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📘 How-To Guides Updated 29 Oct 2025 · 13 min read · By FilingFox Editorial Team

EIN Reference Numbers 101-115: How to Resolve IRS EIN Errors Effectively

Learn how to resolve common EIN reference number errors (101-115) with expert tips on fixing IRS EIN application…

EIN Reference Numbers 101-115: How to Resolve IRS EIN Errors Effectively

Key Takeaways

Grasping the meaning behind IRS EIN reference numbers 101 to 115 is crucial for addressing and overcoming common errors encountered during the EIN application process. While many resources merely list these codes, a more detailed understanding reveals how the IRS directs and handles each issue, enabling clearer guidance and encouraging proactive support. The following key points will help you navigate and resolve EIN application errors more effectively.

  1. Identify the most common EIN reference errors: Each code, ranging from 101 (name conflict) to 115 (deceased Responsible Party), indicates specific issues with the application, allowing for precise troubleshooting tailored to the problem.
  2. Comprehend IRS operational procedures: Some errors, like 101 and 115, are routed to customer service representatives, while others trigger automated instructions. This highlights the significance of proper authentication and appropriate follow-up approaches.
  3. Utilize manual review options: Many errors necessitate submitting Form SS-4 via mail or fax, emphasizing the need to recognize when online applications are insufficient and how to prepare documents correctly for manual review.
  4. Recognize technical limitations and timing: Certain errors, such as 109 to 113, tend to be system-related and are commonly resolved by waiting 24 hours before retrying, an essential tactic to reduce frustration during periods of heavy IRS system activity.
  5. Understand sensitive data complexities: Errors like 102 (discrepancies in SSN/ITIN) or 115 (deceased Responsible Party) involve personal information and may require additional verification or documentation, underscoring the importance of complete and accurate data submission.
  6. Adopt strategic communication methods: For unlisted or uncommon errors, proactively contacting the IRS at 800-829-4933 and following detailed authentication protocols improves resolution chances, especially for complex codes such as 115.
  7. Emphasize the role of proper documentation: Including relevant evidence like Articles of Organization for LLCs or death certificates expedites manual reviews and minimizes delays in receiving your EIN.
  8. Stay updated on official protocols: Familiarity with the IRS’s internal processes for error routing and authentication gives applicants an advantage when navigating obstacles during application processing.

By mastering these reference numbers and associated remedies, applicants can tackle EIN application challenges with greater confidence, cut down processing delays, and maintain compliance. The sections that follow will detail each error code and offer comprehensive, step-by-step strategies to resolve them smoothly and efficiently.

Introduction

Applying for an Employer Identification Number (EIN) often involves navigating a complex array of codes and requirements, which can be confusing especially when unexpected reference numbers appear. Each IRS EIN reference number from 101 to 115 corresponds to particular issues with your application. Understanding these codes provides an advantage, making it much easier to resolve problems quickly and effectively.

Decoding common EIN errors equips applicants with knowledge to handle interruptions—whether caused by name conflicts, system glitches, or data discrepancies. Understanding the IRS’s procedures for routing and managing these issues empowers you to proactively respond, whether that means reapplying online, submitting manual forms like Form SS-4 through services such as FilingFox, or contacting the IRS directly. Ultimately, this knowledge helps you secure your EIN promptly so your business can continue operating without unnecessary delays.

In this guide, we’ll examine what each EIN reference number signifies, the reasons behind errors, and practical steps for resolving them to keep your EIN application on track.

Understanding IRS EIN Reference Numbers 101-115

The IRS assigns EIN reference numbers between 101 and 115 as internal identifiers for specific issues or statuses related to EIN applications. These codes are critical for how the IRS routes, authenticates, and processes EIN requests, particularly when applications face errors. Understanding the meaning of each reference number helps applicants, business owners, and professionals quickly identify the nature of the problem and apply the most appropriate solution.

