5 EIN Application Mistakes That Delay Your Approval
Getting an EIN from the IRS is free and usually fast. But a surprising number of applications get delayed or rejected over small, avoidable errors.
Each mistake costs you days or weeks of back and forth with the IRS. Worse, some errors create duplicate records that haunt your filings later.
Here are the five mistakes that cause the most delays, and exactly how to avoid each one.
Mistake 1: Choosing the Wrong Entity Type
The application asks what type of entity you are forming, and this is where many founders go wrong. A single-member LLC is not a corporation, and a partnership is not a sole proprietorship.
Picking the wrong type does not just slow things down. It tells the IRS to expect the wrong tax returns from you, which creates mismatches when you file.
Match your selection to your actual formation documents. If you filed articles of organization for an LLC, select the LLC option and then indicate how it will be taxed. When in doubt, check your stamped state approval before you start the application.
Mistake 2: Getting the Responsible Party Wrong
Every EIN application names a responsible party, the real individual who controls the business. The IRS is strict about this definition.
The responsible party cannot be your registered agent, your accountant, or your formation service acting as a nominee. It must be a person with genuine control, usually the owner or a principal officer.
The IRS also limits EIN issuance to one per responsible party per day as an anti-fraud measure. If you are forming multiple entities, space out the applications.
Foreign founders face a special version of this mistake. If the responsible party has no SSN or ITIN, the instructions say to enter “Foreign” on line 7b of Form SS-4. Leaving it blank or entering a made up number guarantees a rejection. The official SS-4 instructions spell out exactly what goes in each field.
Mistake 3: A Legal Name That Does Not Match State Records
Your EIN application must use the exact legal name from your state formation documents. Not a DBA, not a brand name, not a close approximation.
Even small differences cause problems. “Smith Ventures LLC” and “Smith Ventures, LLC” can be treated as different names by automated systems.
Copy the name character for character from your stamped articles of organization. If the state has not approved your formation yet, wait. Applying early is itself a classic mistake, because a rejected or altered name means starting over.
Our step by step guide to getting an EIN for your LLC covers the right order of operations.
Mistake 4: Applying Twice for the Same Business
This is the most damaging mistake on the list. If your first application seems stuck, the temptation is to submit another one and hope.
Do not do it. Each approved application creates a separate EIN, and now the IRS has two numbers tied to one business. Untangling that takes far longer than waiting out the original delay.
If you applied by fax or mail, give it the full processing time before following up. Fax takes about four business days, mail takes four to six weeks. For the full breakdown by method, see how long it takes to get an EIN.
If the online session times out, the IRS may still have created the EIN. Call the Business and Specialty Tax Line to check before submitting again. When in doubt, verify before you reapply; a duplicate EIN is much harder to fix than a slow application.
Mistake 5: Typos in Addresses and Dates
It sounds trivial, but transposed digits in an address or a wrong formation date are among the most common reasons faxed and mailed applications bounce back.
The IRS matches your application against state records. If the formation date you enter does not match what the state has, the application gets flagged.
Type the form rather than handwriting it when possible. Illegible handwriting on a faxed SS-4 is a rejection waiting to happen.
Double check the responsible party’s address too. The confirmation letter goes to the address on the application, and a typo there means your CP 575 goes to the wrong place.
What to Do If Your Application Is Rejected
First, read the rejection notice carefully. The IRS usually states the specific problem, and most are fixable in a single corrected submission.
Fix the actual error rather than changing unrelated fields. Shotgun corrections introduce new inconsistencies.
If the notice is unclear, call the IRS Business and Specialty Tax Line at 800-829-4933. An assistor can explain what went wrong and what the corrected application needs.
The IRS EIN application page also lists which methods are available to you based on your situation, so you can pick the fastest valid channel for your resubmission.
Online Versus Fax Versus Mail: Which Forgives Mistakes
Not all application channels handle errors equally. The online assistant validates as you go, catching missing fields before submission. That makes it the most forgiving option.
Fax gives you no validation at all. Whatever you send is what gets processed, and illegible handwriting or a missing field means a rejection notice days later.
Mail is the slowest to correct. An error discovered after a mailed application means another full four to six week cycle.
The practical takeaway: if you are eligible for the online application, use it. The built in checks prevent most of the mistakes on this list automatically.
A Pre-Submission Checklist
Run through this list before you submit, regardless of channel. Two minutes here saves weeks later.
First, confirm your state formation is approved and copy the legal name exactly from the stamped documents. Second, verify the entity type selection matches those documents.
Third, confirm the responsible party is a real individual with control over the business, and that the SSN, ITIN, EIN, or “Foreign” entry on line 7b is correct. Fourth, double check the business address and formation date against state records.
Fifth, if you are a single-member LLC, be clear about your tax classification choice. Our guide on EINs for single-member LLCs explains how the disregarded entity default interacts with the application.
Finally, save or print the confirmation the moment you receive it. The number is permanent, but the letter proving it is surprisingly easy to lose.
Watch out for online session timeouts. The IRS application must be completed in one sitting, and an expired session can lose your progress. Gather every document before you click Begin Application, and do not walk away mid session.
If you use a formation service to apply, confirm exactly what name and address they submitted. Errors made by third parties are still your problem to fix, and you will need their submission details to correct them.
One last habit separates smooth applications from painful ones: apply during IRS operating hours even for fax submissions when possible. Applications received during business hours enter the queue faster than those sitting over a weekend.
Watch: EIN Errors Explained
Frequently Asked Questions
How do I know if my EIN application was rejected?
Online rejections appear immediately at the end of the session. Fax and mail rejections arrive as a notice explaining the problem, usually within the normal processing window for that method.
Can I fix a mistake after the EIN is issued?
Minor errors like an address typo can be corrected with Form 8822-B. But the core facts of the entity, like its legal name and type, should have been right from the start. Serious errors may require IRS assistance to correct.
What happens if I accidentally got two EINs?
Contact the IRS to determine which number to keep and how to retire the duplicate. Do not simply pick one and ignore the other, because filings under the wrong number create mismatches.
Does the IRS charge to fix an EIN application mistake?
No. Corrections are free. Anyone charging you a government fee to fix an EIN error is charging for their own service, not an IRS fee.
Can a rejected application affect my business credit?
A rejection alone does not. But operating without the EIN you need can delay bank accounts and vendor setups, which is why getting the application right the first time matters.
