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Illustration for an ITIN article aimed at web developers based in Slovenia
ITIN15 min read

How web developers from Slovenia Get an ITIN

Web developers in Slovenia need an ITIN for US tax compliance. Learn the process, required documents, and common pitfalls to ensure a smooth application.

Reviewed by , ITIN Specialist at itin.net.

Why Slovenian Web Developers Need an ITIN

Web developers in Slovenia often encounter situations requiring U.S. tax identification, primarily when receiving payments from U.S. clients or platforms. U.S. clients are frequently required by their own tax regulations to report payments made to foreign individuals or entities. This often involves issuing IRS Form 1099-NEC (Nonemployee Compensation) or similar tax forms. Without a U.S. Taxpayer Identification Number, such as an ITIN, U.S. clients may be compelled to withhold tax at the highest rate—currently 30%—from all payments. This substantial withholding can significantly impact your net earnings. Furthermore, some U.S.-based payment processors or marketplaces may also require an ITIN to verify your identity and comply with their own reporting obligations before disbursing funds. For freelance web developers in Slovenia, this presents a direct financial incentive to obtain an ITIN to avoid excessive tax withholding and ensure uninterrupted payment flow from U.S. sources. The ITIN serves as your unique identifier for U.S. tax purposes when you are not eligible for a Social Security Number.

Triggers for Obtaining an ITIN for Web Developers

The primary trigger for a web developer in Slovenia to obtain an ITIN is the need to file a U.S. tax return. This arises when you have U.S.-sourced income that is not subject to full withholding. Common scenarios include direct payments from U.S. clients for freelance web development services, earnings from U.S. online marketplaces (like Upwork or Fiverr, if they facilitate payments directly and require your TIN), or royalties from U.S.-based intellectual property. Another significant trigger is the requirement by a U.S. client or payer to complete IRS Form W-8BEN (Certificate of Foreign Status of Beneficial Owner for U.S. Tax Withholding and Reporting). While this form certifies your foreign status, some payers may request a U.S. TIN on this form to reduce or eliminate withholding, especially if you intend to claim benefits under the U.S.-Slovenia tax treaty. Establishing a U.S. LLC for your business operations also necessitates U.S. tax filings, often requiring an ITIN for individuals associated with the LLC, particularly if you are the sole member or if the LLC is treated as a disregarded entity for U.S. tax purposes. Even if you don't owe U.S. taxes after accounting for treaty provisions or deductions, you might still need to file a return to claim a refund of any tax that was withheld. In such cases, an ITIN is mandatory for filing.

Required Documentation for ITIN Application

To apply for an ITIN, you must submit Form W-7, Application for IRS Individual Taxpayer Identification Number. This form requires your full legal name, foreign address, and other personal details. Crucially, you must include documentation to verify your identity and foreign status. The IRS prefers a valid passport as the primary identification document. If a passport is not available, other original or certified copies of identification documents may be accepted, such as a national identity card or a birth certificate. Along with your identification, you must provide a supporting tax document. For most freelance web developers, this will be a copy of your U.S. federal income tax return (e.g., Form 1040-NR, U.S. Nonresident Alien Income Tax Return) for the year you are claiming a tax treaty benefit or for which the ITIN is needed. If you are applying based on a tax treaty benefit, you must attach the relevant tax return and claim the treaty benefit on that return. Failure to provide a complete and accurate tax return with your Form W-7 is a common reason for application rejection. Ensure all documents are clear, legible, and meet IRS specifications.

The ITIN Application Process for Web Developers

The application process for an ITIN begins with completing Form W-7. You must accurately fill in all required fields, ensuring your name, address, and other personal information match your supporting identification documents precisely. Next, you need to prepare your supporting documentation, which typically includes a copy of your U.S. tax return and your identification document (preferably a passport). Once these are gathered, you have three main options for submission. You can mail your original Form W-7, your tax return, and identification documents directly to the IRS in Austin, Texas. However, this involves sending original documents, which carry a risk of loss, and processing times can be significantly longer, often 10–12 weeks or more. Alternatively, you can apply through a Certified Acceptance Agent (CAA). A CAA, such as itin.net, can verify your original documents and forward your application to the IRS, allowing you to keep your original identification. This method expedites the process, with typical processing times of 5–10 business days for the ITIN assignment after the IRS receives the application. A third option is to apply at a designated IRS Taxpayer Assistance Center (TAC), but these services often require appointments and may not be as readily available or convenient for applicants outside the U.S.

Common Mistakes for Slovenian Web Developers

Web developers in Slovenia applying for an ITIN can fall into specific pitfalls. A frequent error is submitting an incomplete Form W-7, missing crucial information like your foreign tax identification number (if applicable in Slovenia) or incorrect details regarding your U.S. income. Mismatched names between your Form W-7, passport, and any other submitted documents are a leading cause of rejection. Ensure legal names are identical. Another common mistake is failing to attach the required U.S. tax return. Simply stating you have U.S. income is insufficient; you must file the appropriate return. For those claiming benefits under the U.S.-Slovenia tax treaty, incorrect treaty claims on Form 1040-NR are a significant issue. This includes selecting the wrong treaty article or misunderstanding the conditions for reduced withholding. Developers who mail original documents directly to the IRS face the risk of losing them and experience much longer processing times than anticipated. It is also essential to understand that an ITIN is solely for tax reporting purposes and does not authorize you to work in the U.S. or provide eligibility for a Social Security Number.

