How to Get an EIN for a Colorado LLC

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What is an EIN Number?

An EIN Number stands for Employer Identification Number and it will be issued by the IRS to your Colorado LLC.

An EIN is to your Colorado LLC what a Social Security Number is to a person. It helps the IRS identify your business for tax and filing purposes.

Having an EIN for your Colorado LLC allows you to open a separate bank account under the LLC’s name, apply for certain licenses and permits, and handle employee payroll (if applicable).

Even though it’s called an Employer Identification Number, it doesn’t mean that you have to have employees. The EIN is just a type of Taxpayer Identification Number (TIN) that identifies your Colorado LLC with the IRS.

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EIN Synonyms

Your Colorado LLC’s EIN may be called different names. They all mean the same thing though.

Similar terms for an EIN include:

  • EIN Number
  • Employer ID Number
  • Employer Identification Number
  • Federal Employer ID Number
  • Federal Employer Identification Number
  • FEIN
  • Federal Tax Number
  • Federal Tax ID Number
  • Federal Tax Identification Number

Benefits of having an EIN for your Colorado LLC

Having an EIN for your Colorado LLC enables you to do the following:

  • Open an LLC business bank account
  • File taxes at the federal, state, and local level
  • Handle employee payroll (if applicable)
  • Obtain business lines of credit or business loans
  • Get a business credit card for your LLC
  • Apply for business licenses

Wait for your Colorado LLC to be approved

Wait for your Colorado LLC to be approved by the Secretary of State before applying for your EIN. Otherwise, if your LLC filing is rejected, you’ll have an EIN attached to a non-existent LLC.

However, if this does happen, you can always cancel your EIN and then apply for a new one. And you don’t have to wait for your cancellation to go through before applying for a new EIN.

Applying for an EIN for your LLC is free ($0)

Applying for an EIN for your Colorado LLC is completely free.

The IRS doesn’t charge anything for applying for an EIN.

Don’t have an SSN or ITIN?

If you’re a foreigner who formed a Colorado LLC, you can still get an EIN without having an SSN or ITIN.

You just can’t get your EIN online. Instead, you need to mail or fax Form SS-4 to the IRS.

We have instructions here: How to apply for EIN without an SSN or ITIN.

EIN Phone Application

You may have read that you can apply for an EIN by phone. This is no longer the case. The IRS has discontinued this service.

The only businesses that can get an EIN by phone are Exempt Organizations (like non-profits) and Foreign Companies (companies formed outside of the United States).

If you’re a foreigner and you formed an LLC in Colorado, we have instructions below on how to apply for your EIN.

EIN Responsible Party

The EIN Responsible Party is a person that goes on file with the IRS when you apply for an EIN for your Colorado LLC.

Think of the Responsible Party as the LLC’s “contact person”. The IRS will send your LLC’s mail and correspondence to this person.

If you have a Single-Member Colorado LLC:

Then you will be the EIN Responsible Party.

If you have a Multi-Member Colorado LLC:

One of the LLC Members will be the EIN Responsible Party.

The IRS just wants one person as the EIN Responsible Party. They don’t want all the Colorado LLC Members’ information. The IRS gets the other Members’ information when you file your 1065 Partnership return and issue K-1s each year.

Although any LLC Member can be listed, you should list the LLC Member that will take on the responsibility of making sure the LLC’s taxes are handled properly.

If your Colorado LLC is owned by another company:

The IRS made changes in 2018 that no longer allow an EIN Responsible Party to be a company. The EIN Responsible Party must be an individual person. So it’s best to list one of the individual owners of the parent company.

Note: If you have a Colorado LLC that is owned by another company and you try to get an EIN online, you’ll just get an error message (EIN reference number) at the end of the application.

Learn more:

To learn more about who can be the EIN Responsible Party for your Colorado LLC, please see EIN Responsible Party for LLC.

How is a Colorado LLC taxed?

By default, a Colorado LLC is taxed based on the number of Members (owners).

Meaning, an LLC is just taxed in the default status set by the IRS and the LLC doesn’t elect to be taxed as a Corporation (either a C-Corporation or an S-Corporation).

The default tax status for a Colorado Single-Member LLC is a Disregarded Entity, meaning if the LLC is owned by an individual, the LLC is taxed like a Sole Proprietorship. If the LLC is owned by a company, it is taxed as a branch/division of the parent company.

The default tax status for a Colorado Multi-Member LLC is Partnership, meaning the IRS taxes the LLC like a Partnership.

