How many digits is itin?

Question

ITINMay 25, 2026

How many digits is itin?

An ITIN has 9 digits. Learn why you need one, how to apply, and what to expect from the IRS.

— Anonymous

1 Answer

Gokce Tandogdu ITIN Specialist, itin.net May 25, 2026 · Accepted Answer · 2026-05-25

An Individual Taxpayer Identification Number (ITIN) has 9 digits. These numbers are assigned 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, a Social Security Number (SSN). The structure of an ITIN is similar to that of an SSN, consisting of nine digits formatted as XXX-XX-XXXX. The first digit of an ITIN can never be a 9, and it cannot be 000, 666, or 900-920. For example, an ITIN might look like 9XX-7X-XXXX, where the X's represent other valid digits. Knowing how many digits is itin is the first step in understanding the application process and its implications for your U.S. tax obligations and financial activities.

Understanding the Purpose of an ITIN

An ITIN serves a critical function for non-residents and foreign nationals who have U.S. tax obligations or engage in U.S. financial transactions but are ineligible for an SSN. These situations often arise when you need to file a U.S. federal income tax return, claim tax treaty benefits, or comply with specific reporting requirements, such as those related to U.S. business ownership. For instance, if you are a non-resident alien with U.S. source income that is subject to U.S. tax withholding, you will likely need an ITIN to file your tax return (Form 1040-NR) to report this income and potentially claim a refund or calculate any remaining tax liability. Without an ITIN, you might be subject to higher withholding rates and unable to access deductions or credits you may be entitled to. The IRS uses the ITIN to track tax filings and ensure compliance with U.S. tax laws. It is important to understand that an ITIN does not authorize you to work in the United States, nor does it provide eligibility for Social Security benefits.

Who Needs an ITIN?

The need for an ITIN typically arises in several common scenarios for foreign nationals and non-residents. You will generally require an ITIN if you are:

Filing a U.S. Federal Income Tax Return: This is the most frequent reason. If you have U.S. source income (e.g., from investments, rental properties, or business activities) and are required to file a U.S. tax return (Form 1040-NR), you will need an ITIN. Even if your U.S. income is fully covered by withholding, you might still need an ITIN to file for a refund if you are eligible for treaty benefits or deductions.
Claiming Tax Treaty Benefits: The U.S. has tax treaties with many countries to avoid double taxation. To claim reduced withholding rates or exemptions on certain types of U.S. income as provided by a tax treaty, you usually need to provide your ITIN to the withholding agent and on your tax return.
Operating a U.S. Business Entity: If you are a foreign national and own a U.S. business, such as a U.S. LLC, you may need an ITIN for yourself or the entity. For example, if you are the sole member of a U.S. LLC that is a disregarded entity for U.S. tax purposes and you are a non-resident alien, you may need to file Form 5472, Information Return of a U.S. Corporation or a Foreign Corporation Engaged in a Trade or Business in the United States, along with Form 1120-F (if applicable), and potentially your own Form 1040-NR. While an EIN is typically required for the LLC itself, an ITIN might be necessary for the foreign owner's personal tax filings related to the business income.
Opening a U.S. Bank Account: While not always strictly required by every bank, some U.S. financial institutions may ask for an ITIN as a form of identification for opening a U.S. bank account, especially if you do not have an SSN. Having an ITIN can facilitate this process and ensure compliance with financial regulations.
Applying for a Mortgage or Other Loans: In some cases, lenders may require an ITIN for non-residents applying for mortgages or other forms of credit in the U.S.
Receiving Distributions from Estates or Trusts: If you are a beneficiary of a U.S. estate or trust and receive income, you may need an ITIN to report this income.

It is crucial to distinguish an ITIN from an EIN. An EIN is for businesses, while an ITIN is for individuals. The question of how many digits is itin is straightforward, but understanding why you need one requires considering these various U.S. tax and financial engagement scenarios.

Applying for an ITIN: The Process

The application for an ITIN is made using Form W-7, Application for IRS Individual Taxpayer Identification Number. This form is submitted directly to the IRS, or through an authorized IRS Acceptance Agent. The IRS requires specific documentation to verify your identity and foreign status. You cannot simply request an ITIN; you must apply for it in conjunction with a U.S. federal income tax return (unless you qualify for an exception).

