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Do You Need an EIN — or Can You Use Your SSN?

Answer 7 questions and get a clear answer based on your business structure, goals, and residency — no guessing required.

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Find Out Which Tax ID Your Business Needs

This quiz covers the IRS conditions that trigger an EIN requirement, the practical reasons an EIN is strongly advisable even when not required, and the special path available to international entrepreneurs.

Question 1 of 7 14%
Question 1 of 7
Does your business have any employees — including W-2 workers or 1099 contractors you pay through payroll?
Employers are required by the IRS to have an EIN regardless of business structure. This includes even a single employee.
Question 2 of 7
What is your business structure?
LLCs, corporations, and partnerships each have specific IRS rules about when an EIN is required — and when it is strongly advisable.
Question 3 of 7
Are you opening — or do you plan to open — a business bank account?
The vast majority of banks and credit unions require an EIN to open a business checking or savings account, regardless of what the IRS technically requires.
Question 4 of 7
Do you file — or expect to file — excise tax, employment tax, or alcohol/tobacco/firearms (ATF) tax returns?
Businesses required to file these specific IRS forms must have an EIN. This is distinct from ordinary income tax filings.
Question 5 of 7
Are you a US citizen or resident with a valid Social Security Number (SSN)?
Your residency status affects which EIN application path is available to you. Non-US residents without an SSN or ITIN have a separate route through IRS Form SS-4.
Question 6 of 7
Do you want to keep your Social Security Number private from vendors, clients, and contractors?
Every time you complete a W-9 form, your SSN is exposed. An EIN lets you use a separate business identifier instead — protecting your most sensitive personal number.
Question 7 of 7
Are you planning to elect S-Corporation tax status — either now or in the future?
An S-Corp election (IRS Form 2553) requires an EIN. LLCs that plan to eventually elect S-Corp treatment will need one before that election can be made.

Why this result — based on your answers

    What is an EIN?

    An Employer Identification Number (EIN) is a nine-digit tax identification number assigned by the IRS to identify a business entity — structured as XX-XXXXXXX. Despite the word "employer" in the name, you do not need to have employees to get one. An EIN functions as a Social Security Number for your business: it identifies the entity on tax filings, bank account applications, vendor forms (W-9), business credit applications, and licensing paperwork. Once issued, an EIN is permanent and does not expire. A single business can only have one EIN. The number is tied to the entity, not the owner — so if you dissolve a business and form a new one, you will need a new EIN for the new entity.

    Our Position on Privacy

    In our opinion, every LLC should obtain an EIN — even when it is not technically required by the IRS. Every time you complete a W-9 form without an EIN, your Social Security Number goes to another vendor, client, or financial institution. We value your privacy because we value ours. Handing your SSN to every person who writes you a check is a pattern we do not recommend, and an EIN eliminates that exposure entirely at a very low cost.

    We handle EIN applications — get yours in 24 hours

    Our team prepares and submits your EIN application so you do not have to navigate IRS forms or wait on hold. Domestic applications are typically processed and delivered within one business day.

    Get My EIN — $[PRICE] → Bundle with LLC Formation

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    Our Position

    Why We Recommend an EIN for Every LLC — Even When Not Required

    The IRS does not require a single-member LLC with no employees to obtain an EIN. In their framework, a disregarded entity can simply use the owner's Social Security Number for tax purposes. That is a technically accurate statement. It is not, in our view, good advice for most business owners.

    Here is the practical reality: if you operate an LLC of any kind, you will eventually be asked to complete a W-9 form. A W-9 requires either an SSN or an EIN. If you do not have an EIN, you are handing your nine-digit personal identifier — the same number attached to your credit history, your tax returns, and your identity — to every client, vendor, contractor, or institution that requests it. That list grows larger every year you are in business.

    In our opinion, the question is not "am I required to have an EIN?" — it is "why would I expose my SSN to every business relationship when I do not have to?"

    There is also the business credit dimension. Establishing a business credit profile through Dun & Bradstreet, Experian Business, or Equifax Business requires an EIN tied to your entity. Without one, there is no separation between your personal credit history and your business's financial standing — which limits your borrowing options, your vendor payment terms, and your ability to grow independently of your personal finances.

