Gokce Tandogdu
ITIN Specialist, itin.net
U.S. tax law requires an Individual Taxpayer Identification Number (ITIN) for certain non-resident aliens and others who have U.S. tax obligations but are not eligible for a Social Security number (SSN). This means if you have a U.S. tax filing requirement or need to conduct certain financial transactions in the United States, and you cannot obtain an SSN, you likely need an ITIN. The question of "who is required to have an ITIN number" is best answered by understanding the specific situations that trigger this requirement.
Who Needs an ITIN?
An ITIN is issued by the Internal Revenue Service (IRS) to individuals who are neither U.S. citizens nor eligible for an SSN. The most common individuals requiring an ITIN fall into several broad categories:
- Non-resident aliens filing U.S. tax returns: This is the primary group needing an ITIN. If you are not a U.S. resident for tax purposes but have income from U.S. sources that requires you to file a U.S. federal income tax return (like Form 1040-NR), you need an ITIN. This includes individuals earning wages, receiving rental income, or having other U.S. source income.
- U.S. resident aliens who are not eligible for an SSN: While less common, some individuals who are considered U.S. resident aliens for tax purposes may not be eligible for an SSN. They would also require an ITIN to meet their U.S. tax obligations.
- Dependents or spouses of U.S. citizens/resident aliens: If you are a dependent or spouse of a U.S. citizen or resident alien and need to be claimed on a U.S. tax return, but you do not have an SSN and are not eligible for one, you will need an ITIN. This allows the U.S. taxpayer to claim you as a dependent or spouse on their return.
- Individuals subject to U.S. tax law due to specific transactions: Even if you don't have ongoing U.S. income, certain transactions may require you to file a U.S. tax return or information return, thus necessitating an ITIN. Examples include:
- Receiving distributions from a U.S. retirement plan or IRA.
- Being a partner in a U.S. partnership.
- Being a beneficiary of a U.S. estate or trust.
- Selling or disposing of U.S. real property.
- Non-resident aliens claiming tax treaty benefits: If you are a non-resident alien who is eligible for benefits under a U.S. income tax treaty and you need to claim these benefits on a U.S. tax return, you will need an ITIN.
Specific Scenarios Requiring an ITIN
Beyond the general categories, certain specific situations make it clear that an ITIN is required. Understanding these scenarios helps clarify "who is required to have an ITIN number."
Opening a U.S. Bank Account
Many U.S. financial institutions require a U.S. taxpayer identification number to open an account. While some banks may accept an ITIN for non-resident aliens, others may have different requirements or policies. If you are a non-resident alien planning to open a U.S. bank account, and the bank requires a taxpayer identification number, an ITIN is typically the number you would use if you do not have an SSN. This is particularly relevant for non-residents planning to establish a U.S. business presence, such as a U.S. LLC. Opening a U.S. bank account is often a critical step for such ventures, and the ITIN facilitates this process. Services like Mercury, Relay, and Brex are popular choices for non-resident entrepreneurs, and they often require a U.S. taxpayer ID. If you are forming a U.S. LLC, you will likely need to open a U.S. bank account for its operations. This process is detailed further on our /llc page.
Filing U.S. Tax Returns (Form 1040-NR)
As previously mentioned, the most common reason for needing an ITIN is to file a U.S. federal income tax return. Non-resident aliens who earn income from U.S. sources must file Form 1040-NR, U.S. Nonresident Alien Income Tax Return. This includes income such as wages earned while working in the U.S., rental income from U.S. properties, or other forms of U.S. investment income. Without an ITIN, you cannot properly file Form 1040-NR, and you may face penalties or miss out on tax refunds or treaty benefits.
Claiming Tax Treaty Benefits
The United States has tax treaties with many countries designed to prevent double taxation. If you are a non-resident alien and your country has a tax treaty with the U.S., you may be eligible for reduced tax rates or exemptions on certain types of U.S. source income. To claim these treaty benefits, you generally must file a U.S. tax return (often Form 1040-NR) and include documentation that supports your claim. An ITIN is required to file this return and claim the treaty provisions.
Information Returns (Form 5472)
For non-resident aliens who own a U.S. business, particularly a U.S. LLC that is treated as a disregarded entity for U.S. tax purposes, there is a specific reporting requirement. These individuals must 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. This form is used to report certain transactions between the foreign owner and the U.S. entity. If you are the foreign owner of a disregarded entity U.S. LLC, you will need an ITIN to file Form 5472. Failure to file this form can result in significant penalties, often $25,000. The setup of a U.S. LLC often involves obtaining an EIN for the entity, which can be obtained by filing Form SS-4. Detailed information on this process is available on our /ein page.
Other Situations
Several other less common scenarios can also trigger the need for an ITIN:
- Withholding tax on U.S. source income: If you receive U.S. source income that is subject to withholding tax (e.g., dividends, interest, royalties), and the withholding agent requires a taxpayer identification number to apply treaty rates or exemptions, you will need an ITIN.
- Filing for U.S. tax refunds: Even if you are not required to file a U.S. tax return annually, you might be eligible to claim a refund of over-withheld U.S. taxes. To do so, you would need to file a U.S. tax return and, consequently, an ITIN.
- Applying for an ITIN for a minor: If a child is a dependent on a U.S. tax return and does not have an SSN, the parent or guardian will need to obtain an ITIN for the child to claim them on the tax return.
Who is NOT Required to Have an ITIN?
It is equally important to understand who does not need an ITIN. The primary criterion for not needing an ITIN is eligibility for an SSN. If you are eligible to receive an SSN from the Social Security Administration (SSA), you must obtain an SSN instead of an ITIN. The IRS will not issue an ITIN to individuals who are eligible for an SSN. This includes:
- Most individuals authorized to work in the United States (e.g., green card holders, individuals with work visas like H-1B, L-1, O-1, etc.).