If instead, you want your Colorado LLC taxed as a C-Corp, you’ll first apply for an EIN and then later file Form 8832. If you want your LLC taxed as an S-Corp, you’ll first apply for an EIN and then later file Form 2553.

If you choose to have your Colorado LLC taxed as a Corporation, make sure you speak with an accountant as there are a lot of details you need to consider. Having an LLC taxed as an S-Corporation is a much more popular choice than having an LLC taxed as a C-Corporation. S-Corporation taxation usually makes sense once an LLC generates about $70,000 in net income per year.

How to apply for an EIN for your Colorado LLC

Below you will find 3 different sets of instructions:

1. If you have an SSN or ITIN, use the EIN online application

We recommend applying for an EIN online for your Colorado LLC if you have an SSN or ITIN.

This is the easiest filing method and it has the fastest approval time.

We have instructions here:
How to apply for an EIN online

2. If you apply online, but you get an error message

If you have an SSN or ITIN, apply for an EIN online, but you get an error message (called an EIN reference number) at the end, you will need to mail or fax Form SS-4 to the IRS instead.

We have instructions here:
Apply for EIN for LLC with Form SS-4

3. If you don’t have an SSN or ITIN

If you don’t have an SSN or ITIN, you can still get an EIN for your Colorado LLC. You just can’t apply for an EIN online.

You will need to mail or fax Form SS-4 to the IRS instead and you must fill the form out in a certain way.

We have instructions here:
How to get an EIN without an SSN or ITIN

EIN Confirmation Letter (EIN Approval)

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

The method you used to apply for an EIN will determine how you receive your EIN Confirmation Letter.

If you applied for an EIN online:
You’ll be able to download a PDF copy of your EIN Confirmation Letter at the end of the online application. There is no waiting time. The IRS will also send you a duplicate copy in the mail in about 4 to 5 weeks.

If you sent Form SS-4 by fax:
The IRS will fax you back your EIN Confirmation Letter within 4 to 7 business days.

If you sent Form SS-4 by mail:
The IRS will mail your EIN Confirmation Letter within 4 to 8 weeks.

Here is what the EIN Confirmation Letter for an LLC looks like:

EIN Confirmation Letter (CP 575) for LLC

How to Cancel an EIN?

If there was a mistake with your first EIN application or you need to cancel your EIN Number for any reason, you just need to mail a cancellation letter to the IRS.

We have instructions here: How to cancel an EIN.

You don’t have to wait for your EIN cancellation to be finalized before getting a new EIN for your Colorado LLC.

LLC Business Bank Account

After getting your EIN, you can then open a separate business bank account for your Colorado LLC.

Banks usually ask for the following documents to open a Colorado LLC business bank account:

  • EIN Confirmation Letter
  • LLC Approval (stamped and approved Articles of Organization)
  • LLC Operating Agreement
  • Driver’s License and/or Passport

Aside from the above, banks may also require other paperwork (like proof of address), so we recommend calling a few banks in Colorado ahead of time before visiting them in person. It’s also a good idea to ask if they have monthly fees on their “basic” business checking accounts since there are a number of banks that don’t have any monthly fees.

If you’re a non-US resident (foreigner), you will need to show 2 forms of identification, such as your foreign passport and your foreign driver’s license. There are additional things to keep in mind when opening a U.S. bank account for your Colorado LLC that we have listed here: Non-US resident opening U.S. bank account for an LLC

Note: You will need to open a bank account in Colorado since that is where you formed your LLC.

IRS Contact Information

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

We recommend that you call the IRS early to avoid long holding times.

Next Step

Once the IRS has issued an EIN for your Colorado LLC, you can then proceed to the next lesson: Colorado LLC Periodic Report.

Matt Horwitz

Matt Horwitz
Founder & Educator, LLC University®
Matt Horwitz has been the leading expert on LLC education for the past decade. He founded LLC University in 2010 after realizing people needed simple and actionable instructions to start an LLC that other companies weren't offering. 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.

23 comments on “Colorado 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. Can you explain why a single member llc that is filing as a sole proprietorship would need/want an EIN?

    • Hi Rachel, the most common reasons are to open an LLC checking account (details) and for privacy of your SSN (in some cases). As a single-member LLC taxed as a Sole Proprietorship you don’t have to obtain an EIN though, so you can skip it for now if you’d like… plus, you can always get one later if you decide you need it. Hope that helps.

      • Thanks, Matt. This is helpful. One last question, would having or not having an EIN change how I do my taxes for my LLC?

