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ITIN guide for remote employees of US companies based in Denmark
ITIN18 min read

ITIN for remote employees of US companies from Denmark

Remote employees in Denmark working for U.S. companies need an ITIN to file U.S. taxes. Understand the process, required documents, and common pitfalls for a smooth application.

Reviewed by , ITIN Specialist at itin.net.

ITIN for Remote Employees in Denmark: The Core Issue

Remote employees in Denmark working for U.S. companies often encounter a specific administrative hurdle: the need for an ITIN to comply with U.S. tax reporting obligations. Unlike U.S. citizens or residents eligible for a Social Security Number (SSN), foreign nationals in your situation require an Individual Taxpayer Identification Number (ITIN) to file U.S. taxes. This number is essential when U.S. source income is earned, and tax treaties or specific filing requirements mandate reporting to the IRS. The core friction point is the necessity of obtaining this U.S. tax ID from abroad, navigating IRS procedures, and ensuring all documentation meets their stringent requirements, especially when physically distant from the U.S. The Denmark–U.S. tax treaty may offer benefits, but it does not eliminate the need for a U.S. tax identification number if U.S. source income is present.

The primary trigger for needing an ITIN is typically the receipt of U.S. source income that is subject to U.S. tax withholding, or a requirement to file a U.S. tax return. For remote employees, this often arises when paid directly by a U.S. employer without a U.S. payroll intermediary that would handle withholding and reporting. In such cases, the U.S. company may issue a Form 1099 instead of a W-2, or require the employee to self-certify their non-resident alien status using Form W-8BEN. Even if a treaty benefit reduces or eliminates U.S. tax, the IRS still requires a U.S. tax identification number for reporting purposes. Therefore, while the Denmark–U.S. tax treaty can mitigate the actual tax liability, it doesn't remove the procedural step of obtaining an ITIN if required for filing. Failure to obtain an ITIN when necessary can lead to incorrect tax withholding, penalties, and issues with future U.S. tax filings.

When an ITIN Becomes Necessary for Remote Employees in Denmark

An ITIN is required for remote employees in Denmark working for U.S. companies primarily when they are considered U.S. source income earners and are not eligible for an SSN. This situation frequently arises when a U.S. company hires foreign nationals as independent contractors, paying them via Form 1099-NEC or 1099-MISC. In these contractor scenarios, the individual is responsible for their own U.S. tax filings, necessitating an ITIN. Even if employed directly by the U.S. company as a statutory employee, if the company does not have a U.S. payroll system capable of handling foreign national employees, they may still require the employee to obtain an ITIN for reporting purposes.

The IRS requires an ITIN for anyone who must file a U.S. tax return but cannot obtain an SSN. This includes non-resident aliens receiving certain types of U.S. income, such as self-employment income, interest, dividends, or royalties from U.S. sources, even if the income is effectively connected with a U.S. trade or business. For remote employees in Denmark, this could also include income from services performed while physically present in the U.S. for a temporary period, even if their primary residence and employer are abroad. Furthermore, if the U.S. company has specific reporting requirements, such as certain treaty benefit claims or if the income requires specific IRS forms to be filed, an ITIN will be mandatory. The use of a Form W-8BEN by the employee signals to the payer that they are a foreign person, and depending on the nature of the income and the payer's obligations, this may necessitate the employee's ITIN for accurate reporting on forms like 1042-S.

Required Documentation for Your ITIN Application

To apply for an ITIN, you must submit Form W-7, Application for IRS Individual Taxpayer Identification Number, along with original or certified copies of supporting identification documents. The IRS requires proof of foreign status and identity. The most commonly accepted and preferred document for this purpose is your valid passport. It serves as both proof of identity and foreign status, simplifying the submission process as it satisfies both requirements with a single document.

