Why Substack Writers in Bulgaria Need an ITIN
Substack writers based in Bulgaria face a specific challenge when receiving payments from U.S. platforms like Stripe: tax reporting. Stripe, acting as a U.S. payor, is required to report these payments to the IRS. Without a U.S. Taxpayer Identification Number, such as an Social Security Number (SSN) or an Individual Taxpayer Identification Number (ITIN), Stripe may be required to withhold a portion of your earnings at the highest U.S. income tax rate (30%). This withholding can significantly reduce your net income. An ITIN is necessary to avoid or minimize this withholding, especially since you, as a non-U.S. resident, likely do not qualify for an SSN. The U.S.-Bulgaria tax treaty may offer reduced withholding rates, but claiming these benefits requires proper U.S. tax identification. Therefore, obtaining an ITIN is not merely an option but a practical necessity for Bulgarian Substack writers to ensure compliant and efficient receipt of their earned income from U.S.-based platforms.
When is an ITIN Required for Bulgarian Substack Writers?
An ITIN is required for Bulgarian Substack writers primarily when they receive payments from U.S. sources and need to file a U.S. tax return or comply with U.S. tax reporting requirements. Stripe, your primary payout provider, is a U.S. company that reports payments made to non-U.S. persons to the IRS. If you do not provide Stripe with a U.S. Taxpayer Identification Number, they are obligated by IRS regulations to withhold 30% of your earnings. This is a mandatory backup withholding requirement. Even if you believe your U.S. income falls below a threshold that would typically require filing a U.S. tax return, the platform's reporting obligations often necessitate an ITIN. Furthermore, to benefit from any reduced withholding rates under the U.S.-Bulgaria tax treaty, you typically need to provide a U.S. Taxpayer Identification Number to the withholding agent (Stripe, in this case). Without it, the default 30% rate applies. The ITIN serves as your unique identifier for these U.S. tax obligations.
Required Documents for Your ITIN Application
Applying for an ITIN involves submitting Form W-7, Application for IRS Individual Taxpayer Identification Number. This form requires detailed personal information, including your name, foreign address, and reason for applying. Alongside the Form W-7, you must provide original or certified copies of documents proving your identity and foreign status. The IRS strongly prefers a valid passport as the primary identification document. If a passport is not available, other identification documents may be accepted, such as a national identity card or a birth certificate, but these often require additional supporting documentation. You will also need to submit documentation that supports your reason for applying for an ITIN. For Substack writers in Bulgaria, this typically means submitting a copy of your U.S. federal income tax return (e.g., Form 1040-NR), unless you qualify for an exception. The U.S.-Bulgaria tax treaty may allow for claiming treaty benefits on certain types of income, which would be detailed on your tax return or a specific statement attached to the Form W-7. Ensure all documentation is current and accurately reflects your legal name. Mismatched information is a common reason for application delays or rejections.
The ITIN Application Process for Bulgarian Writers
The ITIN application process for Substack writers in Bulgaria can be completed through several methods. The most common and efficient is by working with a Certified Acceptance Agent (CAA). As a CAA, itin.net can verify your original documentation, such as your passport, and submit your Form W-7 directly to the IRS on your behalf. This method typically results in a processing time of 5–10 business days. Alternatively, you can mail your original identification documents and Form W-7 directly to the IRS in the United States. This process is significantly slower, with IRS processing times that can range from 7 to 11 weeks, and carries the risk of losing your original documents in transit. A third option is to apply in person at a designated IRS Taxpayer Assistance Center (TAC) within the U.S., which is generally not feasible for residents of Bulgaria. Given the timeline and security considerations, using a Certified Acceptance Agent is the recommended path for most applicants.
Common Mistakes for Substack Writers in Bulgaria
Substack writers based in Bulgaria often make specific errors when applying for an ITIN. A frequent mistake is failing to correctly identify the reason for needing an ITIN on Form W-7. For most writers receiving payments via Stripe, the reason is to comply with backup withholding requirements and to claim treaty benefits. Ensure you select the appropriate box and provide the necessary documentation supporting this claim. Another common pitfall is submitting incomplete tax returns or failing to attach the required supporting statement when claiming treaty benefits. If you are claiming a reduced withholding rate under the U.S.-Bulgaria tax treaty, you must accurately complete your U.S. tax return (Form 1040-NR) and ensure it aligns with the information provided on your Form W-7. Mismatched names or addresses between your identification documents, Form W-7, and your tax return will lead to rejection. Finally, some writers mistakenly believe they need an EIN (Employer Identification Number) instead of an ITIN for their newsletter income. An EIN is for businesses, whereas an ITIN is for individuals needing a U.S. tax ID. For Substack income reported on your personal tax return, an ITIN is the correct identification number.
