ITIN Registration: Frequently Asked Questions

Introduction

An Individual Taxpayer Identification Number (ITIN) is a nine-digit tax processing number issued by the Internal Revenue Service (IRS). It is intended for individuals who need a U.S. taxpayer identification number for federal tax purposes but are not eligible for a Social Security Number (SSN).

The term ITIN registration is commonly used for the process of obtaining an ITIN, although the IRS technically treats it as an application made through Form W-7. Applicants must establish a federal tax purpose and provide acceptable documents proving identity and foreign status.

For a detailed understanding of the application form, read our guide on Form W-7 for ITIN Application.

These FAQs on ITIN registration address technical issues involving Form W-7, tax return exceptions, foreign-owned LLCs, document certification, ITIN expiry, IRS notices and applications made from outside the United States.

What Is ITIN Registration and Who Needs an ITIN?

ITIN registration commonly refers to applying for an Individual Taxpayer Identification Number through the IRS. An ITIN is used for federal tax administration and does not provide immigration status, employment authorization or Social Security benefits.

An ITIN may be required by certain nonresident aliens, resident aliens and other eligible individuals who have a U.S. federal tax purpose but cannot obtain an SSN.

Indian applicants can also refer to our guide on how to apply for an ITIN from India for practical information on overseas applications.

FAQs on ITIN Registration

1. Can Form W-7 be filed without attaching a U.S. federal income tax return?

Yes, but only when an IRS exception applies. Generally, Form W-7 is submitted with Form 1040 or Form 1040-NR. Applicants relying on an exception must establish the applicable federal tax purpose and provide the supporting documents prescribed in the Form W-7 instructions.

Non-residents who need return-filing support can also review our Form 1040-NR Filing service.

2. Does having U.S.-source income automatically allow ITIN registration without filing a tax return?

No. Having U.S.-source income does not automatically exempt an applicant from submitting a federal tax return with Form W-7. The person must qualify under a specific IRS exception and provide the documentation required for that exception.

Therefore, ITIN registration should be assessed according to the applicant’s actual tax circumstances.

3. Does forming a U.S. LLC automatically make a foreign owner eligible for an ITIN?

No. Forming or owning a U.S. LLC does not automatically make a foreign owner eligible for an ITIN. The owner must have a valid U.S. federal tax purpose, be ineligible for an SSN and meet the applicable Form W-7 requirements. Foreign entrepreneurs considering a business setup can explore our USA LLC Company Registration service.

Effective June 1, 2026, when a Certifying Acceptance Agent (CAA) submits Form W-7 for a client relying on Exception 1(a) for a partnership, the supporting partnership or LLC agreement must show the partnership’s name and EIN, the applicant’s name and signature, and that the applicant is a partner in a partnership conducting business in the United States. The EIN may also be shown through a CP 575 series EIN confirmation notice or Letter 147C.

4. Does an EIN issued to a U.S. LLC replace the owner’s ITIN?

No. An EIN identifies a business or entity for federal tax purposes, while an ITIN identifies an individual. A U.S. LLC may require an EIN while its foreign owner may separately need an ITIN depending on the owner’s individual federal tax obligations. Read our guide on the difference between ITIN and EIN.

5. Can an Indian resident complete ITIN registration without travelling to the United States?

Yes. An eligible Indian resident can apply for an ITIN from outside the United States. The applicant may submit the required package by mail or use an authorized Acceptance Agent or Certifying Acceptance Agent available abroad, subject to IRS requirements.

6. Are notarized passport copies accepted for ITIN registration?

Generally, no. The IRS normally requires original identification documents or copies certified by the issuing agency and does not accept ordinary notarized copies. However, spouses and dependents of U.S. military personnel may submit notarized copies of identification documents if they are applying from an overseas or APO/FPO address. If notarized documents are submitted, a copy of the servicemember’s U.S. military identification must also be provided.

7. Can a passport be the only supporting document for an ITIN application?

Yes. A valid passport is generally the only stand-alone document that can establish both identity and foreign status. However, a dependent who is required to prove U.S. residency generally needs a passport showing a date of entry into the United States for the passport to serve as stand-alone evidence. If the passport has no U.S. date of entry, additional documentation proving U.S. residency is generally required. Exceptions apply to dependents of U.S. military personnel stationed overseas and certain dependents from Canada or Mexico.

8. What happens if an applicant cannot provide a passport with Form W-7?

The applicant generally needs two acceptable supporting documents that together establish identity and foreign status. At least one normally needs to show a photograph, subject to exceptions for certain dependent applicants. The IRS maintains a specific list of acceptable supporting documents.

