September is a critical month for J-1 visa holders thinking ahead about taxes. If you worked in the U.S. on a J-1 visa and received a W-2 from your employer, you’re probably wondering what you need to do right now—before the year ends, before tax season arrives, before the pressure builds. This guide walks through exactly what September means for your J-1 tax situation, what deadlines matter this month, and what preparation actually moves you forward.

What does September mean for J-1 tax filing?

September itself has no federal tax filing deadline—those come in April and beyond. Instead, September is your last quarter of the year to wrap up work, confirm your documents, and get organized for filing season that starts early next year. If you’re nearing the end of your J-1 assignment, this is the month to ensure your W-2 details are correct, check your withholding, and start thinking about whether you’ll owe or get a refund.

The variables that shape your September actions

What you actually do in September depends on three things: your J-1 category (student, teacher, trainee, intern, camp counselor, or specialist), how long you’ve been in the U.S. during this and prior years, and whether your home country has a tax treaty with the U.S. These factors decide whether you file Form 1040-NR (nonresident alien) or Form 1040 (resident alien), and whether you owe FICA taxes or can claim an exemption.

Your J-1 category matters because it changes your residency test window. If you’re a student, you can exclude your U.S. presence from the Substantial Presence Test for up to five calendar years; if you’re a teacher, trainee, intern, camp counselor, or specialist, you can exclude only two of the last six calendar years (extendable to four in certain cases). Once you hit that limit, the test kicks in and you may become a resident alien—which changes your form, your withholding, and your refund calculation.

Your prior time in the U.S. narrows your runway. If this is your first September on a J-1, you’re likely still in the early part of your non-resident window. If you’re returning for a second or third year, your exclusion days are counting down—or may have already expired. September is when you should verify how many calendar years you’ve used up, because once the exclusion ends, everything shifts.

Your home country’s tax treaty affects whether you pay FICA. Most J-1 holders are exempt from Social Security and Medicare withholding in their first year or two if their home country has a treaty with the U.S. That exemption is not automatic—it depends on filing the right form (usually Form 8233) with your employer. If your employer withheld FICA incorrectly, September is when you should flag it and prepare to claim it back on your return.

Where most J-1 workers get September wrong

Misconception 1: “September means I file my taxes now.” You don’t file in September. The IRS opens filing season in early 2026 (check the IRS website for the exact date each year), and you file between then and April. September is prep month, not filing month. Use it to gather documents and check numbers, not to submit.

Misconception 2: “If I’m still on a J-1, I don’t owe FICA.” FICA (Social Security and Medicare) exemption is real for many J-1 holders in their first two years, but it depends on your category and your treaty. Some J-1 categories cannot claim FICA exemption at all, and some home countries don’t have treaties. If your employer withheld FICA and you think you shouldn’t have, use September to get clarity—don’t assume you’re automatically exempt.

Misconception 3: “My residency status doesn’t change if I stay on a J-1.” Your visa status and your tax residency status are not the same thing. You can be on a valid J-1 visa but become a resident alien for tax purposes once your exclusion period ends. According to the IRS, “J-1 aliens who are U.S. resident aliens for the entire taxable year must report their entire worldwide income on Form 1040, U.S. Individual Income Tax Return, in the same manner as if they were U.S. citizens.” September is a good time to run the Substantial Presence Test to check where you stand.

What to do in September

1. Verify your paystubs and W-2 estimate. Request or download every paystub from January through the current month. Add up gross income, federal withholding, and any FICA withholding. If you see FICA (Social Security and Medicare taxes) and you believe you’re exempt, this is the month to ask your employer or HR whether you filed Form 8233.

2. Check your residency status with the Substantial Presence Test. Use the Substantial Presence Test tool to count your U.S. presence days from this year and the last five years. This tool will tell you whether you’re still in your non-resident window or whether you’ve crossed into resident alien status. Your answer shapes your entire filing approach.

3. Gather your visa documents. Collect your DS-2019 (the document from your J-1 sponsor showing your program dates), your I-94 arrival record, your passport stamps, and any letters from your sponsor. These prove your J-1 status and your time in the U.S.—they’re essential for Form 8843 (Statement for Exempt Individuals) and to back up your residency claim.

4. Check for state tax filing requirements. Some U.S. states have income tax and some don’t. If you worked in a state with income tax, you may need to file a state return in addition to your federal return. State deadlines usually follow the federal deadline, but state rules for nonresidents vary—September is when to research or ask your employer which state taxes apply.

5. Confirm your home address and mailing details. The IRS will mail your refund check or any notices to the address on your return. Make sure you have a reliable U.S. address (or a forwarding address) where you can receive mail, or set up direct deposit on your return if your bank account is still open.

Frequently Asked Questions

Do I need to file Form 8843 if I’m still a nonresident?

Yes, in most cases. Form 8843 (Statement for Exempt Individuals) is required if you claim the J-1 visa exemption from the Substantial Presence Test. Filing it proves you’re entitled to nonresident alien status. If you’re a student, teacher, trainee, or other exempt category, your tax preparer will file this form with your return. The form lists your program start and end dates, visa number, and other identification.

What happens if my employer withheld FICA but I’m exempt?

You’ll claim it back on your tax return (Form 1040-NR, Schedule SE or Form 1040, depending on your residency status). The refund amount equals the FICA tax withheld from your paystubs. Run your W-2 and paystubs through the calculator to see your estimated refund—your exact number depends on your gross income and withholding.

Can I file my taxes before April if I finish work in September?

Not before the IRS opens the filing season each year, which is typically early January or early February. You can file early once filing season opens, and many people do file right away to get refunds faster. Check the IRS website in December or January for the exact opening date in 2026.

Does September count as a full month for the Substantial Presence Test?

The test counts days you’re physically present in the U.S., not months. If you work the entire month of September (1st through 30th), that’s 30 days toward the test. Days you leave the country don’t count, and days you’re abroad on a business trip don’t count. The test is day-by-day, so keep track if you travel.

What if I’m still waiting for my W-2 in September?

Your employer is required to issue your W-2 by January 31st of the following year (January 31, 2027 for 2026 income). In September, you don’t have the final W-2 yet, so use your paystubs to estimate. Once you receive your W-2 in January or February, you can file with the official numbers. Don’t wait for the W-2 to prepare—gather your documents and run the numbers now.

This is general information, not personalized tax advice. Your exact situation depends on your visa history and paperwork—use the calculator for a number based on your own details, and consult a qualified tax preparer for anything beyond a standard return.

September isn’t a filing month, but it’s your last chance to prepare before filing season arrives. Verify your paystubs, check your residency status with the Substantial Presence Test, gather your visa documents, and confirm your address. The sooner you organize these details, the faster you’ll move through filing once it’s time. Answer a few quick questions and see your estimated refund with the tax calculator—your real number is just minutes away.