If you do not have a valid passport, or if your passport does not contain sufficient information to meet the IRS requirements, you may use a combination of other original or certified documents. These can include a national identity card (showing name, photograph, address, date of birth, and expiration date), a birth certificate (for dependents under 18), a U.S. visa, or a driver's license. Each document must be valid and unexpired. Crucially, all submitted documents must be originals or certified copies from the issuing agency. The IRS will not accept photocopies unless they are certified by the issuing agency. If you are applying based on a foreign tax return, ensure it is complete and accurate, as this is also a key supporting document. The correct completion of Form W-7 is paramount; any errors or omissions can lead to delays or rejection of your application.

Step-by-Step ITIN Application Process

The ITIN application process begins with accurately completing Form W-7. This form requires personal information, including your name, foreign address, U.S. address (if any), and the reason for applying for an ITIN. It is vital to fill out every section completely and truthfully. Missing information or errors on the W-7 are primary reasons for application rejection.

Once Form W-7 is complete, you must gather your original or certified identification documents. As mentioned, a valid passport is the preferred document. If you are not using a passport, ensure you have the correct combination of other acceptable documents. After assembling Form W-7 and your identification documents, you have three primary options for submission. You can mail the application and original documents directly to the IRS in Austin, Texas. However, this method involves sending your original identification documents through the mail, which carries inherent risks, and processing times can be significantly longer, often several months. A more efficient and secure alternative is to apply through an IRS-authorized Certified Acceptance Agent (CAA). Companies like itin.net are CAAs and can verify your original documents, sending only certified copies to the IRS. This eliminates the risk of losing your original passport or other vital identification. The CAA process typically takes 5–10 business days for the IRS to process your ITIN application once it's submitted by the agent. The IRS will then issue your ITIN, which will be mailed to you on a CP-565 notice. This notice confirms your ITIN assignment.

Common Mistakes for Remote Employees in Denmark

Remote employees in Denmark often make specific mistakes when applying for an ITIN, largely due to the complexities of international employment and U.S. tax law. A frequent error is submitting photocopies of identification documents instead of originals or certified copies. The IRS strictly requires original documents or certified copies from the issuing agency. Sending photocopies will lead to an automatic rejection of your Form W-7 application, delaying your ITIN acquisition.

Another common pitfall is failing to include a valid U.S. federal tax return with your Form W-7 application, unless you qualify for an exception. For most remote employees of U.S. companies, especially those paid as independent contractors, the tax return is a mandatory component. This could be the tax return for the year you are claiming treaty benefits, or a return showing income that requires an ITIN. If you are unsure whether your specific situation requires a tax return, consult with a tax professional. Additionally, incorrect claims regarding tax treaty benefits can cause significant issues. Ensure you are correctly referencing the relevant article of the Denmark–U.S. tax treaty and that your income type qualifies for the specific withholding rate or exemption you are claiming. Mismatched names between your identification documents and Form W-7 are also a frequent cause of rejection. Ensure the legal name on your application precisely matches the name on your passport or other primary identification.

The Certified Acceptance Agent (CAA) Advantage

Applying for an ITIN through a Certified Acceptance Agent (CAA) like itin.net offers distinct advantages, particularly for individuals residing outside the U.S. The primary benefit is the secure verification of your identity and foreign status documents. Instead of mailing your original, irreplaceable documents directly to the IRS, you present them to a CAA. The CAA will review your documents, verify their authenticity, and then send certified copies to the IRS on your behalf. This process eliminates the significant risk of losing your passport or other vital identification during transit to and from the IRS.

Furthermore, CAAs are trained to assist applicants in correctly completing Form W-7 and ensuring all supporting documentation is in order. This reduces the likelihood of application errors, which are a leading cause of delays and rejections. The IRS provides a typical processing timeline of 5–10 business days for applications submitted by a CAA. This is substantially faster than the processing times for applications mailed directly to the IRS, which can often take several months, especially during peak tax seasons. By using a CAA, you expedite the process and gain peace of mind knowing your sensitive documents are handled by a trusted, IRS-authorized intermediary. The service provided by itin.net includes this document verification and submission process, streamlining the ITIN application for remote employees.

