Gokce Tandogdu
ITIN Specialist, itin.net
Most individuals who are not eligible for a Social Security Number (SSN) but have U.S. tax obligations must obtain an Individual Taxpayer Identification Number (ITIN) to file their U.S. federal income tax returns. The question of who files taxes with an ITIN is broad, but generally, any non-resident alien or foreign national who needs to file a U.S. tax return and cannot obtain an SSN is required to get an ITIN. This includes individuals earning U.S. source income, those claiming tax treaty benefits, or those who are dependents or spouses of U.S. taxpayers. The ITIN is issued by the Internal Revenue Service (IRS) solely for tax reporting purposes and does not authorize employment in the United States or provide eligibility for Social Security benefits.
Who is Required to Obtain an ITIN?
An ITIN is necessary for individuals who have a U.S. tax filing requirement and do not have, and are not eligible to get, an SSN. This encompasses a wide range of scenarios for non-residents and foreign nationals. The core principle is that if the IRS needs to track your U.S. tax liability and you cannot use an SSN, you will need an ITIN. Eligibility is determined by the need to file a U.S. federal tax return or to claim certain tax benefits. It's important to understand that an ITIN is not an alternative to an SSN for employment purposes. Its sole function is to facilitate U.S. tax compliance for those without SSN eligibility.
Non-Resident Aliens with U.S. Income
Non-resident aliens who earn income from U.S. sources are generally required to file a U.S. federal income tax return. Examples include income from U.S. real estate, business conducted in the U.S., or certain types of investment income. If these individuals do not have an SSN, they must apply for an ITIN using Form W-7, Application for IRS Individual Taxpayer Identification Number. The tax return itself, typically Form 1040-NR, U.S. Nonresident Alien Income Tax Return, must be filed concurrently with or after the ITIN application is submitted to the IRS. The ITIN is then used to identify the taxpayer on all tax filings.
Individuals Claiming Tax Treaty Benefits
Foreign nationals who are eligible for benefits under a U.S. tax treaty may need an ITIN. Tax treaties often reduce or eliminate U.S. tax withholding on certain types of income, such as dividends, interest, or royalties. To claim these treaty benefits, the individual must file a U.S. tax return or a specific form (like Form W-8BEN for certain passive income, or other forms depending on the income type) with the IRS, often accompanied by a statement detailing the treaty claim. If an SSN is not available, an ITIN is required for this process. The IRS uses the ITIN to track the application of treaty provisions and ensure compliance. Without an ITIN, the payer of the income may be required to withhold U.S. taxes at the standard statutory rates.
Dependents and Spouses of U.S. Taxpayers
In certain situations, a dependent or spouse of a U.S. taxpayer may need an ITIN. For instance, if a foreign national spouse or dependent has U.S. source income and needs to file their own U.S. tax return, or if they are claimed as a dependent on a U.S. taxpayer's return and the return preparer needs to meet certain requirements to claim them, an ITIN may be necessary. This is particularly relevant for claiming certain tax credits or deductions that require the dependent or spouse to have a U.S. taxpayer identification number. A common scenario is when a U.S. citizen or resident alien is married to a non-resident alien who has U.S. source income and they choose to file a joint return, which requires both spouses to have an SSN or ITIN.
Foreign Investors and Business Owners
Foreign investors and individuals involved in U.S. business ventures often require an ITIN. This can include those who own U.S. rental properties, hold investments generating U.S. income, or are partners in U.S. partnerships. If these individuals are not U.S. citizens or eligible for an SSN, an ITIN is essential for tax reporting. For example, a foreign national owning a U.S. business, such as a U.S. LLC, may need 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. This form requires the filer to have an ITIN or an Employer Identification Number (EIN) if the LLC has elected to be taxed as a corporation. Even if the LLC itself obtains an EIN, the responsible foreign individual may still need an ITIN for other tax reporting obligations. Opening a U.S. bank account for such entities may also be facilitated by having an ITIN for the responsible foreign individual, though the entity itself will typically need an EIN.
How to Apply for an ITIN
Applying for an ITIN involves submitting Form W-7 to the IRS. There are three primary methods to apply: by mail, through an IRS Taxpayer Assistance Center (TAC), or via an IRS-authorized Certified Acceptance Agent (CAA). Each method has specific requirements and processing times. The application must be accompanied by original identification documents or certified copies from the issuing agency, along with the federal tax return that necessitates the ITIN. The IRS reviews the application and, if approved, issues a letter containing the ITIN. The processing time can vary significantly depending on the method chosen and the current IRS workload.
Application by Mail
To apply by mail, you send Form W-7 and all supporting documents directly to the IRS address specified in the form's instructions. This typically includes your original or certified copies of identification documents (such as a passport) and a U.S. federal income tax return. The advantage of mailing directly is that you retain your original documents. However, this method generally has the longest processing time, as the IRS must review your entire submission and mail back your identification documents. This process can take up to 10-12 weeks or longer during peak tax seasons.
Application via IRS Taxpayer Assistance Center (TAC)
Certain IRS Taxpayer Assistance Centers (TACs) offer in-person ITIN application services. You must schedule an appointment and bring your completed Form W-7, your tax return, and your original identification documents to the TAC. The IRS staff at the TAC will verify your identity and review your application. If they accept it, they will forward it to the ITIN Operation for processing. This method allows for quicker verification of your documents, as they are reviewed on the spot, and your original documents are returned to you immediately. However, appointment availability can be limited, and processing still takes several weeks.