Broadly, these errors fall into two main categories:

  • Systemic Errors: These arise from the IRS’s internal system checks, such as duplicate EIN requests, system technical difficulties, or discrepancies with existing taxpayer records.
  • Application-Specific Errors: These result from incomplete or inaccurate information submitted on Form SS-4, mismatches in data, or inconsistencies in provided documentation.

For instance, EIN reference number 101 often signals a duplicate EIN request or an automatic rejection due to a previously issued identification number. Meanwhile, references like 113 and 115 typically involve more complex cases requiring manual review, additional documentation, or direct IRS intervention.

Knowing the difference between these errors guides applicants toward effective solutions—ranging from online resubmission and faxing corrected forms, to direct contact with the IRS. This foundational understanding prepares you to navigate each specific error code with confidence and accuracy.

Next, we’ll explore the meaning, causes, and remedies for each EIN reference number from 101 to 115.

Decoding Common EIN Reference Errors and Their Solutions (101-115)

EIN Reference Number 101

Cause: The IRS flagged a duplicate EIN request linked to the same entity, resulting in automatic rejection to avoid multiple EIN assignments.

Resolution: If you need a new EIN—for example, for a subsidiary or newly formed entity—wait at least 24 hours before reapplying. Ensure that all information matches IRS records precisely to prevent rejection. For complex situations or suspected system errors, complete Form SS-4 and fax it with a cover letter explaining your case to 855-641-6935. You may also contact the IRS Business & Specialty Tax Line at 800-829-4933 for a manual review after verifying your identity.

EIN Reference Number 102

Cause: Discrepancies between entity names or addresses in your application compared to IRS records, especially when names vary across states or subsidiaries.

Steps to Fix: Verify entity names and mailing addresses exactly as registered with the relevant state authorities. If needed, submit a corrected Form SS-4 and allow at least 24 hours before resubmitting online. Persistent errors require sending a physical copy of the corrected SS-4 via fax to 855-641-6935, along with supporting documents such as Articles of Organization and explanations for the correction.

EIN Reference Number 103

Cause: Missing or incomplete information on critical fields of the SS-4 form, such as name control or responsible party details.

Solution: Carefully review your application for blanks or errors. Correct and resubmit the application online, or fax a complete Form SS-4 to the IRS. Using guided application services like FilingFox can help minimize human errors by ensuring thoroughness and accuracy.

EIN Reference Number 104

Cause: System interruptions during submission, often caused by internet connectivity issues or browser incompatibilities.

Resolution: Wait one full business day before attempting to resubmit online. For urgent EIN applications, consider faxing the Form SS-4 and confirming receipt with IRS support.

EIN Reference Number 105

Cause: Conflicts in responsible party information, frequently arising from SSNs errors or recent ownership changes.

How to Address: Double-check all responsible party names and Social Security Numbers for accuracy. Submit corrected information with Form SS-4 and include supporting documents as needed. Contact IRS assistance at 800-829-4933 for further clarification when necessary.

EIN Reference Number 106

Cause: Employer type was incorrectly entered or omitted, affecting entity structure classification.

Correction Steps: Ensure accurate selection of entity type (such as LLC, corporation, partnership) on the application. Submit corrected Form SS-4 promptly to avoid delays.

EIN Reference Number 107

Cause: Attempting to request an EIN for a nonprofit or trust that already has an assigned EIN.

Resolution: Contact the IRS Business & Specialty Tax Line to verify existing EINs connected to your entity. Follow IRS guidance on obtaining a new EIN if applicable, after proper identity verification.

EIN Reference Number 108

Cause: Submission method conflicts; for certain entity types like trusts or estates, online filing is not accepted.

Solution: Check IRS instructions carefully. Entities requiring manual submission must send Form SS-4 by fax or mail. Adhering to proper filing procedures prevents delays and rejection errors.

EIN Reference Number 109

Cause: Missing or invalid third-party designee details on the application form.

