Complete Guide to Obtaining an IRS EIN for International Founders

An Employer Identification Number (EIN) is a unique nine-digit tax identifier issued by the Internal Revenue Service (IRS) for US business entities. Non-resident business owners without a Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN) can obtain an EIN by completing IRS Form SS-4 and submitting it via fax to the IRS international operation unit at +1-304-707-9471, or by mailing it to the IRS center in Cincinnati, Ohio. This offline application bypasses the online portal which strictly requires an SSN or ITIN.

The Employer Identification Number, also referred to as a Federal Employer Identification Number (FEIN) or Federal Tax Identification Number, acts as the corporate equivalent of a Social Security Number. It is the primary identifier used by the United States federal government, state authorities, financial institutions, and commercial merchant processors to track and regulate the financial and tax obligations of a business entity. While the name implies that the number is only for businesses with employees, this is a common misunderstanding. Any legal business entity operating within the jurisdiction of the United States—including single-member limited liability companies (LLCs) owned by non-residents—must obtain an EIN to perform essential commercial activities.

Understanding the legal and administrative framework surrounding the EIN is critical for international founders. The Internal Revenue Code (IRC) regulates how business entities are taxed, and federal regulations require specific identifiers to ensure compliance with tax laws, anti-money laundering (AML) protocols, and the Bank Secrecy Act (BSA). For non-US residents establishing a presence in the United States, the EIN is the primary link between their foreign-owned entity and the US financial system. Without it, the company exists only on paper at the state level but remains completely isolated from the banking, payment processing, and federal tax filing infrastructure.

Legal and Operational Mandates for Business Tax Identifiers

The operational necessity of the EIN extends far beyond basic tax compliance. Under federal banking regulations, specifically the Customer Due Diligence (CDD) rule enforced by the Financial Crimes Enforcement Network (FinCEN), US financial institutions are required to verify the identity of the legal entities opening accounts. This process is commonly known as Know Your Customer (KYC). A fundamental component of this verification is obtaining and validating the entity's tax identification number. Consequently, no reputable bank or digital financial platform in the United States will open a business checking, savings, or merchant account without a verified EIN.

Furthermore, global payment gateways such as Stripe, PayPal, and Shopify Payments operate under strict regulatory oversight. These platforms must verify the tax classification of any business using their services to process credit card payments. They achieve this by cross-referencing the EIN provided during registration with the IRS database. If a business cannot provide a valid EIN, or if the database validation fails, the payment processor is legally obligated to suspend payouts and freeze the merchant account. This makes the EIN an absolute prerequisite for any e-commerce, software-as-a-service (SaaS), or digital services company looking to sell to US clients or collect payments in US dollars.

In addition to financial operations, the EIN is required for regulatory and information filing. For foreign-owned single-member LLCs, which are classified by the IRS as disregarded entities for tax purposes, the federal government mandates the annual filing of Form 5472 and Form 1120 pro-forma. Form 5472 is an information return that reports transactions between the US LLC and its foreign owner. Under Section 6038A of the Internal Revenue Code, failure to file this form or filing it incorrectly carries a minimum penalty of $25,000. To submit Form 5472 and Form 1120, the LLC must have a valid EIN. The IRS will reject any filing that does not include the correct nine-digit identifier, exposing the international founder to substantial financial penalties.

The Role of the EIN in Federal Tax Reporting

From a federal tax perspective, the EIN serves as the key reference point for all communications and filings with the IRS. For multi-member LLCs (which are treated as partnerships by default) or LLCs that have elected to be taxed as corporations (either S-Corporations or C-Corporations), the EIN is used on all income tax returns, information returns, and employment tax filings. Even if the business has no physical office, no employees, and no US-sourced income, the presence of a corporate structure in the United States creates a reporting obligation that can only be fulfilled using the EIN.

In summary, the Employer Identification Number is the foundational cornerstone of a US business's legal and financial identity. Whether your goal is to launch a global e-commerce store on Amazon FBA, bill international clients through a professional consulting firm, or raise capital from US venture capitalists, you must secure this identifier. The remainder of this guide details the exact procedures, documentation, and compliance steps required for foreign founders to successfully navigate the IRS bureaucracy and obtain their EIN.

For US citizens and residents who possess a valid Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN), the process of obtaining an EIN is highly streamlined. The IRS provides an online application assistant on its official website that operates during specific hours (Monday through Friday, 7:00 AM to 10:00 PM Eastern Time). This online system validates the applicant's identity instantly against social security records and generates an EIN confirmation letter (CP 575) immediately upon completion. The entire digital process takes less than ten minutes.

