Open a dedicated business bank account. This is the foundation of separating finances. Every dollar that comes into the business should flow through this account, and every business expense should be paid from it. Most banks offer free or low-cost business checking for small businesses, so cost shouldn’t be a barrier to getting started.

Get a business credit card tied to the business. Using a personal credit card for business purchases makes tracking difficult and creates problems at tax time. A dedicated business card keeps all transactions in one place and builds business credit history that can help with financing later.

Pay yourself through a formal process rather than just spending business money on personal things. If you’re a sole proprietor or single-member LLC, take owner’s draws from the business account to your personal account. If you’re an S-corp, you need to pay yourself a reasonable salary through payroll. Either way, the transfer should be documented and consistent. Pulling random amounts whenever you need cash makes your books impossible to reconcile.

Stop paying for business expenses with personal funds. Every time you swipe your personal card for office supplies or gas for a work trip, you create a transaction that has to be tracked and reimbursed. If you must use personal funds in a pinch, reimburse yourself from the business account with a clear memo describing what it was for.

Keep personal purchases completely out of the business account. No groceries, no clothes, no streaming subscriptions. Even if you plan to code them as owner’s draw later, mixing transactions creates confusion and audit risk. The cleaner your accounts, the easier your bookkeeping.

Track everything from day one. Monthly bookkeeping that’s accurate depends on clean source data. When personal and business transactions are mixed in the same accounts, your bookkeeper has to sort through every line item asking whether it was personal or business. That costs you time and money.

The IRS looks closely at businesses that blur personal and business finances. If you’re ever audited, mixed finances make it harder to prove which expenses were legitimate business deductions. Clean separation protects your deductions and makes the whole process less stressful.

If you’ve been mixing finances and need help cleaning things up, that’s a common starting point for many clients at our Los Angeles small business bookkeeping practice. The fix usually involves catching up the books, properly categorizing past transactions, and setting up systems that keep things separate going forward.