When is the 2026 tax filing deadline for ITIN holders?

The standard deadline is April 15, 2026, for the 2025 tax year. Non-residents who did not receive wages subject to US withholding get an automatic extension to June 15, 2026. You can file Form 4868 for an additional extension to October 15, 2026. ITIN renewal applications should be submitted by October to avoid processing delays during peak tax season.

Do ITIN holders pay US taxes?

ITIN holders pay US taxes on US-source income only. This includes rental income from US property, business income from a US LLC, wages from US employers, and investment income from US sources. Non-residents do not pay tax on foreign-source income. Tax rates for non-residents range from 10% to 37% depending on income level and type.

What is Form W-7 and when do I file it?

Form W-7 is the IRS application for an Individual Taxpayer Identification Number. You file it when you need an ITIN for the first time or when renewing an expired ITIN. Form W-7 is typically submitted with your federal tax return (Form 1040-NR) unless you qualify for an exception such as withholding on passive income or tax treaty benefits.

How do tax treaties affect ITIN holders?

The US has tax treaties with 66 countries that can reduce or eliminate withholding taxes on income like dividends, interest, royalties, and pensions. For example, the US-UK treaty reduces dividend withholding from 30% to 15%. The US-India treaty reduces royalty withholding from 30% to 15%. You claim treaty benefits by filing Form W-8BEN with the income payer and reporting on Form 1040-NR.

What is CP565 and what do I do with it?

CP565 is the IRS notice that contains your newly assigned ITIN. You receive it by mail 7-11 weeks after the IRS approves your W-7 application. Keep CP565 in a safe place because you need your ITIN for tax filing, bank account opening, and other financial activities. If you lose it, you can request a replacement by calling the IRS at 1-800-829-1040.

Do ITIN holders need to file Form 5472?

Yes, if you are a foreign owner of a US single-member LLC. Form 5472 reports transactions between the LLC and its foreign owner, including capital contributions, loans, and distributions. The penalty for not filing Form 5472 is $25,000 per form per year. It must be filed annually with Form 1120 even if the LLC had no income.

Can ITIN holders claim tax refunds?

Yes. If your US employer or income payer withheld more tax than you owe, you file Form 1040-NR to claim a refund. Common situations include excess withholding on wages, over-withholding on scholarship income for international students, and treaty-based reductions. Refunds are processed within 6-8 weeks of filing and can be direct deposited to your US bank account.

What is Form SS-4 and how does it relate to my ITIN?

Form SS-4 is the IRS application for an Employer Identification Number (EIN). Your ITIN identifies you personally; your EIN identifies your business. If you form a US LLC, you need both: the ITIN for personal tax obligations and the EIN for business tax filing, bank account opening, and hiring employees. Non-residents apply for an EIN by mail or fax, which takes 4-6 weeks.

How much does it cost to file taxes with an ITIN?

Filing costs vary. DIY filing with IRS Free File costs $0 if your income is under $84,000. Tax preparation software (TurboTax, H&R Block) costs $50-$200 for non-resident returns. A CPA specializing in non-resident taxes charges $300-$800 per return. Form 5472 preparation adds $200-$500 due to complexity. The IRS charges $0 to process your return.

Updated April 2026

ITIN Tax Guide 2026: Filing, Forms, Deadlines & Treaty Info

Tax compliance is the primary reason ITINs exist. The IRS created the ITIN system in 1996 so non-residents and others without SSNs could meet their US tax obligations. This hub covers every tax form, deadline, and filing requirement relevant to ITIN holders in 2026. Whether you need to file Form 1040-NR, understand tax treaty benefits, or figure out which forms your LLC requires, this page links to the detailed guide you need.

What Tax Forms Do ITIN Holders Need to Know?

Six IRS forms are directly relevant to ITIN holders. Each serves a different purpose in the tax compliance process.

Form	Purpose	Who Files	Guide
W-7	ITIN application/renewal	All ITIN applicants	W-7 Guide
1040-NR	Non-resident tax return	Non-residents with US income	1040-NR Guide
W-8BEN	Treaty benefit claim / withholding reduction	Non-residents receiving US income	W-8BEN Guide
5472	Foreign-owned LLC reporting	Foreign owners of US LLCs	5472 Guide
SS-4	EIN application	Business owners	SS-4 Guide
CP565	ITIN assignment notice	IRS sends to approved applicants	CP565 Guide

How Does Tax Filing Work for ITIN Holders in 2026?

