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ITIN application reference for OPT workers based in Greece
ITIN15 min read

An ITIN Guide for OPT workers from Greece

OPT workers from Greece often need an ITIN for U.S. tax filing. Learn the process, required documents, and common pitfalls to ensure a smooth application.

Reviewed by , ITIN Specialist at itin.net.

OPT Workers from Greece Face Unique ITIN Hurdles

OPT workers from Greece applying for an ITIN encounter specific challenges distinct from other non-residents. The primary friction point arises from the dual nature of their U.S. presence: they are typically F-1 students completing practical training, which necessitates U.S. tax filings, yet they maintain strong ties to Greece. This often means managing documentation and correspondence across two jurisdictions. Unlike U.S. residents or citizens who have a clear path to a Social Security Number (SSN), OPT workers may find themselves in a grey area where an SSN is expected for employment but not yet secured, creating a need for an ITIN. Furthermore, understanding the U.S. tax treaty benefits between the U.S. and Greece requires careful attention to detail to ensure accurate treaty claims on tax forms.

When OPT Workers from Greece Need an ITIN

An ITIN is required for OPT workers from Greece when they must file a U.S. federal tax return but do not have, and are not eligible for, a Social Security Number (SSN). While most individuals authorized to work in the U.S. on an OPT basis will eventually obtain an SSN, there can be a period where employment begins before the SSN is issued. During this interim phase, employers may require a U.S. tax identification number for payroll purposes, or the individual may need to file a tax return to report U.S. source income. The IRS mandates that any individual receiving U.S. income, such as wages earned during OPT, must report it. If an SSN is not yet available, an ITIN becomes the necessary alternative for filing purposes. Failure to file when required can lead to penalties. You will also need an ITIN if you are claiming tax treaty benefits on U.S. source income and do not have an SSN. The U.S.–Greece tax treaty offers potential benefits, but these often require filing specific tax forms (like Form 1040-NR) to be claimed, necessitating an ITIN.

Essential Documents for Your ITIN Application

Applying for an ITIN involves submitting specific documentation to the IRS. The core form is Form W-7, Application for IRS Individual Taxpayer Identification Number. Alongside the Form W-7, you must provide proof of your identity and foreign status. The most commonly accepted primary document is your valid passport. If your passport is not available, other original identification documents may be accepted, such as a national identity card or a birth certificate, but a passport is strongly preferred. You will also need to include documentation that supports your need for an ITIN, such as a U.S. federal income tax return (e.g., Form 1040-NR for non-resident aliens) that you are filing concurrently. Ensure that the name and any other identifying information on your supporting documents precisely match those on your Form W-7.

The ITIN Application Process for OPT Workers

The ITIN application process can be completed in a few ways, but the most efficient for OPT workers based in Greece is typically through a Certified Acceptance Agent (CAA). You will complete Form W-7, gather your original identification documents, and your U.S. tax return. If applying directly to the IRS at the Austin Submission Processing Center, you must mail your original documents, which can take 10-14 weeks for processing. Using a Certified Acceptance Agent offers a streamlined approach. A CAA, such as itin.net, can verify your original documents and forward your application to the IRS. This method allows you to keep your original passport and other vital documents, as the CAA's certification replaces the need to mail originals. The typical timeline when applying via a CAA is 5–10 business days for IRS review and ITIN assignment, followed by IRS processing of your tax return. The IRS will issue a CP-565, ITIN Assignment Letter, once your ITIN is assigned.

Common Application Mistakes for OPT Workers from Greece

OPT workers from Greece often make specific errors on their ITIN applications. A frequent mistake is failing to accurately claim benefits under the U.S.–Greece tax treaty. This can involve incorrect treaty article numbers or misinterpreting residency requirements for treaty purposes. Another common pitfall is mismatched names. Ensure the name on your Form W-7 exactly matches your passport and any other submitted identification. Discrepancies, even minor ones like a missing middle initial, can cause rejection. Submitting incomplete tax returns or failing to include all required supporting documentation for the Form W-7 is also a common issue. Many OPT workers overlook the need to file a U.S. tax return alongside their ITIN application unless they qualify for an exception, such as applying for an ITIN solely to claim treaty benefits on passive income. Lastly, mailing original identification documents directly to the IRS without using a Certified Acceptance Agent carries the risk of loss or damage, and significantly longer processing times.