Required Documentation

To apply for an ITIN, you must provide original or certified copies of documents that prove your identity and foreign status. The IRS has specific requirements for acceptable documentation. The most commonly accepted documents include:

Passport: This is the preferred primary identification document as it proves both identity and foreign status.
National Identity Card: Must show name, photograph, address, date of birth, and expiration date.
U.S. Driver's License: Must have a photograph, name, U.S. address, and date of birth.
Birth Certificate: For applicants under 18. Must be original or certified copy.
Foreign Driver's License: Must have a photograph, name, foreign address, and date of birth.
Foreign Military Identification Card: Must have a photograph, name, and date of birth.
Visa: Must show name, photograph, expiration date, and immigration status.
Alien Registration Card: Must show name, photograph, and signature.
Medical Records: For dependents under 6 (if applicable).
School Records: For dependents under 18 (if applicable).

If your primary identification document (like a passport) does not include a photograph, you must submit a secondary document that does. If your identity document does not show a foreign status, you must also submit a secondary document proving foreign status. The IRS will review these documents and, if approved, will issue you an ITIN. It's important to note that the IRS will not keep your original documents; they will be returned to you. If you use a Certified Acceptance Agent(CAA), they can review your original documents and forward certified copies to the IRS, saving you the need to mail your originals.

Submission Methods

There are three primary ways to submit your Form W-7 application:

Mail Directly to the IRS: You can mail your completed Form W-7, along with your U.S. federal income tax return and copies of your identification documents, to the IRS address specified in the Form W-7 instructions. This method requires sending your original identification documents through the mail, which can be a concern for many applicants. The IRS will return your documents, but this process can take time.
Through a Certified Acceptance Agent (CAA): This is often the most convenient method. CAAs are individuals or entities authorized by the IRS to help taxpayers apply for ITINs. They can verify your original identification documents and forward certified copies to the IRS. Using a CAA means you do not have to mail your original documents to the IRS, and they can often expedite the process. itin.net is an authorized Certified Acceptance Agent, simplifying the ITIN application for individuals worldwide.
In Person at an IRS Taxpayer Assistance Center (TAC): Some IRS TACs offer ITIN application services by appointment. You must schedule an appointment in advance and bring your original documentation. However, availability can be limited, and not all TACs provide this service. You will still need to bring your tax return with you.

The Tax Return Requirement

Generally, you must file a federal income tax return with your Form W-7 application. This means you must have a U.S. tax liability or be seeking a refund or treaty benefit. However, there are exceptions. For instance, individuals applying for an ITIN solely to comply with Form 5472 reporting requirements for a U.S. LLC may not need to file a personal tax return simultaneously, but they must meet other specific criteria outlined by the IRS. It is always best to review the Form W-7 instructions or consult with a tax professional to understand if you qualify for an exception.

Processing Times and Costs

Applying for an ITIN involves specific timeframes and potential costs, though the ITIN itself is free.

IRS Processing Times

The IRS processing times for ITIN applications can vary significantly depending on the volume of applications they receive. Currently, the IRS estimates that it can take anywhere from 7 to 11 weeks from the date of application to receive your ITIN. This timeframe begins once the IRS has received a complete and accurate application package. During peak tax seasons (typically January through April), processing times may be longer. If you apply through a CAA, their verification process might be quicker, but the IRS's final processing time remains largely the same. It is advisable to apply well in advance of any tax deadlines to avoid delays.

Costs Associated with ITINs

The IRS does not charge any fee to apply for an ITIN. Form W-7 is free. However, there can be indirect costs involved:

Tax Preparation Fees: If you are filing a U.S. tax return, you may incur costs for tax preparation services, especially if your tax situation is complex or you are using a tax professional. If you use a CAA, they may charge a fee for their services in assisting with the Form W-7 application and verifying your documents. The fees charged by CAAs can vary widely.
Document Certification Fees: If you choose to have your documents certified by a third party (other than a CAA or the IRS), there might be associated costs.
Travel Costs: If you choose to apply in person at an IRS Taxpayer Assistance Center (TAC) or through a CAA located in a different city, you may incur travel and accommodation expenses.

When considering how many digits is itin, remember that while the number itself is simple, the process of obtaining it can involve various logistical considerations and associated costs, particularly if you opt for professional assistance.

Common Mistakes and How to Avoid Them

Applying for an ITIN can seem straightforward, but several common mistakes can lead to delays or rejections. Being aware of these pitfalls can help ensure a smoother application process.

