How to open a business bank account for an LLC
An LLC needs its own business bank account because mixing business and personal money, called "commingling," is the single most common reason courts pierce the corporate veil and hold the owner personally liable for business debts. To open one, bring your EIN, Articles of Organization (your state's proof the LLC exists), your operating agreement, and a government-issued ID. Beyond that, compare monthly fees, minimum-balance requirements, and transaction limits, since those vary bank to bank and the SBA does not set them.
Do I need a separate bank account for my LLC?
Yes. An LLC (limited liability company) exists specifically to put a legal wall between your personal assets and your business's debts and lawsuits. That wall only holds up if you actually treat the LLC as a separate entity, and a separate bank account is the clearest evidence of that. The Small Business Administration puts it plainly: "Business banking offers limited personal liability protection by keeping your business funds separate from your personal funds." Run business income and expenses through your personal checking account instead, and you undercut the exact protection the LLC was formed to give you.
What happens if I mix personal and business money?
You risk "piercing the corporate veil," the legal process by which a court sets aside an LLC's or corporation's liability shield and holds the owner personally responsible for the business's debts. Cornell Law School's Legal Information Institute defines it as courts holding owners "personally liable for the corporation's actions or debts" when the entity has been abused, and it names "intermingling of personal and corporate assets" as a specific factor courts look at. In practice, that means if you get sued or a creditor comes after the business and your bank records show your rent, groceries, and business invoices all running through one account, a court has grounds to treat you and the LLC as the same thing and reach your personal savings, car, or house.
Courts do not pierce the veil for a single sloppy transaction. It takes a pattern: no separate account, no separate bookkeeping, personal and business funds routinely mixed, business formalities ignored. A business bank account, used consistently, is the easiest single habit that keeps that pattern from ever forming.
What documents do I need to open a business bank account?
Banks vary on the fine print, but the SBA's own guidance and standard bank practice converge on the same core set. Have these ready before you walk in or start an online application.
| Document | Why the bank wants it |
|---|---|
| EIN (Employer Identification Number) | Your federal tax ID for the business. Nearly every bank requires it for an LLC, even a single-member LLC that could technically use the owner's Social Security number instead. Get one free directly from the IRS, never from a paid service. |
| Articles of Organization (or Certificate of Formation) | The document your state's Secretary of State issued when you formed the LLC. It proves the entity legally exists. |
| Operating agreement | Your internal document naming the owners (members) and how the LLC is managed. Multi-member LLCs are asked for this almost universally; some banks want it even for a single-member LLC. |
| Government-issued photo ID | A driver's license or passport for each person who will be a signer on the account, to verify identity under federal banking rules. |
| Business license (if your city or state requires one) | Proof you are authorized to operate, if your industry or location requires a license. |
| DBA / fictitious name certificate (if applicable) | Only needed if the LLC operates under a name different from the one on its Articles of Organization. |
Source: U.S. Small Business Administration, "Open a business bank account."
If you have not formed the LLC yet or do not have an EIN, do those first. For the state filing steps, see how to form an LLC; for the EIN, see how to get an EIN free from the IRS. Both are prerequisites the bank will ask for, not optional extras.
What should I compare between business bank accounts?
The SBA does not recommend specific banks, and neither do we here. What it does tell you to compare is the fee structure, because that is where accounts actually differ. Before you pick one, check each of these against your own expected activity.
| Factor | Why it matters |
|---|---|
| Monthly maintenance fee | Some accounts charge a flat fee unless you meet a balance or activity minimum. Ask what waives it. |
| Minimum balance requirement | Falling below it can trigger the monthly fee or, in some cases, a separate penalty. |
| Transaction limits | Many business checking accounts cap free transactions (deposits, withdrawals, transfers) per month, then charge per transaction after that. Match this to your expected volume. |
| Cash deposit limits | Accounts that handle cash-heavy businesses often cap free cash deposits per month before charging a per-dollar fee. |
| ACH and wire fees | Relevant if you pay vendors, contractors, or payroll by bank transfer. |
| Introductory offers and interest rates | Some accounts offer a signup bonus or pay interest on balances; both are worth weighing but should not outweigh the fee structure above. |
Source: U.S. Small Business Administration, "Open a business bank account."
What is the difference between a business checking account and a personal one?
Functionally, both let you deposit money, write checks, and use a debit card. The differences are in who can use it, what it is meant for, and what protects it. A business account is opened in the LLC's name using its EIN, and its ownership and authorized signers are tied to the formation documents and operating agreement rather than to one individual. It is meant to hold only business income and pay only business expenses, which is what keeps the liability separation described above intact. Business accounts also commonly carry different fee structures (transaction and cash-deposit limits that personal accounts do not have), and some come bundled with services personal accounts do not, like merchant payment processing or multiple authorized users tied to different roles.
One protection is identical either way: FDIC deposit insurance. The Federal Deposit Insurance Corporation insures deposits at member banks up to $250,000 per depositor, per insured bank, per ownership category. A business account is its own ownership category, separate from an owner's personal accounts at the same bank, which is one more reason keeping the two apart is worth doing even before liability is considered.
Can I just use my personal bank account for my LLC?
You can, technically, in the sense that no bank or government agency stops you from depositing a client's check into your personal checking account. But doing so is exactly the commingling that puts your liability shield at risk, and it also makes ordinary bookkeeping and tax prep much harder: every personal grocery run and every business expense lands in the same statement, and you (or your accountant) have to untangle it line by line at tax time. A dedicated business account, used exclusively for business money in and business money out, keeps the two separate automatically and gives you a clean paper trail if the IRS or a court ever needs one.
The flat truth: the account is cheap insurance for the protection you already paid for
You already paid a state filing fee to get the LLC's liability protection. A business bank account is the low-cost habit that keeps that protection from evaporating the first time someone examines your finances closely, whether that is a lawsuit, a creditor, or an IRS audit. Bring the EIN, the Articles of Organization, the operating agreement, and an ID, pick an account based on the fees and limits that match how you actually use it, and never run business money through your personal account again.
Sources
- Documents needed, fee factors to compare, and "business banking offers limited personal liability protection by keeping your business funds separate from your personal funds": U.S. Small Business Administration, "Open a business bank account".
- Definition of piercing the corporate veil and commingling of assets as a factor courts consider: Cornell Law School, Legal Information Institute, "Piercing the corporate veil".
- FDIC standard deposit insurance amount ($250,000 per depositor, per insured bank, per ownership category): FDIC, Deposit Insurance FAQs.
- EIN requirement and free IRS application: IRS, Apply for an EIN online.