Louisiana EIN: How to Apply and Register State Tax Accounts

Here’s how to get an EIN in Louisiana, start to finish, as of 2026. The EIN is free from the IRS and issued immediately online once you’re approved; the application itself takes about 15 minutes. It’s the federal piece; once you form your Louisiana LLC, your state tax accounts come separately through the Louisiana Department of Revenue’s geauxBIZ and LaTAP portals.

Does Your Louisiana LLC Actually Need an EIN?

Whether a Louisiana LLC needs an Employer Identification Number depends on its structure and whether it hires. The IRS sets the rule; Louisiana doesn’t issue this number at all.

A single-member LLC with no employees is a disregarded entity, so the IRS doesn’t require an EIN. Most owners get one anyway: it keeps a Social Security number off vendor forms, and banks want it to open a business bank account.

Multi-member LLCs always need one, since the IRS defaults them to partnership taxation. Ownership terms belong in a Louisiana operating agreement, which the state won’t file for you. Filing fees run separately from the free EIN; see what a Louisiana LLC costs to file.

How to Get an EIN in Louisiana, Step by Step

Most Louisiana owners wrap up the online application in about 15 minutes. The federal process is identical statewide, so this works whether the shop’s in New Orleans or Shreveport. In Aaron Kra’s experience filing across 25-plus states, the entity-classification screen forces more refiles than anything else.

1. Confirm your Louisiana LLC is approved: Apply after the Secretary of State clears your Articles of Organization, so the EIN matches the state record. Worth checking how long Louisiana LLC approval takes first.
2. Open the IRS EIN Assistant: The online tool runs Monday to Friday, 6 a.m. to 1 a.m. Eastern the next day, plus weekend hours.
3. Pick the right entity type: Match your LLC’s classification. This is the screen that trips people; choosing “corporation” as a default LLC creates cleanup later.
4. Enter the legal name and any trade name: Use the exact name from the Louisiana Secretary of State filing, then add a trade name only if you’ve registered one.
5. Name the responsible party: A natural person with an SSN or ITIN, never a nominee or another entity. The IRS issues one EIN per responsible party per day.
6. Choose your reason and submit: Pick why you’re applying, review, and send it.
7. Download the CP 575 right away: Save the EIN confirmation letter the second it appears, because the IRS won’t resend it. Lose it, and you’re requesting a 147C instead.

No Social Security number doesn’t shut the door. Applicants whose principal place of business sits outside the U.S. can call 267-941-1099, Monday to Friday, 6 a.m. to 11 p.m. Eastern, or send Form SS-4 by fax or mail.

Bottom line: the EIN is free from the IRS. Sites charging $150 to $300 just resell it. Before paying, see which help earns it; you can compare Louisiana LLC formation services first.

Louisiana EIN Approval Letter: Save Your CP 575 Before LDR, LWC, and Parish Tax Setup

Once the IRS approves your Louisiana EIN online, the screen should let you download the CP 575 EIN Confirmation Letter. Save that letter before you move into Louisiana registrations, because the EIN itself is only the federal number. Louisiana tax accounts, unemployment numbers, and parish sales tax filings are separate layers.

What it looks like

The CP 575 is the IRS letter that shows your LLC’s legal name, mailing address, assigned EIN, and confirmation details. For a Louisiana LLC, this is the letter you compare against the Secretary of State record before using the EIN with banks, the Louisiana Department of Revenue, payroll providers, or local sales tax systems.

Example CP 575 EIN confirmation letter

For LDR accounts

Use the EIN when setting up Louisiana revenue accounts through LDR’s online registration, LaTAP, or Form R-16019.

For payroll

Do not confuse the EIN with the LWC Employer Account Number, also called the EAN or SID, used for unemployment reporting.

For local sales tax

If you sell taxable items, keep the CP 575 with your Louisiana sales tax records and parish/local filing notes.

Save the PDF immediately: the IRS does not treat the CP 575 like a reusable download you can pull again later. If you lose it, you usually need an IRS 147C verification letter instead, which can slow down bank, payroll, LDR, or LWC setup.

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What to Have Ready: Your geauxBIZ LLC Name and Charter Number

A little prep keeps the application fast and heads off a name mismatch later. Before opening the IRS tool, a Louisiana LLC owner should have:

• The exact LLC legal name as filed with the Louisiana Secretary of State
• The Louisiana charter number and formation date
• The responsible party’s name plus an SSN or ITIN
• The entity type and reason for applying
• A business mailing address

Boost Suite’s call is to form the LLC first, then request the EIN, so the CP 575 matches the state record. It’s a small step that saves real cleanup at the bank.

