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EIN guide for Substack writers based in Chile
EIN12 min read

EIN for Substack writers from Chile

Chilean Substack writers often need a U.S. EIN for tax purposes. Learn if you need one, the required documents, the application process, and common pitfalls to avoid.

Reviewed by , ITIN Specialist at itin.net.

Why Substack Writers in Chile Need a U.S. EIN

Substack writers based in Chile face a specific challenge when their earnings reach a certain threshold or when required by their payment processor, typically Stripe. While you operate from Chile, Substack and Stripe process payments through U.S. entities. This often necessitates a U.S. federal tax ID, known as an Employer Identification Number (EIN), to ensure compliant tax reporting. Without an EIN, you may encounter issues with payment holds or be subject to higher backup withholding rates. The IRS requires an EIN for U.S. businesses, and for many non-resident freelancers earning U.S.-sourced income, this becomes a de facto requirement for smooth financial operations. The primary friction point is receiving consistent payouts and fulfilling U.S. tax obligations without a U.S. personal tax ID like an SSN or ITIN. This guide clarifies when and how Chilean Substack writers can obtain an EIN.

When is an EIN Required for Chilean Substack Writers?

An EIN is generally required if you are operating as a U.S. business entity or if a U.S. entity requires you to have one for tax reporting purposes. For Substack writers in Chile, the trigger often comes from Stripe, which may require an EIN for 1099-K reporting if your earnings exceed certain thresholds. Even if you are a sole proprietor operating under your own name, earning significant income through U.S. platforms like Substack can necessitate an EIN for proper tax compliance. This is particularly true if Substack or Stripe requests it to issue tax forms like a 1099-NEC or 1099-K. While not strictly a U.S. business formation requirement for a non-resident, it becomes a practical necessity for payment processing and tax reporting to the IRS. Failure to obtain one when required can lead to payment disruptions or increased tax liabilities.

Required Documents for EIN Application

Applying for an EIN as a non-resident requires specific documentation. The primary document is the IRS Form SS-4, Application for Employer Identification Number. You will need to complete this form accurately, providing details about your business or freelance activity. Crucially, since you are a non-resident without a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN), you must correctly handle line 7b of the SS-4. Instead of an SSN, you will write 'Foreign' in this field. Other supporting documents typically include a copy of the responsible party's passport. If you are forming a U.S. entity like a U.S. LLC, you would also need to provide formation documents such as your Articles of Organization and Operating Agreement. While a U.S. business address is often requested, for non-residents, a mail forwarding service or the address of a trusted third party can sometimes be used, though the IRS prefers a physical U.S. address. Ensure all document details match precisely to avoid application delays.

The EIN Application Process for Non-Residents

The process for obtaining an EIN as a non-resident differs significantly from that for U.S. residents. U.S. residents can typically apply online and receive an EIN within 1–2 business days. However, non-residents who do not have an SSN or ITIN cannot use the online portal. The primary method for non-residents is to apply via fax or mail using Form SS-4. After submitting the form by fax, the IRS generally processes it within 3–5 weeks. You will receive your EIN confirmation letter, known as a CP-575, via fax or mail. It is essential to fill out Form SS-4 completely and accurately. Any missing information or errors can lead to significant delays or outright rejection of your application. The IRS will contact you if they require further clarification, but this can extend the processing time considerably. Patience is key when applying via fax or mail.

Common Mistakes for Chilean Substack Writers

Chilean Substack writers 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; writing 'Foreign' is essential when no SSN or ITIN is available. Some applicants misunderstand the 'responsible party' requirement, especially if they are operating as a sole proprietor. Ensure the responsible party is the individual who controls, manages, or directs the entity or business, typically the writer themselves. Lastly, providing incomplete or inaccurate contact information can lead to communication issues with the IRS, delaying the process. Double-checking all details against your passport and any other official documents is vital.

The Certified Acceptance Agent (CAA) Path

An alternative to the direct fax or mail application for non-residents is to use a Certified Acceptance Agent (CAA). As a CAA, itin.net can act as an intermediary between you and the IRS. This channel offers a significantly faster processing time, often reducing the wait to 3–5 business days, compared to the weeks required for fax applications. A CAA has been vetted by the IRS and is authorized to assist applicants in completing Form SS-4 and to forward the application to the IRS on their behalf. They can also authenticate your identification documents, such as your passport, which can streamline the process. Using a CAA service like itin.net's can save you time and reduce the likelihood of application errors, providing a more predictable and efficient path to obtaining your EIN. This service is particularly valuable for those needing their EIN quickly.

Next Steps After Obtaining Your EIN

Once you receive your EIN confirmation (CP-575), you can proceed with opening a U.S. bank account. Many banks, including online options like Relay, Mercury, and Brex, require an EIN and U.S. business formation documents (if applicable) to open an account for non-residents. This U.S. bank account is crucial for managing your Substack earnings separately and for simplifying U.S. tax filings. You may also need to file additional IRS forms, such as Form 5472, Information Return of a 25% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business, if you have formed a U.S. LLC or corporation. Review your specific tax obligations with a qualified tax professional. For personalized assistance with your EIN application or U.S. business setup, consider exploring the services offered by itin.net or contacting us directly.

Practical tips

  • Use the exact legal name of the responsible party as it appears on their passport for all sections of Form SS-4.
  • If you have previously applied for an ITIN or filed U.S. taxes, and have an ITIN, you may be eligible to apply for an EIN online, but confirm this with a tax professional.
  • When filling out Form SS-4, ensure the 'responsible party' is clearly identified as the individual controlling the business operations, not a company or entity.
  • Keep a copy of your submitted Form SS-4 and your EIN confirmation letter (CP-575) in a safe place for future reference and tax filings.
  • If you are forming a U.S. LLC, ensure your formation documents are complete and filed with the relevant U.S. state before applying for your EIN.

Frequently asked questions

Can I use my Chilean RUT (Rol Único Nacional) instead of an SSN on Form SS-4?

No, you cannot use your Chilean RUT. For line 7b of Form SS-4, if you do not have a U.S. SSN or ITIN, you must write 'Foreign'.

Do I need to form a U.S. LLC to get an EIN as a Substack writer in Chile?

Not necessarily. You can obtain an EIN as a sole proprietor if you are earning income through U.S. platforms and require a tax ID. However, forming a U.S. LLC is often recommended for liability protection and can be a prerequisite for opening some U.S. bank accounts. You can learn more about forming a U.S. LLC on our site.

How long does it take to get an EIN via fax for a non-resident?

Applying for an EIN via fax for non-residents typically takes 3–5 weeks. This timeframe can vary depending on IRS processing volumes.

What is the difference between an EIN and an ITIN for a Chilean writer?

An EIN is a federal tax identification number for businesses, while an ITIN is for individuals who need to report U.S. income but do not qualify for an SSN. As a Substack writer, you might need an EIN for business operations and payment processing, and potentially an ITIN if you are filing personal U.S. tax returns.

Can I open a U.S. bank account with just an EIN?

While an EIN is a key requirement for opening a U.S. bank account as a non-resident, most U.S. banks will also require proof of your business formation (like a U.S. LLC's formation documents) and potentially a U.S. mailing address or a representative in the U.S.

Does the U.S.-Chile tax treaty affect my EIN application?

The U.S.-Chile tax treaty primarily governs withholding taxes on certain types of income and avoids double taxation. It does not directly impact the process of applying for an EIN, which is a U.S. federal tax identification number. However, understanding the treaty can be important for your overall tax strategy related to U.S. income.

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