Who needs an itin?

Question

ITINMay 25, 2026

Who needs an itin?

An ITIN is for individuals without a Social Security number who need to file U.S. taxes or meet other IRS requirements. Learn who is eligible and why you might need one.

— Anonymous

1 Answer

Gokce Tandogdu ITIN Specialist, itin.net May 25, 2026 · Accepted Answer · 2026-05-25

You need an Individual Taxpayer Identification Number (ITIN) if you are a non-resident alien or foreign national who does not have and is not eligible for a U.S. Social Security number (SSN) but you have U.S. tax obligations or need to meet specific IRS requirements. This applies to individuals who need to file U.S. federal income tax returns, claim tax treaty benefits, or fulfill other U.S. tax reporting duties. The answer to who needs an ITIN is primarily driven by U.S. tax law and IRS regulations. If the IRS requires you to file a tax return or provide a tax identification number for any purpose, and you cannot obtain an SSN, you will likely need an ITIN. This number is issued by the Internal Revenue Service (IRS) and is used solely for tax purposes. It does not authorize employment in the U.S., nor does it provide eligibility for Social Security benefits. The primary purpose is to ensure that all individuals who have U.S. tax reporting requirements are identified and can comply with those obligations, even if they are not U.S. citizens or do not have an SSN. Understanding your specific situation and U.S. tax obligations is the first step in determining if you require an ITIN.

Eligibility for an ITIN

Eligibility for an ITIN is determined by specific IRS criteria, primarily centered around having a U.S. tax filing requirement or a need for a tax identification number where an SSN is not available or applicable. Most individuals who are not U.S. citizens or U.S. resident aliens and require a U.S. tax identification number will qualify. The IRS outlines several categories of applicants who may need an ITIN. These include:

Non-resident aliens filing a U.S. tax return: This is the most common reason. If you are not a U.S. resident alien and have U.S. source income that requires you to file Form 1040-NR (U.S. Nonresident Alien Income Tax Return), you will need an ITIN.
Individuals claiming tax treaty benefits: If you are a non-resident alien eligible for benefits under a U.S. income tax treaty, you may need an ITIN to claim these benefits on your U.S. tax return. For example, a foreign national receiving certain types of income from U.S. sources might be able to reduce or eliminate U.S. withholding tax through a tax treaty. To claim these benefits, you generally must file a U.S. tax return (often Form 1040-NR) with the appropriate ITIN.
Spouses and dependents of U.S. citizens or resident aliens: If you are the spouse or dependent of a U.S. citizen or resident alien and you are not eligible for an SSN, you may need an ITIN to be claimed as a dependent on the U.S. citizen's or resident alien's tax return, or if you have your own U.S. tax filing requirement.
Dependents and U.S. resident aliens filing U.S. tax returns: This category can be a bit nuanced. If you are a U.S. resident alien but not eligible for an SSN (e.g., certain lawful permanent residents or nonimmigrants), you may need an ITIN to file your U.S. tax return.
Beneficiaries of U.S. estates or trusts: If you are a foreign beneficiary of a U.S. estate or trust and have U.S. tax reporting requirements related to that income, you may need an ITIN.
Foreign individuals who are partners in a U.S. partnership: If you are a foreign individual who is a partner in a U.S. partnership, you will likely need an ITIN to report your share of the partnership's income, deductions, and credits on your U.S. tax return.

It is important to note that simply earning income in the U.S. does not automatically mean you need an ITIN. The requirement arises when that income necessitates filing a U.S. tax return or claiming specific tax benefits that require a U.S. taxpayer identification number. If you are unsure about your U.S. tax obligations, consulting with a tax professional is advisable.

When You Might Need an ITIN for Business or Investment

Beyond individual income tax returns, an ITIN becomes relevant for non-residents engaging in various U.S. business and investment activities. If you are planning to establish a U.S. business presence, such as forming a U.S. LLC, you will often encounter situations where an ITIN is necessary. For instance, if you are a foreign individual who owns or controls a U.S. business, you may be required to file Form 5472 (Information Return of a 25% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business) along with a pro forma Form 1120. This form is crucial for reporting transactions between the U.S. entity and its foreign owner. Without an ITIN or an SSN, you cannot file this required tax form. The complexity of U.S. business structures often necessitates a tax identification number for foreign individuals involved.

