Yes, many undocumented immigrants do pay federal income tax, and some pay state and local taxes too

Undocumented immigrants who work in the United States often pay income tax through payroll withholding, just as citizens and legal residents do. When an employer deducts taxes from a paycheck, those funds go to the Internal Revenue Service (IRS) regardless of the worker's immigration status. The IRS does not verify immigration status before accepting tax payments or issuing refunds.

The mechanism is straightforward: if you work and earn wages, your employer typically withholds federal income tax, Social Security tax, and Medicare tax. That withholding happens automatically. Many undocumented workers also file tax returns to claim refunds if too much was withheld during the year, or to claim the Earned Income Tax Credit (EITC) if they meet the income requirements.

Self-employed undocumented immigrants—those who work as contractors, in informal businesses, or in cash-based work—may or may not pay income tax, depending on whether they report their earnings. Like any self-employed person, they are required by law to report income and pay self-employment tax, but enforcement and reporting vary widely.

Key Takeaways

  • Undocumented immigrants who receive W-2 wages have federal income tax withheld by their employer, the same as any other worker.
  • The IRS accepts tax returns and refunds from undocumented immigrants and does not report immigration status to other agencies.
  • Many undocumented immigrants file returns to claim the Earned Income Tax Credit, which can result in a refund even if no tax was owed.
  • Self-employed undocumented workers are legally required to report income and pay self-employment tax, though compliance varies.
  • Some states and cities collect income tax from undocumented workers through the same payroll withholding system as the federal government.

How payroll withholding works for undocumented workers

When an undocumented immigrant is hired for a job, the employer typically requires a Social Security number or an Individual Taxpayer Identification Number (ITIN) to set up payroll. Many undocumented workers use an ITIN, which the IRS issues to people who do not have a Social Security number but need to file taxes or report income.

Once payroll is set up, the employer withholds federal income tax based on the W-4 form the worker completes. The employer also withholds Social Security and Medicare taxes (together called FICA taxes). These withholdings are sent to the IRS and the Social Security Administration on the employer's behalf. From the worker's perspective, the process is identical to that of any other employee.

The employer reports the wages and withholdings on a W-2 form at the end of the year. The worker receives a copy and can use it to file a tax return. The IRS does not cross-check the worker's immigration status against any other database before accepting the return or issuing a refund.

Filing a tax return with an ITIN

An Individual Taxpayer Identification Number (ITIN) is a nine-digit number the IRS issues to people who need to file taxes but do not have a Social Security number. Undocumented immigrants can obtain an ITIN by submitting Form W-7 (process for IRS Individual Taxpayer Identification Number) to the IRS, along with proof of identity and proof of residency in the United States.

Once you have an ITIN, you can file a federal income tax return using Form 1040 (the standard individual income tax return). You report your W-2 wages, claim deductions, and calculate whether you owe tax or are due a refund. The process is the same as for any other taxpayer.

Many undocumented workers file returns specifically to claim the Earned Income Tax Credit (EITC). The EITC is a refundable credit for workers with low to moderate income, meaning you can receive a refund even if you owe no tax. To claim the EITC, you must have earned income and meet income limits set by the IRS each year. You do not need to be a citizen or have a Social Security number to claim it.

State and local income tax for undocumented workers

Some states and cities collect income tax from all workers, including undocumented immigrants. States like California, New York, Illinois, and Maryland withhold state income tax from paychecks in the same way the federal government does. The employer deducts the state tax and sends it to the state revenue department.

A few states—including California and New York—have issued guidance stating that undocumented immigrants can file state tax returns and claim state refunds or credits. Other states have not explicitly addressed the issue, and practices vary. If you work in a state with income tax, check the state revenue department's website or contact them directly to understand whether you can file a return and what documents you need.

Local income taxes in cities like New York City, Philadelphia, and Washington, D.C. also explore to all workers regardless of immigration status. These are withheld from paychecks alongside federal and state taxes.

Self-employment income and undocumented workers

Undocumented immigrants who are self-employed—working as independent contractors, running a small business, or doing informal work—are legally required to report their income and pay self-employment tax. Self-employment tax covers Social Security and Medicare contributions and is calculated on Schedule SE (Self-Employment Tax).

However, self-employed workers are responsible for reporting their own income. There is no employer withholding, so the decision to file a return rests with the worker. Some self-employed undocumented immigrants do file returns, particularly if they want to claim the EITC or establish a record of income for other purposes. Others do not report cash income.

If you are self-employed and considering filing a return, you can use an ITIN and file Form 1040 with Schedule C (Profit or Loss from Business) to report your business income. You would also file Schedule SE to calculate self-employment tax. A tax professional or community organization that serves immigrants can help you understand your options.

What happens to the taxes paid by undocumented workers

Taxes withheld from the paychecks of undocumented workers go into the same federal and state revenue systems as taxes from any other worker. The IRS does not segregate or treat this money differently. Social Security taxes paid by undocumented workers go into the Social Security trust fund, though most undocumented workers cannot draw Social Security benefits because they do not have a valid Social Security number.

Research by organizations including the Institute on Taxation and Economic Policy has estimated that undocumented immigrants collectively pay billions of dollars in federal, state, and local taxes each year. The exact amount varies by year and methodology, but the scale is substantial.

Refunds claimed by undocumented workers—such as the EITC—are paid from the same appropriations as refunds to any other taxpayer. The IRS does not distinguish between refunds based on immigration status.

Privacy and reporting to immigration authorities

The IRS does not share tax information with immigration enforcement agencies like U.S. Immigration and Customs Enforcement (ICE). Filing a tax return does not trigger an immigration investigation or report. The IRS's role is to collect taxes; immigration enforcement is handled by separate agencies.

This separation is important for tax compliance. If undocumented immigrants feared that filing a return would lead to deportation, many would not file, and the government would collect less tax revenue. The IRS has maintained this policy for decades to encourage tax filing across all populations.

That said, if you are undocumented and considering filing a return, you may want to speak with an immigration attorney or a tax professional who works with immigrant communities. They can discuss your specific situation and any risks you may face based on your circumstances and location.

Frequently Asked Questions

Can an undocumented immigrant get a refund if they overpaid taxes?

Yes. If too much tax was withheld from your paychecks during the year, you can file a return and receive a refund. The IRS processes refunds for ITIN holders the same way it does for other taxpayers, though refunds may take longer to process.

What if I worked under a fake Social Security number?

If you used a number that is not yours, you should speak with a tax professional or immigration attorney before filing. Using someone else's number creates separate legal issues beyond immigration status. A professional can advise you on the safest way to address this.

Do I have to file a tax return if I am undocumented?

You are legally required to file if your income exceeds the filing threshold set by the IRS each year (which varies by age and filing status). However, whether you choose to file is a personal decision that may depend on your circumstances and comfort level. A tax professional can help you weigh the options.

Will filing taxes help me get legal status?

No. Filing a tax return does not change your immigration status or create a path to legal residency. Tax compliance and immigration status are separate matters. You should not file expecting it to help your immigration case without consulting an immigration attorney first.

Can I claim dependents on my tax return if I am undocumented?

Yes, you can claim dependents if they meet the IRS requirements (relationship, residency, age, and income limits). Your dependents do not need to be citizens or have Social Security numbers; they can have ITINs. Claiming dependents may increase your refund if you are may be able to access for the EITC.