Next Steps After Obtaining Your ITIN

Once you receive your ITIN from the IRS, typically on a CP-565 notice, your primary U.S. tax filing obligation for the relevant period is addressed. This number is crucial for any future U.S. tax filings, including tax returns and potentially other IRS forms. For remote employees in Denmark, this means you can now accurately report your U.S. source income and claim any applicable treaty benefits without fear of penalties for incorrect identification.

Your ITIN is also often required for opening a U.S. bank account, although some banks may have specific requirements. If you are paid by a U.S. company, ensure they have your correct ITIN on file for accurate tax reporting. If you are operating as an independent contractor, you may need to revisit your W-8BEN status with your U.S. clients. For those setting up a U.S. business structure, such as a U.S. LLC, an ITIN is often a prerequisite for certain filings or for the beneficial owners. If you need assistance with your ITIN application or subsequent tax filings, consider reviewing the itin.net Standard Package pricing or contacting us for personalized guidance. The process of obtaining an ITIN is a critical step for remote employees earning U.S. income, ensuring compliance and avoiding future tax complications.

Practical tips

  • Use the exact same legal name on your Form W-7 as it appears on your passport or other primary identification document.
  • Ensure your foreign address is complete and accurate, including postal codes, as this is where the IRS will mail your ITIN confirmation.
  • If you are claiming a tax treaty benefit, carefully review the Denmark-U.S. tax treaty and ensure your income type qualifies for the specific article you are referencing.
  • Keep copies of your submitted Form W-7 and all supporting documents for your own records. The IRS may request them again.
  • Understand that an ITIN is for tax purposes only; it does not grant you the right to work in the U.S. or provide any immigration benefits.

Frequently asked questions

Can I apply for an ITIN while still in Denmark?

Yes, you can apply for an ITIN while residing in Denmark. The IRS allows non-residents to apply by mail or through a Certified Acceptance Agent (CAA). Using a CAA, like itin.net, is highly recommended as it avoids the need to mail your original identification documents.

Do I need a U.S. tax return to apply for an ITIN?

For most remote employees of U.S. companies who are applying for an ITIN for the first time, a U.S. tax return is typically required. This often means filing a return for the current or preceding tax year. However, there are exceptions, such as if you are applying solely to comply with IRS withholding requirements or for certain treaty benefits without filing a return. Review the Form W-7 instructions or consult a tax professional for your specific situation.

How long does it take to get an ITIN as a remote employee in Denmark?

When applying through a Certified Acceptance Agent (CAA) like itin.net, the IRS generally processes ITIN applications within 5–10 business days after the agent submits them. If you mail your application directly to the IRS, processing times can be much longer, often several months.

What if my name on my passport is different from my Form W-7?

Mismatched names are a common reason for ITIN application rejection. Ensure the name on your Form W-7 exactly matches the legal name on your primary identification document, such as your passport. If there are discrepancies, you may need to provide additional documentation to explain the difference or update your identification.

Can I use my ITIN to open a U.S. bank account?

Yes, an ITIN can often be used to open a U.S. bank account. Many U.S. banks and financial institutions accept an ITIN as a valid form of identification for non-residents. However, requirements can vary by institution, so it is advisable to check with the specific bank you intend to use. Some popular options for non-residents include Mercury, Relay, and Brex.

What is the difference between an ITIN and an EIN?

An ITIN (Individual Taxpayer Identification Number) is for individuals who need to file U.S. taxes but cannot get an SSN. An EIN (Employer Identification Number) is a tax ID for businesses, not individuals. If you are operating as a sole proprietor and receiving U.S. income, you'll likely need an ITIN. If you are forming a U.S. business entity like a U.S. LLC and plan to hire employees or require a business tax ID, you would apply for an EIN using Form SS-4.

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