- U.S. citizens.
If you believe you are eligible for an SSN but have been trying to obtain an ITIN, you should first contact the Social Security Administration to determine your eligibility for an SSN.
Applying for an ITIN: Form W-7
To obtain an ITIN, you must file Form W-7, Application for IRS Individual Taxpayer Identification Number. This form requires you to provide your name, address, and other identifying information. Crucially, you must also submit original documentation or certified copies of documents proving your identity and foreign status. These documents typically include:
- A U.S. federal income tax return (unless you qualify for an exception).
- A passport (this is the most commonly used and recommended identification document).
- Other acceptable documents include a national identity card, birth certificate, driver's license, foreign driver's license, civil birth certificate, etc. The IRS provides a comprehensive list of acceptable documents on the Form W-7 instructions.
How to Submit Form W-7
There are several ways to submit your Form W-7 application:
- By Mail: You can mail your completed Form W-7, along with your original identification documents and tax return, directly to the IRS ITIN Operation at the address specified in the form instructions. Be aware that sending original documents through the mail carries a risk, and the IRS processing times can be lengthy, often taking 7–11 weeks or more. The IRS will mail your original documents back to you, but this can take additional time.
- Through a Certified Acceptance Agent (CAA): This is often the preferred method for many applicants. A Certified Acceptance Agent (CAA) is an individual or entity authorized by the IRS to help taxpayers apply for ITINs. When you apply through a CAA, you typically present your original identification documents to the agent, who will then verify them and forward your application package to the IRS. A significant advantage of using a CAA is that they can often certify your identification documents, meaning you do not have to mail your original passport or other vital documents to the IRS. This can significantly reduce the risk of losing important identification. Many individuals and businesses use services like itin.net to connect with a Certified Acceptance Agent. This streamlined process can be more convenient and secure.
- At an IRS Taxpayer Assistance Center (TAC): Some IRS TACs offer ITIN application services. You can make an appointment at a TAC to have your application processed. However, not all TACs provide this service, and you must verify availability and make an appointment in advance. You will need to bring your original identification documents with you.
Processing Times and Costs
The IRS does not charge a fee to apply for an ITIN. The application process itself is free. However, if you use a Certified Acceptance Agent or a third-party service to assist you with the application, they may charge a fee for their services. The IRS aims to process Form W-7 applications within 7–11 weeks from the date they are received. However, during peak tax seasons or periods of high application volume, processing times can extend. The IRS will mail a notice, such as CP-565, to you once your ITIN has been assigned. This notice confirms your ITIN and should be kept in a safe place for future reference.
Common Mistakes When Applying for an ITIN
Understanding who is required to have an ITIN number is the first step; successfully obtaining one requires careful attention to detail. Several common mistakes can lead to delays or rejections of your Form W-7 application:
- Incomplete Application: Failing to fill out all required fields on Form W-7 can cause delays. Ensure every section is completed accurately.
- Missing or Unacceptable Documentation: Not providing valid proof of identity and foreign status is a frequent issue. Ensure you are submitting either original documents or certified copies from the issuing agency, and that the documents meet the IRS criteria. Using a Certified Acceptance Agent can help ensure your documentation is correctly presented.
- Incorrect Tax Return: If your ITIN application is tied to filing a tax return, ensure the tax return is accurate, complete, and signed. Errors on the tax return can lead to rejection of the ITIN application.
- Not Including a Tax Return When Required: Many ITIN applications are contingent on filing a U.S. tax return. If you fail to include the required tax return (or a valid exception form), your application will be rejected.
- Mailing Original Documents Without Backup: If you choose to mail your original identification documents, be aware that they will be sent back to you, but it takes time. Some applicants prefer the security of a CAA to avoid mailing critical documents.
- Incorrectly Claiming Treaty Benefits: If you are applying to claim tax treaty benefits, ensure you have the correct treaty article number and understand the specific requirements for that treaty. Misunderstandings here can lead to the rejection of the benefit claim, even if the ITIN is issued.
ITIN Renewal
ITINs do not expire automatically. However, the IRS may revoke an ITIN if it has not been used on a federal tax return for three consecutive tax years. Additionally, the IRS may require ITINs to be renewed periodically. If your ITIN is selected for renewal, you will receive a notice from the IRS, such as CP-48, indicating that renewal is necessary. You will need to submit a new Form W-7 along with updated identification documents and, if applicable, a tax return to renew your ITIN. This process is similar to the initial application.
When to Seek Professional Help
While the IRS provides instructions for applying for an ITIN, the process can be complex, especially for individuals with intricate tax situations or those unfamiliar with U.S. tax law. If you are unsure about whether you are required to have an ITIN, which documents to submit, or how to complete Form W-7 and any associated tax returns, seeking professional assistance is highly recommended. Experienced tax professionals, including Certified Acceptance Agents, can guide you through the application process, help you gather the necessary documentation, and ensure your application is complete and accurate. For those planning to establish a U.S. business, understanding the interplay between ITINs, EINs, and U.S. LLCs is crucial for compliance and operational efficiency. Resources like itin.net can help you find qualified professionals and further information on these topics, including our /about page which details the expertise available.
In summary, if you have U.S. tax obligations and cannot obtain an SSN, you are likely required to have an ITIN number. This applies to non-resident aliens filing U.S. taxes, claiming treaty benefits, or engaging in specific financial transactions. Carefully review your situation against the IRS requirements and consider seeking expert guidance to ensure a smooth application process.