However, for international founders who do not reside in the United States and do not have an SSN or an ITIN, the online portal is completely blocked. The digital application requires the input of a valid US taxpayer identification number to proceed past the initial screen. Any attempt to use temporary numbers, foreign passport numbers, or dummy digits will result in an immediate system error. This restriction forces non-resident business owners to use the manual, offline application channels established by the IRS. These manual processes are governed by different rules, longer timelines, and specific processing units within the federal tax agency.

Comparing Offline Paths: Digital Fax vs. Mail

When applying for an EIN without an SSN or ITIN, there are two primary methods for submitting the application: faxing Form SS-4 or mailing the physical form. Understanding the differences between these two routes is essential for planning your business launch timeline, as the processing times and reliability of each path vary significantly.

The first option is submitting Form SS-4 via fax. This is the most efficient and recommended route for international founders. Under this method, the applicant completes the physical Form SS-4, signs it, and transmits it via a digital fax service to the IRS International EIN Operation. Upon receipt, a dedicated team of IRS agents reviews the document. If the form is filled out correctly, the agent manually assigns an EIN, writes the number directly on the top margin of the submitted Form SS-4, stamps it with the official IRS seal, and faxes it back to the return fax number provided in the application. This process bypasses the delays associated with physical mail transit. The typical turnaround time for faxed applications is fifteen to thirty business days, though this can fluctuate based on the seasonal workload of the IRS.

The second option is submitting Form SS-4 via physical mail. In this scenario, the applicant prints the completed and signed form and sends it to the IRS processing center in Cincinnati, Ohio. Once the IRS receives and processes the application, they generate a physical EIN confirmation letter (CP 575) and send it via the United States Postal Service (USPS) to the mailing address listed on the form. For international founders using a virtual mailbox or a mail forwarding service in the US, this means the letter must first arrive at the virtual mailbox before being scanned and uploaded to the client's online portal. Because international transit and manual mail handling add significant delay, this route routinely takes between forty-five and ninety days. Furthermore, physical mail is susceptible to loss or misrouting, making this method highly inefficient.

Given these timelines, digital faxing represents the standard operational path for any business that requires its tax ID within a reasonable timeframe. It allows the founder to maintain a clear digital paper trail, monitor transmission status, and receive the issued EIN directly in their email inbox through virtual fax routing. In the subsequent sections, we detail the specific data entries required to complete Form SS-4 and ensure it passes the rigorous inspection of the IRS agents without triggering a rejection.

To avoid IRS rejections or delays, Form SS-4 must be filled out with absolute precision. Any discrepancy between your state-approved Articles of Organization and your Form SS-4 will cause the IRS agent to reject your application. This line-by-line guide provides the specific inputs required for a foreign-owned US LLC to ensure compliance and quick processing.

Analysis of Key Fields for Foreign-Owned US Entities

The Form SS-4 is a two-page document, but only the first page is filled out and submitted. The second page contains instructions and definition terms. The IRS uses the data provided on page one to categorize your business, determine your tax filing requirements, and register the entity in their internal database. Below is a detailed analysis of the critical lines that must be completed:

