Do non-resident ITIN holders get an automatic filing extension?

Yes. Non-resident aliens living outside the US without US wages subject to withholding automatically get until June 15, 2026 to file. No form is required for this extension. Attach a statement to your return explaining you qualify for the 2-month automatic extension. Interest on unpaid tax still accrues from April 15.

When is Form W-7 due?

There is no specific deadline for Form W-7 itself, but it must be filed before or with your tax return. If you are attaching Form W-7 to your tax return, both are due by your filing deadline (April 15 or June 15). For reason codes other than 6a (filing a tax return), W-7 can be submitted at any time during the year.

What is the penalty for filing taxes late with an ITIN?

If you owe tax and file late, the failure-to-file penalty is 5% of unpaid tax per month, up to 25%. The failure-to-pay penalty is 0.5% per month, up to 25%. Both penalties run concurrently. Interest accrues from the original due date (April 15) at the federal short-term rate plus 3%. If you do not owe tax, there is no penalty for late filing.

When is Form 5472 due for foreign-owned LLCs?

Form 5472 is due with the pro-forma Form 1120 by March 15, 2026 for calendar-year filers. You can extend to September 15, 2026 by filing Form 7004 before March 15. The $25,000 penalty for non-filing applies per form, per year. This deadline is earlier than the individual tax return deadline.

When does my ITIN expire?

Your ITIN expires if you do not use it on a federal tax return for 3 consecutive years. The IRS also expires ITINs on a rolling schedule based on middle digits. For 2026, ITINs with middle digits 70-88 that have not been used since 2019 are expired. Check your expiration status and renew before filing to avoid return rejection.

When should I renew an expired ITIN?

Renew your ITIN as early as possible before your filing deadline. The IRS processes renewal applications in 7 to 11 weeks. If your ITIN expired and you need to file by April 15, submit your renewal Form W-7 by January to allow processing time. You can also submit the renewal with your tax return, but this delays return processing.

Is there a deadline to claim a tax refund with an ITIN?

Yes. The IRS has a 3-year statute of limitations on refund claims under IRC Section 6511. You must file your return within 3 years of the original due date to claim a refund. For tax year 2022 with an April 15, 2023 due date, you must file by April 15, 2026 to claim any refund. After 3 years, the refund is forfeited.

When are estimated tax payments due for ITIN holders?

Estimated tax payments follow the same quarterly schedule as SSN holders: Q1 by April 15, Q2 by June 15, Q3 by September 15, and Q4 by January 15 of the following year. Non-resident aliens with effectively connected income may need to make estimated payments. Use Form 1040-ES (NR) to calculate and submit payments.

What if April 15 falls on a weekend or holiday?

If April 15 falls on a weekend or federal holiday, the deadline shifts to the next business day. In 2026, April 15 is a Wednesday, so the deadline is April 15, 2026 with no adjustment. The same rule applies to all other fixed deadlines (June 15, October 15, March 15). Check the IRS website each year for specific dates.

Updated April 2026

ITIN Tax Deadlines 2026: Every Filing Date You Need to Know

ITIN holders face 8 distinct tax deadlines throughout 2026. Missing deadlines triggers penalties of 5% per month for late filing and 0.5% per month for late payment. Non-resident aliens get an automatic extension to June 15. Foreign-owned LLCs must file Form 5472 by March 15 with a $25,000 penalty for non-filing. Estimated tax payments are due quarterly. This guide covers every deadline with the exact 2026 dates, applicable forms, and penalty amounts.

What Are All the ITIN Tax Deadlines in 2026?

Here is the complete calendar of every ITIN-related deadline for the 2025 tax year filing in 2026.

