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Illustration for an ITIN article aimed at indie hackers based in Denmark
ITIN18 min read

How indie hackers from Denmark Get an ITIN

Danish indie hackers earning U.S. income need an ITIN. Learn the specific steps, required documents, and common pitfalls for U.S. tax compliance, even without a Social Security number.

Reviewed by , ITIN Specialist at itin.net.

Danish Indie Hackers Face Unique ITIN Application Hurdles

Indie hackers in Denmark often establish U.S. business structures, such as a U.S. LLC, to facilitate their operations, particularly when using platforms like Stripe Atlas or seeking U.S. bank accounts. This setup, while beneficial for market access and credibility, frequently triggers U.S. tax filing obligations. Unlike U.S. citizens or residents eligible for a Social Security Number (SSN), these founders require an Individual Taxpayer Identification Number (ITIN) to comply with IRS regulations. The primary friction point for Danish indie hackers is the need to obtain this U.S. tax ID without having a pre-existing U.S. nexus beyond their business activities. Navigating U.S. tax forms and procedures from abroad adds a layer of complexity, often requiring careful attention to detail and an understanding of how international tax treaties might apply. The goal is to secure the ITIN efficiently to avoid penalties and maintain compliance, allowing focus to remain on business growth.

For solo founders and bootstrappers operating leanly, the cost and time associated with obtaining an ITIN are significant considerations. Understanding the process thoroughly can prevent costly errors and delays. This guide focuses on the specific scenarios and documentation relevant to indie hackers in Denmark, addressing the common questions and challenges they encounter when applying for an ITIN. The process is manageable with the right information, ensuring that U.S. tax compliance does not become an insurmountable barrier to international business ventures. itin.net specializes in assisting non-residents with this process, aiming for a smooth application experience.

When You Need an ITIN as a Danish Indie Hacker

An ITIN becomes necessary for Danish indie hackers primarily when they have U.S. tax reporting or filing requirements that cannot be met with an SSN. A common trigger is earning U.S. source income that is subject to U.S. taxation. This can arise from various sources, including payments processed through U.S.-based payment platforms or revenue from U.S. clients. Even if you operate your business through a U.S. LLC and have obtained an Employer Identification Number (EIN) or filed Form SS-4, you may still need an ITIN if you, as an individual, have a U.S. tax liability. This is especially true if you are a foreign owner of a U.S. LLC that is treated as a disregarded entity for U.S. tax purposes, which requires filing Form 5472 to report transactions between the owner and the entity.

Furthermore, any individual who is required to file a U.S. tax return but is not eligible for an SSN must obtain an ITIN. This includes non-resident aliens who have U.S. income, such as royalties, service fees, or business income effectively connected with a U.S. trade or business. The IRS uses the ITIN for tax processing and identification purposes, ensuring that all individuals with U.S. tax obligations are accounted for. The Denmark-U.S. tax treaty may offer benefits, such as reduced withholding rates on certain types of income, but claiming these benefits typically requires filing a U.S. tax return and thus having an ITIN. Therefore, establishing a U.S. business presence or earning U.S. income are the key indicators that an ITIN application is likely required.

Essential Documents for Your ITIN Application

Applying for an ITIN requires submitting specific documentation to the IRS to verify your identity and foreign status. The primary form you will complete is Form W-7, Application for IRS Individual Taxpayer Identification Number. This form collects your personal information, including your name, address, and reason for applying for an ITIN. You must submit this form along with original or certified copies of supporting identification documents.

The most commonly accepted and preferred identification document is a valid passport. If you are submitting your passport, it serves as proof of both identity and nationality. If a passport is not available, other documents can be used, but they must be presented in combination to fulfill the requirements. These can include a national identity card, a driver's license, a birth certificate, a foreign voter's registration card, or a U.S. visa. Each document must contain sufficient information to establish your identity and, where applicable, nationality. For indie hackers in Denmark, a Danish passport is usually the most straightforward option.