• Line 1: Legal Name of Entity: You must write the exact legal name of your LLC as it appears on the certified copy of your Articles of Organization or Certificate of Formation issued by the state of registration. This includes the corporate designator such as "LLC", "L.L.C.", or "Limited Liability Company". Any spelling error, missing punctuation, or mismatch in spacing will result in the application being rejected or filed under an incorrect name. Do not use abbreviations unless they are part of the official name.
• Line 2: Trade Name of Business: If your company operates under a Doing Business As (DBA) or trade name different from its legal name, enter it here. Otherwise, leave this line blank. For most new entities, leaving this blank is the standard practice.
• Line 3: Executor, Administrator, Trustee, or "Care Of" Name: For an LLC, this line is typically left blank unless you are designating a third-party designee or a specific individual to receive communications. If you are handling the application yourself, you do not need to fill this out.
• Line 4a-4b: Mailing Address: This is the address where the IRS will mail all official notices, tax forms, and your physical EIN confirmation letter (CP 575). For international founders, this should be a reliable US virtual business address or mail forwarding address. Ensure that the address is written exactly as required by your mail provider, including any suite, PMB, or apartment numbers. The IRS system has character limits, so keep the address clear and concise.
• Line 5a-5b: Street Address of Business: This is the physical location of the business. If the physical location is outside the United States, you must enter your foreign home or business address here. However, to maintain a strong US business profile and comply with banking KYC policies, many founders use their US virtual business address for both Line 4 and Line 5. If using a virtual address, ensure it is a physical street address and not a post office box (P.O. Box). The IRS will reject applications that list a P.O. Box as the physical street address.
• Line 6: County and State where principal business is located: Enter the county and US state where your virtual address or physical office is located. For example, if you are registered in Wyoming and use a virtual address in Cheyenne, you would write "Laramie, WY". If your physical business location in Line 5 is outside the US, write the foreign country and province.
• Line 7a-7b: Name of Responsible Party and Taxpayer Identification Number: The responsible party must be an individual who controls, manages, or directs the entity. For a single-member LLC, this is the owner. You must write your full legal name exactly as it appears on your passport. In Line 7b, if you do not have an SSN or ITIN, you must write the word "FOREIGN" or "FOREIGNUS" in the box. Do not leave this box blank, as the IRS processing system may flag it as an incomplete application. Writing "FOREIGN" signals to the agent that the applicant is an international founder who is exempt from the US personal tax ID requirement for this application.
• Line 8a-8c: Limited Liability Company (LLC) Information: On Line 8a, check the box marked "Yes" to confirm that the entity is an LLC. On Line 8b, enter the exact number of members (owners) of the LLC. If you are the sole owner, write "1". On Line 8c, check the box marked "Yes" if the LLC was organized in the United States or a US possession.
• Line 9a: Type of Entity: For a single-member LLC owned by a non-resident, the standard tax classification is a "disregarded entity" (also known as a branch of a foreign owner). To select this classification, you must check the box marked "Other" and write "Foreign-owned disregarded entity" on the line next to it. Do not check the boxes for "Corporation" or "Partnership" unless you have already filed Form 8832 to elect that specific tax treatment. Checking the wrong box will cause the IRS to set up incorrect tax filing obligations in their system.
• Line 10: Reason for Applying: You must check the box that best describes why you are requesting an EIN. The standard option is "Started new business". On the blank line next to it, you should write a brief, clear explanation of your business activity and operational need. A highly effective and standard phrase is: "To open a US business bank account and process digital payment transactions." This informs the IRS agent of the exact commercial purpose of the application.
• Line 11: Date business started or acquired: Enter the date your LLC was officially registered with the state, using the format MM/DD/YYYY. This date can be found on your approved Articles of Organization.
• Line 12: Closing month of accounting year: For most standard business entities, the tax year matches the calendar year. Enter "December" here. This establishes a December 31st closing date, which is standard for disregarded LLCs and aligns with the annual filing deadlines for Form 5472.
• Line 13: Highest number of employees expected in the next 12 months: If you do not plan to hire W-2 employees in the United States, enter "0" in all three boxes (Agricultural, Household, Other). If you write a number greater than zero, the IRS will flag your company as a payroll tax filer and expect you to submit Form 940 and Form 941 quarterly. This creates unnecessary administrative burdens and potential penalties if you fail to file.
• Line 14: Do you expect to have $1,000 or less in employment tax liability? Since you entered "0" employees on Line 13, you do not need to check this box. Leave it blank.
• Line 15: First date wages or annuities were paid: Leave this line blank, as you have no employees.
• Line 16: Principal activity of the business: Check the box that matches your industry. If your industry is not listed (e.g., e-commerce, software development, consulting), check the box marked "Other" and write your specific activity (e.g., "E-commerce retail", "Software engineering services", or "Digital marketing consulting").
• Line 17: Principal line of merchandise or service: Provide a brief description of the products or services your business offers. For example: "Online sale of physical consumer goods via e-commerce platforms" or "Providing remote software development consulting services to business clients."
• Line 18: Has the applicant entity ever applied for an EIN before? Check "No" if this is the first time you are requesting an EIN for this specific LLC.

Finally, at the bottom of the page, the responsible party must sign, date, and print their name. The signature must be a handwritten signature or a valid digital signature that complies with IRS electronic signature standards. The IRS accepts digital signatures generated by secure systems like DocuSign, provided they show the digital audit trail. Along with the signature, write your telephone number and fax number (including country codes). Providing a return fax number is critical, as it is the exact fax number the IRS will use to transmit your processed Form SS-4 containing your new EIN. Double-check all inputs before moving to the submission phase.

Once Form SS-4 is fully drafted, checked, and signed by the responsible party, you must submit it to the specialized IRS international unit. Because the IRS does not utilize modern secure email systems for paper applications, digital faxing is the fastest communication channel. To navigate this process successfully, founders must understand the administrative structure of the IRS and follow strict submission protocols.

