How to Open a Business Bank Account: What Banks Ask For, and Why

Running business income and expenses through a personal account might feel harmless, especially early on, but it undermines the exact protection an entity exists to provide. Commingling funds — mixing personal and business money in one account — is one of the clearest signals a court looks for when deciding whether to disregard an LLC's or corporation's liability shield in a dispute. A dedicated business account isn't just cleaner bookkeeping; it's evidence, if it's ever needed, that the business is actually being run as a separate entity rather than as an extension of the owner's personal finances.

It also makes everything else easier

Beyond the legal reasoning, a separate account is simply what makes bookkeeping, tax preparation, and eventually financing possible without hours of manually sorting personal charges from business ones after the fact.

Lenders and investors expect to see it too

Anyone evaluating the business later — a lender reviewing a loan application, an investor doing diligence, an accountant reconstructing a year of activity — expects clean, separate business banking as a baseline sign the entity is actually run as its own operation. A history of mixed personal and business transactions is, at minimum, extra work to untangle, and at worst, a red flag about how carefully the entity has been maintained.

The exact list varies by bank, but most business accounts require the same core set of documents:

• Proof the entity legally exists — your approved formation document, discussed below
• An EIN — the entity's federal tax identification number, in almost every case
• Identification for every authorized signer — government-issued ID for each person who will have access to the account
• A banking resolution or authorization — documentation of who, specifically, is allowed to open and manage the account on the entity's behalf

Some banks also ask for a Certificate of Good Standing confirming the entity is currently compliant with the state, particularly for entities that have been active for a while or for larger commercial accounts. This guide explains what that certificate actually is and why a bank might request one.

A bank's first question is fundamentally the same one the state answers at formation: does this entity actually exist? The approved formation document — Articles of Organization for an LLC, Articles of Incorporation for a corporation, or the equivalent for other entity types — is the proof. Banks typically want the state-stamped or state-approved version, not just the draft that was submitted, since the approval is what confirms the entity is officially on the record.

Certified copies, sometimes

For some banks, particularly with larger commercial relationships, a certified copy from the state — an officially reissued version bearing the state's seal, obtained after the original approval — is requested instead of the standard approval copy. It's worth asking your bank in advance which version they actually need, rather than assuming the original approval document is sufficient.

Corporations often need one more layer

A corporation opening its first account may also be asked for evidence of its initial board action authorizing the account — not because the formation document is insufficient, but because a corporation's more formal governance structure means the bank wants to see that the board, not just an individual officer, actually approved opening it.

Nearly every bank requires an EIN to open a business account, even for a single-member LLC that could technically use the owner's Social Security Number for federal tax purposes. Using an EIN instead keeps the business's financial identity cleanly separate from the owner's personal one — which, again, supports the liability separation the entity was formed to create. This guide to getting an EIN covers how to get one directly from the IRS at no cost, and why it's worth doing before you show up at the bank rather than during the appointment.

A banking resolution is an internal document authorizing specific named individuals to open, manage, and transact on a business account. For a corporation, this typically takes the form of a formal board resolution, adopted and documented the way the bylaws require. For an LLC, it's often simpler — sometimes built into the operating agreement itself, sometimes a standalone authorization signed by the members — but banks generally still want some documented proof of who has authority, rather than taking a signer's word for it.

Why the bank insists on this, specifically

The bank is protecting itself as much as it's protecting you: if a dispute ever arises over who was authorized to move money, the bank needs its own paper trail showing it acted on documented authority, not just on the say-so of whoever walked in. This guide to governing documents covers where banking authorization typically fits inside an operating agreement or bylaws.

Banks are strict about one thing above almost everything else: the account name has to match either the entity's exact legal name as filed with the state, or a properly registered DBA if the business operates publicly under a different name. A mismatch — even a small one, like a missing "LLC" or a different capitalization the bank's system treats as significant — is one of the most common reasons an account opening gets delayed or rejected outright. This guide to DBAs vs. legal entity names explains why a business might legitimately want to bank or brand under a name that differs from its formal legal one, and what has to be filed to do that properly.

Most delays come from missing or mismatched paperwork discovered mid-appointment rather than from anything genuinely complicated. Before you go:

1. Confirm your formation is fully approved — not just submitted — and bring the state-approved copy.

2. Have your EIN confirmation letter in hand, not just the number written down from memory.

3. Prepare your banking resolution or authorization, matching exactly who the operating agreement or bylaws say is authorized to act for the entity.

4. Bring ID for every signer who will have access to the account, not just the primary owner.

5. Double-check the exact legal name you're opening the account under against your formation document, character for character — including punctuation, spacing, and the required entity designator.

Calling ahead to confirm the specific bank's document list before the appointment is a small step that avoids most of the friction — requirements vary enough between institutions that assuming one bank's list matches another's is a common, avoidable mistake.

Where to open it

National banks, regional and community banks, and business-focused fintech platforms all offer business accounts, and each comes with its own trade-offs around fees, in-person branch access, and integration with accounting software. None of that changes the underlying document requirements above — every one of these options is still verifying the same basic facts about the entity before opening the account.