Skip to main content
itin.net
Illustration for an ITIN article aimed at Upwork freelancers based in Denmark
ITIN15 min read

How Upwork freelancers from Denmark Get an ITIN

Denmark-based Upwork freelancers earning U.S. income need an ITIN for tax compliance. Learn the application process, required documents, and common pitfalls.

Reviewed by , ITIN Specialist at itin.net.

Upwork Freelancers in Denmark Face Unique ITIN Requirements

Upwork freelancers based in Denmark often encounter the need for an ITIN when their U.S. clients require specific tax documentation. Unlike U.S. residents who use a Social Security Number (SSN), individuals without U.S. residency or an SSN who earn U.S. source income must obtain an ITIN. For Danish freelancers, this typically arises when U.S. clients request a completed W-8BEN form to certify foreign status and potentially benefit from tax treaty provisions, or when they need to file a U.S. tax return themselves. The process involves applying to the IRS for this unique nine-digit tax processing number. Understanding the nuances of U.S. tax obligations as a non-resident freelancer is key to avoiding compliance issues and ensuring accurate tax reporting. The ITIN serves as the primary identifier for these tax filings and related communications with the Internal Revenue Service (IRS).

When You Need an ITIN as a Denmark-Based Upwork Freelancer

An ITIN is required if you are a non-resident alien, like most Upwork freelancers based in Denmark, and have U.S. tax reporting obligations but no SSN. The most common trigger for Upwork freelancers is when U.S. clients require a completed Form W-8BEN. This form is used to certify your foreign status and claim any applicable treaty benefits, which can reduce the U.S. tax withholding rate on payments. Without a valid W-8BEN, U.S. clients may be required to withhold tax at the highest applicable rate, often 30%. Additionally, if your freelance activities create a U.S. tax liability, you will need an ITIN to file a U.S. tax return, such as Form 1040-NR (U.S. Nonresident Alien Income Tax Return). Some U.S. clients may also request an Employer Identification Number (EIN) for their own record-keeping, which can sometimes necessitate an ITIN for the foreign individual if they are operating as a sole proprietor or partnership. The IRS uses the ITIN to track tax filings for individuals who fall into this category.

Required Documents 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 identification documents. The most commonly accepted identification document is a valid passport, as it proves both identity and nationality. If you do not have a passport, other acceptable documents include a national identity card, a U.S. visa, or a driver's license. You will also need to include documentation that substantiates your reason for needing an ITIN. For Upwork freelancers, this usually means providing a U.S. federal tax return (e.g., Form 1040-NR) that you are filing, or a letter from the IRS indicating the need for an ITIN. Ensure all submitted documents are either originals or certified copies from the issuing agency. The IRS will not accept photocopies unless they are certified by the agency that issued them. The completed Form W-7 must accurately reflect the information on your supporting documents.

The ITIN Application Process for Danish Freelancers

The ITIN application process involves several key steps. First, you must complete and sign Form W-7, Application for IRS Individual Taxpayer Identification Number. Ensure all information is accurate and matches your identification documents. Second, gather your required supporting documents, including a U.S. federal tax return and original or certified copies of identification, such as your passport. Third, choose your submission method. You can mail your application and original documents directly to the IRS, which carries the risk of losing original documents. Alternatively, you can apply through a Certified Acceptance Agent (CAA), like itin.net. The CAA will verify your original documents and forward your application to the IRS. This method is generally preferred as it avoids mailing sensitive originals. Once submitted, the IRS typically processes ITIN applications within 5–10 business days when filed via a CAA. Applications sent directly to the IRS may take longer. You will receive an ITIN assignment letter (IRS document CP-565) once approved.

Common Mistakes for Upwork Freelancers from Denmark

Upwork freelancers based in Denmark often make specific errors when applying for an ITIN. A frequent mistake is submitting incomplete or inaccurate Form W-7 applications. This includes missing signatures, incorrect personal information, or failing to provide a valid U.S. tax return or the required justification for needing an ITIN. Another pitfall is not providing correct identification documents; the IRS requires original or certified copies, and mailing originals directly can lead to their loss. Mismatched names between your identification and the W-7 form are also common reasons for rejection. For those claiming treaty benefits, incorrect treaty claims or referencing the wrong treaty article can cause significant issues. Ensure that your claimed residency status in Denmark aligns with the treaty provisions and that your U.S. income source is correctly identified. Failing to understand the specific requirements for non-resident alien income reporting can lead to errors on your tax return, which is a prerequisite for your ITIN application.

