Skip to main content
itin.net
Get Started
ITINAsked

What is a 9 digit ssn or itin?

A 9-digit SSN or ITIN is a unique taxpayer identification number issued by the U.S. government for tax purposes. Learn who needs one and how to apply.

1 Answer

  1. Best Answer

    A 9-digit Social Security number (SSN) or Individual Taxpayer Identification Number (ITIN) is the unique identifier assigned by the U.S. government to individuals for tax administration purposes. You need one of these numbers if you have U.S. tax obligations or are claiming tax treaty benefits. The format for both an SSN and an ITIN is always XXX-XX-XXXX, totaling nine digits. The core purpose of these numbers is to track tax filings and payments accurately. Understanding what a 9 digit ssn or itin is forms the basis for navigating U.S. tax requirements for non-residents and foreign nationals.

    Who Needs a 9-Digit SSN or ITIN?

    Eligibility for an SSN or ITIN depends on your U.S. tax status and filing requirements. Most individuals who need to file a U.S. federal income tax return, or who are eligible to claim certain tax benefits or treaty benefits, will require one of these nine-digit numbers.

    Social Security Numbers (SSNs)

    SSNs are primarily issued to U.S. citizens, permanent residents (green card holders), and temporary (working) foreign residents who are authorized to work in the United States. If you have work authorization from the Social Security Administration (SSA), you would apply for an SSN through the SSA, not the IRS. An SSN is the primary identifier for earning income and paying Social Security and Medicare taxes.

    Individual Taxpayer Identification Numbers (ITINs)

    An ITIN is issued by the Internal Revenue Service (IRS) to individuals who are not eligible for an SSN but have a U.S. tax filing requirement or are claiming tax treaty benefits. This includes:

    • Non-resident aliens who need to file a U.S. tax return (e.g., earning U.S. source income not subject to sufficient withholding).
    • U.S. resident aliens (under certain circumstances) who are not eligible for an SSN.
    • Dependents or spouses of U.S. citizens or resident aliens who cannot get an SSN.
    • Individuals who need to open a U.S. bank account or form a U.S. LLC and are not eligible for an SSN. While not strictly required by all banks or state registration authorities, many financial institutions and business formation services prefer or require a U.S. taxpayer identification number for account opening or business registration. For example, opening a /bank-account often requires an SSN or ITIN.
    • Individuals claiming tax treaty benefits to reduce U.S. tax on U.S. source income.

    How to Apply for an ITIN

    Applying for an ITIN involves submitting Form W-7, Application for IRS Individual Taxpayer Identification Number, to the IRS. You must also include original documentation or certified copies of your identity and foreign status. The most common documents submitted are passports and birth certificates. Your application must be accompanied by a valid federal tax return, unless you qualify for an exception.

    Required Documentation for Form W-7

    When applying for an ITIN via Form W-7, you need to provide proof of identity and foreign status. You have two main options for submitting your application and supporting documents:

    1. Mail your application directly to the IRS: Send your completed Form W-7, your original tax return, and original or certified copies of your identification documents to the IRS address listed in the Form W-7 instructions. This method requires you to mail your original passport or other primary identification documents, which can take a significant amount of time to get back.
    2. Apply through a Certified Acceptance Agent (CAA): A CAA is an individual or entity authorized by the IRS to help taxpayers apply for ITINs. CAAs can verify your original documentation and forward your application to the IRS. This is often the preferred method because CAAs can return your original documents to you on the same day, avoiding the risk of mailing them. itin.net operates as a service that assists individuals in connecting with CAAs or navigating the application process directly.

    Exceptions to Filing a Tax Return with Form W-7

    While a federal tax return is typically required, there are exceptions. These include situations where you are applying for an ITIN to claim treaty benefits, to establish residency for tax purposes under specific IRS rules, or for other specific reasons outlined by the IRS. You will need to check the current Form W-7 instructions to determine if you qualify for an exception and what additional documentation or forms might be necessary.

    What Information is Needed for Form W-7?

    To complete Form W-7, you will need to provide personal information and supporting documentation. The core information required includes:

    • Full Legal Name: As it appears on your identification documents.
    • Foreign Address: Your permanent address outside the United States.
    • U.S. Address (if applicable): If you have a U.S. mailing address.
    • Date of Birth: Must match your identification documents.
    • Country of Citizenship:.
    • Identification Document: Details of the document you are using for proof of identity and foreign status (e.g., passport number, country of issuance, expiration date).
    • Tax Return Information: If you are filing a tax return concurrently, you will need to provide details from it.