Understanding IRS Fax Routing: Cincinnati vs. Ogden

The IRS operates multiple processing centers across the United States, with the primary centers for business filings located in Cincinnati, Ohio, and Ogden, Utah. Historically, domestic applications were split geographically between these two centers to balance processing volumes. However, for international applications—specifically those submitted by entities where the principal place of business is outside the United States, or where the responsible party has no legal residency in the US—all EIN operations have been centralized under the **Cincinnati IRS International Operations** unit.

While domestic fax lines (such as +1-855-641-6935) route to domestic processing queues that require an SSN or ITIN to process, the international fax line connects to a specialized unit. The official and dedicated fax number for international applications is **+1-304-707-9471**. Sending your Form SS-4 to a domestic fax line when you have written "FOREIGN" in Line 7b will result in the application being rejected or ignored, as the domestic agents do not have the authorization or system access to process applications without verified US taxpayer IDs. Therefore, ensuring that your fax is transmitted to the +1-304-707-9471 number is critical.

Step-by-Step Digital Faxing Checklist

Because most international founders do not own a physical fax machine, utilizing a digital fax service is the standard operational method. Services like Fax.plus, eFax, HelloFax, or MyFax allow you to send documents to US numbers and receive incoming faxes as PDF files in your email. When setting up your digital fax service, you must obtain a dedicated return fax number. This return number must be capable of receiving incoming transmissions from the United States, as the IRS agent will fax the approved document back to you. Follow this exact sequence to transmit your application:

• Prepare a Professional Cover Sheet: The cover sheet is the first page of your transmission. It must contain clear routing instructions for the IRS agent. Address the cover sheet to: **Internal Revenue Service, Attn: EIN Operation, Cincinnati, OH**. Include your company name, the name of the responsible party, your return fax number (clearly formatted with the country code, e.g., +1 for the US, +44 for the UK), and the total page count of the transmission (typically 2 pages: 1 cover page and 1 page of Form SS-4).
• Format the Return Fax Number: In your cover sheet and on the Form SS-4 (bottom right), write your return fax number clearly. If using a digital fax service, verify that your number is active and configured to receive international faxes. We recommend writing: "PLEASE FAX RETURN TO: +1-XXX-XXX-XXXX (Digital Fax Inbox)" to guide the agent.
• Monitor Transmission Status: Transmit the cover sheet and Form SS-4 to +1-304-707-9471. Once sent, check your digital fax dashboard to ensure the transmission status is marked as "Successful", "Completed", or "OK". Save the transmission report containing the timestamp, destination number, and page count as proof of submission. If the transmission fails, wait a few hours and try again, as the IRS fax lines can experience high traffic.

Setting Up VoIP to Call the IRS International Line

If you do not receive a return fax within three weeks of submission, the most effective way to retrieve your EIN is by calling the IRS International EIN Operation directly. The dedicated phone number is **+1-267-941-1099**. This is a direct, non-toll-free line located in Philadelphia, Pennsylvania. Calling this number from an international mobile phone or landline can lead to astronomical long-distance roaming charges, as hold times frequently exceed one hour. To avoid these costs, founders should establish a professional VoIP setup:

Before placing the call, purchase a VoIP subscription or add calling credits to a service like Skype, Google Voice, Zoom Phone, or Vyke. These platforms allow you to call US phone numbers for as little as $0.02 per minute, or under unlimited monthly calling plans. Configure your caller ID within the VoIP settings so that the IRS agent can see a valid callback number if the line drops. Additionally, ensure you have a quiet calling environment, as the IRS agents use voice recognition and verification systems, and any background noise can complicate the communication.

The IRS international phone line is operational from Monday through Friday, between 6:00 AM and 11:00 PM Eastern Time (ET). The call volume distribution throughout the day is highly predictable. The absolute best time to call is early in the morning, precisely at 6:00 AM ET, or late in the evening after 9:00 PM ET. During these windows, hold times are typically under fifteen minutes. Conversely, calling during midday or early afternoon (11:00 AM to 4:00 PM ET) will result in hold times of one to two hours, or you may receive a system message stating that the queue is full and the call will be disconnected.

When the call connects, you will navigate a voice menu. Select the option for "Employer Identification Numbers" or "International Application Status". Once an agent answers, state clearly: "I submitted a Form SS-4 by fax three weeks ago for my foreign-owned LLC, and I am calling to retrieve the assigned EIN." The agent will ask for your company's legal name, the state of incorporation, your virtual address, and the name of the responsible party. Once you successfully verify these details, the agent will read the EIN to you over the phone. Write it down carefully and ask the agent to mail the official CP 575 confirmation letter to your address on file.

Obtaining the EIN from the IRS is only the first step. To utilize the tax ID for commercial operations, you must verify the number with financial institutions and payment gateways. This process involves navigating database synchronization delays, providing specific verification documents, and complying with strict bank regulations. This topic may change based on state, service provider, and current regulations.