ITIN holders file taxes on US-source income only. The process follows 5 steps from gathering documents to receiving your refund or paying your balance.

Gather income documents. Collect W-2s, 1099s, K-1s, and any other income statements from US sources. Your employer or payer sends these by January 31 each year.
Determine your filing form. Non-residents use Form 1040-NR. LLC owners also file Form 1120 with Form 5472 attached.
Apply treaty benefits if eligible. Check the US tax treaty guide to see if your country has a treaty that reduces withholding rates on dividends, interest, or royalties.
File by the deadline. April 15 for wage earners, June 15 for non-residents without wages. Extension to October 15 available with Form 4868.
Pay or receive refund. Pay any balance due electronically or by check. Refunds are direct deposited to your US bank account within 6-8 weeks of filing.

For detailed filing instructions, see our ITIN tax filing guide and ITIN tax return walkthrough.

What Are the 2026 Tax Deadlines for ITIN Holders?

Deadline	Date	Who
Standard filing deadline	April 15, 2026	All ITIN holders with US wages
Non-resident auto extension	June 15, 2026	Non-residents without US wages
Extended filing deadline	October 15, 2026	Anyone who filed Form 4868
ITIN renewal (recommended)	October 1, 2026	Expired ITINs (unused 3+ years)
Form 5472 deadline	April 15, 2026	Foreign-owned US LLCs

Important:

Missing the Form 5472 deadline triggers a $25,000 penalty per form. If you own a US LLC as a foreign person, this filing is mandatory every year even if the LLC earned zero income. See our Form 5472 guide for instructions.

How Do Tax Treaties Benefit ITIN Holders?

The United States has income tax treaties with 66 countries. These treaties can reduce withholding tax rates on dividends, interest, royalties, and pensions paid to non-residents. Without a treaty, the default US withholding rate is 30% on most passive income.

Common treaty benefits include reduced dividend withholding (15% instead of 30% for many countries), reduced royalty withholding (10-15% instead of 30%), and exemptions for certain types of pension income. You claim treaty benefits by providing Form W-8BEN to the income payer and reporting the treaty claim on your Form 1040-NR.

For a complete list of treaty countries and their specific rates, see our ITIN tax treaty guide.

What Is the Difference Between ITIN, SSN, EIN, and TIN?

TIN (Taxpayer Identification Number) is the umbrella term for all tax ID numbers issued by the IRS. There are 3 types of TINs:

SSN (Social Security Number): Issued to US citizens and authorized workers. Used for employment, Social Security benefits, and tax filing.
ITIN (Individual Taxpayer Identification Number): Issued to individuals who need a US tax ID but are not eligible for an SSN. Used for tax filing and financial services.
EIN (Employer Identification Number): Issued to businesses for tax filing, hiring, and banking. Applied for via Form SS-4.

For detailed comparisons, see ITIN vs TIN, ITIN vs SSN, ITIN vs EIN, and ITIN vs SSN vs EIN three-way comparison.

How Do You Apply for an ITIN for Tax Purposes?

The ITIN is primarily a tax document. You apply by submitting Form W-7 to the IRS along with your federal tax return and identity documents. The IRS processes applications in 7-11 weeks and sends your ITIN via CP565 notice.

Using a Certifying Acceptance Agent (CAA) like itin.so protects your passport and reduces errors. itin.so offers Standard service at $297 (7-10 day preparation) and Express at $297 (2-3 day preparation) with a money-back guarantee.

Learn about application options: DIY vs service | CAA vs mail | Cost guide | Processing times

What Other ITIN Resources Are Available?

ITIN Banking Hub — Open bank accounts with your ITIN
ITIN Mortgage Hub — Home loans for ITIN holders
All ITIN Guides — Master resource page
ITIN for LLC Owners — Business formation and taxes
ITIN for Non-Residents — Complete non-resident guide

ITIN Taxes: Frequently Asked Questions

ITIN holders typically file Form 1040-NR (nonresident income tax return) if they earned US-source income. LLC owners with foreign ownership must also file Form 5472 (information return) and Form 1120 annually. If you receive payments subject to withholding, the payer files Form W-8BEN on your behalf. Form W-7 is used to apply for or renew your ITIN.

Need an ITIN for tax filing? Apply through itin.so with CAA certification starting at $297.

Apply for Your ITIN Today