F-1 and OPT Taxes: Why You Shouldn't Pay FICA — and How to Get It Back

Here's the short answer: if you're on F-1 status — including OPT and STEM OPT — and you're still a nonresident alien for tax purposes, you should not be paying Social Security and Medicare (FICA) taxes on your wages. That's 7.65% of every paycheck. Employers get this wrong constantly, especially when an OPT hire goes through the same onboarding system as everyone else, and the money is recoverable.

This post covers why the exemption exists, how to check whether it applies to you, how to get wrongly withheld FICA back, and what changes when your five-year clock runs out or you switch to H-1B. It's one piece of the bigger cross-border picture we lay out in The NRI's Complete Guide to US Taxes.

Why F-1 students are exempt from FICA

The exemption has two layers. First, F-1 students are exempt individuals for the substantial presence test during their first five calendar years in the US. Exempt doesn't mean exempt from tax — it means your days physically in the US don't count toward the residency test. Since you're not counting days, you stay a nonresident alien for tax purposes. The mechanics of that day-counting rule are worth understanding — see our substantial presence test guide with worked examples.

Second, wages paid to nonresident F-1 students for work connected to their status — on-campus jobs, CPT, OPT, STEM OPT — are exempt from FICA. Put together: as long as the five-year exemption keeps you a nonresident, your paycheck should show federal and state income tax withholding, but no Social Security and no Medicare.

Note that the five years are calendar years, not 12-month periods. Arrive in August 2022 and 2022 counts as year one, even though you were only here five months. Your exempt years would be 2022 through 2026.

How to spot the mistake on your paycheck

Pull up a pay stub or your W-2 and look for these:

• Pay stub: lines labeled Social Security, Medicare, FICA, or OASDI with amounts withheld.
• W-2: Box 4 (Social Security tax withheld) and Box 6 (Medicare tax withheld). For an exempt nonresident F-1 worker, both should be zero.

If there are amounts in those boxes and you were a nonresident on F-1 all year, your employer withheld tax you never owed. On a $70,000 OPT salary, that's about $5,355 a year sitting with the IRS.

Getting your FICA back: employer first, then the IRS

The refund path has a required order:

1. Ask your employer first. Email payroll or HR, explain that you're an F-1 nonresident alien exempt from FICA, and ask them to refund the withheld amounts and correct their filings. Employers can recover the money (including their own matching share, which they also didn't owe), so a well-run payroll department will fix it. Keep the email thread — you'll need evidence that you asked.
2. If the employer won't or can't fix it, file Form 843 with the IRS. Form 843 is the refund claim. You attach Form 8316 — a statement that you requested a refund from your employer and couldn't get one — plus copies of your W-2, your visa documentation, and your I-94/I-20 showing F-1 status. This goes to the IRS separately from your income tax return.
3. Wait. FICA refund claims are processed manually and can take many months. It's slow, but it works — file it and move on with your life.

Your income tax return: 1040-NR and the India treaty perk

FICA is only half the story — you still file an income tax return. As a nonresident, that's Form 1040-NR, which taxes only your US-source income. Nonresidents normally get no standard deduction, but Indian students are the big exception: Article 21(2) of the US-India tax treaty lets students from India claim the standard deduction on a 1040-NR — $16,100 for a single filer in 2026. That treaty benefit alone saves Indian students real money every year, and it disappears if you file the wrong form.

Two cautions. Don't use standard consumer tax software defaults — most mainstream products prepare resident 1040s and will happily misfile you as a resident. And don't claim the treaty deduction after you've become a resident filing a 1040; the Article 21(2) benefit is for students filing as nonresidents.

When the exemption ends

The FICA exemption is not permanent. It ends when either of two things happens:

• Your five calendar years run out. From year six, your days start counting toward the substantial presence test. Most students who stay become residents for tax purposes that year — and once you're a resident, FICA applies to your wages even if you're still on F-1/OPT.
• You switch to H-1B. H-1B workers are not exempt individuals, so your days count from the day the status takes effect, and FICA withholding starts immediately regardless of your day count. In the switch year you may be a nonresident, a dual-status alien, or a resident depending on timing — our first-year H-1B tax guide covers how that transition year works and the elections available.

A common trap in the transition: an employer who correctly stopped FICA during OPT sometimes forgets to start it when the H-1B kicks in. That error runs in your favor short-term but creates a real liability — flag it.

The bottom line

Nonresident F-1 students and OPT workers don't owe FICA, and Indian students get the standard deduction on their 1040-NR under the treaty. If FICA was withheld anyway, request a refund from your employer, and file Form 843 with Form 8316 if they don't deliver. Taxagon's CPAs and EAs handle 1040-NRs, treaty positions, and FICA refund claims for students every season — if you'd rather have it done right the first time, our NRI and international student services are here.

This article is general information, not tax advice for your specific situation. Tax law changes; figures are for the years stated.