Let me save you money in the first paragraph: getting an EIN for your LLC is free, takes about 10 minutes on the IRS website, and you should never pay anyone to do it. Yet I regularly meet founders who paid $75–200 to a formation service for something they could have done during a coffee break.
An EIN — Employer Identification Number — is your business’s federal tax ID. Think of it as a Social Security number for your LLC. Here’s the full breakdown: what it is, whether you actually need one, exactly how to apply, and the mistakes that turn a 10-minute task into a two-week headache. If you’re still choosing how to form, our best LLC formation services guide compares your options — just don’t pay extra for EIN filing.
Contents
- What an EIN Actually Is
- Does Your LLC Need One
- When to Apply Timing Matters
- How to Apply Step by Step
- The Responsible Party Rule
- After You Get Your EIN
- Mistakes That Delay Your Number
- What an EIN Does Not Do
What an EIN Actually Is
The EIN is a nine-digit number (formatted XX-XXXXXXX) issued by the IRS that identifies your business for federal tax purposes. It goes on your tax returns, your bank account applications, your payroll filings, and any official document where the business — not you personally — is the taxpayer.
The name is slightly misleading: “Employer” Identification Number suggests it’s only for businesses with employees. It’s not. Plenty of solo LLCs with zero employees need one, which I’ll cover next.
What it isn’t: it’s not a business license, not permission to operate, and not a state tax ID. States have their own separate tax registration systems. The EIN is purely federal, purely identification. It doesn’t cost anything, it never expires, and each LLC gets exactly one — you can’t apply for a second one for the same entity.
One more thing founders ask: does getting an EIN change my taxes? No. It’s an identifier, not a tax election. Your LLC’s tax treatment (disregarded entity, partnership, S-corp) is determined separately. The EIN just gives the IRS a number to attach everything to.
Does Your LLC Need One
The IRS requires an EIN if your LLC meets any of these conditions:
- It has employees (or will hire any)
- It’s taxed as a corporation or partnership (multi-member LLCs are partnerships by default — so yes, you need one)
- It withholds taxes on income paid to non-resident aliens
- It files excise, employment, or alcohol/tobacco/firearms tax returns
- It’s involved in certain trusts, estates, or nonprofit structures
But here’s the practical reality: get one even if you’re not required to. A single-member LLC with no employees isn’t technically required to have an EIN — you can use your SSN. But using your SSN on vendor forms, client W-9s, and bank documents means handing your personal Social Security number to dozens of strangers over the life of the business. An EIN costs nothing and keeps your SSN private. I tell every solo founder to get one on day one.
You’ll also find that banks effectively require it — most won’t open a business account for an LLC without an EIN, regardless of what the IRS technically requires. Since the separate bank account is non-negotiable for liability protection, the EIN becomes non-negotiable in practice.
When to Apply Timing Matters
Apply after your LLC is legally formed (Articles approved by the state), not before. The IRS application asks for the LLC’s legal name and formation date — if the state hasn’t approved your entity yet and the name gets rejected, your EIN is now attached to a name that doesn’t exist. Fixable, but annoying.
The sweet spot: the same day your formation is approved. The online application takes 10 minutes, the EIN is issued immediately, and then you can walk into a bank the next morning with everything you need.
What about the responsible party timing? The application asks who’s the responsible party (more below). Make sure that person has their SSN or ITIN ready before you start — the online session times out, and re-entering everything is irritating.
One timing trap: if you’re electing S-corp taxation, get the EIN first — the S-corp election form requires it. Sequence matters: form LLC → get EIN → file S-corp election (if applicable) → open bank account.
How to Apply Step by Step
Here’s the actual process on the IRS website. This is general information about a public process, not tax advice.
Step 1: Go to the IRS EIN application page. Search “IRS apply for EIN online” — it’s on irs.gov. Make sure you’re on the real IRS site, not a lookalike service charging fees. The real application is free.
Step 2: Start the application as a new entity. Select “Limited Liability Company (LLC)” as the entity type. The system will ask how many members — this determines some follow-up questions.
Step 3: Enter the LLC’s legal name and address. Use the exact legal name from your approved Articles of Organization, including the “LLC” designator and exact punctuation. Mismatches cause problems later with banks.
Step 4: Identify the responsible party. This is the person who controls the LLC’s funds and assets — usually you, the owner. You’ll enter their name and SSN/ITIN. (Details in the next section.)
Step 5: Answer the business questions. What does the business do? When did it start (month/year)? How many employees do you expect in the next 12 months? Answer honestly but don’t overthink — estimates are fine.
Step 6: Choose how to receive confirmation. Select the online confirmation option. The system generates your EIN immediately and gives you a confirmation letter (CP 575) to download and print. Save this letter. It’s your proof of the EIN, and replacing a lost one is a hassle.
Step 7: Done. That’s it. No fee, no waiting period, no mailed documents to wait for. The whole thing genuinely takes about 10 minutes if you have your information ready.
Important limitation: the online application is only available during IRS business hours (roughly 7 a.m. to 10 p.m. Eastern, Monday through Friday). Outside those hours, you’ll have to come back. Plan accordingly.