Application via Certified Acceptance Agent (CAA)
Using an IRS-authorized Certified Acceptance Agent (CAA) is often the most convenient method. A CAA, such as itin.net, is an individual or entity authorized by the IRS to assist taxpayers in obtaining ITINs. When you apply through a CAA, they will review your Form W-7, verify your original identification documents, and transmit the application package to the IRS on your behalf. A significant benefit 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 significantly reduces the risk of losing your original identification. The CAA forwards the application to the IRS, and the IRS will mail the ITIN confirmation letter directly to you. This process can sometimes be faster than mailing directly, and it offers the peace of mind that your documents have been properly authenticated by an intermediary.
What Identification Documents Are Required?
The IRS requires specific identification documents to process a Form W-7 application. The primary document accepted is a valid, unexpired passport. If you do not have a passport, a combination of other documents may be used, but these must be presented in a specific order and meet strict criteria. All documents must clearly show your name, photograph, current address, and date of birth. The IRS will only accept original documents or certified copies issued by the agency that produced the document (e.g., a certified copy of a birth certificate from the vital records office).
Primary Identification Document
A valid, unexpired passport is the preferred and most straightforward identification document for ITIN applications. It serves as proof of identity and nationality. If you submit a passport, you generally do not need to submit additional documents to prove identity and foreign status. If you are applying as a dependent and do not have a passport, you may need to submit a birth certificate along with other identity documents.
Alternative Identification Documents
If a passport is not available, a combination of other documents can be used to meet the requirements for identity and foreign status. These typically include: a national identity card that includes name, photograph, address, date of birth, and expiration date; a foreign driver's license; a civil birth certificate; a foreign voter's registration card; a national health insurance card; a valid U.S. state driver's license; a foreign military identification card; a military dependent's identification card; a visa; a U.S. citizenship and Immigration Services (USCIS) photo identification; or a U.S. tribal national identification card. When using alternative documents, you must typically present at least two documents: one to prove identity and one to prove foreign status, unless a specific document like a birth certificate is used in conjunction with other identity proofs. For example, a birth certificate combined with a driver's license might be acceptable. It is crucial to consult the Form W-7 instructions for the exact combinations and requirements.
Processing Times and Potential Delays
ITIN applications are subject to IRS processing times, which can fluctuate based on workload and time of year. Generally, it takes the IRS approximately 7 to 10 weeks to process an ITIN application submitted by mail or through a TAC. Applications submitted via a CAA may sometimes see slightly faster initial processing, but the overall IRS review time remains the primary factor. During peak tax season (January through April), processing times can extend significantly, sometimes up to 14 weeks or more. It is advisable to apply well in advance of any tax filing deadlines to avoid issues. If your application is incomplete or contains errors, it will be rejected, and you will need to reapply, causing further delays. The IRS will notify applicants of any issues with their application.
Common Mistakes When Applying for an ITIN
Several common mistakes can lead to delays or rejections of ITIN applications. Ensuring accuracy and completeness is key. One frequent error is failing to include a complete and signed U.S. federal income tax return with the Form W-7 application, unless applying under specific exceptions (e.g., for dependents or treaty benefits without a filing requirement). Another common mistake is submitting uncertified copies of identification documents or documents that have expired. Incomplete or inaccurate personal information, such as a misspelled name or incorrect date of birth, can also cause problems. Not following the specific document combination rules for alternative identification can lead to rejection. Finally, errors in the tax return itself can cause the IRS to reject the ITIN application, as the ITIN is issued for the purpose of processing that tax return.
What Happens After You Receive Your ITIN?
Once you receive your ITIN from the IRS, typically via a CP-565 notice, you can use it for all future U.S. tax filings. This includes filing your annual federal income tax return and any other required tax forms. Remember that an ITIN is not a substitute for an SSN and does not grant work authorization. If your circumstances change and you become eligible for an SSN, you must obtain one and then use it for all tax purposes, discontinuing the use of your ITIN. ITINs generally do not expire, but the IRS has implemented a renewal program for certain expired ITINs. If your ITIN has not been used on a federal tax return for three consecutive tax years, it will expire. Additionally, the IRS periodically updates its list of ITINs that require renewal based on their issuance date. Taxpayers whose ITINs are expiring or have expired must renew them to continue filing U.S. taxes. The renewal process is similar to the initial application, requiring Form W-7 and updated identification documents.
When to Seek Professional Assistance
While the ITIN application process can be managed independently, seeking professional assistance can be beneficial, especially for complex situations. Certified Acceptance Agents (CAAs), like those at itin.net, can guide you through the application process, help ensure all documentation is correct, and verify your original identification documents, saving you the trouble of mailing them. If you have complex U.S. tax obligations, such as significant foreign investments, U.S. business ownership, or intricate treaty claims, consulting a qualified tax professional or an enrolled agent is highly recommended. They can help you determine your U.S. tax residency status, identify all filing requirements, and ensure you are claiming all eligible deductions and credits. For those forming a U.S. LLC or needing an EIN for their business, integrating the ITIN application with these other steps can be streamlined by working with specialists who understand the entire U.S. business setup and tax compliance landscape. Understanding who files taxes with an ITIN is just the first step; navigating the subsequent tax and business requirements often benefits from expert guidance. Visit our About page to learn more about our specialists.