Benefits of Using a Certified Acceptance Agent (CAA)
Working with a Certified Acceptance Agent (CAA) like itin.net offers significant advantages for Substack writers in Bulgaria applying for an ITIN. The primary benefit is that a CAA can authenticate your original identification documents, such as your passport, eliminating the need to mail these sensitive originals to the IRS. This significantly reduces the risk of loss or theft. Furthermore, a CAA reviews your completed Form W-7 and supporting documentation for accuracy and completeness before submitting it to the IRS. This pre-screening process helps prevent common errors that often lead to application delays or rejections. Because CAAs have a direct submission process with the IRS, the typical processing time for an ITIN application through a CAA is much faster, usually within 5–10 business days, compared to the weeks or months it can take when mailing documents directly to the IRS. This expedited process ensures you receive your ITIN promptly, allowing you to submit it to Stripe and avoid backup withholding.
Next Steps After Receiving Your ITIN
Once you receive your IRS-issued ITIN, the next crucial step is to provide it to Stripe to avoid backup withholding on future payments. Update your tax information in your Stripe account by entering your newly issued ITIN. This will ensure that future earnings are paid out without the 30% U.S. tax withholding. You should also keep your ITIN documentation safe, as you will need it for future U.S. tax filings. If you anticipate earning U.S. source income in the future, or if your tax situation changes, you may need to file U.S. tax returns annually. Consider consulting with a tax professional specializing in U.S. expat taxation to ensure ongoing compliance. For assistance with your ITIN application or to understand your ongoing U.S. tax obligations, review our pricing or contact itin.net for expert guidance.
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 passport is valid and has not expired; an expired passport will not be accepted as a primary identification document.
- Accurately complete Form 1040-NR and attach a statement explaining your eligibility for treaty benefits; this is critical for claiming reduced withholding rates.
- If you are applying with dependents, ensure each dependent also has a valid ITIN or is included on your Form W-7 application with their own supporting identification documents.
- Keep a complete copy of your submitted Form W-7 and all supporting documents for your records; this is essential for future reference and tax filings.
Frequently asked questions
Do I need an ITIN if my Substack income from Bulgaria is less than $10,000?
Yes, even if your income is below a certain threshold, Stripe (as a U.S. payor) is required to report your earnings to the IRS. If you do not provide a U.S. Taxpayer Identification Number, they will likely apply backup withholding at 30%. An ITIN is needed to avoid this withholding and potentially claim reduced rates under the U.S.-Bulgaria tax treaty.
Can I use my Bulgarian national ID instead of a passport for my ITIN application?
While a passport is the preferred identification document for ITIN applications, other documents like a national identity card may be accepted if they contain your name, photograph, address, date of birth, and expiration date. However, a passport is generally the most straightforward option. You will need to submit original or certified copies.
How long does it take to get an ITIN?
When applying through a Certified Acceptance Agent (CAA) like itin.net, the process typically takes 5–10 business days for the IRS to issue the ITIN after submission. If you mail your application directly to the IRS, it can take 7–11 weeks or longer.
What is the difference between an ITIN and an EIN for a Substack writer?
An ITIN (Individual Taxpayer Identification Number) is for individuals who need a U.S. tax ID but do not qualify for an SSN. An EIN (Employer Identification Number) is for businesses. As a Substack writer receiving personal income, you will need an ITIN for your U.S. tax reporting and to provide to payment processors like Stripe.
Do I need to file a U.S. tax return every year once I have an ITIN?
Having an ITIN does not automatically obligate you to file a U.S. tax return annually. However, if you have U.S. source income that was not fully taxed via withholding, or if you wish to claim certain tax refunds or treaty benefits, you may need to file. It is advisable to consult with a U.S. tax professional to determine your specific filing requirements.
Can itin.net help me claim tax treaty benefits?
Yes, as a Certified Acceptance Agent, itin.net assists with the ITIN application process, including reviewing the documentation and forms necessary to support claims for tax treaty benefits. We ensure your application is complete and accurate to help you qualify for reduced withholding rates under the U.S.-Bulgaria tax treaty.