Furthermore, opening a U.S. bank account as a non-resident can sometimes be facilitated or even require a U.S. taxpayer identification number, although practices vary significantly among financial institutions. While some banks may accept foreign identification and other documentation, others might request an ITIN or an Employer Identification Number (EIN), which can be obtained by filing Form SS-4 with the IRS. An EIN is generally for businesses, but in some cases, a foreign individual might need to obtain one for specific investment activities or if they are establishing a U.S. business that will eventually hire employees or operate as a corporation or partnership. If you are involved in U.S. investments that generate income requiring U.S. tax reporting, an ITIN will be essential. This includes certain types of investment income, dividends, interest, or capital gains that are subject to U.S. tax rules. The need for an ITIN in these business and investment scenarios underscores its role in ensuring compliance with U.S. tax laws for foreign nationals and entities.

Documentation Required for an ITIN Application

Applying for an ITIN requires submitting Form W-7, Application for IRS Individual Taxpayer Identification Number, along with original or certified copies of supporting identification documents and your federal income tax return (or documentation proving an exception). The IRS requires proof of identity and foreign status. You must provide original documents or certified copies from the issuing agency for at least two forms of identification. The most commonly accepted documents include:

Passport: This is the preferred document as it serves as both proof of identity and foreign status. If you submit a passport, it usually fulfills the requirement for two documents.
National Identity Card: Must contain your photograph, name, address, date of birth, and expiration date.
U.S. Driver's License: Must show your name, photograph, current address, date of birth, and expiration date.
Foreign Driver's License: Must show your name, photograph, current address, date of birth, and expiration date.
Civil Birth Certificate: Must show your name, date of birth, and place of birth. A certified copy is acceptable.
Foreign Passport Card: Must show your name, photograph, date of birth, and expiration date.
U.S. State Identification Card: Must show your name, photograph, current address, date of birth, and expiration date.
Visa: Must show your name, expiration date, and entry date into the U.S. if applicable.
U.S. Citizenship and Immigration Services (USCIS) Photo Identification: Such as an Employment Authorization Card (EAC).
Medical Records (for dependents under age 6): Must be from a U.S. medical institution and show the child's name, date of birth, and U.S. address.
School Records (for dependents under age 18): Must be from a U.S. school and show the child's name, U.S. address, and date of birth.

If you cannot provide a passport, you must submit at least two other acceptable documents that, together, verify your identity and foreign status. For example, a combination of a national identity card and a birth certificate is often used. All documents must be valid (not expired) at the time of application. If your documents are not in English, you must provide a certified translation. The IRS will not return original documents submitted directly to them. If you use a Certified Acceptance Agent, they can verify your original documents and you won't have to mail them to the IRS.

How to Apply for an ITIN

There are three primary methods for applying for an ITIN. Each method has its own advantages and considerations regarding convenience, speed, and the handling of original documents. The method you choose will depend on your personal circumstances and preference.

Method 1: Mail Your Application Directly to the IRS

You can complete Form W-7 and attach it to your U.S. federal income tax return. You will also need to include your original or certified copies of identification documents. Mail the complete package to the IRS address specified in the Form W-7 instructions for the year you are applying. The IRS will process your application, verify your documents, and issue your ITIN. This process can take several weeks to several months, as the IRS must review your entire submission. They will then mail your original identification documents back to you. This method requires you to mail your original identification documents, which can be a concern for some applicants.

Method 2: Apply Through a Certified Acceptance Agent (CAA)

Applying through a Certified Acceptance Agent, also known as a CAA, is a popular and often more convenient option. CAAs are individuals or entities authorized by the IRS to help taxpayers apply for ITINs. They are trained by the IRS and can authenticate your original identification documents. This means you can submit your Form W-7, tax return, and your original identification documents to the CAA, and they will review them, authenticate your documents, and forward your application package to the IRS. The key benefit here is that the CAA verifies your original documents and returns them to you on the spot, eliminating the risk of mailing your valuable identification. This significantly reduces the anxiety associated with sending original documents through the mail. The itin.net service is a Certified Acceptance Agent, providing a streamlined application process.

Method 3: Apply at an IRS Taxpayer Assistance Center (TAC)

Certain IRS Taxpayer Assistance Centers (TACs) offer ITIN application services. You can schedule an appointment to apply in person at one of these designated TACs. You will need to bring your completed Form W-7, your federal income tax return, and your original identification documents. The IRS staff at the TAC will review your application and authenticate your identification documents. However, not all TACs provide this service, and appointments can be difficult to obtain, especially during peak tax seasons. It is essential to check the IRS website or call to confirm if a TAC near you offers ITIN application assistance and to schedule an appointment in advance.

Regardless of the method chosen, it is crucial to ensure that Form W-7 is completed accurately and that all required supporting documents are provided. Errors or omissions can lead to delays or rejection of your application. The tax return that accompanies your Form W-7 must also be complete and accurate. For most applicants, the ITIN application is tied to filing a tax return for the same tax year. There are some exceptions, such as for those claiming tax treaty benefits or those required to file Form 5472 for a U.S. LLC that has no U.S. tax liability.

