How To Get A California EIN For An LLC (Apr. 2026 Guide)

Forming your LLC in California offers several strong advantages over other states. You’ve got access to one of the largest economies in the country, giving you ample opportunities for business growth. Therefore, it should be an important focus state when securing your EIN successfully and establishing a strong foundation when building your business.

The state requires you to get an EIN when establishing your California LLC. Once issued by the Internal Revenue Service (IRS), it allows you to perform several important business functions.

I’ve detailed the essential details that you need to know before filing your EIN application in California. Read through my article, and you’ll be ready for a seamless filing process in no time at all.

What Is An EIN?

EIN stands for Employer Identification Number. It’s issued by the IRS to different business entities, including Limited Liability Companies (LLCs), as a unique 9-digit Taxpayer Identification Number (TIN). While it’s not always required, it’s worthwhile getting it if you want to grow your business. Some of the benefits include:

• Identifying your business entity with the IRS.
• Safeguarding your Social Security Number (SSN) to prevent identity theft.
• Allowing you to hire and manage employees.
• Managing business finances.
• Adding business credibility.

1. EIN Synonyms

The table below lists the different EIN terms that you may encounter. Read them and take note to avoid potential confusion. Following this, I’ll get into the reasons why you need an EIN and the best way to get one.

2. How Do I Find My EIN Number Online?

Unfortunately, the IRS won’t issue another EIN confirmation letter (CP-575) if you’ve lost your original one. You’ll need to request an EIN Verification Letter (147C).

• Both forms are viewed equally by local and state agencies.
• They both act as official documents that can be used for the benefits listed below.

Tip: File your EIN Confirmation Letter in a safe place as soon as you receive it. This should be a dedicated workspace, preferably with other important business documents.

When Should You Get An EIN?

I always advise that all business documents should be filed early as a general rule of thumb. However, this isn’t necessarily the case when filing for your EIN. Don’t file for your EIN until your California LLC is officially approved due to two main reasons:

1. If your LLC is approved, the name on your Certificate of Formation needs to match the one stated on your EIN Confirmation Letter. If not, you’ll run into issues when performing business operations.
2. You’ll need to refile your application and wait until a new LLC name is approved if the first one is rejected. If you’ve already filled out your EIN application using the old business name, you’ll need to cancel the old EIN and get a new one to ensure that they match.

Why You Need An EIN?

You need an EIN to operate your business efficiently within the state of California. Aside from being required by state law in some cases, it’s required to perform several important business functions. Having one ensures that your business operates legally and within state guidelines.

Main reasons why an EIN is essential for your LLC:

• Personal identity protection: Your EIN replaces your SSN, reducing the risk of identity theft.
• Opening a business bank account: Most California banks require you to have an EIN when opening a business bank account.
• Legally hiring employees: You need an EIN to do payroll taxes and reporting when operating in California.
• Applying for business permits and licenses: Most local and state agencies require an EIN to apply.
• Filing federal and California state taxes: It ensures that your LLC has a separate tax identity.
• Enhancing business credibility: Having an EIN separates your personal and business activities, showing professionalism to customers.
• Building credit: An EIN is necessary for credit cards, loans, and financing using your company name.

The application process is fairly straightforward when using my guide. When you consider these benefits, there’s no reason why you shouldn’t get an EIN when forming your business in California.

How Do I File An EIN Application For My California LLC?

The correct way to file your application depends on your residency status and desired processing time. These are your filing options:

1. Online application (Most efficient).
2. By mail.
3. By fax.

If you want to change your LLC type, you’ll need to complete IRS and state paperwork. You’re required to transfer the ownership, amend the Operating Agreement, and update your accountant.

1. Applying For An EIN Online (U.S. Citizens And U.S. Residents)

If you’re a U.S. citizen or resident, you should have a SSN or an Individual Tax Identification Number (ITIN). The best way to apply for an EIN is by using the online IRS application portal.

This is the easiest and most efficient filing method, with applications accepted instantly, provided that everything is correctly completed. The application process should take around 15 minutes to complete.

You can read my step-by-step instructions on how to apply for an EIN online. I’ve provided a detailed breakdown on how to file it efficiently.

Notes:

• You can also apply for your EIN by fax or by mail. However, the approved process is much slower than online.
• You should always use the online filing method unless the IRS has given you an EIN reference number error.

2. Apply For An EIN Via Mail Or Fax (Non-U.S. Residents)

You can still get an EIN as a non-U.S. resident, but you’ll need to apply using the significantly slower mail or fax methods. This is because you can’t complete the EIN online application process with no SSN or ITIN.

In this case, you must mail or fax your completed Form SS-4 to the IRS. Your processing time is the initial mailing time, plus the IRS approval time (Usually days or weeks, depending on whether you use fax or mail).

Read my step-by-step instructions: How To Get An EIN Without An SSN Or ITIN.

IRS Contact Information

You can contact the IRS at any point during your application process, including once it’s received, if you need further guidance.

IRS Contact Number: 1-800-829-4933. Their business hours are 7 A.M. – 7 P.M. (Monday – Friday).

These are your options once you get through:

• Press “1” for English.
• Press “1” for EINs.
• Press “3” if you have an EIN but can’t remember it.

EIN Approval (EIN Confirmation Letter)

The IRS will issue your EIN Confirmation Letter (CP 575) once your application has been accepted. This is official proof that your business entity has been assigned an EIN and that you’re acting as an employer.

You’ll receive your confirmation based on your chosen application method. Online applications tend to be processed immediately once you’ve clicked the “Submit” button. Applications filed by mail or fax tend to take significantly longer (Several weeks in some cases).

If you’ve chosen to file your application online, you’ll be able to download your EIN Confirmation Letter at the end. The IRS will send your letter via mail if you’ve picked the mail or fax options.

Frequently Asked Questions