    Banks reinforce the same reality. The overwhelming majority of financial institutions will not open a business checking account for an LLC without an EIN. They may accept an SSN for a sole proprietorship DBA, but the moment you present an LLC operating agreement, the EIN becomes a practical requirement regardless of what the IRS technically mandates.

    The cost of obtaining an EIN is low. The cost of not having one — measured in privacy exposure, limited banking access, and the inability to build business credit — is far higher over the life of your company. We recommend every LLC obtain an EIN at or before the time of formation.

    International Applicants

    How Non-US Residents Can Get an EIN Without an SSN

    One of the most frequently misunderstood facts in US business formation is this: you do not need a Social Security Number or an ITIN to obtain an EIN. The IRS's online EIN application does require an SSN or ITIN — but that is the online-only restriction, not a universal requirement.

    Foreign nationals who do not have an SSN or ITIN can obtain an EIN by submitting a paper Form SS-4 directly to the IRS by fax or mail. The fax method is significantly faster — the IRS typically returns the EIN within four business days of receiving the fax. The mail route can take four to five weeks.

    What you will need

    To complete Form SS-4 as a foreign applicant, you will need: the legal name and address of your US entity (your LLC or corporation), the state of formation, your name as the responsible party, your foreign address, a description of the business activity, and the reason you are applying (new business). You do not need a US address, a US bank account, or a US phone number to apply. The IRS will mail your EIN confirmation letter (CP 575) to the address you provide.

    This path is available to entrepreneurs in virtually every country. Non-resident aliens commonly use US LLCs formed in Wyoming, Delaware, or Florida to access US payment processors, banking, and e-commerce platforms. Obtaining the EIN is the step that makes all of that functional. If you are operating a non-US business with US operations, this is not an edge case — it is a standard part of formation.

    Our team handles the SS-4 preparation and fax submission for international clients. Because the fax-to-IRS process requires navigating specific formatting requirements and timing windows, having someone who manages this regularly is meaningfully faster than attempting it on your own from outside the country.

    Frequently Asked Questions

    A single-member LLC is not required by the IRS to have an EIN if it has no employees and does not file excise tax returns. The entity is treated as a disregarded entity and can use the owner's SSN. However, most banks require an EIN to open a business checking account, and W-9 forms expose your SSN to every vendor relationship. We recommend every LLC obtain an EIN regardless of whether it is technically required.
    Yes. Non-US residents without an SSN or ITIN can obtain an EIN by submitting IRS Form SS-4 by fax or mail. The IRS does not require the responsible party to have a US tax identification number when the application is submitted through these channels. This path is fully available to foreign nationals forming a US LLC or corporation and is one of the most underserved aspects of US business formation for international entrepreneurs.
    An EIN is legally required if your business has employees (W-2 or payroll), is structured as a partnership or multi-member LLC, is a corporation of any type, files excise tax returns, files employment tax returns, withholds income tax on payments to non-resident aliens, or has a Keogh or qualified retirement plan. Sole proprietors with zero employees are technically exempt, but most active businesses eventually trigger one of these conditions.
    Obtaining an EIN does not by itself change how your business is taxed. A single-member LLC with an EIN is still a disregarded entity by default — it does not become a corporation or change its tax classification simply by having a number. Tax classification is determined separately through Form 8832 (entity classification election) or Form 2553 (S-Corp election). We recommend consulting a tax professional for advice specific to your situation — nothing in this tool constitutes tax advice.
    For US residents applying with an SSN or ITIN, the IRS issues EINs immediately through their online application during business hours. For international applicants applying by fax, the IRS typically responds within four business days. Mail applications can take four to five weeks. When you order through State LLC Service, we handle the complete application process and deliver your EIN within 24 hours for domestic applicants.

    Informational purposes only. The content and quiz results on this page are provided for general educational purposes and do not constitute legal, tax, or financial advice. Tax rules can change, and the IRS may update its requirements without notice. Nothing here creates an attorney-client or CPA-client relationship. Consult a qualified tax professional or attorney for advice specific to your situation before making any business or tax decisions.