Processing Times and Potential Delays

Once your ITIN application is submitted, the IRS processes it. The processing time can vary significantly depending on the volume of applications the IRS receives and the method you used to apply. Generally, if you mail your application directly to the IRS or apply through a TAC, you can expect to receive your ITIN within 6 to 11 weeks from the date the IRS receives your complete application. If you apply through a Certified Acceptance Agent (CAA), the processing time might be slightly faster as CAAs are trained to ensure applications are complete and accurate before submission, potentially reducing back-and-forth communication with the IRS.

However, these are general estimates, and actual processing times can be longer. Several factors can cause delays:

Incomplete Application: Missing information on Form W-7, such as incorrect personal details, missing identification documents, or an incomplete tax return, will cause delays. The IRS will send you a notice (often a letter or a CP-48 notice if there's an issue with your application) requesting the missing information, which extends the processing time.
Incorrect Identification Documents: Submitting expired documents, documents that do not meet the IRS requirements (e.g., not providing two forms of ID if a passport isn't used), or documents that cannot be verified can lead to rejection or delays.
High Application Volume: During peak tax filing seasons (typically January through April), the IRS receives a massive influx of ITIN applications. This surge can significantly extend processing times beyond the usual estimates.
Changes in IRS Procedures: Occasionally, the IRS may update its procedures or systems, which could temporarily impact processing times.
Mail Delays: If you applied by mail, postal service delays in sending or returning your documents can add to the overall timeline.

It is advisable to apply for your ITIN well in advance of any deadlines related to your tax filing or other obligations. Do not make travel plans that rely on receiving your ITIN by a specific date, as the IRS does not guarantee processing times. If you are applying to meet a tax filing deadline, ensure your application is submitted at least 10-12 weeks prior to the deadline. If your application is rejected, you will receive a notice explaining the reason, and you will need to reapply. Once your ITIN is issued, the IRS will send you a notice, often Form CP-565, which contains your ITIN. Keep this notice and your ITIN in a safe place.

ITIN Renewal and Expiration

Historically, ITINs did not expire. However, the IRS introduced a renewal program starting in 2015. Under current IRS rules, ITINs that have not been used on a federal tax return for three consecutive tax years expire. Additionally, ITINs with middle digits 70-82 (e.g., XX-70XXXXX, XX-71XXXXX) expired on December 31, 2019, and ITINs with middle digits 83-92 (e.g., XX-83XXXXX, XX-92XXXXX) expired on December 31, 2020. ITINs with middle digits 93-99 expired on December 31, 2021. ITINs with middle digits 83-92 expired on December 31, 2020. All remaining ITINs with middle digits 70 through 82 expired on December 31, 2019. All remaining ITINs with middle digits 93 through 99 expired on December 31, 2021. All remaining ITINs with middle digits 83 through 92 expired on December 31, 2020. All remaining ITINs with middle digits 93 through 99 expired on December 31, 2021. All remaining ITINs with middle digits 83 through 92 expired on December 31, 2020. All remaining ITINs with middle digits 93 through 99 expired on December 31, 2021. The IRS has a phased approach to expiring ITINs. If your ITIN has expired, you must renew it before you can file your tax return or claim any tax benefits that require an ITIN. The renewal process is similar to the initial application process: you must submit Form W-7, proof of foreign status and identity, and a valid federal income tax return for the year you are claiming the renewed ITIN.

The IRS began notifying taxpayers with expiring ITINs in 2016. If your ITIN has expired and you need to use it for tax filing purposes, you must submit a renewal application. The renewal application requires the same documentation as the initial application. You do not need to reapply if your ITIN has been used on a federal tax return within the last three years and has not expired due to the middle digit phasing. However, if your ITIN has expired, or if you have never been issued an ITIN and need one, you must apply or renew. The IRS recommends renewing your ITIN during the tax filing season. You can renew your ITIN any time during the year, but applying earlier in the year may provide more time for processing before tax deadlines. The IRS will issue you a new ITIN if your old one has expired or if you are applying for the first time. It is crucial to be aware of the expiration dates and renewal requirements to avoid issues with your tax filings.