Benefits of Using a Certified Acceptance Agent (CAA)

Using a Certified Acceptance Agent (CAA) like itin.net offers distinct advantages for web developers in Slovenia applying for an ITIN. The most significant benefit is the verification of your original identification documents. Instead of mailing your passport or other vital documents directly to the IRS, you present them to the CAA. The CAA authenticates these documents and sends certified copies with your Form W-7 application to the IRS. This dramatically reduces the risk of losing your original identification during transit. Furthermore, CAAs are trained to ensure your Form W-7 and supporting documentation are complete and accurate before submission, which helps prevent common rejections. This proactive review minimizes processing delays. While the IRS processing time for an ITIN assignment itself can vary, the CAA service streamlines the initial submission and verification steps, often leading to a faster overall turnaround compared to applying directly. This is particularly valuable for individuals who need their ITIN promptly to meet client or platform requirements. The expertise of a CAA can help ensure your application is correctly filed the first time.

Next Steps After Obtaining Your ITIN

Once you receive your ITIN, usually in the form of an IRS notice (CP-565), you can proceed with your U.S. tax obligations. This includes filing your U.S. tax return for the relevant year and ensuring any required tax payments are made. If you established a U.S. LLC, you will now have the necessary identification to file required informational returns like Form 5472 if applicable, and to open a U.S. bank account. Many U.S. banks require a U.S. TIN (either an SSN or ITIN) to open business accounts. Having an ITIN can also facilitate easier transactions with U.S. clients and payment processors. For web developers in Slovenia, having an ITIN may also enable you to claim tax treaty benefits more effectively on future U.S. income. Consider reviewing your overall U.S. tax strategy, especially concerning your LLC, to ensure ongoing compliance. If you need assistance with your ITIN application or subsequent tax filings, exploring services like itin.net or consulting with a U.S. tax professional specializing in non-resident taxation is a prudent next step. You can review our pricing information or contact us for personalized guidance.

Practical tips

  • Use the same legal name across Form W-7, your passport, and any prior IRS correspondence; mismatched name fields are a common rejection reason.
  • Ensure your submitted U.S. tax return (e.g., Form 1040-NR) is complete and accurate, and correctly claims any applicable U.S.-Slovenia tax treaty benefits.
  • If you are mailing original documents to the IRS, consider using a trackable and insured shipping service to mitigate the risk of loss.
  • Understand that an ITIN is for tax filing purposes only and does not grant work authorization in the U.S.
  • If you are applying based on a tax treaty, ensure you understand the specific requirements and limitations of the treaty article you are claiming.

Frequently asked questions

Do I need an ITIN if my U.S. client pays me through a European intermediary?

If the European intermediary handles all U.S. tax reporting and withholding on your behalf, and you have no direct income or filing requirement with the IRS, you may not need an ITIN. However, if the intermediary issues you a U.S. Form 1099 or requires your U.S. TIN, you will likely need an ITIN. Always verify the reporting requirements with the intermediary.

Can I use my Slovenian tax identification number instead of an ITIN?

No, your Slovenian tax identification number is for tax purposes in Slovenia only. The U.S. Internal Revenue Service (IRS) requires a U.S. Taxpayer Identification Number for individuals who need to file U.S. taxes but do not qualify for a Social Security Number. An ITIN is that specific number for non-residents.

How long does it take to get an ITIN through a Certified Acceptance Agent?

When applying through a Certified Acceptance Agent (CAA), the IRS typically assigns an ITIN within 5–10 business days after the application is received and processed by the IRS. The time it takes to mail your application to the CAA and for them to forward it to the IRS adds to this timeline.

What is the difference between an ITIN and an EIN?

An ITIN (Individual Taxpayer Identification Number) is for individuals who have U.S. tax reporting requirements but cannot get an SSN. An EIN (Employer Identification Number) is for businesses, corporations, partnerships, and other business entities, used for tax reporting related to the business itself. If you form a U.S. LLC, it will likely need an EIN, not an ITIN.

Can I apply for an ITIN if I don't have a U.S. visa?

Yes, you can apply for an ITIN without a U.S. visa. The primary requirement is that you have a U.S. tax filing obligation or are claiming a tax treaty benefit. Your passport or other accepted identification document, along with a U.S. tax return, are the key requirements, not necessarily a U.S. visa.

What happens if I don't get an ITIN and my U.S. client insists?

If your U.S. client insists on a U.S. TIN, you may face significant backup withholding (currently 30%) on payments. This can substantially reduce your earnings. Many clients require a U.S. TIN to avoid their own compliance issues with the IRS. Obtaining an ITIN is often necessary to continue working with such clients without penalty.

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