Getting an EIN for Your California LLP

An Employer Identification Number, or EIN, is a nine-digit number the Internal Revenue Service assigns to identify a business for federal tax purposes. Think of it as the business equivalent of a Social Security number. You'll use it when filing the partnership's tax return, opening bank accounts, hiring employees, and identifying the firm on official paperwork.

Why an LLP always needs one

A single-owner business can sometimes get by using the owner's Social Security number for federal taxes. A limited liability partnership can't. By definition an LLP has two or more partners, which means it files a partnership return with the IRS — and a partnership return requires an EIN. There's no version of a California LLP that operates without one.

Beyond the tax return, the EIN is what lets your firm function as a separate financial entity. Banks require it to open an account in the partnership's name. It's how you keep partnership finances distinct from any partner's personal finances — separation that isn't just tidy bookkeeping but part of respecting the entity you registered. The EIN is one of the first things to secure right after your Form LLP-1 is accepted.

Timing matters. You generally want your LLP to exist before you apply, and you want the EIN before certain downstream steps.

Apply after the LLP is registered

Wait until your Application to Register (Form LLP-1) has been accepted by the California Secretary of State and the partnership officially exists. Applying with the partnership's confirmed legal name and formation details keeps the IRS record consistent with the state record, which avoids mismatches later when a bank or the Franchise Tax Board cross-references the two.

Apply before you bank, hire, or file

Get the EIN in hand before you:

• Open the partnership's bank account — banks require it
• Hire employees — payroll and employment tax filings run on the EIN
• File the partnership's tax returns — Form 1065 federally and Form 565 in California both use it

Because the online application issues the number immediately, there's rarely a reason to delay once the LLP is registered. Applying the same week you get your state confirmation keeps the whole setup moving.

The fastest and most common route is the IRS online application, and it costs nothing. Be wary of third-party sites that charge a fee to "obtain" an EIN — the IRS issues it for free directly.

The online application

1. Go to the IRS website and open the EIN Assistant at IRS.gov.
2. Select that you're applying for a partnership — the correct classification for an LLP taxed as a partnership.
3. Provide the partnership's legal name exactly as registered with California, its address, and the formation details.
4. Identify the responsible party — a partner who controls or manages the entity — along with that person's Social Security number or ITIN.
5. Submit. The system validates the information and issues the EIN immediately.
6. Download and save the confirmation letter (the CP-575). Keep it with your formation documents; banks and your CPA will ask for it.

The online application takes roughly ten to fifteen minutes and is available during the IRS's posted hours. Once you have the number, you can use it right away — you don't have to wait for anything to arrive by mail.

If you can't apply online

The online tool requires the responsible party to have a U.S. Social Security number or ITIN. If the responsible party doesn't have one, you apply using Form SS-4, submitted by fax or mail. This route takes longer — days to weeks depending on the method — so plan accordingly if it applies to your firm.

A few predictable errors trip up new partnerships. Knowing them in advance saves a headache.

Paying a third party for a free service

Numerous websites offer to "get you an EIN" for a fee. The IRS provides EINs at no cost. Some formation packages bundle EIN retrieval as a convenience, which is fine if you understand what you're paying for — but you never have to pay the IRS itself for the number.

Applying before the LLP exists

Applying before your Form LLP-1 is accepted can create a mismatch between the IRS record and the state record. Register the partnership first, then apply with the confirmed legal name.

Using the wrong entity classification

When the EIN Assistant asks what type of entity you're forming, choose partnership, since that's how an LLP is taxed by default. Selecting the wrong classification can create confusion with the IRS about how the entity files. If your firm later elects a different tax treatment, that's a separate election handled with your CPA.

Losing the confirmation letter

The CP-575 confirmation is the official record of your EIN, and the IRS doesn't reissue it. Save a digital copy and a printout with your formation documents. If you misplace the number itself later, you can request a confirmation of the EIN from the IRS, but keeping the original is far simpler.

With the number in hand, your LLP can operate as a full financial entity. The immediate next step for most firms is opening a business bank account in the partnership's name. Banks typically ask for the filed Form LLP-1 confirmation, the EIN letter, the partnership agreement, and identification for the authorized signers — so bring all four.

The EIN then follows the partnership through its life: it's on every federal and California partnership return, on payroll filings if you hire, and on the tax documents your CPA prepares each year. Keep it accessible but protected — it identifies your firm, and while it's less sensitive than a personal Social Security number, it's still not something to publish casually. From here, the EIN quietly does its job in the background as the firm's federal tax identity for as long as the partnership exists.