When you’re a non-resident living in the U.S., this means you have to do things a little bit differently than others. In this blog, you’ll find out in which scenarios you will need to obtain an ITIN.
If you aren’t eligible for a Social Security Number (SSN), for the tax related things you need to have the ITIN (Individual Taxpayer Identification Number). This way you can stay compliant with the IRS.
Our guide explains ITIN numbers, who is eligible for them, how non-residents can get them, and, above all-how to avoid common mistakes and still comply with U.S. tax laws.
What Is an ITIN Number?
The U.S. Internal Revenue Service (IRS) issues an ITIN (Individual Taxpayer Identification Number) as a tax processing number.
ITIN meaning: An ITIN is a 9-digit number, formatted like an SSN, used only for federal tax reporting purposes.
What an ITIN Is NOT
An ITIN:
- Is not a work permit
- Does not grant immigration status
- Does not authorize employment
- Does not lead to a green card
Its only purpose is U.S. tax compliance.
What Is an ITIN Number Used For?
You may need an ITIN if you:
- Must file a U.S. tax return as a non-resident
- Own or invest in a U.S. LLC or corporation
- Receive U.S. rental income
- Earn U.S.-source income without an SSN
- Are a foreign owner of a U.S. business
- Need to report income under IRS rules (such as Form 5472)
Who Needs an ITIN? (Including Non-Residents)
ITIN is required in several different situations. If a non-resident is required to file a U.S. tax return, he or she must obtain ITIN first. For foreign investors, ITIN is also key, in case they want to invest in real estate or businesses. Also every non-resident company owner needs ITIN because their company comes with U.S. tax obligations.
We also must mention two crucial points here as well. If you have a spouse or children who don’t qualify for an SSN, they will need their own ITINs to be included on your tax return. Moreover, if you are eligible for a Social Security Number, you cannot apply for an ITIN instead.
How to Get an ITIN Number for Non-Residents
Step 1: Completing IRS Form W-7
Form W-7 is the official ITIN application.
You must select the correct reason category (for example, non-resident filing a U.S. tax return).
Step 2: Providing Valid Identification Documents
You must submit original documents or IRS-certified copies, such as:
- Passport (most common and usually sufficient on its own)
- National ID card plus birth certificate (in limited cases)
Photocopies are not accepted unless officially certified.
Step 3: Submitting a U.S. Federal Tax Return (Usually Required)
In most cases, Form W-7 must be submitted together with a U.S. tax return, unless a specific IRS exception applies.
This is one of the most common reasons ITIN applications are rejected.
Step 4: Choosing the Correct Submission Method
You may apply:
- By mail directly to the IRS
- Through an IRS-authorized Certifying Acceptance Agent (CAA)
- In limited cases, in person at an IRS Taxpayer Assistance Center
How Long Does It Take to Get an ITIN?
This is one of the questions we get asked a lot because, in some cases, people need to obtain their ITIN within a certain timeframe so that they are compliant with the IRS.
The standard processing time is between 6–10 weeks. However, if you apply during the peak tax season, then it can take up to 12 weeks or even longer.
Although the process is clear-cut, if you made an error during your application or there are missing documents, your approval can be significantly delayed. If you need to get your ITIN by a specific date, it would be advisable to get professional help.
Common ITIN Application Mistakes
The most common mistakes we come across are choosing the incorrect eligibility category and applying for an ITIN when an SSN is needed. Submitting uncertified copies of identity documents or filing Form W-7 without a legal tax filing requirement are also basic but frequent mistakes. Trying to use an ITIN for immigration or employment purposes is also another one.
These errors frequently lead to lost time and IRS rejection warnings, and if you are not sure about your ITIN application, we advise you to seek professional legal help.
How to Apply for an ITIN Correctly
If you are researching:
- How to apply for an ITIN
- How to get an ITIN number for non-residents
the key is ensuring your application aligns with:
- Your tax filing obligation
- Your income source
- Your business or investment structure
An ITIN application is not just a form, it is a tax compliance filing.
Does an ITIN Expire?
Yes. If an ITIN is not used to file a federal tax return for a period of three consecutive years, it may expire. In such a case, you need to obtain a new ITIN.
Frequently Asked Questions
- 1. What is an ITIN number?
ITIN numbers are tax identification numbers provided by the IRS to people who need to file taxes in the U.S. but do not qualify for an SSN. - 2. What is an ITIN used for?
You can use your ITIN number only for tax reporting and tax compliance. - 3. Can a non-resident get an ITIN number?
Yes, absolutely. If non-residents need their own ITIN for investment, tax, and business purposes. - 4. How do non-residents apply for an ITIN?
To obtain an ITIN, you have to file W-7 along with proof of identification and the requisite tax document. - 5. Does an ITIN allow me to work in the U.S.?
No. An ITIN is only used for the matters we mentioned above. It does not allow you to work or receive immigration benefits.
Final Notes
Every non-resident in the U.S. with tax obligations, should start their ITIN application as soon as possible. Taking care of this step early helps you avoid potential fines and processing delays, which is particularly important if you are managing a business or active investments.
