Using a personal card for everything. I get it. When you're first starting out, it's easy to swipe the same card for a client lunch, office supplies, and groceries. But that convenience can create a lot of confusion later. Here's the problem: if the IRS ever questions a deduction, "I'm pretty sure that was for the business" isn't proof. You need records that clearly separate business expenses from personal spending. A few signs this might be you: You're still running the business out of your first personal checking account. You don't have a dedicated business credit card or bank account. Tax season means digging through statements trying to remember what was business and what wasn't. Your bookkeeping feels more like detective work than recordkeeping. The fix doesn't have to be complicated — it just takes a little structure. Opening a separate business bank account and using a dedicated business card can make bookkeeping easier, help you understand your numbers, and create a cleaner paper trail if questions ever arise. Let's talk about it. Are your business and personal finances completely separate, or is this an area you're still working on?