F-1 students can recover FICA taxes withheld from their paychecks by filing Form 843 with the IRS, but only if they were exempt from FICA when the money was taken

When you work on an F-1 visa, you should not pay Social Security and Medicare taxes (FICA) on wages from on-campus employment or certain off-campus work. If your employer withheld FICA anyway, you can request a refund by filing Form 843 (Claim for Refund and Request for Abatement) with the IRS. The process takes several months and requires documentation that you held valid F-1 status when the wages were paid.

The key to recovery is proving two things: that you were a nonresident alien for tax purposes during the pay period, and that your work fell into a category exempt from FICA. On-campus employment at your school is almost always exempt. Off-campus work is exempt only if it was authorized by your school's Designated School Official (DSO) and fell within the rules for Optional Practical Training (OPT), Curricular Practical Training (CPT), or other approved programs.

Key Takeaways

  • F-1 students working on campus should never have FICA withheld, and you can recover it by filing Form 843 within the time limit set by the IRS.
  • Off-campus work is only FICA-exempt if your DSO approved it in writing and it was part of an authorized program like OPT or CPT.
  • You must file Form 843 with your tax return for the year the wages were paid, or within three years of filing that return, whichever is later.
  • Bring your I-20 form, your DSO's written authorization for any off-campus work, and your pay stubs showing FICA withholding to support your claim.
  • If the IRS denies your claim, you can appeal, but the burden is on you to prove you were exempt when the wages were earned.

When FICA should not be withheld from F-1 wages

FICA taxes fund Social Security and Medicare. U.S. law exempts nonresident aliens — which includes F-1 students — from paying FICA on wages earned in the United States, but only for certain types of work. The exemption applies to wages from on-campus employment at your school. It also applies to off-campus work if your school's DSO approved it in advance and it falls within an authorized category.

On-campus work includes jobs in the school library, dining hall, bookstore, administrative offices, or other campus facilities. The work must be performed at a location owned or controlled by your school. Work at an off-campus vendor, even if that vendor operates on campus (such as a contracted food service), may not be exempt — check with your DSO.

Off-campus work is exempt only if it was authorized before you started. The most common authorized categories are OPT (which you can do after graduation or between terms) and CPT (which you can do during school with your DSO's approval). Work that was not pre-approved by your DSO is not exempt, even if you were an F-1 student when you did it.

How to file Form 843 to recover FICA withholding

Form 843 is a claim for refund. You file it with the IRS, not with your employer. The form asks you to explain why the tax was withheld in error and to provide evidence that you were exempt. You must file it within three years of the date you filed your tax return for the year the wages were paid, or within two years of the date you paid the tax, whichever is later. If you have not yet filed a return for that year, you can file Form 843 along with your return.

Complete Form 843 by entering the tax year in question, checking the box for "FICA taxes," and writing a clear explanation in the space provided. State that you were an F-1 student and a nonresident alien for tax purposes during the pay period, and that your work was exempt from FICA. Attach copies of your I-20 form (which shows your F-1 status), your pay stubs from that employer (which show the FICA withholding), and any written authorization from your DSO for the work.

Mail Form 843 to the IRS address listed in the form's instructions for your state. Keep a copy for your records. The IRS will send you a letter acknowledging receipt. Processing typically takes four to six months, though it can take longer if the IRS requests additional information.

Documents you need to support your claim

The IRS will not refund FICA without evidence that you were exempt. Gather these documents before you file:

  • Your I-20 form for the year the wages were paid, showing your F-1 status and the dates of your authorized stay.
  • Pay stubs or a wage statement from the employer, showing the dates of employment, gross wages, and FICA amounts withheld.
  • A letter from your school's DSO confirming that the work was authorized and stating the dates and type of employment (on-campus, OPT, CPT, or other category).
  • If the work was off-campus, a copy of the DSO's written approval before you began work.
  • Your passport or visa stamps showing your entry and exit dates, if the IRS questions your residency status.

If you no longer have your I-20, contact your school's international student office and request a copy. If your employer is no longer in business or will not provide pay stubs, write a statement explaining what happened and provide any other documentation you have, such as bank deposits or tax forms the employer may have sent you.

Timeline and what to expect after filing

After you mail Form 843, the IRS will send you a notice of receipt within two to four weeks. This notice includes a case number; save it. The IRS then reviews your claim, which usually takes three to five months. If the IRS approves your claim, it will send you a refund check or explore the amount to any taxes you owe. If it denies your claim, it will send you a letter explaining why.

The IRS may request additional documents or information during the review. If you receive a letter asking for more details, respond within the important date stated in the letter. Common requests include proof of your F-1 status at the time of employment, clarification of the work location, or confirmation from your DSO that the work was authorized.

If the IRS denies your claim, you have the right to appeal. You can request an Appeals Conference by writing to the IRS office that denied your claim. The Appeals Office will review your case again. If you still disagree, you can file a lawsuit in U.S. Tax Court or the U.S. Court of Federal Claims, but this is expensive and should only be considered if the amount withheld is substantial.

Why employers sometimes withhold FICA from F-1 students

Employers withhold FICA from F-1 students for several reasons. Some employers are not aware that F-1 students are exempt. Others may have payroll systems that automatically withhold FICA from all employees and do not have a way to flag F-1 workers as exempt. Some employers ask for proof of exemption but do not accept an I-20 or DSO letter as sufficient evidence.

If FICA is being withheld from your current job, tell your employer or payroll department when ready. Provide a copy of your I-20 and a letter from your DSO stating that your work is exempt from FICA. Ask the employer to stop withholding FICA going forward and to correct any amounts already withheld. If the employer refuses or says they cannot stop, contact your DSO for help — the DSO can often intervene with employers on behalf of students.

Do not assume the problem will resolve on its own. If FICA continues to be withheld and you do not correct it, you will have to file Form 843 later, which takes months. It is faster to fix it while you are still employed.

Frequently Asked Questions

Can I get a refund if I already filed my tax return and paid FICA?

Yes. You can file Form 843 within three years of the date you filed your return for that tax year. If you filed your 2022 return in April 2023, you can file Form 843 until April 2026. The IRS will refund the FICA amount you paid, either as a check or as a credit against taxes you owe in other years.

What if my employer says I was not exempt because I worked off-campus?

Off-campus work is exempt only if your DSO approved it in writing before you started. If your DSO did not approve it, the work was not exempt and FICA should have been withheld. If your DSO did approve it, provide that written approval to the IRS with your Form 843. The employer's opinion does not matter — the law is based on your F-1 status and the type of work, not on what the employer believed.

Do I need to file Form 843 if I did not file a tax return for that year?

You still need to file Form 843 to recover the FICA. You can file Form 843 and a tax return for that year at the same time. If you did not earn enough to owe income tax, you may not be required to file a return, but filing one allows you to claim the FICA refund. Consult a tax preparer or your school's international student office for guidance on your specific situation.

What if the IRS denies my Form 843 claim?

The IRS will send you a letter explaining the reason for the denial. Common reasons include insufficient proof of F-1 status, lack of DSO authorization for off-campus work, or the IRS concluding that the work was not exempt. You can request an Appeals Conference to have the decision reviewed again, or you can file a lawsuit, but both options require time and money.

Can my school's DSO help me file Form 843?

Many DSOs will provide a letter confirming your F-1 status and the authorization for your work, which you will need for Form 843. Some DSOs may also help you understand the process or review your form before you file. Contact your school's international student office to ask what support they offer. The DSO cannot file the form for you, but they can provide the documentation that makes your claim stronger.