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ITIN application reference for Substack writers based in Latvia
ITIN15 min read

An ITIN Guide for Substack writers from Latvia

Latvian Substack writers need an ITIN for U.S. tax compliance. Learn how to apply, the documents required, and common pitfalls to avoid.

Reviewed by , ITIN Specialist at itin.net.

Substack Writers in Latvia Face Unique Tax Reporting Triggers

As a Substack writer based in Latvia, you may encounter specific U.S. tax reporting requirements that necessitate an Individual Taxpayer Identification Number (ITIN). Platforms like Substack, which facilitate payments from U.S. persons or entities, often require a U.S. tax identification number for reporting purposes. This is typically because Stripe, the payment processor commonly used by Substack, needs to issue Form 1099-NEC (Nonemployee Compensation) or similar tax forms to non-U.S. persons earning over $600 annually from U.S. sources. Without an ITIN or an Employer Identification Number (EIN), your U.S.-sourced income may be subject to backup withholding at a higher rate. The Latvia–U.S. tax treaty may offer some relief, but proper reporting is still essential to claim any treaty benefits. Understanding these triggers is the first step in ensuring compliance and avoiding potential issues with both Substack and the IRS.

ITIN Eligibility and Application Triggers for Latvian Substack Writers

You generally need an ITIN if you are a non-resident alien who is required to file a U.S. tax return or report U.S. income but cannot obtain a Social Security Number (SSN). For Substack writers in Latvia, the primary trigger is receiving payments exceeding $600 from U.S.-based subscribers or from Substack itself, if it's considered a U.S. payor for tax purposes. Stripe, as the payment processor, will likely report these payments to the IRS. Even if Substack itself isn't directly paying you, but rather U.S. subscribers are paying through a U.S.-based platform, the IRS may still require reporting. You may also need an ITIN if you are claiming treaty benefits on U.S. income or if you are required to file a U.S. tax return for other reasons, such as having U.S. investments. The absence of an SSN is the key eligibility criterion for an ITIN.

Required Documentation for Your ITIN Application

To apply for an ITIN, you will need to complete IRS Form W-7, Application for IRS Individual Taxpayer Identification Number. This form requires accurate personal information, including your name, foreign address, and U.S. taxpayer identification number (if you have one, though typically you won't if you need an ITIN). You must also submit original identification documents or certified copies from the issuing agency. The most commonly accepted document is a valid, unexpired passport. If you do not have a passport, other documents such as a national identity card, birth certificate, or driver's license may be used, but these must be presented in combination with other supporting documents to meet the IRS's identification requirements. In addition to the Form W-7, you will need to provide documentation proving your U.S. tax liability or your need for an ITIN, such as a U.S. tax return (e.g., Form 1040-NR for non-resident aliens) or a statement explaining why you need an ITIN. For Substack writers, this might involve attaching a copy of a prior year's tax return if you've already filed, or a statement explaining your Substack income and why it necessitates an ITIN for tax reporting purposes.

The ITIN Application Process: Steps and Timeline

The process for obtaining an ITIN involves several key steps. First, you must accurately complete and sign Form W-7. Next, you need to gather your original identification documents and any required supporting tax documentation. You then have three options for submitting your application: mail your application and original documents directly to the IRS, visit an IRS Taxpayer Assistance Center (TAC) that offers ITIN services, or use the services of a Certified Acceptance Agent (CAA). The CAA route, offered by services like itin.net, is often preferred as they can verify your original documents and forward your application to the IRS without you having to mail your originals. When applying through a CAA, the processing time for your ITIN is typically much faster, often within 5–10 business days. If you mail your application directly to the IRS or visit a TAC, the processing time can be significantly longer, ranging from several weeks to several months, and you risk losing your original documents during transit. Once the IRS processes your application, they will issue you a CP-565 letter containing your ITIN.

Common Mistakes for Latvian Substack Writers

Substack writers in Latvia often make specific errors on their Form W-7 applications. A frequent mistake is incorrectly filling out the name fields. Ensure the name on your Form W-7 exactly matches the name on your passport or other identification documents. Mismatched names are a leading cause of rejection. Another common pitfall is failing to include a valid U.S. tax return or a sufficiently detailed explanation for why you need an ITIN. For Substack income, simply stating 'Substack income' might not be enough; you may need to explain the source and nature of the income. Missing or uncertified copies of identification documents are also common issues. Remember, if you are not using a Certified Acceptance Agent (CAA), you must send original documents or certified copies from the issuing agency to the IRS, which carries a risk of loss. Lastly, incorrectly claiming treaty benefits without understanding the specific articles and requirements can lead to denial. The Latvia–U.S. tax treaty has specific provisions that must be met.

