How to Get an Oklahoma EIN Number (for Free) for an LLC - 2025 Guide

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We know dealing with the IRS can be intimidating, but getting an EIN for your LLC doesn’t have to be scary.

This page explains what an EIN is and we provide step-by-step instructions on getting an EIN for free for an Oklahoma LLC.

What is an EIN Number?

EIN Number for an LLC

EIN stands for Employer Identification Number and is assigned to your LLC by the Internal Revenue Service (IRS), a division within the federal government.

The EIN identifies your business to the IRS, the same way a Social Security Number identifies a person. You could also think of the EIN as your “account number” with the IRS.

Note: An EIN is not issued by the Oklahoma Secretary of State. It is only issued by the IRS.

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Have an LLC, but no EIN? Hire Northwest to get your EIN:
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EIN Synonyms

You might see your EIN Number referred to in many different ways. They all mean the same thing, though.

Other terms for an EIN include:

  • EIN Number
  • Employer Identification Number
  • Federal Employer Identification Number (FEIN)
  • Federal Tax ID Numbers
  • Oklahoma Federal Tax ID Number
  • Federal Tax Identification Number

Note: An EIN Number is not the same thing as an Oklahoma state Tax ID Number. An EIN is issued by the IRS. And an Oklahoma Tax ID Number is issued by the Oklahoma Tax Commission.

What’s an EIN used for?

An Employer Identification Number (EIN) is used by several different government agencies to identify your LLC.

Having an EIN for your Oklahoma Limited Liability Company lets you:

  • Open an LLC bank account
  • File federal, state, and local tax returns
  • File Oklahoma income tax
  • Register for sales taxes
  • Obtain business lines of credit or business loans
  • Get a business credit card for your LLC
  • Apply for business licenses or permits
  • Handle employee payroll taxes (if applicable)
  • Register with the Oklahoma employment security commission (if applicable)

How much does it cost to get an EIN?

Applying for an EIN for your Oklahoma LLC is completely free. The IRS doesn’t charge any service fees for the EIN online application.

When should you get an EIN?

Don’t apply for an EIN until your Oklahoma LLC is approved.

Tip: If you applied for an EIN before your LLC is approved, or made another mistake, please see our FAQs below. We explain how to fix the most common EIN mistakes.

How do I file an EIN Application for my Oklahoma LLC?

Important: Make sure you finalize how many LLC Members you have before you apply for an EIN. Changing from a Single-Member LLC to a Multi-Member LLC (or vice versa) requires filing paperwork with the IRS and the state. Additionally, you’ll need to transfer LLC ownership, amend your Operating Agreement, and update your accountant (since your tax filing will change).

Note: An LLC doesn’t stand for Limited Liability Corporation. It stands for Limited Liability Company.

Apply for an EIN (US Citizens and US Residents)

We recommend applying for an EIN online if you have a SSN (Social Security Number) or ITIN (Individual Taxpayer Identification Number).

This is the easiest filing method and it has the fastest approval time. Your EIN Number will be issued at the end of the online application, which takes about 15 minutes to complete.

We have step-by-step instructions on this page:

How to apply for an EIN online

Note: You can also apply for an EIN by mail or fax, but this is really slow compared to the online filing. We only recommend this if you get an error message (called an EIN reference number) and the IRS says that you have to.

Apply for an EIN (Non-US residents)

If you’re a non-US resident (and don’t have an SSN or ITIN), you can still get an EIN for your Oklahoma LLC. You just can’t apply for a Federal tax EIN online.

Instead, you need to mail or fax Form SS-4 to the IRS. The SS-4 is the application form. We have step-by-step instructions on this page:

How to get an EIN without an SSN or ITIN

Note: If you’ve read somewhere that you have to hire a third party designee, this is not true. You can obtain your EIN yourself without using a third party designee.

EIN Approval (EIN Confirmation Letter)

Once the IRS issues an EIN for your Oklahoma LLC, you will receive your official approval, known as an EIN Confirmation Letter (CP 575).

The method you use to apply for an EIN will determine how you receive your EIN Confirmation Letter. If you apply online, you can download the EIN Confirmation Letter at the end. If you mail or fax SS-4, the IRS mails your EIN Confirmation Letter.

Here is what the EIN Confirmation Letter looks like:

EIN Confirmation Letter (CP 575) for LLC

LLC Business Bank Account

After getting an EIN, you can open a business bank account for your Oklahoma LLC. The bank will need your EIN Confirmation Letter (or EIN Verification Letter) to open the account.

Please see business bank account for LLC for a list of recommended banks (and the documents you should bring).

If you’re a non-US resident, you can still open a US bank account for your LLC. Please see this page: Non-US resident opening US bank account for an LLC

Internal Revenue Service (IRS) Contact Information

If you have any questions, you can call the Internal Revenue Service (IRS) at 1-800-829-4933. Their office hours are 7am – 7pm, Monday through Friday.

Use these options to speak to a live person:

  • Press option 1 for English.
  • Then press option 1 for Employer Identification Numbers.
  • Then press option 3 for “If you already have an EIN, but you can’t remember it, etc.”

Note: Pressing option 3 is the only way to get a live person.

We recommend calling the IRS right after they open to avoid long hold times.

The IRS won’t give you legal assistance or guidance, legal or tax advice, but they will answer questions about the EIN application process.

EIN Frequently Asked Questions

Common EIN mistakes and how to fix them

Matt Horwitz
Matt Horwitz
Matt Horwitz is the leading expert on LLC education, and has been teaching for 15 years. He founded LLC University in 2010 after realizing people needed simple and actionable instructions to start an LLC. He's cited by Entrepreneur Magazine, Yahoo Finance, and the US Chamber of Commerce, and was featured by CNBC and InventRight.
 
Matt holds a Bachelor's Degree in business from Drexel University with a concentration in business law. He performs extensive research and analysis to convert state laws into simple instructions anyone can follow to form their LLC - all for free! Read more about Matt Horwitz and LLC University.

4 comments on “Oklahoma Federal Tax ID Number (EIN)”

Disclaimer: Nothing on this page shall be interpreted as legal or tax advice. Rules and regulations vary by location. They also change over time and are specific to your situation. Furthermore, this comment section is provided so people can share their thoughts and experience. Please consult a licensed professional if you have legal or tax questions.

  1. I formed an llc with my husband and we are going to both be equally active in running the business . In Oklahoma can we get an ein and be considered a joint venture?

    Reply
    • Hi Cayce, we have a full article on that here: husband and wife qualified joint venture. However, Oklahoma isn’t a community property state, so it won’t apply. You can certainly still get an EIN for your LLC though. Your LLC will just be taxed as a Partnership instead of a Sole Proprietorship (as in a qualified joint venture). Hope that helps.

      Reply
  2. Your LLC site is absolutely great! It would have taken me ages to figure out all this stuff myself! Can’t thank you enough!!

    Reply
    • Hey Glenn, thanks for the kind words! We’re very happy to hear that :) Best wishes with your business!

      Reply

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