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EIN application reference for Substack writers based in Vietnam
EIN12 min read

An EIN Guide for Substack writers from Vietnam

Substack writers in Vietnam need an EIN for US entity setup, tax compliance, and financial operations. Understand the process, required documents, and common pitfalls.

Reviewed by , ITIN Specialist at itin.net.

Substack Writers in Vietnam Face Unique EIN Hurdles

Substack writers based in Vietnam encounter specific challenges when needing an Employer Identification Number (EIN). Unlike U.S. residents, you cannot apply online using the IRS portal if you lack a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). This immediately directs you to the slower, mail-based application process or the faster, but more involved, Certified Acceptance Agent (CAA) channel. The primary friction point is the inability to self-serve the EIN application online, requiring a more complex approach due to your non-resident status and lack of a U.S. taxpayer identification number. This guide clarifies the requirements and process for obtaining an EIN in your specific situation.

When You Need an EIN for Your Substack Business

An EIN is a federal tax identification number issued by the IRS to business entities operating in the U.S. For Substack writers in Vietnam, an EIN becomes necessary in several key scenarios. If you are operating as a U.S. entity, such as a U.S. LLC, to receive payments or structure your business, an EIN is mandatory. Platforms like Stripe, which is commonly used for Substack payouts, may require an EIN for tax reporting purposes, especially if you're receiving significant income or operating through a U.S. business structure. Furthermore, if you plan to hire employees in the U.S. or open a U.S. bank account under your business name, an EIN is a prerequisite. While not always strictly required for sole proprietors without employees, establishing a U.S. LLC for your Substack operations often necessitates an EIN for compliance and operational ease.

Required Documents for Non-Resident EIN Applications

Applying for an EIN as a non-resident requires specific documentation to verify your identity and business details. The core form is IRS Form SS-4, Application for Employer Identification Number. You will need to accurately complete this form, paying close attention to line 7b. If you do not have an SSN or ITIN, you must write 'Foreign' in this field. The primary identification document required for the responsible party is a valid passport. Additionally, if you have formed a U.S. business entity, such as a U.S. LLC, you must provide your business formation documents. These typically include your Articles of Organization or Certificate of Incorporation, and potentially an Operating Agreement. A U.S. business address is also often required; this can be a physical address or a mail-forwarding service address. Ensure all documents are clear, legible, and accurately reflect your legal name and business information.

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. Since you cannot use the online IRS portal without an SSN or ITIN, your options are the U.S. mail or fax, or engaging a Certified Acceptance Agent (CAA). Applying via fax or mail typically involves mailing or faxing your completed Form SS-4 to the IRS. This method can take 3–5 weeks for processing. The alternative, and often faster, method is to use a Certified Acceptance Agent. A CAA, like itin.net, can verify your identity and application details, submitting them to the IRS on your behalf. This expedited process can often result in receiving your EIN within 3–5 business days. The CAA verifies your documentation and acts as an intermediary, significantly speeding up the IRS's review and issuance of the EIN.

Common Mistakes for Substack Writers in Vietnam

Substack writers in Vietnam often make specific errors when applying for an EIN. A frequent pitfall is incorrectly filling out line 7b of Form SS-4. If you do not possess an SSN or ITIN, you must explicitly write 'Foreign' in this field; leaving it blank or entering incorrect information can lead to rejection. Another common mistake is using a personal address as the business address when a distinct U.S. business address is required for the entity. For those forming a U.S. LLC, ensure your formation documents are complete and accurate. Mismatched names between your passport and business formation documents can also cause delays or rejections. Lastly, attempting to apply online without a U.S. taxpayer identification number will result in an automatic failure, forcing you to use the mail or fax method, or a CAA.

Benefits of Using a Certified Acceptance Agent (CAA)

Engaging a Certified Acceptance Agent, such as itin.net, offers distinct advantages for Substack writers in Vietnam seeking an EIN. As a CAA, itin.net is authorized by the IRS to verify your identity and application details. This verification process significantly reduces the risk of application errors that could lead to delays or rejections. By having a CAA submit your Form SS-4, you bypass the lengthy processing times associated with mail or fax applications, which can take several weeks. The CAA channel typically yields an EIN within 3–5 business days. This expedited service is particularly valuable for businesses needing to establish operations quickly, such as opening a U.S. bank account or meeting platform requirements for payouts. The CAA acts as your trusted intermediary, ensuring accuracy and speed in the application process.

Next Steps After Obtaining Your EIN

Once you receive your EIN, you can proceed with establishing your U.S. business operations. The next crucial step for many Substack writers is opening a U.S. bank account. This allows you to separate business and personal finances, manage Stripe payouts efficiently, and present a more professional financial front. Ensure you have your EIN confirmation letter (CP-575) readily available, as banks will require it. If you formed a U.S. LLC, you will also need your formation documents and Operating Agreement. Additionally, depending on your business activities and income, you may need to file specific U.S. tax returns, such as Form 5472 for reporting transactions with a foreign-owned U.S. disregarded entity. Review the pricing for EIN services at itin.net or contact us for personalized assistance.

Practical tips

  • Use the same legal name across all your application documents (passport, business formation documents, Form SS-4) to avoid mismatches.
  • Ensure your U.S. business address is valid and can receive mail; this is a common requirement for EIN applications.
  • When filling out Form SS-4 and you do not have an SSN or ITIN, write 'Foreign' on line 7b.
  • If you formed a U.S. LLC, have your Articles of Organization and Operating Agreement ready before starting the EIN application.
  • Consider using a Certified Acceptance Agent (CAA) for a faster, more streamlined EIN application process, especially given your non-resident status.

Frequently asked questions

Can I get an EIN for my Substack business if I live in Vietnam?

Yes, as a non-resident of the U.S. living in Vietnam, you can obtain an EIN. However, you cannot apply online through the IRS portal unless you have a U.S. SSN or ITIN. You must apply via fax, mail, or through a Certified Acceptance Agent (CAA).

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

Applying via mail or fax can take 3–5 weeks. Using a Certified Acceptance Agent (CAA) like itin.net can expedite the process, often resulting in an EIN within 3–5 business days.

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

Yes, you generally need a U.S. address for your business when applying for an EIN. This can be a physical location or a mail-forwarding service address.

What if I don't have a U.S. Social Security Number (SSN) or ITIN?

If you do not have an SSN or ITIN, you must write 'Foreign' on line 7b of IRS Form SS-4. You will also be ineligible to apply online via the IRS portal and must use the mail, fax, or CAA methods.

Is forming a U.S. LLC necessary for Substack writers in Vietnam?

Forming a U.S. LLC is not always mandatory, but it is often recommended for Substack writers in Vietnam who want to operate as a formal U.S. business, open a U.S. bank account, and simplify tax reporting. An LLC structure typically requires an EIN.

Will Stripe accept my EIN for Substack payouts?

Yes, Stripe commonly requires an EIN for tax reporting purposes, especially for businesses operating in the U.S. or receiving substantial payouts. Providing your EIN helps ensure accurate tax compliance with the IRS.

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