Yes, absolutely. Separating business and personal finances is critical for:

Legal protection: Maintains LLC/corporation liability protection. Mixing funds can “pierce the corporate veil” and expose personal assets.

Tax compliance: Makes deductions easier to track and defend in an audit. IRS red flag if personal and business are mixed.

Accurate bookkeeping: Impossible to maintain clean books when transactions are mixed. Saves hours of sorting and categorization.

Professional credibility: Business checks and cards look more professional to clients and vendors.

Loan applications: Banks require separate business accounts and won’t approve loans without them.

Best practice: Open a business checking account immediately upon starting your business, even as a sole proprietor.