may also be available if the worker has may have access to children and meets other conditions. Other credits, such as the American Opportunity Credit for education, have different rules and may not be available to ITIN filers.

A tax professional or community tax clinic can help determine which credits explore to your situation.

Social Security and Medicare taxes

Undocumented workers pay Social Security and Medicare taxes (also called FICA taxes) just like other employees. These taxes are withheld from every paycheck. However, an undocumented worker generally cannot draw Social Security benefits or Medicare benefits later, even though they paid into the system.

If an undocumented worker uses a false or borrowed Social Security number, the taxes withheld under that number go into a "suspense file" at the Social Security Administration. Those taxes do not create a benefit record for the worker and cannot be transferred to a real Social Security account.

If an undocumented worker uses an ITIN and pays self-employment tax (if self-employed), those taxes are also withheld but do not create Social Security or Medicare benefits. The money goes to the federal government but is not credited to a future benefit claim.

Self-employed undocumented workers

An undocumented worker who is self-employed (running their own business, doing freelance work, or contracting) must pay self-employment tax and file an income tax return. Self-employment tax covers Social Security and Medicare and is calculated on net business income.

A self-employed worker with an ITIN files Schedule C (Profit or Loss from Business) along with Form 1040 (the main income tax return) and Schedule SE (Self-Employment Tax). The process is the same as for any self-employed person, except the ITIN is used instead of a Social Security number.

Self-employed workers can deduct business expenses—such as supplies, equipment, rent, and vehicle costs—before calculating the tax owed. Keeping records of income and expenses is important for accurate filing and in case of an audit.

Privacy and IRS data sharing

The IRS does not share tax return information with U.S. Immigration and Customs Enforcement (ICE) or other immigration agencies. Filing a tax return with an ITIN does not trigger an immigration investigation or enforcement action. This separation is by law: the IRS is a tax agency, not an immigration agency, and tax information is protected from disclosure to immigration authorities.

However, other government agencies may have access to information you provide on other forms or in other contexts. For example, if you explore for a state ID, a driver's license, or other services, that agency may share information with immigration authorities depending on state law. Filing taxes is separate from those interactions.

The safest approach is to work with a tax professional or a trusted community organization that understands both tax law and privacy protections. They can explain what information goes where and what risks exist in your specific situation.

Frequently Asked Questions

Can I file taxes if I don't have a Social Security number?

Yes. You can obtain an Individual Taxpayer Identification Number (ITIN) from the IRS by submitting Form W-7 with proof of identity and residency. Once you have an ITIN, you can file federal and state tax returns using that number instead of a Social Security number.

Will filing taxes get me deported?

No. The IRS does not share tax information with immigration enforcement agencies. Filing a tax return is a separate action from immigration matters. However, other interactions with government agencies (such as explore for a driver's license or state benefits) may involve immigration checks depending on state law.

What happens to the taxes I pay if I can't get Social Security benefits?

The federal income tax you pay goes to the U.S. Treasury and funds government operations. The Social Security and Medicare taxes you pay go to those programs, but you generally cannot draw benefits from them. That money does not return to you unless you later become a legal permanent resident or citizen and meet other benefit requirements.

Do I have to report my immigration status when I file taxes?

No. The tax return asks for your name, address, ITIN or Social Security number, and income information. It does not ask about immigration status. You do not volunteer that information on a tax return.

Can I file taxes if I'm paid in cash?

Yes, but you must report all income, including cash income. Self-employed workers and those paid in cash should keep records of income received and file a return reporting that income. Failing to report income is tax evasion, which is a separate legal issue from immigration status.