    Documents for Proof of Identity and Foreign Status

    The IRS accepts various documents to prove your identity and foreign status. You must submit at least one document that shows both. The most commonly accepted documents are:

    • U.S. Passport: Unexpired or expired within the last 10 years, showing your name, photograph, and relevant identifying information.
    • National Identity Card: Must show your name, photograph, date of birth, and expiration date.
    • U.S. Driver's License:.
    • Birth Certificate: Must be issued by the relevant authority, show your name, date of birth, and place of birth. For applicants under 18, a birth certificate is often the preferred primary document.
    • Foreign Driver's License:.
    • Foreign Military Identification Card:.
    • Visa:.
    • Civil Birth Certificate:.
    • National Health Insurance Card:.
    • Voter's Registration Card:.

    You can submit either one original document from the 'A' list (e.g., passport) or two documents from the 'B' list (e.g., birth certificate and a foreign driver's license). All documents must be current and contain the required information. Documents not in English must be accompanied by a certified English translation.

    Processing Times and Costs

    The IRS does not charge a fee to apply for an ITIN. However, there are costs associated with gathering the required documentation, such as obtaining certified translations or potentially traveling to a CAA. The processing time for an ITIN application can vary significantly.

    • IRS Direct Mail: When you mail your Form W-7 and supporting documents directly to the IRS, you can expect processing times of 10 to 17 weeks. This timeframe does not include the time it takes to receive your original documents back from the IRS.
    • Certified Acceptance Agent (CAA): Applying through a CAA is generally much faster for the applicant, as the agent can verify your documents immediately and forward the application. The IRS processing time after receiving the application from the CAA is typically 4 to 6 weeks, though this can fluctuate during peak tax seasons.

    These timelines are estimates and can be longer during busy periods, such as the lead-up to the tax filing deadline. You can check your ITIN application status by calling the IRS toll-free at 800-829-1040 after the estimated processing time has passed.

    Common Mistakes When Applying for an ITIN

    Several common errors can delay or result in the rejection of your ITIN application. Being aware of these can help streamline the process.

    • Incomplete Form W-7: Missing information, such as a missing signature or incorrect address, is a frequent issue.
    • Incorrect or Missing Tax Return: Failure to include a valid federal tax return with your Form W-7 (unless an exception applies) is a primary reason for rejection. Ensure the tax return is complete and accurate.
    • Insufficient or Unacceptable Documentation: Not providing the correct types of identification documents, or submitting documents that are expired, not original, or not certified copies (if required), will cause problems. Ensure your documents meet the IRS requirements, including certified translations for non-English documents.
    • Using an Expired ITIN: ITINs issued after 2013 need to be renewed every five years, or if certain digits in the ITIN have expired based on IRS notice. An expired ITIN cannot be used for tax filing. If your ITIN has expired, you must renew it using Form W-7R.
    • Not UnderstandingCAA Procedures: If applying through a CAA, ensure you understand their specific procedures for document verification and submission. Some CAAs may charge a service fee.

    What Happens After You Get Your ITIN?

    Once your ITIN application is approved, the IRS will mail you an ITIN assignment letter. This letter confirms your nine-digit number. You can then use this ITIN for all future U.S. tax filings. If you are establishing a U.S. business, you may need to use your ITIN for other purposes as well.

    • Filing U.S. Taxes: You will use your ITIN on your U.S. federal income tax return (e.g., Form 1040-NR for non-resident aliens). If you have U.S. business activities, you might also need to file Form 5472 to report transactions with a /llc (U.S. limited liability company) that you own. This form is critical for reporting related-party transactions and is often filed alongside Form 1120, the U.S. Corporation Income Tax Return, or Form 1065, U.S. Return of Partnership Income, if you have partnership interests.
    • Opening U.S. Bank Accounts: Many U.S. financial institutions require a taxpayer identification number to open an account. Your ITIN can often be used for this purpose, facilitating your financial activities in the U.S. This is particularly useful if you are forming a /llc or planning to conduct business in the U.S.
    • Obtaining an EIN: If your U.S. business activities require an Employer Identification Number (EIN), you can often apply for one using your ITIN. An EIN is a nine-digit number assigned by the IRS to business entities for tax administration purposes. You can apply for an EIN directly on the IRS website or through services like itin.net's /ein application service. If you are forming a U.S. LLC, an EIN is typically required.

    When to Seek Professional Help

    While the ITIN application process is designed to be manageable, complex situations can arise. If you are unsure about your tax obligations, the documentation required, or if you are facing unique circumstances, consulting with a qualified tax professional or an IRS-authorized Certified Acceptance Agent is advisable. For those looking to establish a U.S. presence through an LLC, obtaining an EIN, or opening a U.S. bank account, itin.net offers resources and services to guide you through these interconnected processes. Our /about page features Gokce Tandogdu, an ITIN Specialist, who provides expertise in these areas.

    8 found this helpful