Who Needs to File Form 1040-NR? A 2026 Guide for Nonresidents and Foreign LLC Owners

If you’re not a U.S. citizen or resident but you earn money from the United States, you may need to file Form 1040-NR, the U.S. Nonresident Alien Income Tax Return. Many foreign owners of U.S. LLCs aren’t sure whether this applies to them, especially when they already file Form 5472 for their company.

This guide explains who needs to file Form 1040-NR, when it’s due, what income it covers, and how it fits with your LLC’s filings, in plain English.

Key Takeaways

• Form 1040-NR is the personal income tax return for nonresident aliens with U.S. income or U.S. business activity.

• It is separate from your LLC’s Form 5472 and pro forma Form 1120. You may need to file both.

• The deadline is April 15, 2026 if you received U.S. wages with tax withheld, or June 15, 2026 if you didn’t.

• You need an SSN or ITIN to file.

What Is Form 1040-NR and Who Needs to File It?

Form 1040-NR is the federal income tax return for individuals who are nonresident aliens for U.S. tax purposes, meaning people who don’t hold a green card and don’t meet the substantial presence test.

In general, you need to file Form 1040-NR if, during the tax year, you were a nonresident alien and any of these apply:

• You were engaged in a trade or business in the United States, even if you had no income from it, or your income is exempt under a tax treaty

• You had U.S.-source income (such as rent, dividends, or royalties) and the full tax due wasn’t withheld

• You want to claim a refund of U.S. tax that was over-withheld

• You want to claim deductions or credits against U.S. income

You may also file as the representative of a deceased nonresident or on behalf of a nonresident estate or trust.

Do Foreign LLC Owners Need to File Form 1040-NR?

This is the most common question we hear. The answer depends on what your LLC does and where the work happens.

A single-member LLC owned by a foreign person is usually a disregarded entity. That means the IRS treats the LLC’s income as your personal income. The LLC itself files Form 5472 with a pro forma Form 1120 (see our guide on Foreign-Owned LLC Tax Requirements), but income tax is handled on your return.

When a Foreign LLC Owner Usually Needs Form 1040-NR

• The LLC has effectively connected income (ECI), for example from a U.S. office, U.S. employees, U.S. inventory or warehouse, or a dependent agent working in the U.S.

• You personally performed services inside the U.S.

• The LLC earned U.S.-source passive income, such as U.S. rental income, and tax wasn’t fully withheld

When a Foreign LLC Owner May Not Need Form 1040-NR

• You run the business entirely from outside the U.S., with no U.S. office, staff, or agent

• The LLC has no U.S.-source income and no U.S. trade or business

⚠️ Important: Even if you don’t need Form 1040-NR, your LLC still files Form 5472 every year if it had reportable transactions. Whether your income counts as ECI depends on your facts, so it’s worth a professional review before deciding not to file.

Form 1040-NR at a Glance

Form 1040-NR Due Dates for 2026

• April 15, 2026: if you were an employee and received U.S. wages subject to income tax withholding

• June 15, 2026: if you didn’t receive wages subject to withholding (this applies to most foreign LLC owners)

• Extension: file Form 4868 by the original due date for an extra six months. An extension gives you more time to file, not to pay.

What Income Is Reported on Form 1040-NR?

Form 1040-NR separates your U.S. income into two types.

Effectively Connected Income (ECI)

Income connected with a U.S. trade or business, such as business profits or wages for work done in the U.S. ECI is taxed at the same graduated rates as U.S. citizens, and you can generally claim related business deductions. Business income from a disregarded LLC is usually reported on Schedule C.

Fixed or Periodic Income (FDAP)

Passive U.S.-source income such as dividends, interest, rents, and royalties that isn’t connected to a U.S. business. It’s reported on Schedule NEC and taxed at a flat 30%, or a lower rate if a tax treaty applies.

What You Need Before You File Form 1040-NR

• SSN or ITIN: if you don’t have an SSN, you need an ITIN. You can apply with Form W-7 together with your return. (Apply for an ITIN)

• Income records: Forms W-2, 1042-S, or 1099, plus your LLC’s profit and loss statement

• Schedule OI details: your country of citizenship, visa type (if any), days spent in the U.S., and any tax treaty you’re claiming

• Your LLC’s EIN, if you’re reporting LLC business income (see How to Get an EIN for a Non-Resident LLC)

How to File Form 1040-NR

You can file electronically through software or a tax professional that supports Form 1040-NR, or by mail:

• Without payment: Department of the Treasury, Internal Revenue Service, Austin, TX 73301-0215, USA

• With payment: Internal Revenue Service, P.O. Box 1303, Charlotte, NC 28201-1303, USA

Tip: Check the IRS “Where to File” page before mailing, since addresses can change.

Common Form 1040-NR Mistakes to Avoid

• Filing Form 1040 instead of 1040-NR. Nonresidents must use Form 1040-NR.

• Claiming the standard deduction. Most nonresidents can’t claim it (a narrow treaty exception exists, mainly for certain students from India).

• Choosing the wrong filing status. Nonresidents generally can’t file jointly. The main options are single or married filing separately.

• Thinking Form 5472 replaces Form 1040-NR. They are different returns for different purposes.

• Filing late. Besides penalties and interest, nonresidents who don’t file on time may lose the right to claim deductions against effectively connected income.

Get Help Filing Form 1040-NR

Not sure whether you need to file, or how your LLC income should be reported? Our team prepares Form 1040-NR for nonresidents for a flat $199, and we also handle your LLC’s Form 5472 and pro forma 1120 and ITIN applications, all in one place.

👉 Order Form 1040-NR filing or contact our team.