Gokce Tandogdu
ITIN Specialist, itin.net
A Social Security number (SSN) is issued to U.S. citizens, permanent residents, and temporary (working) residents who have authorization to work in the United States. An Individual Taxpayer Identification Number (ITIN) is issued by the Internal Revenue Service (IRS) to individuals who need a U.S. taxpayer identification number but do not have, and are not eligible to obtain, an SSN. This distinction is critical for non-residents and foreign nationals who need to file U.S. tax returns, claim tax treaty benefits, or meet other U.S. tax-related obligations.
Understanding the difference between an SSN and an ITIN is the first step for anyone who is not a U.S. citizen or eligible resident but has U.S. tax responsibilities. The core purpose of both numbers is to track tax obligations and payments. The IRS uses these numbers to identify taxpayers, process tax returns, and manage tax accounts. If you are a foreign national who is not eligible for an SSN but has a U.S. tax filing requirement, you will likely need an ITIN. This often includes individuals who receive U.S. source income, are required to file U.S. tax returns, or are dependents or spouses of U.S. taxpayers. The question "what is social security number or itin" is fundamental for many foreign nationals planning to engage with the U.S. financial and tax system.
Eligibility for an SSN vs. an ITIN
Eligibility for an SSN is determined by U.S. immigration law and is generally limited to individuals authorized to work in the U.S. or those who are otherwise eligible through specific provisions, such as being a child of a U.S. citizen. The Social Security Administration (SSA) issues SSNs. You must have work authorization from the Department of Homeland Security (DHS) to apply for an SSN, unless you are eligible for other specific reasons, like being a student on an F-1 or M-1 visa with an authorized on-campus job.
An ITIN, on the other hand, is available to any non-resident alien or resident alien who is not eligible for an SSN and has a U.S. tax filing requirement or is a dependent/spouse of a U.S. taxpayer. The IRS issues ITINs. The key differentiator is the authorization to work. If you do not have authorization to work in the U.S. but have a U.S. tax obligation, you will need an ITIN. This includes foreign investors receiving U.S. dividends, foreign individuals selling U.S. real estate, or foreign students receiving certain types of income not covered by tax treaties or excluded by law. The IRS uses Form W-7, Application for IRS Individual Taxpayer Identification Number, to process ITIN applications.
Purpose and Use of an ITIN
The primary purpose of an ITIN is to facilitate U.S. tax compliance for individuals who cannot obtain an SSN. An ITIN allows you to:
- File a U.S. federal income tax return (e.g., Form 1040-NR for non-resident aliens).
- Claim tax treaty benefits, which can reduce or eliminate U.S. tax withholding on certain types of income.
- Comply with U.S. tax laws that require a U.S. taxpayer identification number.
- Open a U.S. bank account. While some banks may allow opening an account with an ITIN and a foreign passport, others may require an SSN or additional documentation. Some financial institutions, like those that offer services to international clients, are more accustomed to processing applications with ITINs. This can be particularly helpful for individuals planning to open a U.S. bank account for business or personal reasons.
- Obtain a U.S. Employer Identification Number (EIN) or EIN for a business entity, although this is less common as an EIN is primarily for businesses. An ITIN is for individuals.
- Comply with reporting requirements, such as filing Form 5472 for transactions with a U.S. owner of a foreign corporation or a foreign owner of a U.S. corporation, which is often relevant for owners of a U.S. LLC.
An ITIN does not, by itself, grant any U.S. immigration status, authorization to work in the U.S., or eligibility for Social Security benefits. It is strictly a tax processing number. The IRS assigns these numbers to ensure that all eligible individuals pay their taxes and comply with U.S. tax laws, even if they are not U.S. residents.
How to Apply for an ITIN (Form W-7)
To apply for an ITIN, you must complete and submit Form W-7, Application for IRS Individual Taxpayer Identification Number. You must also submit original documentation or certified copies of your identification and foreign status. The application process can be done by mail, through a Taxpayer Assistance Center (TAC) appointment, or via a Certifying Acceptance Agent (CAA). itin.net is a service that can assist with the ITIN application process, acting as a liaison between you and the IRS.
Application Methods:
- Mail: You can mail your completed Form W-7, along with original or certified copies of your identification documents and a federal tax return (unless an exception applies), to the IRS address specified in the Form W-7 instructions. The IRS will review your application and supporting documents. Original documents will be mailed back to you, which can take several weeks.
- IRS Taxpayer Assistance Center (TAC): You can make an appointment at a designated IRS TAC to have your documentation verified. You will need to bring your original identification documents or certified copies to the appointment. The IRS will verify your documents and forward your application to the ITIN processing center. This option can be convenient for verifying original documents.
- Certifying Acceptance Agent (CAA): This is often the most convenient method for foreign nationals. A CAA is an individual or entity (like itin.net) that has been authorized by the IRS to assist taxpayers in applying for ITINs. A CAA can review your identification documents and tax return, and then forward your application directly to the IRS. Crucially, a CAA can certify your identification documents, meaning you do not have to mail your original passport or other sensitive identification to the IRS. This significantly reduces the risk of loss or theft of your important documents. Using a Certified Acceptance Agent can streamline the process and provide peace of mind.