        • Hi Rachel, apologies for the slow reply. Nope, whether or not you have an EIN does not affect how your taxes will be filed as a single-member LLC taxed as a Sole Proprietorship. Hope that helps!

  2. When I was registering for the EIN number I couldn’t Use “.” on my Legal name of LLC. for example “A.B.C. Management LLC.” I had to enter ABC Management LLC” would that affect my regeneration?

    • Hi Elena, no, that will not affect your registration at all. The IRS strips out nearly all punctuation. You’re all good :)

      • When I register for my EIN, I entered my start date in today’s date, would that be correct? 1/2/2018? I already submitted this application and now i’m wondering if that is the actual date i’m suppose to put on or will it be the date when the LLC is created? The LLC was created 12/28/2017.

        • Hi Elena, it’s supposed to match up with the date the business actually started, which in your case sounds like 12/28/2017. However, I don’t think it’s a huge deal. Having said that, I’m not 100% certain though. If you want to cross your t’s and dot your i’s, you can cancel the EIN, then create another one. Hope that helps.

  3. hello i have one question about creating EIN. best option to what kind i work i do, i see on construction industrial and my company will be like install new tub, tile , paint interior and exterior any kind of Maintenance for the apartment community
    the option only are construction and repairs?

    • Hi Alberto, the information provided to the IRS does not have to be highly specific. Although the options are broad and sometimes generic, you can just choose the one that is most closely related to your work. Hope that helps.

  4. Do I need ein if I’m just providing service i.e., haircut, or applying eyelash extensions? I won’t be selling any tangible items, just providing a service?

    • Hi Jl, did you form an LLC? If so, and your LLC is a Single-Member LLC, and you don’t have employees, and you don’t take payroll, and you don’t owe federal excise taxes, then you can operate a Single-Member LLC with just your SSN. Some banks may want to see an EIN though, even though you can technically operate a Single-Member LLC with an SSN. However, why don’t you want an EIN? It just takes 5 min. to get online. Just curious. Thanks.

  5. Hi Matt, thanks so much for your help, I wish I had found this site at the beginning of my research. It would have saved me so much time. I obtained a personal EIN a couple years ago which I never used. I was planning to start a business then, but didn’t. Can I use that EIN for the LLC I just registered? If not, the IRS site says that I can only obtain one EIN online so I will have to go through fax to get it. Is this correct? Thank you!

    • Hi Christie, you’re welcome. Thanks for the kind words! while you can use that prior EIN for the LLC by writing to the IRS, we recommend getting a new EIN for the newly formed LLC. It guarantees things are cleaner and that there’s no confusion. It’s actually one EIN per day online, not ever. So you just need wait 24 hours ;) Hope that helps!

  6. If I change the name of my LLC do I have to notify the IRS about the name change so I can continue using the same EIN number or do I get a new EIN number?

    • Hi Lauro, yes, you’ll need to send a letter to the IRS about the name change. The EIN will stay the same. You’ll also need to update the Colorado Department of Revenue, your bank, and any other place that has the old LLC name. Hope that helps.

  7. Thank you so much for putting this class together. It is so easy to understand and follow. This is a big gift to small businesses. Again, thank you. My question is this, I have an EIN for another business that is still currently active. I started it 10 years ago in Oregon and have since moved to Colorado. Do I need to update my address with the IRS in respect to the EIN?

    Thank you so much for your time,
    Hope you are enjoying your day

    • Hi Pamela, you’re very welcome! Thank you for the kind words :) It not so much updating the EIN, but rather the company record with the IRS. You’ll want to submit Form 8822-B to update your address for your other business. Hope that helps.

  8. Thank you very much Matt, your videos have been very helpful! I have filed my articles of organization with Colorado and I delayed my effective date to 01/01/19 per your advice as it is the end of October. I was wondering if i have to wait until 01/01/19 to file for and EIN number or can I go a head and start on that? Also I’m looking to go ahead and set up a business checking account/ credit card after getting my EIN number. I’m basically trying to get everything set up and in place by the 1st of January. Can I start moving forward on these actions?

    Thanks again,


    • Hey Stephen, you’re very welcome! In the online EIN Application with the IRS, you can enter the start date of the business as 1/2019, so yes, you can proceed with that. Just call the bank you’re thinking of going with and and ask to speak to the branch manager. If you have your approved Articles of Organization and EIN Confirmation Letter, it’s likely they’ll let you open the bank account. We have some LLC banking tips here: opening an LLC bank account. Hope that helps!

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