You can use your personal bank account for your LLC, but doing so undermines the single biggest reason to form an LLC in the first place: the legal separation between you and the business. Mixing the two sets of money, called commingling, gives courts a reason to strip your personal liability protection, gives the IRS a reason to disallow deductions and add penalties, and creates a bookkeeping mess that costs far more to untangle later than a business checking account costs to open now.
None of the individual transactions are illegal. Depositing a client check into your personal account, paying a vendor with a personal card, covering your home electric bill from business revenue — each is fine on its own. Together they erase the line between you and your LLC, and that line is the entire point of the entity.
What Happens to Your Liability Protection
Most state LLC statutes do not spell out that you must keep a separate bank account. They do require the entity to function independently, and when every dollar flows through an account with your personal name on it, the independence is gone on paper. A creditor’s attorney sees that immediately.
The worst-case outcome is a court piercing the corporate veil. This doctrine lets judges hold LLC owners personally responsible for business debts when the entity is really just an alter ego of the owner rather than a functioning business. Your home, savings, and personal investments become collectible on a judgment against the company.
Commingling funds sits near the top of every list of factors courts weigh, but it rarely stands alone. Judges also look at whether the business was adequately capitalized at formation. An LLC that takes on significant financial risk while funded with almost nothing is treated as an abuse of the entity structure. One frequently cited principle holds that shareholders who provide inadequate capital and actively participate in operations lose the right to hide behind the entity.
In NetJets Aviation, Inc. v. LHC Communications, LLC, the court found that the LLC’s owner frequently withdrew funds for personal use and used company resources for personal travel and personal business, blurring the line between himself and the entity.1Justia. NetJets Aviation, Inc. v. LHC Communications, LLC, No. 06-3340 (2d Cir. 2008)
Your own Operating Agreement matters here too. It frequently requires that company funds be held in a dedicated account, even when state law is silent. Judges look at whether a business followed its own operating procedures when deciding if the entity deserves separate treatment, so violating your own rules hands the other side an easy argument.
The Tax Problems Commingling Creates
Even if a court never touches your veil, the IRS creates its own set of problems when business and personal transactions share an account. Under IRC Section 162, business expenses must be ordinary and necessary to qualify as deductions.2Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses Proving that requires clean records. When an auditor sees hundreds of mixed transactions in one account, every business deduction becomes a fight. If the IRS cannot tell whether a restaurant charge was a client dinner or your anniversary, they will disallow it.
The financial penalty for sloppy records can be steep. IRC Section 6662 imposes an accuracy-related penalty equal to 20 percent of any tax underpayment caused by negligence or a substantial understatement of income.3Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Disallowed deductions increase your taxable income, and the 20 percent penalty stacks on top of the additional tax you already owe. A bookkeeper hired later to reconstruct records from a commingled account will also charge significantly more than one maintaining clean books from the start.
You need to keep statements and receipts long enough to support what you filed. The IRS generally requires records for three years from the filing date. If you underreport gross income by more than 25 percent, the retention period extends to six years. If you never file a return or file a fraudulent one, there is no expiration.4Internal Revenue Service. How Long Should I Keep Records
Paying Yourself Without Commingling
Separating accounts does not trap your money in the business. How you legitimately move profits to your personal account depends on how your LLC is taxed.
Single-Member LLCs
If you are the sole owner and have not elected corporate tax treatment, the IRS treats your LLC as a disregarded entity. You pay yourself through an owner’s draw, a transfer from the business account to your personal account by check or electronic payment. Draws are not subject to income tax withholding at the time of transfer. You report all LLC net income on Schedule C of your personal return and pay self-employment tax on those earnings, regardless of how much you actually withdrew.
Multi-Member LLCs
An LLC with two or more members defaults to partnership tax treatment. The business files Form 1065, and each member receives a Schedule K-1 showing their share of income, deductions, and credits.5Internal Revenue Service. LLC Filing as a Corporation or Partnership Members generally owe self-employment tax on their share of partnership earnings whether or not they take a distribution. The Operating Agreement should spell out how and when distributions happen.
LLCs Taxed as S-Corps
Some LLC owners elect S-corporation tax treatment by filing Form 2553. Under this structure you pay yourself a reasonable salary through payroll, with normal income and payroll tax withholding. Profits above that salary can be distributed without owing the 12.4 percent Social Security portion of self-employment tax, which is why the election appeals to profitable businesses. The trade-off is scrutiny. Setting the salary too low to dodge payroll taxes is one of the most common triggers for an audit of S-corp returns, and the IRS evaluates factors like your training, hours worked, responsibilities, and what comparable positions pay in your area.
Opening a Business Bank Account
Gather these before you apply, whether online or at a branch:
- An Employer Identification Number (EIN). Apply using Form SS-4 through the IRS. The nine-digit number is free, and online applications receive it immediately. A single-member LLC without employees can technically use the owner’s Social Security number, but IRS instructions advise against substituting one for the other, and banks strongly prefer an EIN for business accounts.6Internal Revenue Service. About Form SS-4, Application for Employer Identification Number (EIN)7Internal Revenue Service. Instructions for Form SS-4 (Rev. December 2025)
- A certified copy of your Articles of Organization. If you do not have one, request it from your Secretary of State’s office.
- Your Operating Agreement. Banks use it to verify who has authority over the account, and most will ask for one even in states that do not require it.
- A banking resolution for multi-member LLCs, naming the individuals authorized to open accounts, sign checks, and initiate transfers.
- Government-issued ID for every authorized signer.
With documents ready, an online application takes roughly 20 minutes. After the bank reviews your Articles of Organization and verifies the LLC’s standing, you make an initial deposit and receive your account number and business debit card. Activation typically takes one to three business days. Route all business revenue there immediately and link the account to your accounting software so transactions categorize automatically.
If You’ve Already Been Commingling
The fix is not complicated, but it needs to happen now rather than later. Open a dedicated business account, then transfer any business funds currently sitting in your personal account as a single, clearly labeled contribution to the LLC.
Then go back through your personal bank statements and identify every business transaction. Categorize each as income, expense, or owner’s draw. The reconstruction is tedious, but it creates the paper trail you need if the IRS audits a prior year or a creditor challenges your entity’s legitimacy. Keep those reconstructed records for at least three years from the filing date of the relevant return, or six years if income might have been underreported by more than 25 percent.4Internal Revenue Service. How Long Should I Keep Records
From that point on, run every dollar of business income into the business account and pay every business expense out of it. Move money to yourself through documented owner’s draws or payroll, depending on your tax election. The longer your track record of clean separation, the harder it becomes for anyone to argue your LLC is just a shell.