Date	Deadline	Penalty for Missing
January 15, 2026	Q4 2025 estimated tax payment (Form 1040-ES NR)	Underpayment penalty + interest
January 31, 2026	Employers issue Form W-2 and 1099 to ITIN holders	N/A (employer obligation)
March 15, 2026	Form 5472 + pro-forma Form 1120 (foreign-owned LLCs)	$25,000 per form
April 15, 2026	Standard tax return deadline (Form 1040-NR or 1040)	5%/month late filing + 0.5%/month late payment
April 15, 2026	Q1 2026 estimated tax payment	Underpayment penalty + interest
April 15, 2026	Form 4868 extension request deadline	N/A (extends to Oct 15)
June 15, 2026	Auto extension for NRAs without US wage withholding	5%/month after June 15 + interest from Apr 15
June 15, 2026	Q2 2026 estimated tax payment	Underpayment penalty + interest
September 15, 2026	Q3 2026 estimated tax payment	Underpayment penalty + interest
September 15, 2026	Extended Form 5472 deadline (if Form 7004 filed)	$25,000 per form
October 15, 2026	Extended tax return deadline (if Form 4868 filed)	5%/month after Oct 15 + interest from Apr 15

What Happens on April 15, 2026 for ITIN Holders?

April 15 is the most important date on the ITIN tax calendar. Three obligations converge on this date:

Tax return due. File Form 1040-NR or Form 1040 for the 2025 tax year. ITIN holders with US wages subject to withholding must file by this date.
Tax payment due. Pay any tax owed for 2025. Even if you request an extension to October 15, the payment is due April 15. Estimate and pay to avoid the 0.5% per month late-payment penalty.
Extension request due. File Form 4868 by April 15 to extend your filing deadline to October 15. The form is simple — enter your ITIN, estimated tax, and payment amount.

Who Qualifies for the June 15 Automatic Extension?

Non-resident aliens living outside the US without US wages subject to withholding get an automatic 2-month extension to June 15. No form is required. You qualify if you meet both conditions:

You are a non-resident alien (did not meet the substantial presence test)
You did not receive US wages subject to income tax withholding

This automatic extension applies to most ITIN holders who earn only passive income (dividends, interest, royalties, rental income). Attach a statement to your return explaining you qualify for the 2-month extension under IRC Section 6081.

Important:

The June 15 extension is for filing only, not for payment. Interest on any unpaid tax accrues from April 15, even if you file by June 15. Estimate and pay your tax liability by April 15 to minimize interest charges.

Why Is March 15 Critical for Foreign-Owned LLCs?

March 15 is the due date for Form 5472 and the pro-forma Form 1120 for foreign-owned US LLCs. This deadline is 30 days earlier than the individual tax return deadline. Missing it triggers the $25,000 penalty.

If you need more time, file Form 7004 before March 15 to extend the deadline to September 15, 2026. Form 7004 is a simple one-page extension request. It does not require payment or detailed financial information.

This deadline applies even if your LLC had no income or transactions during the year. The filing obligation is triggered by foreign ownership status, not by business activity.

When Should You File Form W-7 for an ITIN?

Form W-7 has no fixed deadline, but timing matters based on your reason for applying.

Reason 6a (filing a tax return): Submit Form W-7 with your tax return by your filing deadline. The IRS processes the W-7 first (7-11 weeks), assigns your ITIN, then processes your return.
Reason 6b (treaty benefits): Submit Form W-7 whenever you need to claim treaty benefits on Form W-8BEN. No tax return attachment required.
Renewal: Submit as early as possible before your filing deadline. Processing takes 7-11 weeks. If filing by April 15, submit renewal by January at the latest.

What Penalties Apply for Missing ITIN Tax Deadlines?

Here is a summary of all penalties ITIN holders may face for missed deadlines.

Violation	Penalty	Maximum
Late filing (Form 1040-NR)	5% of unpaid tax per month	25%
Late payment	0.5% of unpaid tax per month	25%
Form 5472 non-filing	$25,000 per form per year	No cap
Form 8833 non-disclosure	$1,000 per position	No cap
Underpayment of estimated tax	Interest at federal rate + 3%	Varies
Late filing when no tax owed	$0	$0

Frequently Asked Questions About ITIN Tax Deadlines

The standard deadline is April 15, 2026 for ITIN holders with US wages subject to withholding. Non-resident aliens without US wage withholding get an automatic extension to June 15, 2026 with no form required. You can extend further to October 15, 2026 by filing Form 4868 before your original due date.

Need an ITIN before tax deadlines? Apply through our CAA service starting at $297. Processing takes 7 to 11 weeks.

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