Required Documentation for Form W-7:
To apply for an ITIN, you generally need to provide:
- A completed Form W-7: Ensure all sections are filled out accurately. You must provide a valid reason for needing an ITIN.
- Your original federal income tax return: This is typically required unless you qualify for an exception (e.g., you are applying for an ITIN to meet a specific withholding requirement or to claim treaty benefits without filing a full return).
- Original identification documents or certified copies: You must provide proof of identity and foreign status. Acceptable documents include:
- Passport (most commonly used and preferred)
- National Identity Card
- Birth Certificate
- Driver's License
- Foreign Voter's Registration Card
- Visa
- U.S. Citizenship and Immigration Services (USCIS) photo identification
- Foreign military identification card
- Foreign driver's license
If you submit original documents to the IRS via mail or TAC, they will be returned to you. If you use a CAA, they can certify your documents, meaning you retain your originals.
Processing Time for an ITIN
Processing times for ITIN applications can vary significantly. Currently, the IRS is experiencing high volumes, and processing can take 6 to 11 weeks or longer from the date the IRS receives your complete application. This timeframe does not include mailing times. If you apply during peak tax season (January through April), expect longer delays. It is advisable to apply well in advance of any tax filing deadlines.
Once your application is processed, the IRS will issue you a CP-565, ITIN Assignment Letter, which contains your ITIN. This letter is sent by mail to the address you provided on Form W-7. If your application is rejected, you will receive a letter explaining the reason.
ITIN Renewal and Expiration
ITINs do not expire automatically in the same way a driver's license does. However, the IRS has implemented a policy where ITINs that have not been used on a federal tax return for three consecutive tax years will be deactivated. The IRS also periodically identifies and retires ITINs that may have been issued in error or are no longer needed. If your ITIN is deactivated, you will need to reapply by submitting a new Form W-7 along with a tax return and updated documentation.
Starting with the 2020 tax year, the IRS began a phased renewal process for certain ITINs. ITINs with middle digits between 70-82, 83-92, and 57-69 are subject to renewal. If your ITIN falls into one of these ranges and you need to file a U.S. tax return, you must renew it. The IRS will send a notice if your ITIN is among those needing renewal. You can check the IRS website for the latest information on ITIN renewal.
When an SSN is Required vs. When an ITIN is Sufficient
An SSN is required for most employment in the U.S., for receiving certain government benefits, and for many other financial transactions where U.S. residency and work authorization are presumed. For instance, if you are legally authorized to work in the U.S. as a permanent resident or under certain visa categories, you must obtain an SSN instead of an ITIN.
An ITIN is sufficient for fulfilling U.S. tax obligations when you are not eligible for an SSN. This includes:
- Filing U.S. tax returns as a non-resident alien receiving U.S. source income (e.g., rental income, dividend income, royalties).
- Claiming tax treaty benefits to reduce U.S. withholding tax.
- Being a dependent or spouse of a U.S. taxpayer.
- Opening a U.S. bank account, though this can sometimes be challenging depending on the bank's policies.
- Complying with reporting requirements like Form 5472 for U.S. businesses owned by foreign individuals or entities.
It is crucial to use the correct identification number. Using an ITIN when you are eligible for an SSN, or vice versa, can lead to processing delays or issues with your tax filings.
Common Mistakes When Applying for an ITIN
Several common mistakes can cause delays or rejections of ITIN applications:
- Incomplete Form W-7: Missing information, especially the reason for applying or the required tax return, will lead to rejection.
- Incorrect Identification Documents: Submitting expired documents, documents that do not match the name on the tax return, or photocopies instead of certified copies or originals.
- Failure to Include a Tax Return: For most applicants, a federal tax return must be submitted with the W-7. Exceptions are narrow and must be clearly documented.
- Mailing Original Documents Without Certification: If you mail original documents and they are lost or stolen, the IRS is not responsible for their replacement.
- Not Understanding CAA Benefits: Many applicants are unaware that a CAA can certify their documents, avoiding the need to mail originals.
- Errors in Name or Address: Discrepancies between the name on your identification and the name on your tax return, or an incorrect mailing address, can cause issues.
Careful attention to detail on Form W-7 and ensuring all supporting documentation meets IRS requirements is vital for a smooth application process.
Next Steps for Foreign Nationals in the U.S.
For foreign nationals who have obtained an ITIN, the next steps often involve managing their U.S. tax obligations and potentially establishing a U.S. business presence. If you plan to conduct business in the U.S., you may need an EIN for your business, even if you are not a U.S. resident. This is typically obtained by filing Form SS-4, Application for Employer Identification Number. Many foreign entrepreneurs also set up a U.S. LLC to conduct business, which requires obtaining an EIN and may involve other compliance steps like filing Form 5472 if it's a single-member LLC owned by a foreign person.
Opening a U.S. bank account is another common requirement for those operating a business or managing U.S. investments. While an ITIN can sometimes be used, having an EIN and a U.S. business structure can significantly simplify this process. For personalized assistance with ITIN applications or understanding these related U.S. tax and business processes, consider consulting with a specialist. You can learn more about the expertise behind itin.net at our about page.