Name not set yet? You can search the Louisiana business filings database to confirm it’s clear first. Every Louisiana LLC also has to name a Louisiana registered agent with a physical in-state address.

EIN vs Your Louisiana Revenue Account Number, Sales Tax Account, and LWC EAN

An EIN and a Louisiana Tax Number aren’t the same thing, and that’s the most common mix-up in the search results. One’s federal; the rest come from state agencies.

Register with the LDR and it issues a Louisiana Revenue Account Number (also called a Louisiana Tax Number) that covers sales tax and withholding. The sales tax account adds a registration certificate and a Location ID.

Hire employees and a third number shows up. The Louisiana Workforce Commission assigns an Employer Account Number (EAN), also called a State Identification Number (SID), for unemployment reporting.

Registering for Louisiana Taxes After You Get Your EIN

The EIN unlocks the state layer; it doesn’t replace it. Once it’s issued, a Louisiana LLC registers with whichever agencies fit what it does. Here’s where Louisiana asks more of you than most states.

Louisiana Withholding Tax Account

Hiring employees means a withholding tax account with the Louisiana Department of Revenue. Register fastest through LDR’s online business registration, or mail Form R-16019, the Application for Louisiana Tax Number (CR-1).

Louisiana’s income tax is a flat 3% as of 2025. Employers file Form L-1, reconcile on Form L-3, and from January 1, 2026 the e-filing mandate covers every withholding return.

Louisiana Sales and Use Tax Account

Selling taxable goods or services triggers a sales and use tax account with the LDR, at a 5% state rate as of 2025. Registration adds a sales tax certificate and a Location ID.

Returns run on Form R-1029, due the 20th after each period closes. Most now fall under the 2026 e-filing mandate, too.

Parish E-File and Local Sales Tax

Here’s the part generic guides skip: Louisiana stacks parish and city sales tax on top of the state rate. Owners file the combined state-and-local return through Parish E-File, not the LDR site alone. An EIN doesn’t touch this layer.

Remote Sellers Without a Louisiana Storefront

Out-of-state sellers shipping into Louisiana register with the Louisiana Sales and Use Tax Commission for Remote Sellers. The trigger is the economic nexus threshold, set at $100,000 in sales delivered into the state.

One quirk worth knowing: the Commission’s FAQ still shows older “$100,000 or 200 transactions” wording. The 2023 and 2025 legislative updates dropped the 200-transaction test, so the current rule is the $100,000 threshold alone.

Louisiana Unemployment Insurance

Employers also file with the Louisiana Workforce Commission, which decides unemployment liability and assigns the EAN or SID when a business is liable. The 2026 taxable wage base is $7,000 per employee.

To open any state account, you log into geauxBIZ or LaTAP, enter your EIN (it’s required there), and add the accounts that apply. Online’s quickest, and the EIN has to exist first.

EIN Mistakes That Cost Louisiana LLC Owners Time

A handful of errors show up again and again on Louisiana applications, and they’re all avoidable.

• Treating the EIN as a state tax ID: It doesn’t cover LDR or LWC accounts; those register separately.
• Stopping at the LDR account: Skipping Parish E-File and local collectors leaves a sales tax gap.
• Naming a nominee or an entity as responsible party: The IRS wants a natural person with an SSN or ITIN.
• Choosing the wrong entity classification: The SS-4 entity screen is the one that forces a refile.
• Assuming geauxBIZ issues the EIN: It links your filings, but only the IRS issues the number.
• Using a name that doesn’t match the Secretary of State record: Mismatches snarl the CP 575 and your bank.

If You Lose Your Louisiana EIN or Change Your LLC

Misplacing the EIN isn’t a crisis. It’s on the CP 575, past tax returns, and old bank statements, and the IRS can confirm it by phone.

Still stuck? You can verify an EIN number through the usual lookup routes. Or request a 147C verification letter from the IRS; it stands in for the CP 575, which the agency won’t reissue.

Worth flagging: a few changes need a brand-new EIN. A sole proprietorship becoming an LLC, or a single-member LLC adding members to go multi-member, both require one. Plain name or address updates don’t; those use Form 8822-B or 8832.

State duties don’t stop at the EIN, either. A Louisiana LLC still has to file its Louisiana annual report yearly to keep good standing, separate from anything federal.

Louisiana EIN Frequently Asked Questions

These come up most often once Louisiana owners start sorting the EIN from the state numbers. The answers reflect IRS and Louisiana guidance as of 2026.