Most banks will ask for an EIN, but some will open an account with just your Social Security number

Whether a bank requires an Employer Identification Number (EIN) depends on your business structure and the bank's own rules. Sole proprietors can often use their Social Security number instead. Partnerships, LLCs, and corporations almost always need an EIN because they are separate legal entities. Some banks are flexible; others have a hard requirement. The fastest way to know is to call the bank's business account line and ask directly what they need for your specific business type.

If you do not have an EIN yet and the bank requires one, you can get one free from the IRS in minutes by applying online at irs.gov, or by phone, mail, or fax. The process takes about 15 minutes online and you receive your number immediately. You do not need to wait for anything to arrive in the mail.

Key Takeaways

  • Sole proprietors can open a business checking account using their Social Security number at many banks, though some banks prefer or require an EIN.
  • LLCs, partnerships, and corporations must have an EIN because the IRS treats them as separate entities from their owners.
  • You can obtain an EIN free from the IRS online in about 15 minutes and receive it immediately without waiting for mail.
  • Different banks have different policies—some require an EIN for all business accounts, while others allow SSN for sole proprietors.
  • Bring your EIN or SSN, a government ID, and proof of your business address when you open the account in person or online.

When banks require an EIN versus when they accept a Social Security number

Banks treat sole proprietorships differently from other business structures. A sole proprietor is legally the same person as the business, so the IRS does not require you to have a separate EIN. Many banks recognize this and will let you open a business account using your Social Security number. However, some banks—particularly larger national chains—have a blanket policy requiring an EIN for all business accounts, regardless of structure. Calling ahead saves you a trip.

If your business is an LLC, partnership, S-corporation, or C-corporation, you must have an EIN. These structures are legally separate from their owners, and the IRS assigns each one a unique number. Banks will not open an account for these entities without it. The same applies if you plan to hire employees—you need an EIN to run payroll, and most banks will require it before opening the account.

Some banks also ask for an EIN even from sole proprietors if you are operating under a trade name (a name different from your legal name). The reasoning is that the trade name is a separate business identity, even though legally it is still you. Again, this varies by bank.

How to get an EIN if you do not have one yet

The fastest route is the IRS website. Go to irs.gov, search for "apply for an EIN online," and follow the form. You answer questions about your business type, location, and what you do. The whole process takes about 15 minutes. When you finish, the IRS gives you your EIN on screen immediately. You can write it down or print the confirmation page.

If you prefer not to use the website, you can call the IRS Business and Specialty Tax Line at 1-800-829-4933. They will ask the same questions and issue your EIN over the phone. You can also mail or fax Form SS-4 to the IRS, but this takes longer—usually two to four weeks for mail and one to two weeks for fax.

You do not need to have filed taxes, opened a bank account, or hired employees before you get an EIN. You can get one as soon as you decide to start a business. There is no cost.

What documents to bring when you open the account

Bring your EIN (if required) or Social Security number, a government-issued photo ID, and proof of your business address. Proof of address can be a utility bill, lease, or mortgage statement in your name. Some banks also ask for your business license or articles of incorporation, depending on your structure.

If you are opening the account online, you will upload these documents or enter the information directly into the bank's form. If you are going in person, bring originals or copies. Have your EIN written down or on your phone so you do not have to search for it.

If you are opening the account as a representative of an LLC or corporation (not as the sole owner), bring documentation showing you have authority to open accounts on behalf of the business—usually a resolution from the board or operating agreement.

Banks with different EIN policies

Large national banks like Chase, Bank of America, and Wells Fargo typically require an EIN for all business accounts, even sole proprietorships. They have standardized systems and do not make exceptions. If you are a sole proprietor without an EIN, you will need to get one before opening an account at these banks.

Community banks and credit unions are often more flexible. Many will open a business account for a sole proprietor using only a Social Security number. Some will even let you open under a trade name without an EIN. Call your local bank and ask—they can tell you their specific policy in one conversation.

Online banks vary. Some, like Novo and Mercury, are designed for small businesses and have streamlined processes that may not require an EIN for sole proprietors. Others, like Square Cash for Business, have different requirements. Check the bank's website or call before you start the application.

What happens if you open an account without an EIN but later need one

If you opened a sole proprietor account with your Social Security number and later decide to form an LLC or hire employees, you will need to get an EIN and update your account with the bank. Call your account manager and ask how to add the EIN to your existing account. Some banks let you do this over the phone; others require you to come in or fill out a form.

You do not have to close the account and open a new one. The bank can usually link the EIN to your existing account number. However, if you are changing your business structure (for example, converting from a sole proprietorship to an LLC), you may need to open a new account in the LLC's name because the old account was opened under your personal SSN.

Timeline for opening a business checking account

If you already have an EIN or are using your Social Security number, opening a business checking account takes one to three business days. Online applications are usually faster—sometimes same-day approval. In-person applications at a branch can be completed in 30 minutes to an hour, and the account is active the same day or the next business day.

If you do not have an EIN and the bank requires one, add 15 minutes to get the EIN online from the IRS, then proceed with the account opening. The total time is still under one business day if you do everything online.

Some banks place a hold on deposits for a few days while they verify your information, even after the account is open. Ask about this when you open the account so you know when funds will be available.

Frequently Asked Questions

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

No. The IRS requires all LLCs to have an EIN, and banks will not open an account for an LLC without one. An LLC is a separate legal entity, so it must have its own tax identification number. You cannot use your personal SSN for the LLC's business account.

What if I apply for an EIN but the IRS says I already have one?

The IRS keeps records of all EINs issued. If you applied for one years ago and forgot about it, the IRS system will tell you the number when you apply again. Write down the number they give you and use that for your bank account. You do not need a new one.

Do I need an EIN if I am a freelancer or consultant working under my own name?

Not required by law. As a sole proprietor, you can use your Social Security number on your tax return and for a business bank account. However, many banks still prefer or require an EIN for business accounts, so check with your bank first. Getting an EIN is free and takes 15 minutes, so many freelancers get one anyway for privacy and to separate personal and business finances.

Can I open a business account online without going to a branch if I need an EIN?

Yes. Get your EIN from the IRS online first, then complete the bank's online application. You will upload your ID and proof of address. Most online banks can approve and activate the account within one to three business days without you ever visiting a branch.

What if the bank says they do not have my EIN on file after I open the account?

Call the bank's business account support line and provide your EIN. They can add it to your account. This sometimes happens if the EIN was very recently issued and has not yet appeared in all databases. Providing it directly to the bank resolves the issue quickly.