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101EINReject.US
IRS reference 101–115 · SS-4 escalation

EIN application rejected?
Decode the IRS error and fix the input.

The IRS online assistant returns one of 13 reference numbers when it rejects your SS-4. We map each one to a verified cause, a step-by-step fix, and the right escalation path — retry online, mail, fax, or wait.

Processed in your browser only. Pasted rejection text is never sent to our servers.

  • Sourced to IRS Pub 1635
  • Every claim links its IRS source
  • Client-side · no logging
Error code decoder
client-side · no logging
101
IRS reference number 101
Entity name conflict
File SS-4 by mail or fax4–5 weeks (mail) · 4 business days (fax)
What it actually means

The IRS detected a name conflict — another entity in the IRS database is using a name that is identical or substantially similar to the one you submitted. [1]

Most common causes
  • An existing entity (any state, any year) is registered at the IRS under a name that overlaps yours.
  • A previously dissolved entity still carries an open record.
  • Your name was approved at the state level but conflicts at the federal level — state and IRS uniqueness checks are separate.
Step-by-step fix
  1. 1Verify your state-approved entity name on your filed Articles.
  2. 2If state-unique but IRS-conflicted: file SS-4 by mail or fax — an IRS agent will review the name and may accept it with documentation, or require a name change.
  3. 3If you want a different name: amend with the state first; do not retry online with a name your state has not yet approved.
citeIRS Pub 1635cite26 CFR §301.6109-1citeForm SS-4 Inst.

Informational, not tax advice. The IRS issues all EINs — we do not. Talk to a CPA or EA →

Expectation-setting
Only the IRS issues EINs. No service — formation operator, attorney, CPA, or EIN-resolution shop — issues EINs. What they sell is the labor of refiling SS-4 on your behalf, not a different outcome.
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Reference index

All 13 IRS error codes

Every reference number the EIN assistant can return, each mapped to a verified cause and fix path.

13 / 13 mapped to Pub 1635
101Entity name conflict
An existing entity (any state, any year) is registered at the IRS under a name that overlaps yours.
File SS-4 by mail or fax
102SSN/ITIN mismatch — responsible party
Typo in the SSN/ITIN.
Retry online with corrected input
103Existing EIN — responsible party reuse limit
Same responsible party submitted a separate EIN application earlier today.
Wait — retry next business day
104Third-party designee conflict
Designee name, phone, or fax fields were left blank when designee block was started.
Retry online with corrected input
105Excessive attempts
Multiple online assistant submissions in the same session.
Wait 24 hours
108Entity name / TIN combination invalid
Existing entity record (e.g. converting sole prop to LLC) — name and TIN don't align.
File SS-4 by mail
109Technical / system error
Genuine IRS system outage (rare; usually transient).
Retry, then escalate to fax
110Technical issue with website
Browser session expired mid-application.
Retry within IRS hours
111Trust EIN — already issued
Trust EIN was previously assigned, often years ago, and may not be in the trustee's current records.
Use existing EIN — see /already-have-ein
112Estate EIN — already issued
Executor/personal representative previously obtained an EIN for the estate.
Use existing EIN
113Estate / Trust — responsible-party SSN required
Online assistant does not allow EIN-based responsible party for estates/trusts.
Retry with executor SSN
114One EIN per responsible party per day
You (as responsible party) already obtained an EIN today for another entity.
Wait — single EIN per day rule
115Responsible party deceased
Inheriting a business and listing the deceased prior owner as RP.
Update responsible party — see /custodian-vs-responsible-party

How it works

From rejection to refiled — in four steps

  • Read the reference number

    The IRS online assistant returns a three-digit reference number (101–115) when it can't issue your EIN. That number is the whole diagnosis.

  • Decode the real cause

    We map each reference number to its verified cause from IRS Pub 1635 and the Form SS-4 instructions — in plain English, not IRS shorthand.

  • Follow the fix path

    Each code resolves one of four ways: correct the input and retry online, file SS-4 by mail or fax, or wait out a timing rule. We tell you which.

  • Refile with confidence

    Pre-flight your SS-4 inputs against the same checks the assistant runs, so the next submission clears instead of bouncing again.

Expectation-setting
Only the IRS issues EINs. No service — formation operator, attorney, CPA, or EIN-resolution shop — issues EINs. What they sell is the labor of refiling SS-4 on your behalf, not a different outcome.

How we research

Every claim on this site is sourced from IRS Pub 1635, Form SS-4 instructions, or 26 CFR §301.6109-1, with each source linked so you can verify it directly. See our methodology and full citation manifest.

Questions

EIN rejection FAQ

The questions people ask right after the IRS assistant bounces their SS-4.

A rejection isn't the end of the line.

An EIN reference number is a fixable diagnosis, not a dead end. We map your code to its verified cause, the exact correction, and the right channel to refile — every step traced to IRS Pub 1635 and the SS-4 instructions. No email, no countdown timers.

Decode in under a minute

Paste the rejection. Get the fix.

Drop your IRS reference number into the decoder — or pick it from the list — and get the verified cause, the step-by-step fix, and the right channel to refile.

Informational, not tax advice. The IRS issues all EINs — we do not.