The IRS Database Synchronization Delay and Stripe Verification

A major point of confusion for digital nomads and international founders is the database delay that occurs immediately after the IRS issues an EIN. When an IRS agent assigns an EIN and stamps your Form SS-4, the number is immediately active in the local processing database. However, it takes **10 to 14 business days** for this new record to propagate from the local servers to the centralized federal IRS Master File. During this propagation window, the number is not visible to external database search engines or third-party automated validation systems.

Merchant payment processors like Stripe, PayPal Business, and Shopify Payments verify your business tax ID using automated application programming interfaces (APIs) connected to the IRS TIN Matching System. If you attempt to register your Stripe account immediately after receiving your EIN, the automated system will attempt to match your company name and EIN with the IRS Master File. Because the Master File has not yet synchronized, the API will return a matching error. This will cause Stripe to automatically flag your account, suspend payment processing, and request manual verification.

To avoid this disruption, we advise international founders to wait at least two weeks (14 business days) from the date of EIN issuance before starting setup on Stripe or other merchant gateways. If you must set up the account immediately due to operational urgency, prepare to bypass the automated verification by contacting Stripe customer support. You must upload a clean, high-resolution PDF copy of your Form CP 575 or Form 147C. A customer service representative will then manually verify the document, which can take several business days to approve.

Document Compliance: CP 575 vs. Form 147C

When verifying your business identity with financial institutions, you will be asked to provide your official IRS EIN confirmation letter. There are two primary documents that serve this purpose: Form CP 575 and Form 147C. While both are legally valid and issued by the IRS, they are generated under different circumstances and have distinct administrative profiles:

If you lose your original CP 575 letter, do not panic. You can call the IRS international line at +1-267-941-1099 and request a Form 147C. The agent will verify your identity and business details, and then transmit the Form 147C to your digital fax number within minutes. When uploading either document to banks or payment gateways, ensure you provide a high-resolution, uncropped PDF scan of the entire page. Compliance teams look for specific formatting elements, including the official IRS headers and date stamps. Cropped screenshots, low-resolution photographs, or files showing folded edges will trigger security alerts and result in immediate rejection.

Compliance Requirements for Digital Banks: Wise and Mercury

Digital-first financial platforms like Mercury and Wise Business have become the standard banking solutions for non-resident US LLCs. Unlike traditional brick-and-mortar US banks (such as Chase, Bank of America, or Wells Fargo), which require the company owners to physically visit a branch in the US with passport in hand, Mercury and Wise allow you to complete the application remotely. However, remote onboarding does not mean the compliance checks are relaxed. In fact, due to the high volume of international applications, these platforms have implemented sophisticated compliance filters. To ensure your application is approved, you must satisfy all onboarding requirements:

Your business address profile is the first element reviewed. The bank will evaluate the virtual address or PMB you provided. They look for physical street addresses that represent commercial office buildings or registered agent facilities. Avoid using addresses that are flagged as residential apartments or public parcel collection boxes, as this indicates a lack of real commercial presence. Furthermore, you must provide proof of your business's physical operations. This includes an active website that describes your services, drafts of customer contracts, invoices from vendors, or links to active online stores. If your website is password-protected or under construction, the bank compliance team will reject the application immediately.

Additionally, you must provide valid personal identification. As an international founder, you must upload a high-resolution color scan of your valid international passport. The bank will use facial recognition software to verify your identity against the passport photo. You must also upload proof of your personal physical address in your home country, such as a recent bank statement, utility bill, or government-issued registration document written in English or accompanied by a certified translation. Any mismatch between the personal name on your LLC filing, your passport, and your utility bill will lead to onboarding delays or rejection.

State-by-State Differences and Local Regulations

While the EIN is a federal tax identification number and the application process with the IRS is uniform across the country, the local state of formation introduces significant differences in corporate regulations, reporting obligations, and maintenance costs. The choice of state impacts how your EIN is utilized and what additional compliance tasks you must perform. The table below outlines the primary features of the most popular states for international founders:

Wyoming is highly favored by e-commerce businesses due to its low annual fees and strong privacy protections. Delaware remains the premier choice for startups seeking venture capital or plan to issue stock, though its annual franchise tax is higher. New Mexico offers the lowest maintenance costs because it does not charge an annual report fee, making it ideal for solopreneurs on a budget. Florida has a very active commercial market, but details of the LLC owners are published openly on the state's registry, which is a concern for founders who prioritize privacy. Ensure you align your choice of state with your business strategy and keep your EIN documentation consistent with state records.