9. What is the difference between an Acceptance Agent and a Certifying Acceptance Agent?

An Acceptance Agent can assist with preparing and submitting Form W-7. A Certifying Acceptance Agent has additional IRS authority to authenticate specified original documents or certified copies, reducing the need for eligible applicants to send certain original identification documents directly to the IRS.

This distinction matters during ITIN registration.

10. Can a Certifying Acceptance Agent authenticate every supporting document for a dependent?

No. For dependent applicants, a CAA may authenticate passports and civil birth certificates. Other supporting documents generally must be submitted to the IRS as originals or issuing-agency-certified copies. CAAs also cannot authenticate foreign military identification cards.

11. Can a person apply for an ITIN if they are eligible for an SSN?

No. A person who has or is eligible to obtain a Social Security Number is not eligible for an ITIN. ITIN registration is specifically intended for individuals who require a taxpayer identification number for federal tax purposes but cannot obtain an SSN.

12. What happens if an ITIN holder later receives an SSN?

The person should stop using the ITIN and use the SSN for future federal tax purposes. The taxpayer should also notify the IRS so that prior tax records associated with the ITIN can be connected with the new SSN.

An individual should not continue using both taxpayer identification numbers.

13. When does an unused ITIN expire?

An ITIN expires on December 31 after it has not been used on a U.S. federal tax return for three consecutive tax years. An expired number generally needs renewal when it will again be included on a federal tax return. For further guidance, read Ebizfiling’s ITIN renewal guide.

14. Does an expired ITIN need renewal if it is used only on Form 1099?

No. An expired ITIN generally does not need renewal merely because it is used on an information return reporting payments, such as Form 1099. The IRS permits expired ITINs to continue being used on information returns. Renewal is required when the ITIN will be included on a federal tax return.

15. What happens if a federal tax return is filed using an expired ITIN?

The IRS may process the return, but processing can be delayed. Certain credits may also be unavailable until the expired ITIN is renewed. Taxpayers should therefore check the status of an existing number before using it to file a U.S. federal tax return.

16. What does IRS Notice CP565 mean after ITIN registration?

Notice CP565 means the IRS has assigned an ITIN to the applicant. No further action is generally required merely because this notice is received. The taxpayer should retain the notice and verify that the identifying information is correct.

Successful ITIN registration therefore normally results in an IRS assignment notice.

17. What should an applicant do after receiving IRS Notice CP566?

Notice CP566 means the IRS needs additional information to process the ITIN application. The applicant should carefully review the notice and provide the requested information or documents.

Receiving CP566 does not itself mean the application has been rejected. A complete response may allow ITIN registration to continue.

18. What does IRS Notice CP567 mean for an ITIN application?

Notice CP567 means the ITIN application was rejected. The applicant must review the reason for rejection, correct the problem and resubmit the application where appropriate.

Incorrect Form W-7 information or inadequate supporting documentation can therefore delay ITIN registration and may require a fresh submission.

19. Does obtaining an ITIN make a foreign individual a U.S. tax resident?

No. An ITIN is a federal tax processing number and does not itself determine U.S. tax residency. Tax residency is determined separately under applicable U.S. tax rules, including the green card test, substantial presence test and, where relevant, treaty provisions.

ITIN registration therefore does not change immigration or residency status.

20. How long does ITIN registration take for an applicant outside the United States?

The IRS generally advises applicants to allow about seven weeks for notification. Processing may take approximately nine to eleven weeks when an application is submitted from overseas or during the January 15 to April 30 peak processing period.

Incomplete applications may take longer.

ITIN Registration Support Made Easier with Ebizfiling

Applying for an ITIN from outside the United States can involve Form W-7 preparation, identifying the correct federal tax purpose, determining whether a tax return must be attached and arranging supporting documents in a form accepted by the IRS.

Ebizfiling assists foreign individuals and business owners with ITIN registration, document review and related U.S. tax compliance requirements. Applicants can use our ITIN Application in the USA service for professional filing assistance.

Where a nonresident also has a U.S. individual tax filing obligation, Ebizfiling provides Form 1040-NR filing support. Businesses and individuals looking for broader tax information can also read the guide on filing a U.S. federal income tax return.

Need Help with ITIN Registration? Ebizfiling Can Assist

Conclusion

An ITIN is intended for individuals who have a U.S. federal tax purpose but are not eligible for an SSN. Although ITIN registration is a commonly searched term, the actual IRS procedure requires Form W-7 and appropriate supporting documentation.

Applicants should carefully consider tax-return requirements, IRS exceptions, document certification, CAA limitations, expiry rules and IRS notices before applying.

These FAQs on ITIN registration help foreign individuals, nonresidents and U.S. business owners understand the technical requirements and avoid common documentation or filing issues during ITIN registration.