In addition to your identification, you will need to provide proof of your need for an ITIN. This typically means attaching a U.S. federal tax return or a statement explaining why you are exempt from filing a tax return but still require an ITIN. If you are applying under a specific treaty benefit, you may need to include relevant documentation that supports your claim. The IRS will review all submitted documents to ensure they meet the requirements before issuing your ITIN. The submission of a completed Form W-7 along with the correct identification and tax documentation is critical for a successful application.

Step-by-Step ITIN Application Process

The ITIN application process involves several key steps, designed to ensure accurate identification and tax compliance. First, you must accurately complete Form W-7. This form requires detailed personal information and the reason for your ITIN application. Ensure all fields are filled out correctly to avoid delays or rejections. Pay close attention to your legal name as it appears on your identification documents, as discrepancies are a common reason for application failure.

Next, gather your supporting documentation. This includes your original or certified identification documents, most importantly a valid passport. You will also need to include the U.S. federal tax return you are filing, or a statement explaining your filing requirement. If you are applying through a Certified Acceptance Agent (CAA), they can review your documents and submit certified copies to the IRS on your behalf, meaning you do not have to mail your original identification. This is a significant advantage for applicants outside the U.S.

Once your application package is assembled, you have a few options for submission. You can mail the complete package directly to the IRS ITIN Operation in Austin, Texas. Alternatively, you can apply through a CAA. The CAA route is generally faster and more secure, as they can verify your original documents on the spot and transmit certified copies to the IRS. The IRS typically processes ITIN applications within 5–10 business days when submitted through a CAA. Direct mail applications can take longer, potentially several weeks or even months, especially during peak tax seasons. After processing, the IRS will issue your ITIN via mail, usually in the form of a CP-565 notice.

Common ITIN Pitfalls for Danish Indie Hackers

Danish indie hackers often encounter specific challenges when applying for an ITIN due to their international status and business setup. A frequent mistake is failing to include a complete and accurate U.S. federal tax return with the Form W-7. The IRS requires this to justify the need for an ITIN. For instance, if you are a foreign owner of a U.S. LLC, you might need to file Form 5472 and potentially Form 1120-F or 1040-NR, depending on your specific income and business structure. Missing or incorrect tax forms are a leading cause of ITIN application rejections.

Another common issue is mismatched documentation. Ensure the name and address on your Form W-7 precisely match those on your passport and any other supporting identification. Any discrepancies, even minor ones, can lead to delays or denial. Many applicants also mistakenly believe they can submit photocopies of their identification documents instead of originals or certified copies. The IRS requires original identification or certified copies obtained from the issuing agency or a CAA. This is where using a service like itin.net, which operates as a CAA, becomes invaluable, as they can verify your original documents without you having to mail them.

Finally, understanding U.S. tax residency and treaty benefits can be complex. Incorrectly claiming treaty benefits or failing to properly report U.S. source income can lead to issues beyond the ITIN application itself. It is crucial to ensure that your tax filings are accurate and that you are only claiming benefits to which you are entitled under the Denmark-U.S. tax treaty. Consulting with a tax professional experienced in international taxation is advisable to avoid these specific pitfalls.

The Certified Acceptance Agent (CAA) Advantage

Applying for an ITIN through a Certified Acceptance Agent (CAA) offers significant advantages, especially for applicants outside the United States. As a CAA, itin.net can verify your original identification documents, such as your passport, and transmit certified copies to the IRS. This means you do not have to risk mailing your valuable original documents, which can take weeks or months to be returned, or face the possibility of them being lost or damaged. The CAA acts as an intermediary, ensuring your documentation meets IRS standards before submission.

Using a CAA like itin.net can also expedite the processing time. While the IRS's standard processing time can vary, applications submitted through a CAA are typically processed much faster, often within 5–10 business days. This efficiency is crucial for indie hackers who need their ITIN promptly to file their taxes or to meet requirements for opening U.S. bank accounts or other financial services. The expertise of a CAA also helps minimize errors in your application package, reducing the likelihood of rejections and the need for resubmission.