Benefits of Using a Certified Acceptance Agent (CAA)

Applying for an ITIN through a Certified Acceptance Agent (CAA) offers significant advantages, especially for Upwork freelancers in Denmark. A CAA, such as itin.net, is authorized by the IRS to help individuals complete Form W-7 and to authenticate your original identification documents. This means you do not have to mail your original passport or other vital documents directly to the IRS, mitigating the risk of loss or theft. The CAA reviews your application for completeness and accuracy before submitting it, which helps to prevent common errors that can delay processing or lead to rejection. The typical processing timeline for applications submitted through a CAA is faster, often within 5–10 business days, compared to mail-in applications that can take considerably longer. By using a CAA, you gain peace of mind knowing your documents are handled by a trusted intermediary and your application is more likely to be processed smoothly. This service streamlines the process and provides expert guidance.

Next Steps After Obtaining Your ITIN

Once you receive your ITIN assignment letter (CP-565) from the IRS, you can use it for all future U.S. tax filings. If you applied for an ITIN to file a tax return, ensure that return is submitted promptly. For Upwork freelancers, the ITIN is crucial for accurately reporting U.S. income and potentially claiming benefits under the Denmark-U.S. tax treaty. You may need to update your W-8BEN form with your U.S. clients to include your new ITIN. If you plan to establish a U.S. business presence, such as a U.S. LLC, an ITIN might be a preliminary step before obtaining an EIN. Consider opening a U.S. bank account to manage your U.S. client payments more efficiently. For those who require assistance with the ITIN application process or have complex tax situations, consulting with a specialist is advisable. You can review the itin.net Standard Package pricing at $497 or contact us for personalized guidance.

Practical tips

  • Ensure the legal name on your Form W-7 precisely matches your passport or other primary identification document; any discrepancies can lead to application rejection.
  • When claiming tax treaty benefits, confirm the specific article of the Denmark-U.S. tax treaty that applies to your freelance income and accurately report it on your tax return and Form W-7.
  • If your U.S. client requires you to fill out a Form W-8BEN, include your ITIN once you receive it to certify your foreign status and potentially reduce U.S. tax withholding.
  • Keep detailed records of all income earned from U.S. clients and any expenses incurred related to your freelance work, as these will be necessary for filing your U.S. tax return.
  • Understand that an ITIN is for tax purposes only and does not grant any work authorization in the U.S. or eligibility for Social Security benefits.

Frequently asked questions

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

No, your Danish tax identification number is not a substitute for an ITIN. The IRS requires an ITIN for individuals who need to file U.S. taxes but do not have an SSN. Your Danish tax ID is for tax purposes in Denmark only.

How long does it take to get an ITIN after applying from Denmark?

When applying through a Certified Acceptance Agent (CAA) like itin.net, the process typically takes 5–10 business days. If you mail your application directly to the IRS, it can take significantly longer, potentially several weeks or months.

Do I need to be physically in the U.S. to apply for an ITIN?

No, you do not need to be in the U.S. to apply for an ITIN. Upwork freelancers based in Denmark can apply from their home country using the mail-in process or by working with a Certified Acceptance Agent (CAA) who can handle the application remotely or in person.

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

If your U.S. client requires documentation for tax purposes (like a W-8BEN) and you don't provide it, they may be forced to withhold U.S. taxes at the highest statutory rate (typically 30%) from your payments. This can significantly reduce your earnings.

Is the Denmark-U.S. tax treaty relevant to my ITIN application?

Yes, the Denmark-U.S. tax treaty is highly relevant. It often allows for reduced withholding rates on certain types of income. You will need to reference the appropriate treaty article on your Form W-7 and U.S. tax return if you are claiming treaty benefits.

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

While an ITIN is primarily for tax purposes, some U.S. banks may accept it as a form of identification for opening a U.S. bank account, particularly if you are also completing a W-8BEN form. However, bank policies vary, and you should confirm with the specific bank.

Ready to Apply for Your ITIN?

Our IRS-Certified Acceptance Agents make the process simple and remote — from anywhere in the world.

  • IRS Certified
  • 5–10 Business Days
  • Money-Back Guarantee