Most banks require an EIN before they'll open a business account, but the rule depends on your business structure

If you're a sole proprietor with no employees, you can open a business bank account using your Social Security number instead of an EIN. If you're a partnership, LLC, S corporation, or C corporation, you need an EIN — the bank will ask for it during account setup. Some banks will let you apply for the EIN at the same time you open the account, but most want the number in hand before they start the paperwork.

The reason banks care about this: an EIN is how the IRS tracks business income and tax filings. A sole proprietor can report business income on their personal tax return using their SSN, so the bank has a way to identify you either way. Any other structure is a separate legal entity, and the IRS needs an EIN to know who filed what.

Getting an EIN is free and takes minutes online. You can do it before you open the account, which speeds up the whole process.

Key Takeaways

  • Sole proprietors can use their Social Security number to open a business bank account; all other business structures need an EIN.
  • An EIN is free and takes about 15 minutes to get online through the IRS website, or you can apply by mail or phone.
  • Most banks ask for your EIN before opening the account, though some allow you to apply for one during the account setup process.
  • You'll need your EIN for tax filings, hiring employees, and opening business credit accounts, so getting one early saves time later.

Who needs an EIN and who doesn't

A sole proprietor — someone running a business by themselves with no employees — can use their SSN on a business bank account. The bank may still ask you to call yourself a sole proprietor on the account paperwork, but they don't require a separate tax ID. This is the only structure where you have a choice.

Everyone else needs an EIN: partnerships (two or more owners), LLCs (limited liability companies), S corporations, C corporations, and nonprofits. If you've formed a legal entity separate from yourself, the IRS treats it as its own taxpayer, and that taxpayer needs an EIN.

If you're a sole proprietor but plan to hire employees later, get an EIN now. You'll need it the moment you put someone on payroll, and it's easier to add it to an existing account than to switch accounts or deal with the IRS separately.

How to get an EIN before opening your account

The fastest way is online through the IRS website. Go to irs.gov, search for "apply for an EIN," and use their online form. You'll answer questions about your business structure, location, and what you do. The process takes about 15 minutes, and you get your EIN immediately on screen — you can write it down or print the confirmation page.

If you can't use the online form (some business structures aren't may be able to access), you can apply by mail using Form SS-4, or call the IRS at 1-800-829-4933. By mail takes about four weeks. By phone, you'll get your EIN the same day, but you have to call during business hours and have your business information ready.

Once you have the EIN, bring it to your bank appointment or have it ready when you call to open the account. Write it down clearly — banks need it exactly right to set up your account correctly.

What happens if you open an account without an EIN

Some banks will let you open a business account as a sole proprietor using only your SSN, and you can add an EIN later if your business structure changes. Other banks won't open a business account at all without an EIN, even for sole proprietors — they want the separation between personal and business finances to be clear from the start.

If you open an account with your SSN and later get an EIN, contact your bank and ask them to update your account records. This usually takes a few days and doesn't require closing and reopening the account. Keep both numbers on file so there's no confusion when you file taxes or the IRS sends notices.

When the bank asks you to apply for an EIN during account setup

Some banks, especially smaller ones or credit unions, will let you apply for an EIN as part of the account opening process. They'll give you a form or direct you to the IRS website while you're sitting there. If this happens, do it — it's the fastest way to get both the EIN and the account open on the same day.

If the bank says they can apply on your behalf, ask them to clarify what that means. Most banks can't actually submit the application for you; they can only point you to where to do it yourself. A few larger banks have a relationship with the IRS that lets them submit the form, but this is rare. Either way, you'll get your EIN within minutes to a few hours.

Documents you'll need to bring or have ready

To open a business bank account, bring your EIN (or SSN if you're a sole proprietor), a government-issued ID, and proof of your business address. For the business address, a utility bill, lease, or mortgage statement works. If you're operating from home, a recent bill with your home address is fine.

If your business is an LLC, corporation, or partnership, bring your formation documents — the articles of organization, articles of incorporation, or partnership agreement. The bank needs to see that the business legally exists and that you're authorized to open the account on its behalf. If you're the sole owner, one document is usually enough. If there are multiple owners, the bank may want signatures from all of them or a resolution authorizing you to open the account.

Some banks also ask for a business license or DBA (doing business as) certificate if you're operating under a name different from your legal name. Check with your bank ahead of time about what they need — requirements vary.

EIN vs. SSN: what your bank actually uses

Your bank uses the EIN or SSN to report interest earned on the account to the IRS. If the account earns interest (which most business accounts do, though the rate is often very low), the bank sends a 1099-INT form to the IRS showing who earned that interest. The IRS needs to know whether to look for that income on a business tax return (EIN) or a personal return (SSN).

The bank also uses this number to run background checks and verify you're not on any government watchlists. Having the right number on file prevents delays and confusion later.

Your EIN and SSN are different things and serve different purposes. Your SSN is tied to you personally; your EIN is tied to your business. If you're a sole proprietor using your SSN, the bank knows the account is yours personally but being used for business. If you have an EIN, the bank knows the account belongs to a separate business entity.

Frequently Asked Questions

Can I use my Social Security number if I have an LLC?

No. An LLC is a separate legal entity, so it needs its own EIN. The bank won't open a business account for an LLC using only an SSN. You must get an EIN first, even if your LLC has no employees.

How long does it take to get an EIN online?

The online application takes about 15 minutes to complete, and you get your EIN immediately when you finish. You can print the confirmation page or write down the number right away. This is the fastest method available.

What if I apply for an EIN but the IRS says my business doesn't exist yet?

The IRS doesn't check whether your business is actually operating — they just verify your information is correct. If they reject your application, it's usually because of a typo or mismatch in your name or address. Fix the error and reapply. You don't need to wait for the business to be "real" to get an EIN.

Do I need an EIN if I'm just starting and haven't registered my business yet?

You can get an EIN before you officially register your business, but you'll need to know your business structure (sole proprietor, LLC, corporation, etc.). If you haven't decided yet, wait until you have — the EIN application asks for this information and you can't change it later without applying again.

Can I open a business account without an EIN if I'm a sole proprietor?

Some banks allow it using your SSN; others require an EIN even for sole proprietors. Call your bank and ask their specific policy before you go in. If they allow SSN-only accounts, you can always add an EIN later if you hire employees or change your business structure.