The fee for using a CAA is separate from the IRS application itself, which is free. However, the convenience, security, and speed offered by a CAA often outweigh the additional cost. For Danish indie hackers, the ability to have identity documents verified locally or remotely by a trusted agent simplifies the process significantly, making the application more accessible and less stressful. This service is particularly beneficial for those who cannot easily travel to a U.S. embassy or consulate for document verification.

Next Steps After Obtaining Your ITIN

Once you receive your ITIN from the IRS, typically via a CP-565 notice, you can proceed with your U.S. tax filing obligations. If you applied for your ITIN concurrently with a tax return, ensure that the return is properly filed with the IRS using your new ITIN. This step is critical for claiming any tax refunds or fulfilling any tax liabilities. For indie hackers in Denmark, this might involve filing Form 1040-NR (U.S. Nonresident Alien Income Tax Return) or Form 5472 if you are the owner of a U.S. LLC.

Your ITIN is a lifetime number unless it expires (which happens after seven consecutive tax years without activity) or is cancelled by the IRS. It is essential to keep your ITIN confidential and secure, just like you would your Social Security number. If you plan to continue earning U.S. income or operating a U.S. business, you will use this ITIN for all future U.S. tax filings. Renewing your ITIN is generally not required unless it expires due to inactivity, but you should monitor IRS notices for any changes to this policy.

For many indie hackers, obtaining an ITIN is a gateway to further integrating their business with the U.S. financial system, such as opening a U.S. bank account or accessing U.S. investment opportunities. If you need assistance with the ITIN application process or have further questions about U.S. tax compliance for non-residents, consider reaching out to itin.net for expert guidance. You can review our Standard Package pricing, which includes ITIN application assistance, or contact us directly for personalized support.

Practical tips

  • Use the same legal name across Form W-7, your passport, and any prior IRS correspondence. Mismatched name fields are the most common rejection reason.
  • Ensure your submitted tax return is complete and accurate. Incomplete or incorrect returns are a primary cause for ITIN application denial.
  • When applying via a Certified Acceptance Agent (CAA), you avoid mailing original identification documents, significantly reducing risk and processing time.
  • Double-check all dates on Form W-7, especially your date of birth and the date of the tax return you are submitting.
  • If your ITIN application is rejected, carefully review the IRS letter explaining the reason for denial before reapplying. Address the specific issue identified.

Frequently asked questions

Can I apply for an ITIN if I am a resident of Denmark and do not have a U.S. Social Security Number?

Yes, if you are a resident of Denmark and are required to file a U.S. tax return but are not eligible for an SSN, you can apply for an ITIN using Form W-7. This is common for indie hackers earning U.S. income or operating a U.S. business.

What is the difference between an ITIN and an EIN for a Danish indie hacker?

An ITIN is a personal tax identification number for individuals filing U.S. taxes without an SSN. An EIN (Employer Identification Number) is a business tax ID for entities, like a U.S. LLC. You may need both: an EIN for your U.S. business and an ITIN for your personal tax filings related to that business.

How long does it take to get an ITIN 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 several weeks or even months.

Do I need to send my original passport to the IRS to get an ITIN?

No, you do not have to mail your original passport. You can use a Certified Acceptance Agent (CAA) who can verify your original identification documents and send certified copies to the IRS, eliminating the need to mail originals.

What U.S. tax forms might a Danish indie hacker need to file with their ITIN application?

Typically, you will file Form W-7 along with a U.S. federal tax return. For owners of U.S. LLCs, this might involve Form 5472 and potentially Form 1040-NR (U.S. Nonresident Alien Income Tax Return) or Form 1120-F (U.S. Income Tax Return of a Foreign Corporation), depending on your specific situation.

Can the Denmark-U.S. tax treaty affect my ITIN application or tax obligations?

The Denmark-U.S. tax treaty can affect your U.S. tax obligations, potentially reducing withholding tax rates on certain types of income. However, to claim treaty benefits, you generally must file a U.S. tax return and have an ITIN. Confirm specific treaty provisions with a qualified tax professional.

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