Incomplete Form W-7: Ensure all required fields on Form W-7 are filled out accurately and completely. Missing information, such as a U.S. taxpayer identification number (if applicable) or a valid reason for applying, can cause delays. Double-check your name and address match exactly what appears on your supporting identification documents.
Incorrect or Missing Identification Documents: The IRS has strict rules about acceptable documents. Ensure you are submitting documents that meet all the criteria (e.g., valid, unexpired, containing all required information). If you submit a passport as proof of identity and foreign status, ensure it is valid. If you are using multiple documents, make sure they collectively prove both identity and foreign status as required by the IRS.
Not Including a Tax Return (When Required): For most applicants, Form W-7 must be submitted with a valid federal income tax return. Failing to include the tax return, or including an incomplete or unsigned one, is a common reason for rejection. Ensure your tax return is signed and dated.
Submitting Photocopies Instead of Originals or Certified Copies: When applying by mail, you must submit original identification documents or certified copies from the issuing agency. If you use a CAA, they will verify your original documents and send certified copies. Submitting regular photocopies will lead to rejection.
Incorrectly Claiming Treaty Benefits: If you are applying to claim tax treaty benefits, ensure you correctly identify the treaty article and its provisions. Incorrect claims can lead to issues with your tax return.
Misunderstanding the Purpose of an ITIN: Remember, an ITIN is for tax purposes only and does not grant work authorization or immigration benefits. Applying for an ITIN for incorrect reasons can lead to application denial.

To avoid these mistakes, carefully read the Form W-7 instructions, use the IRS's document checklist, and consider applying through a Certified Acceptance Agent, who can help ensure your application is complete and accurate.

What Happens After You Get Your ITIN?

Once the IRS approves your Form W-7 application and assigns you an ITIN, you will receive an official notice from the IRS, typically a CP-565 notice, which officially assigns your ITIN. This is a crucial document, so keep it in a safe place. The ITIN is permanent and remains valid for life unless it expires or is otherwise deactivated by the IRS. However, the IRS has implemented a renewal program for certain ITINs.

ITIN Renewal

ITINs that have not been used on a federal tax return for three consecutive tax years are considered expired by the IRS and must be renewed before you can file a tax return or claim treaty benefits. Additionally, the IRS has a phased renewal program for ITINs based on the middle digits. For example, ITINs with the middle digits 70-87, 88, and 89 are subject to renewal on a specific schedule. If your ITIN falls into one of these categories and has not been used recently, you will need to apply for renewal using Form W-7 again, along with a valid tax return or an exception. There is no fee to renew an ITIN, but you will need to submit the required documentation and tax return just as you did for the initial application.

Ongoing Tax Obligations

Having an ITIN means you are now part of the U.S. tax system. You must continue to file U.S. federal income tax returns annually if you have U.S. source income or meet other filing requirements. This includes reporting income from U.S. investments, rental properties, or businesses. If you own a U.S. LLC and are a foreign owner, you must continue to file Form 5472 annually, even if the LLC has no effectively connected income with a U.S. trade or business. Failure to meet these ongoing tax obligations can result in penalties from the IRS, including fines and interest. It is also important to keep your contact information updated with the IRS so you can receive important notices, such as tax return confirmations or notices of any discrepancies.

Seeking Assistance with Your ITIN Application

While the information provided here aims to be comprehensive, the process of applying for an ITIN can still be complex, especially for individuals unfamiliar with U.S. tax laws. The IRS offers resources, and professional assistance is readily available.

IRS Resources

The IRS website (IRS.gov) provides extensive information on ITINs, including detailed instructions for Form W-7, FAQs, and lists of acceptable identification documents. Publication 1915, Your ITIN: What It Is and How to Get It, is also a valuable resource. The IRS also operates a toll-free number for international taxpayers, which can be helpful for general inquiries.

Certified Acceptance Agents (CAAs)

As mentioned earlier, CAAs are authorized by the IRS to assist applicants with Form W-7. They play a vital role in verifying your identity and foreign status documents, which can significantly streamline the application process and eliminate the need to mail your sensitive personal documents to the IRS. Using a reputable CAA can provide peace of mind and help ensure your application is submitted correctly. itin.net offers these services to assist individuals worldwide in obtaining their ITINs efficiently.

Tax Professionals and Legal Counsel

For complex tax situations, such as intricate business structures, significant foreign income, or navigating tax treaty benefits, consulting with a qualified U.S. tax professional or an attorney specializing in international taxation is highly recommended. They can provide personalized advice based on your specific circumstances, help you understand your U.S. tax obligations, and ensure compliance with all relevant laws. This is particularly important if you are establishing a U.S. business, as coordinating your ITIN application with the necessary EIN application and U.S. LLC formation is essential for seamless operations.

In summary, an ITIN is a 9-digit number issued by the IRS to individuals who need a U.S. taxpayer identification number but are not eligible for an SSN. While the number of digits is fixed, the process of obtaining it requires careful attention to detail, proper documentation, and understanding your ongoing U.S. tax responsibilities.