If you can’t apply online — for example, the responsible party is a foreign person without an SSN/ITIN — you can apply by fax or mail using Form SS-4. Fax takes about a week; mail takes 4–6 weeks. There’s no way around the wait for paper applications, so plan ahead.
The Responsible Party Rule
The IRS tightened this rule and it trips people up: the responsible party must be an individual (a real human being), not another entity. You can’t list your holding company or another LLC as the responsible party.
The responsible party is defined as the person who ultimately owns or controls the entity, or who exercises ultimate effective control over it — the person who controls the money. For most small LLCs, that’s the owner. For a multi-member LLC, it’s typically the managing member.
Each responsible party can only be associated with one EIN application per day through the online system (an anti-fraud limit). If you’re forming multiple LLCs in one day, you’ll hit this wall — space them out.
The SSN/ITIN requirement: the responsible party needs a valid Taxpayer Identification Number. U.S. citizens and residents use their SSN. Foreign individuals without an SSN can use an ITIN. If the responsible party has neither, you’re in fax/mail territory with Form SS-4.
After You Get Your EIN
The number is issued — now put it to work:
Open the business bank account. This is priority one. Bring your approved Articles, EIN confirmation letter, and personal ID. From this day forward, every business dollar flows through this account. No exceptions, no “just this once.”
Update your records. The EIN goes on your operating agreement, your bookkeeping software, and any vendor or client paperwork that asks for a tax ID. Retire your SSN from business use wherever possible.
Register for state taxes if needed. The EIN doesn’t register you for state tax obligations. If your state has sales tax, employer withholding, or its own business taxes, register separately with the state revenue agency.
Set up payroll if hiring. The EIN is what your payroll provider or software uses to file employment taxes. Don’t hire your first employee without payroll infrastructure ready — the compliance obligations start on day one of employment.
File it safely. Store the CP 575 confirmation letter with your formation documents. If you ever lose it, you can request a replacement letter (147C) from the IRS, but it takes time and a phone call. Prevention beats cure.
For the broader setup sequence, our LLC formation services guide walks through everything that follows formation.
Mistakes That Delay Your Number
Paying for it. I’ll say it a third time because it keeps happening: the EIN is free. Formation companies bundle “EIN filing” for $50–200 as a pure-margin upsell. Click the upsell off, do it yourself in 10 minutes.
Applying before formation is approved. The IRS doesn’t verify with the state in real time, so the application will go through — but now your EIN is tied to an entity name/date that might not match your approved Articles. Banks notice mismatches. Wait for approval.
Name mismatches. “Sunrise Marketing LLC” vs “Sunrise Marketing, LLC” vs “SUNRISE MARKETING LLC” — use the exact legal name from your state approval, character for character. Inconsistency between your EIN record, your bank account, and your state filing creates paperwork headaches for years.
Wrong responsible party. Listing someone who isn’t actually in control, or trying to list an entity instead of a person, gets the application flagged. The IRS takes this seriously post-2018 rule changes.
Applying twice. Each LLC gets one EIN. If you applied, got the number, and lost the confirmation letter — don’t apply again. Request a replacement letter instead. Duplicate EINs for one entity create a mess that’s genuinely hard to unwind.
Using a third-party “IRS” site. Scam and lookalike sites charge $200+ for “expedited EIN service.” There is no expedited EIN service. There’s the free IRS application and everything else is a markup. Type irs.gov yourself; don’t click ads.
What an EIN Does Not Do
Let’s clear up the mythology, because EINs get credited with powers they don’t have:
It doesn’t give you a business credit score. Business credit is built separately through business accounts, trade lines, and bureaus like Dun & Bradstreet.
It doesn’t exempt you from taxes. It’s an identifier, not an exemption.
It doesn’t register your business with the state. State formation and state tax registration are separate processes with separate agencies.
It doesn’t protect your business name. That’s trademark law, a different universe entirely.
It doesn’t expire or need renewal. Once issued, it’s yours for the life of the entity. If you dissolve the LLC, notify the IRS to close the account — but the number itself just goes dormant.
The EIN is plumbing — essential, unglamorous, and best handled quickly and correctly so you can get on with the actual business. Ten minutes, free, done. Now go open that bank account.
Frequently Asked Questions
Apply online at irs.gov — it’s free and takes about 10 minutes. Select LLC as the entity type, enter your approved legal business name, identify the responsible party, and you’ll receive your EIN immediately with a downloadable confirmation letter.
Yes, completely free when you apply directly through the IRS. Never pay a third party for EIN filing — formation companies often charge $50–200 for this as an upsell, but the IRS issues EINs at no cost.
Not strictly required by the IRS if you have no employees, but strongly recommended. An EIN keeps your personal Social Security number off vendor forms and client paperwork, and most banks require one to open a business account for the LLC.
After. Wait until your Articles of Organization are approved by the state, then apply the same day. Applying before approval risks tying the EIN to a business name or date that doesn’t match your official formation documents.
Yes. If the responsible party has no SSN, they can use an ITIN for the online application. With neither an SSN nor ITIN, apply by fax or mail using Form SS-4 — fax takes about a week, mail takes 4–6 weeks.