Action: Update your application to include valid designee information, or omit this section if not applicable. Guided services such as FilingFox can assist in completing these fields correctly.

EIN Reference Number 110

Cause: Duplicate submissions detected within a short time span from the same applicant.

Resolution: Wait at least 24 hours before resubmitting online to avoid automatic rejections. For urgent cases, contact IRS representatives for manual processing instructions.

EIN Reference Number 111

Cause: Errors in tax classification selection, such as applying multiple or incorrect entity types.

Fix: Review and correct tax classification sections on Form SS-4. Consulting IRS guidelines or professional application services can clarify proper selections.

EIN Reference Number 112

Cause: Detected change in ownership without accompanying documentation.

How to Resolve: Provide supporting items indicating ownership changes, such as amended Articles of Organization or partnership agreements, submitted alongside Form SS-4.

EIN Reference Number 113

Cause: Complex or unique cases require manual IRS review, often involving documents like death certificates, court orders, or trust agreements.

Solution: Gather all requested documents and call the IRS Business & Specialty Tax Line at 800-829-4933. The authentication process is thorough to ensure authorized issuance of EINs.

EIN Reference Number 114

Cause: Incorrect or conflicting bank routing details when applying for EIN connected with financial and banking setup.

Resolution: Confirm accuracy of all banking information before submitting your EIN application. When needed, submit via fax with explanations to allow manual IRS processing.

EIN Reference Number 115

Cause: Requires IRS customer service intervention due to unusual or complex EIN application errors, such as deceased Responsible Party issues.

Recommended Action: Contact the IRS Business & Specialty Tax Line at 800-829-4933 promptly. Prepare all pertinent application documents and legal proofs, such as death certificates or Articles of Organization, for authentication during your call. This process ensures legitimate EIN assignment.

These detailed descriptions and remedies equip applicants with practical guidance for resolving EIN errors numbered 101 through 115 efficiently, by recognizing each problem’s nature and choosing the best method of submission or communication with the IRS.

Understanding IRS Routing & Authentication Procedures

Each EIN reference number triggers a specific IRS routing and authentication process designed to protect taxpayer security and prevent fraudulent activity.

When errors like 101 or 115 are detected, the IRS follows layered procedures. Straightforward issues may be automatically resolved or addressed through system-generated notifications, while more complicated cases are escalated to specialized IRS agents for thorough review and manual authentication.

This process often requires applicants to provide official documentation such as Articles of Organization, trust agreements, or death certificates. These measures prevent unlawful EIN requests and maintain the integrity of the tax system. Failure to submit required documents may result in extended processing times or outright denial.

Understanding these behind-the-scenes processes can ease frustrations caused by lengthy IRS calls or rigorous verification steps. Furthermore, it clarifies why professional services like FilingFox are valued—they anticipate authentication demands and prepare applicants accordingly, smoothing the path toward EIN approval.

Next, we’ll explore proactive steps applicants can take to avoid common errors and accelerate successful EIN processing.

Proactive Strategies for Resolving EIN Errors

Preventing errors in the EIN application process is as important as knowing how to fix them. The following strategies can significantly reduce the likelihood of encountering EIN reference number issues:

  1. Use accurate and consistent information: Always ensure entity names, structures, and addresses match those registered with state agencies. Address inconsistencies cause many errors, including 102 and 105.
  2. Prepare complete and correct forms: Carefully review IRS instructions for Form SS-4. Omissions or errors often lead to reference numbers 103 and 109. Tools like FilingFox provide guided workflows that catch mistakes before submission.
  3. Submit applications via fax or mail when required: Some entities—such as trusts, estates, and certain nonprofits—must file manually. Ignoring this can lead to errors like 108 and 113.
  4. Wait before resubmitting: Allow at least 24 hours between attempts after an error to avoid auto-rejection triggers (applicable for errors 101 and 110).
  5. Maintain documentation readiness: Keep key legal documents on hand to respond quickly to IRS requests for verification during manual reviews.
  6. Seek professional support: Leveraging expert services can minimize errors, streamline the application process, and provide specialized assistance for complex cases.

