Most banks will ask for an EIN, but not all require one

Banks vary on whether they demand an Employer Identification Number (EIN) before opening a business checking account. Large national banks almost always require one. Smaller banks and credit unions are more flexible — some will open an account using your Social Security Number (SSN) instead, especially if you're a sole proprietor. The catch: using your SSN ties your personal credit to the business account, which defeats much of the point of separating the two.

If a bank says it needs an EIN and you don't have one yet, you have two paths. You can get an EIN from the IRS before you open the account, which takes about 15 minutes online. Or you can ask the bank whether it will hold the account open temporarily while you obtain one — some do, some don't. Asking first saves you a wasted trip.

Key Takeaways

  • National banks typically require an EIN; smaller banks and credit unions often accept a Social Security Number as an alternative for sole proprietors.
  • You can obtain an EIN free from the IRS online in about 15 minutes, or by phone or mail if you prefer.
  • Using your SSN instead of an EIN for a business account means the account appears on your personal credit report and offers no legal separation between you and the business.
  • Call the bank before visiting to confirm whether it requires an EIN or will accept an SSN, and whether it can hold an account while you get an EIN.
  • Some banks ask for an EIN application receipt or letter from the IRS if you've just applied; others accept the application number alone.

Why banks ask for an EIN in the first place

An EIN is a nine-digit identifier the IRS assigns to businesses. Banks use it to report interest earned on the account and to verify that the business is real. It also creates a legal boundary: the account belongs to the business entity, not to you personally. That separation protects you if the business is sued or goes into debt — creditors can't automatically reach your personal assets.

When you use your SSN instead, the bank still opens the account, but it's legally tied to you as an individual. That means the account can show up on your personal credit report, and any debt the account runs up could affect your personal credit score. For a sole proprietor running a small side business, that might not matter much. For anyone planning to hire employees, take out a business loan, or operate for more than a year or two, it creates unnecessary risk.

How to get an EIN if you don't have one

The fastest way is online through the IRS website. Go to irs.gov, search for "apply for an EIN," and use the online form. You'll answer questions about your business structure (sole proprietor, LLC, S-corp, etc.), what you do, and where you operate. The process takes 10 to 15 minutes, and you receive your EIN immediately on screen. Write it down or screenshot it — you'll need it for the bank.

If you prefer not to apply online, you can call the IRS Business and Specialty Tax Line at 1-800-829-4933. They'll issue an EIN over the phone and mail you a formal letter. That takes longer — the letter arrives in about two weeks — but some banks accept the phone confirmation number in the meantime. You can also mail Form SS-4 to the IRS, though that's the slowest option and takes three to four weeks.

You do not need to have filed taxes, hired employees, or registered your business anywhere to get an EIN. The IRS issues them to businesses that haven't started operating yet. There is no cost.

What to bring to the bank if you just applied for an EIN

If you applied online, bring the confirmation page showing your EIN and the date you received it. If you applied by phone, bring the confirmation number. Some banks will open the account on the spot with just that. Others want a formal letter from the IRS, which arrives by mail weeks later — in that case, ask whether the bank will hold the account open temporarily or whether you need to wait for the letter before opening it.

A few banks ask for additional documents even after you have an EIN: a business license, articles of incorporation or organization, a lease or utility bill showing the business address, and a photo ID. These requirements vary by bank and by state. Call ahead and ask what the bank needs before you visit. That way you won't make a trip only to be turned away because you're missing one document.

Banks that commonly accept SSN instead of EIN

Smaller regional banks and credit unions are more likely to open a business account using your SSN if you're a sole proprietor with no employees. Examples include local community banks, some online banks, and most credit unions. However, policies change, and even banks that once accepted SSN-only accounts have started requiring EINs in recent years.

If you want to avoid getting an EIN, call several banks in your area and ask directly: "Will you open a business checking account for a sole proprietor using only my Social Security Number?" Write down the names of the banks that say yes. Then weigh whether the convenience is worth the risk of mixing personal and business finances. For most people, spending 15 minutes to get an EIN is the smarter choice.

What happens if you open an account without an EIN and the bank later asks for one

Some banks open accounts on an SSN-only basis but later require you to provide an EIN or close the account. This usually happens during the bank's annual review of business accounts, or if you apply for a business credit card or loan. When it does, you have a few weeks to get an EIN and provide it to the bank. The account doesn't close immediately.

If you ignore the request and don't provide an EIN, the bank may freeze the account or close it without warning. You'll still have access to your money, but you won't be able to deposit checks or make transfers until you resolve it. That's why it's easier to get the EIN before opening the account — you avoid the hassle later.

Sole proprietors versus other business structures

Sole proprietors — people running a business by themselves with no formal business entity — are the ones most likely to encounter flexibility on the EIN requirement. Banks sometimes treat a sole proprietor as an individual and accept an SSN. However, if you've formed an LLC, S-corp, C-corp, or partnership, banks will require an EIN. Those are separate legal entities, and the bank needs a way to identify them that's distinct from your personal SSN.

If you're unsure whether you've formed a business entity, check with your state's Secretary of State office. Search their website for your business name. If it shows up, you have an entity and you need an EIN. If it doesn't, you're operating as a sole proprietor, and you have more options — though getting an EIN is still the cleaner choice.

Frequently Asked Questions

Can I use a temporary EIN or an EIN application number instead of a real EIN?

No. The IRS does not issue temporary EINs. If you applied online, you received a real, permanent EIN immediately. If you applied by phone or mail, you'll receive a confirmation number that some banks accept temporarily, but you'll eventually need the actual EIN. Banks will not open an account on an application number alone.

What if I'm not sure what business structure I have?

Check your state's Secretary of State website and search for your business name. If it appears, you have a registered entity and need an EIN. If it doesn't appear, you're operating as a sole proprietor. You can still get an EIN as a sole proprietor — it's optional but recommended — and the IRS will issue one with no problem.

Do I need an EIN if I'm just starting out and haven't made any money yet?

No, but the bank will still ask for one. The IRS issues EINs to businesses that haven't started operating yet. There's no waiting period or revenue requirement. Getting one before you open the account is simpler than explaining to the bank why you don't have one yet.

Can my spouse or business partner open the account if I don't have an EIN?

No. The person opening the account needs to provide either an EIN for the business or an SSN for themselves. If the business has multiple owners, the bank will ask for the EIN of the business entity, not the SSN of one owner. Get the EIN first, then either of you can open the account.

What if the bank says it lost my EIN information after I opened the account?

Call the bank and ask them to update your account with your EIN. You'll need to provide it again, and they may ask for a copy of your IRS confirmation letter or the online confirmation page. Keep a copy of your EIN documentation in a safe place so you can provide it quickly if this happens.