Benefits of Using a Certified Acceptance Agent (CAA)

Opting for a Certified Acceptance Agent (CAA), like itin.net, significantly simplifies the ITIN application process for OPT workers from Greece. The primary advantage is that a CAA can authenticate your original identification documents, such as your passport. This means you do not have to mail your original, irreplaceable documents to the IRS. Instead, the CAA reviews them and sends certified copies with your Form W-7 application. This service provides peace of mind and greatly reduces the risk of losing your important documents during transit. Furthermore, CAAs are trained by the IRS to ensure your application is complete and accurate, potentially speeding up the IRS's review process. While the IRS still handles the final ITIN assignment, the CAA's role in verification and submission makes the overall experience smoother and more secure. This is particularly beneficial for individuals who are already managing complex logistics between Greece and the U.S.

Next Steps After Receiving Your ITIN

Once the IRS assigns your ITIN, you will receive a CP-565 letter. This letter confirms your unique nine-digit number. Your next step is to ensure your U.S. federal tax return is processed correctly by the IRS. If you applied for the ITIN concurrently with a tax return, and that return was rejected due to the missing ITIN, you may need to refile it once your ITIN is assigned. It is also crucial to understand any ongoing tax obligations you may have in the U.S. related to your OPT employment or other U.S. income sources. For those who may also require a U.S. bank account to manage their U.S. finances, opening one is often the next practical step. If you anticipate needing to establish a U.S. business entity in the future, such as a U.S. LLC, consider that process as well. Review the pricing for our ITIN services at itin.net or contact us directly for personalized assistance.

Practical tips

  • Ensure your legal name on Form W-7 precisely matches your passport and any other supporting identification documents to avoid rejection.
  • If claiming treaty benefits under the U.S.–Greece tax treaty, carefully review IRS Publication 901 and the specific treaty articles to ensure you meet all eligibility requirements.
  • Always use a Certified Acceptance Agent (CAA) to submit your ITIN application and supporting documents to avoid mailing your original passport to the IRS.
  • If you are employed on OPT, confirm with your employer whether they require an ITIN or an SSN for payroll purposes, and understand the timeline for obtaining each.
  • Keep copies of all submitted documents, including your Form W-7 and supporting identification, for your personal records.

Frequently asked questions

Can I apply for an ITIN from Greece, or do I need to be in the U.S.?

You can apply for an ITIN from Greece. The IRS accepts applications submitted directly by mail or through a Certified Acceptance Agent (CAA). Using a CAA is often preferable as they can verify your original documents without you needing to mail them.

How long does it take to get an ITIN for OPT workers?

When applying through a Certified Acceptance Agent (CAA), the process typically takes 5–10 business days for the IRS to review your application and assign an ITIN. Mailing directly to the IRS can take 10-14 weeks. This timeframe is in addition to the processing time for your U.S. tax return.

What if my OPT employment starts before I get my SSN or ITIN?

Your employer may allow you to start work with a temporary tax identification number. However, you must file a U.S. tax return reporting your income. If you don't have an SSN, you will need to apply for an ITIN using Form W-7. It is advisable to consult with your employer's HR department and consider professional tax advice.

Do I need an ITIN if I only have U.S. source income from my OPT and am a tax resident of Greece?

Yes, if you have U.S. source income during your OPT period and are not eligible for an SSN, you generally need an ITIN to file a U.S. federal tax return. You may also need it to claim benefits under the U.S.–Greece tax treaty. Confirm your specific filing requirements with a qualified tax professional.

Can I use a Greek national ID as proof of identity for my ITIN application?

While a Greek national ID might be accepted in some cases, the IRS strongly prefers a valid U.S. visa or, most commonly, your valid passport as proof of identity and foreign status for an ITIN application. Always check the latest IRS guidelines for acceptable documents.

What happens if my Form W-7 is rejected?

If your Form W-7 is rejected, the IRS will typically send you a letter explaining the reason. Common reasons include incomplete information, missing supporting documents, or discrepancies in names. You will need to correct the issues and resubmit your application. Working with a Certified Acceptance Agent can help minimize the chances of rejection.

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