Applying these practices helps avoid repeated setbacks, reduces IRS processing time, and brings applicants closer to obtaining their EIN efficiently.

Additional Tips & Best Practices

To further enhance the EIN application experience, consider these extra recommendations:

  • Track your application status: Keep records of submission confirmations, whether filing online, by fax, or mail. These proofs are valuable when engaging with the IRS during follow-up.
  • Use the correct IRS fax number: Always send Form SS-4 to 855-641-6935. Using incorrect numbers can delay processing and generate additional errors.
  • Contact the IRS early for unusual errors: For reference numbers outside the common 101-115 range, an early phone call to 800-829-4933 can clarify special handling requirements.
  • Document all communications: Keep detailed notes of IRS call dates, representatives spoken with, and outcomes to support any needed escalations or future inquiries.
  • Stay current on IRS updates: EIN policies and processes change over time. Monitoring IRS guidance prevents the use of outdated procedures that can cause preventable errors.

If you encounter rare or newly emerging EIN reference errors, sharing your experience through online forums or comments helps build collective knowledge and supports others navigating similar issues.

Mastering the meanings of IRS EIN reference numbers and applying targeted solutions leads to a more straightforward, less stressful EIN application experience, benefiting a wide range of individuals and organizations.

Conclusion

Understanding IRS EIN reference numbers 101 through 115 is vital for effectively addressing common issues in EIN applications. By identifying the specific causes—such as duplicate requests, data inconsistencies, or authentication requirements—applicants can choose the most appropriate solutions, whether correcting information online, submitting forms by fax, or engaging directly with IRS representatives. These reference numbers mirror the IRS’s comprehensive verification process aimed at safeguarding taxpayer identity and ensuring accurate EIN issuance.

Adopting proactive measures like consistent data entry, thorough form completion, and readiness with supporting documents reduces processing delays and error occurrences. Staying informed about IRS procedures and leveraging expert assistance not only enhances efficiency but also helps applicants navigate complex cases smoothly.

Looking ahead, success in EIN applications will increasingly depend on understanding procedural details and preparing to meet verification demands promptly. Businesses and individuals who integrate this knowledge into their workflows will secure their EINs more rapidly and maintain compliance more effectively, positioning themselves for sustained operational growth and stability.

FAQs on IRS EIN Reference Numbers 101-115

How can understanding IRS EIN reference numbers help expedite resolving application errors?

Recognizing specific codes, such as 101 or 113, allows applicants to quickly determine whether the issue is systemic or related to submission details. This insight directs them to the proper steps—be it online resubmission, form correction via fax, or contacting IRS support—thereby reducing processing delays.

Why do some EIN errors require manual review, and how should applicants prepare?

Errors like reference numbers 113 and 115 often indicate complex applications that necessitate verification through official documents (e.g., Articles of Organization or court orders). Preparing these materials in advance and contacting IRS support ensures smoother and faster resolution.

What proactive steps can small businesses take to minimize EIN application errors related to reference numbers?

Maintaining consistent and accurate entity information, carefully reviewing IRS application instructions, using guided services such as FilingFox, and allowing a 24-hour gap after errors before resubmitting can greatly decrease filing mistakes. Keeping documentation organized for prompt verification is also crucial.

How do IRS routing and authentication procedures influence the resolution of EIN reference number errors?

The IRS routes simpler errors for automated handling while escalating more intricate cases to representatives for manual authentication. This process ensures security and accuracy but requires that applicants submit complete, precise applications to avoid delays.

When should applicants consider contacting the IRS directly regarding EIN reference number issues?

If standard troubleshooting does not resolve persistent errors or when confronted with complex references like 104 or 115, contacting the IRS Business & Specialty Tax Line promptly provides access to expert guidance. Being prepared with necessary documentation accelerates assistance.

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