Gokce Tandogdu
ITIN Specialist, itin.net
An SSN (Social Security Number) is issued to U.S. citizens, permanent residents, and some temporary working residents. An ITIN (Individual Taxpayer Identification Number) is issued by the IRS to non-resident aliens and others who need a U.S. taxpayer identification number but do not have and are not eligible to obtain an SSN. The core distinction lies in eligibility: SSNs are primarily for those authorized to work in the U.S., while ITINs are for tax compliance when work authorization is absent.
Who Needs an SSN?
An SSN is a nine-digit number assigned by the Social Security Administration (SSA) to U.S. citizens, permanent residents, and temporary (working) non-immigrant residents. Eligibility for an SSN is generally tied to authorization to work in the United States. If you are authorized to work, you must obtain an SSN. This number is used for tracking earnings for Social Security benefits and for federal and state tax reporting. You apply for an SSN using Form SS-5, Application for a Social Security Card. If you are eligible for an SSN, you cannot apply for an ITIN. The IRS checks SSA records to confirm eligibility before issuing an ITIN.
Who Needs an ITIN?
An ITIN is a nine-digit tax processing number issued by the Internal Revenue Service (IRS). It is available to individuals who are not eligible for an SSN but are required to have a U.S. taxpayer identification number for tax purposes. This includes:
- Non-resident aliens who need to file a U.S. tax return (e.g., to claim treaty benefits or report U.S. source income).
- U.S. resident aliens (based on days present in the U.S.) who are not eligible for an SSN.
- Dependents or spouses of U.S. citizens or resident aliens who do not have and are not eligible to obtain an SSN.
- Dependents or spouses of non-resident alien visa holders (e.g., H-1B, L-1) who do not have and are not eligible to obtain an SSN.
If you are not eligible for an SSN, you will need an ITIN to meet your U.S. tax obligations. Understanding what does SSN/ITIN mean is crucial for compliance. For example, if you are a foreign national receiving U.S. source income but not authorized to work, you will likely need an ITIN to file your tax return and potentially claim tax treaty benefits. Similarly, if you are investing in U.S. real estate and need to file specific informational returns like Form 5472, you might need an ITIN if you don't have an SSN.
Applying for an ITIN
The IRS issues ITINs through Form W-7, Application for IRS Individual Taxpayer Identification Number. You cannot apply for an ITIN online. You must submit the completed form along with original documentation or certified copies of your identification and foreign status. The primary document typically required is a valid passport. If you don't have a passport, other documents like a national identification card, driver's license, or birth certificate may be accepted, provided they meet specific IRS criteria. The application process can take several weeks.
There are two main ways to apply for an ITIN:
- By Mail: You can mail your completed Form W-7, supporting identification documents, and your U.S. federal income tax return to the IRS at the address specified on the Form W-7 instructions. The IRS will review your application and documents, issue an ITIN, and then process your tax return. Your original documents will be returned to you, typically within 60 days.
- Through a Certified Acceptance Agent (CAA): A CAA is an individual or entity (like itin.net) that has been certified by the IRS to assist applicants in obtaining ITINs. CAAs can verify your original identification documents and forward your Form W-7 application to the IRS on your behalf. This is often a faster and more convenient method, as CAAs can streamline the process and ensure your documentation is complete, reducing the chance of delays or rejection. Using a CAA means you do not have to mail your original identification documents to the IRS.
What Information is Needed for Form W-7?
To apply for an ITIN using Form W-7, you will need to provide several key pieces of information and documentation:
- Completed Form W-7: This form requires your full legal name, mailing address, foreign address, date of birth, place of birth, and country of citizenship. You will also need to indicate the reason you need an ITIN. If you are applying based on a tax return, you will need to attach that return to your Form W-7.
- Proof of Identity and Foreign Status: You must provide original or certified copies of documents that prove both your identity and your foreign status. The most commonly accepted document is a valid passport. If you cannot provide a passport, a combination of other documents may be accepted, such as:
- National identification card (with photo, name, address, DOB, and expiration date)
- U.S. driver's license
- Foreign driver's license
- Birth certificate (for dependents under 18)
- Medical records (for dependents under 6)
- Voter's registration card
- Civilan I.D. card from the U.S. Department of Defense or U.S. Coast Guard
- Visa
- The IRS website provides a comprehensive list of acceptable documents.