Common Mistakes When Applying for an ITIN

Many applicants make common mistakes that can delay or result in the rejection of their Form W-7 application. Being aware of these pitfalls can help ensure a smoother application process. Some of the most frequent errors include:

Incorrect or Incomplete Personal Information: Discrepancies between the name on your identification documents and the name on Form W-7, incorrect dates of birth, or missing required fields can cause problems. Ensure all information matches exactly.
Improper Identification Documents: Submitting expired documents, photocopies instead of originals or certified copies, or documents that do not meet the IRS criteria for proving identity and foreign status are common issues. Remember, if you are not using a passport, you need at least two other documents that collectively verify your identity and foreign status.
Failure to Include a Tax Return: For most applicants, Form W-7 must be submitted with a valid federal income tax return for the year for which the ITIN is needed. Failing to include this, or submitting an incomplete or inaccurate tax return, is a primary reason for rejection. There are exceptions, such as for those claiming tax treaty benefits or filing Form 5472 for a U.S. LLC with no U.S. tax liability, but these exceptions require specific documentation to be provided with the Form W-7.
Not Using Certified Translations for Foreign Language Documents: If your identification documents are not in English, you must provide certified translations. Failure to do so will result in your application being rejected.
Mailing Original Documents Without Using a CAA: While the IRS does return original documents, many applicants are understandably hesitant to mail them. Using a Certified Acceptance Agent, like those at itin.net, allows them to verify your original documents and return them to you immediately, avoiding the risk of loss or delay in postal transit.
Not Checking for ITIN Expiration: As mentioned earlier, ITINs can expire. Many individuals do not realize their ITIN has expired and try to use it, leading to filing issues. It is essential to check your ITIN's validity, especially if it hasn't been used in the past few years or falls within the expired middle digit ranges.

Avoiding these common errors by carefully reviewing the Form W-7 instructions and supporting documentation requirements can significantly increase the chances of a timely and successful ITIN application. Double-checking all details before submission is key. If you are in doubt about any part of the process, seeking assistance from a qualified tax professional or a CAA is recommended.

Next Steps After Obtaining Your ITIN

Once you have successfully received your ITIN (typically on Form CP-565), your primary tax obligations for which you applied should be met. However, obtaining an ITIN often opens the door to further steps in managing your U.S. financial and tax life. If your ITIN was needed to file a U.S. tax return, ensure that return was filed accurately and on time. If you received an ITIN because you are part of a U.S. business structure, such as a U.S. LLC, you may need to consider obtaining an Employer Identification Number (EIN), which is done by filing Form SS-4 with the IRS. An EIN is essential for businesses that will hire employees, operate as a corporation or partnership, or have certain types of retirement plans. Even if your LLC doesn't immediately require an EIN, it's often a necessary step for opening a U.S. bank account or for future business operations.

For individuals who are non-residents and have U.S. income, you should continue to monitor your U.S. tax obligations annually. This includes filing U.S. tax returns if required, reporting any U.S. source income, and claiming any applicable tax treaty benefits. Remember that your ITIN may expire if not used on a federal tax return for three consecutive years, so ensure you maintain your U.S. tax compliance. If you are planning to invest in the U.S., start a business, or work in the U.S. in the future, your ITIN is a foundational document. It demonstrates your compliance with U.S. tax laws. For non-residents looking to expand their U.S. presence, the ITIN is often the first step, followed by securing an EIN and establishing banking relationships. Consulting with tax professionals like those at itin.net can help you understand your ongoing obligations and plan for future U.S. financial activities. The journey of who needs an ITIN often leads to more complex U.S. financial engagements, and staying informed is key.

Seeking Assistance with Your ITIN Application

Navigating the U.S. tax system as a foreign national can be complex, and applying for an ITIN is often the first hurdle. If you find the process confusing or have a situation that doesn't fit the standard requirements, seeking professional assistance is highly recommended. Certified Acceptance Agents (CAAs) are specifically authorized by the IRS to help individuals apply for ITINs. They can guide you through the Form W-7 application, verify your original identification documents, and submit your application package to the IRS on your behalf. This is particularly beneficial as it allows you to keep your original documents, avoiding the risk of mailing them. Services like itin.net operate as CAAs, offering expertise and a streamlined process to ensure your application is accurate and complete.

Beyond CAAs, consulting with a qualified tax advisor or an enrolled agent who specializes in international tax matters can provide comprehensive support. They can help you understand your U.S. tax obligations, determine if you truly need an ITIN, and advise on the best way to file your tax returns. If your situation involves complex tax treaties, foreign investments, or structuring a U.S. business, their expertise is invaluable. Do not hesitate to seek help if you are unsure about any aspect of the ITIN application or your U.S. tax responsibilities. Professional guidance can prevent costly errors and ensure compliance with IRS regulations. For more information on ITIN services and expert advice, you can visit the author page for insights from experienced specialists.