Do I need a separate business bank account?

Yes. A separate business bank account is one of those rare things that is simultaneously required by law in many cases, free to set up, and a massive timesaver for taxes.

If you have an LLC or corporation, it isn’t optional. Mixing personal and business money in an LLC is called “commingling,” and courts can pierce the corporate veil and hold you personally liable for business debts — exactly what the LLC was supposed to prevent. Most banks require a separate account at account opening for that reason.

If you’re a sole proprietor, it’s still worth it. You aren’t legally required to keep separate accounts, but you should anyway because:

• Tax prep. Instead of sorting through 18 months of personal-bank statements to find the $4,300 in business expenses, you hand your accountant one statement.
• Audit defense. If the IRS ever asks questions, a clean business account is your best evidence that personal expenses weren’t deducted as business ones.
• Cash flow clarity. Knowing your actual business balance at a glance is something most new owners wish they had set up sooner.

What you need to open one:

• An EIN. Free from the IRS at irs.gov/ein. Takes about 10 minutes.
• Your formation documents. Articles of Organization for an LLC, articles of incorporation for a corporation. Sole proprietors without an LLC can usually open a business account with their EIN and a DBA (“doing business as”) filing if their state requires one.
• A government ID. Same as a personal account.

What kind of account to open:

• A business checking account is the core. Most banks offer them with no monthly fee if you keep a low minimum balance (often $1,500 or less) or use direct deposit.
• A business savings account is optional but useful for tax set-asides — moving 25–30% of every deposit into a separate savings account removes the “I don’t have the money to pay taxes” surprise.
• A business credit card is a separate question; the short answer is yes, you want one to keep expenses cleanly separated and to build business credit.

Common mistakes to avoid:

• Paying personal expenses from the business account (even temporarily).
• Using the business account as your personal ATM.
• Opening the account before you have your EIN — banks will reject the application.

It usually takes less than an hour at a local branch and costs nothing. Do it in the first week you start taking business income.