Skip to main content
itin.net
Illustration for an EIN article aimed at Substack writers based in Spain
EIN10 min read

How Substack writers from Spain Get an EIN

Substack writers in Spain need an EIN for U.S. tax compliance. Understand the requirements, application process, and common pitfalls for non-residents.

Reviewed by , ITIN Specialist at itin.net.

Substack Writers in Spain Face Unique EIN Hurdles

Substack writers based in Spain often encounter a specific challenge when it comes to obtaining an Employer Identification Number (EIN). Unlike U.S. residents who can apply online, non-residents without a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN) face a more complex process. This is primarily due to IRS requirements for verifying the identity of the 'responsible party' for the EIN. For Spanish residents earning income through platforms like Substack, which often facilitate U.S. dollar payouts via services like Stripe, establishing a U.S. business presence or fulfilling specific tax obligations can necessitate an EIN. The platform's U.S. nexus and the need for clear tax reporting for both U.S. authorities and Spanish tax obligations create a situation where an EIN becomes essential for seamless operations and compliance.

When Substack Writers in Spain Need an EIN

An EIN is required for Substack writers in Spain if they are operating as a U.S. business entity, such as a U.S. LLC, or if they need to open a U.S. bank account for their Substack earnings. While a sole proprietor in Spain might not inherently need a U.S. EIN for their Spanish business, Stripe, the payment processor often used by Substack, may require it for tax reporting purposes, especially if the writer is treated as a U.S. business for tax purposes or needs to comply with U.S. information reporting requirements like Form 5472. This form is crucial for foreign-owned U.S. entities and carries significant penalties for non-compliance. Furthermore, if a writer plans to hire employees in the U.S. or establish a U.S. business presence beyond just receiving payments, an EIN becomes mandatory. The decision to form a U.S. LLC for liability protection or to simplify U.S. tax filings can also trigger the need for an EIN. Confirming the specific requirements with your tax advisor is advisable, especially concerning U.S. information reporting obligations.

Required Documents for Spanish Applicants

To apply for an EIN, non-residents, including Substack writers from Spain, will need specific documentation. The primary document required is the Form SS-4, Application for Employer Identification Number. This form collects detailed information about the business and the responsible party. For the responsible party, a valid government-issued identification document is necessary. Typically, this would be a passport. If the business is a U.S. LLC or another U.S. entity, formation documents will also be required. These might include articles of organization for an LLC or incorporation documents for a corporation. Even if you do not have a physical U.S. business address, a mailing address where you can receive correspondence is needed; this can often be a mail forwarding service. It is critical that all information provided on the Form SS-4 aligns with your identification documents and business formation papers.

The EIN Application Process for Non-Residents

Applying for an EIN as a non-resident from Spain involves a different process than for U.S. residents. Since you likely do not have an SSN or ITIN, you cannot use the IRS's online application portal. The primary method for non-residents is to submit Form SS-4 via fax or mail directly to the IRS. This process typically takes between 3 to 5 weeks for the IRS to process. Once the IRS has processed your application, they will mail the EIN confirmation letter, known as CP-575, to the address provided on your Form SS-4. This can add further delay to receiving your official EIN. It is important to complete the Form SS-4 accurately, paying close attention to section 7b, where you must write 'Foreign' if you do not have an SSN or ITIN. Incorrectly filling out this section can lead to delays or rejection of your application.

Common Mistakes for Substack Writers in Spain

Substack writers in Spain often make specific errors when applying for an EIN. A frequent mistake is attempting to use the online application portal, which requires an SSN or ITIN and will fail for non-residents. Another common pitfall is incorrectly filling out line 7b of Form SS-4. If you do not have an SSN or ITIN, you must write 'Foreign' in this field. Leaving it blank or entering incorrect information can cause processing delays or application rejection. Some writers also mistakenly believe they don't need an EIN when platforms like Stripe require it for tax information reporting, particularly under rules for foreign-owned U.S. entities, which necessitates filing Form 5472. Misunderstanding these reporting obligations can lead to significant penalties. Lastly, ensure your business name and responsible party's name are consistent across all documents, including your passport and any U.S. business formation documents.

The Certified Acceptance Agent (CAA) Advantage

For non-residents, especially those in Spain, applying for an EIN can be significantly streamlined by using a Certified Acceptance Agent (CAA). A CAA, like itin.net, acts as an intermediary between you and the IRS. The primary benefit of using a CAA is that they can verify your identity and review your Form SS-4 application before it's submitted to the IRS. This verification process is similar to what the IRS would do, but it's handled by the trusted agent. This can expedite the process, as the IRS has already vetted your application and your identity. For non-residents, this is particularly valuable because it can bypass the longer processing times associated with mail or fax applications. Some CAA services may even offer expedited channels, potentially reducing the timeline from weeks to just a few business days. This path is often preferred by international clients needing their EINs quickly.

Next Steps After Obtaining Your EIN

Once you have secured your EIN, you can proceed with opening a U.S. bank account, which is often a primary reason for needing the EIN in the first place. Services like Stripe may also require this EIN for their tax documentation. If you formed a U.S. LLC, you will need to ensure compliance with ongoing filing requirements, such as Form 5472, if applicable. For Substack writers, this means accurately reporting income and expenses related to your U.S. business activities. Reviewing the pricing for EIN services, particularly for non-residents, is a practical next step. If you require assistance with the application process or have specific questions about your situation as a writer in Spain, consider reaching out to a specialist service. You can explore pricing details on our EIN application service page or contact us for personalized guidance.

Practical tips

  • Use 'Foreign' in line 7b of Form SS-4 if you do not have an SSN or ITIN; do not leave it blank.
  • Ensure your passport name exactly matches the responsible party's name on Form SS-4 and any U.S. business formation documents.
  • If using a mail forwarding service for your U.S. business address, confirm they accept IRS correspondence.
  • Factor in potential delays for mail delivery of the EIN confirmation letter (CP-575) to Spain.
  • Understand that if you operate as a U.S. LLC, you are likely subject to U.S. information reporting requirements like Form 5472, even if you are not a U.S. tax resident.

Frequently asked questions

Can I apply for an EIN online from Spain?

No, as a non-resident of the U.S. without an SSN or ITIN, you cannot use the IRS online portal to apply for an EIN. You must apply via fax or mail, or through a Certified Acceptance Agent (CAA).

How long does it take to get an EIN from Spain?

Applying directly to the IRS via fax or mail can take 3-5 weeks. Using a Certified Acceptance Agent (CAA) can significantly expedite this process, potentially reducing the timeline to a few business days.

What is the 'responsible party' for a Substack writer in Spain?

The responsible party is generally the individual who controls, manages, or directs the applicant entity and its business activities. For a sole proprietor or a single-member LLC owned by a Spanish resident, this is typically the writer themselves.

Do I need a U.S. business address to get an EIN?

While you don't need a physical U.S. office, you do need a mailing address where the IRS can send correspondence. This can often be a mail forwarding service. The address should be the primary business address.

What if my Substack income is low? Do I still need an EIN?

An EIN is often required by payment processors like Stripe for tax reporting purposes, regardless of income level, especially if you are operating through a U.S. entity like a U.S. LLC. It's also necessary for opening a U.S. bank account. Confirm the specific requirements of your payment processor and bank.

Will getting an EIN affect my taxes in Spain?

An EIN is a U.S. tax ID. While it doesn't directly change your Spanish tax obligations, it is essential for U.S. tax compliance. You may need to report U.S.-sourced income on your Spanish tax return. It's advisable to consult with a Spanish tax advisor regarding any treaty implications or reporting requirements.

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