Benefits of Using a Certified Acceptance Agent (CAA)

Using a Certified Acceptance Agent (CAA) like itin.net streamlines the ITIN application process significantly. CAAs are authorized by the IRS to help individuals apply for ITINs. The primary advantage is that CAAs can verify your original identification documents, such as your passport, and return them to you immediately. This eliminates the risk of mailing your valuable original documents to the IRS and waiting months for their return. Instead of sending your originals, the CAA sends certified copies along with your Form W-7 to the IRS. This significantly speeds up the processing time; CAAs typically receive ITIN assignments within 5–10 business days. Furthermore, CAAs are trained to help ensure your Form W-7 is completed accurately, reducing the likelihood of errors that lead to application delays or rejections. This expertise is particularly valuable for individuals with complex situations or those unfamiliar with U.S. tax forms and procedures.

Next Steps After Receiving Your ITIN

Once you receive your ITIN via a CP-565 letter from the IRS, you can use it for all future U.S. tax filings and reporting requirements. For Substack writers in Latvia, this means you can provide your ITIN to Stripe or Substack to ensure accurate tax reporting and avoid backup withholding. You will use this ITIN when filing your annual U.S. non-resident tax return (Form 1040-NR), if required. If you plan to open a U.S. bank account, your ITIN can often be used for that purpose as well, although some banks may have specific requirements. For those considering expanding their U.S. business presence, an ITIN can be a stepping stone towards establishing a U.S. entity, which might eventually require an EIN for business operations. If you have further questions or require assistance with your ITIN application, consider reviewing the pricing for our services at itin.net or contacting us directly.

Practical tips

  • Ensure your name on Form W-7 precisely matches your passport and any other IRS-issued documentation to prevent common rejections.
  • If using a postal service to submit your application, send only certified copies of your identification documents from the issuing agency, not originals, to mitigate loss risk.
  • Accurately document your U.S. income source, such as Substack payments, and clearly state the reason for needing an ITIN on Form W-7 or accompanying statements.
  • Consult the official IRS guidance on the Latvia–U.S. tax treaty to confirm eligibility for any claimed benefits before filing your tax return.
  • If your passport is expired but still valid for identification purposes according to your country of issue, confirm with the IRS if it can be accepted; otherwise, use another primary identification document.

Frequently asked questions

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

Yes, many U.S. banks accept an ITIN as a valid form of identification for non-residents to open a U.S. bank account. However, specific bank policies vary, so it's advisable to check with the bank directly. Having an ITIN can significantly simplify this process.

How long does it take to get an ITIN through itin.net?

When you apply through a Certified Acceptance Agent (CAA) like itin.net, the IRS typically assigns an ITIN within 5–10 business days. This is considerably faster than mailing your application directly to the IRS, which can take several weeks or months.

What if my Substack income is paid in Euros, not U.S. Dollars?

Even if you receive payments in Euros, if the source of the income is U.S.-based subscribers or a U.S. platform like Substack, it is considered U.S.-sourced income for tax purposes. You will likely still need an ITIN for reporting to the IRS, and you will need to convert the Euro amount to U.S. dollars at the appropriate exchange rate for your tax return.

Do I need an ITIN if my Substack earnings are less than $600?

Generally, the IRS requires Form 1099-NEC to be issued for payments totaling $600 or more. However, you may still need an ITIN if you are required to file a U.S. tax return for other reasons or if you wish to claim any benefits under the Latvia–U.S. tax treaty. It is best to consult with a tax professional to determine your specific filing obligations.

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

An ITIN is for individuals who need a U.S. tax ID for personal tax filing but cannot get an SSN. An EIN (Employer Identification Number) is for businesses. As a sole proprietor Substack writer, you would typically need an ITIN. If you were to form a U.S. LLC or corporation, that entity would need an EIN.

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

No, your Latvian tax identification number is not a substitute for a U.S. ITIN. The IRS requires a U.S. tax identification number for individuals who must file U.S. taxes but do not qualify for an SSN. You will need to apply for an ITIN specifically.

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