- U.S. Federal Income Tax Return: For most applicants, Form W-7 must be submitted with an accompanying U.S. federal income tax return. There are exceptions, such as applying to claim treaty benefits without filing a return or for certain informational reporting requirements. If you are filing a tax return, ensure it is complete and accurate, as any errors can delay the processing of both your ITIN and your tax return.
Processing Times and Costs
The IRS does not charge a fee to apply for an ITIN. However, if you use a Certified Acceptance Agent (CAA) service, there may be a fee charged by the CAA for their assistance. The time it takes to receive an ITIN can vary significantly. Currently, the IRS estimates that it can take anywhere from 7 to 14 weeks to process a Form W-7 application submitted directly to them. This timeline can be longer during peak tax seasons. When applying through a CAA, the initial verification process with the agent is usually much faster, and the application is then forwarded to the IRS. While the IRS processing time remains the same, using a CAA can help avoid common errors that might cause delays.
It is important to apply well in advance of any tax deadlines to ensure you receive your ITIN in time. The IRS will send you a notification letter with your ITIN, often referred to as CP-565, ITIN Assignment Letter. Once you have your ITIN, you can use it for all future tax filings.
Common Mistakes and How to Avoid Them
Several common mistakes can lead to delays or rejections when applying for an ITIN:
- Incomplete Form W-7: Ensure all fields on the Form W-7 are filled out accurately and completely. Missing information or incorrect details are primary reasons for delays.
- Incorrect or Unacceptable Documentation: Submitting expired identification, documents that do not meet IRS requirements, or failing to provide certified copies when required can cause issues. Always verify the latest IRS guidelines for acceptable documents.
- Missing Tax Return: For most applicants, failing to attach a complete and accurate U.S. federal income tax return with Form W-7 is a critical error. Ensure your tax return is properly signed and dated.
- Not Eligible for an ITIN: Applying for an ITIN when you are eligible for an SSN is a common oversight. The IRS will deny an ITIN application if they determine you are eligible for an SSN. You must apply for an SSN first in such cases.
- Errors in Tax Return: If the attached tax return contains errors, it will delay the processing of both the ITIN and the tax return. This can impact refunds or tax liabilities.
Using a Certified Acceptance Agent can help mitigate these common mistakes by providing expert guidance and reviewing your application before submission. This is where services like itin.net can be particularly valuable for applicants unfamiliar with the U.S. tax system.
What Happens After You Get Your ITIN?
Once you receive your ITIN from the IRS (via CP-565), you can use it for all tax-related purposes. This includes filing your U.S. federal income tax return annually. If you are a non-resident alien with U.S. source income, you will likely continue to file Form 1040-NR, U.S. Nonresident Alien Income Tax Return. If you are a foreign owner of a U.S. business, such as a single-member U.S. LLC, and you don't have an SSN, you might use your ITIN for reporting purposes, such as filing Form 5472 to report transactions between the LLC and its owner. It's important to note that an ITIN does not grant you the right to work in the United States. It is solely for tax processing purposes.
ITINs do not automatically expire, but they do become inactive if you do not file a U.S. federal tax return for three consecutive tax years. The IRS may also retire ITINs based on the tax year they were issued and whether they have been used. If your ITIN becomes inactive, you will need to reapply using Form W-7 when you next need to file a U.S. tax return. Renewal is done by submitting a new Form W-7 application, typically with a tax return. The IRS usually sends a notice, such as CP-48, to taxpayers whose ITINs are scheduled for renewal.
ITIN vs. SSN in U.S. Business and Banking
While an SSN is a gateway to employment and broader financial opportunities in the U.S., an ITIN serves a more specific tax compliance role. For foreign nationals looking to establish a U.S. business presence, such as forming a U.S. LLC, an ITIN can be essential. For instance, if you form a single-member U.S. LLC and are not eligible for an SSN, you will need an ITIN to file Form 5472 annually. This form is critical for reporting certain transactions between the LLC and its foreign owner and carries significant penalties for non-compliance. You may also need an ITIN to open a U.S. bank account, although requirements vary by bank. Some U.S. banks may allow opening an account with just a passport and a foreign address, while others might require an ITIN or an EIN (Employer Identification Number) for business accounts. Obtaining an EIN, which is for businesses, can sometimes be done without an SSN or ITIN, but using an ITIN for your personal tax identification can be a necessary step in the overall process of setting up and managing U.S. business interests. For example, when opening a business bank account with providers like Mercury or Relay, an ITIN might be requested alongside other documentation, especially if you do not have an SSN. Understanding the difference between an SSN and an ITIN is the first step in ensuring you meet all U.S. tax and business obligations.