You open your bank statement and there it is again — a wall of small charges. $29 here. $49 there. $15 for something you don't even remember signing up for. None of them look like a big deal on their own. But add them up, and a lot of small business owners are quietly bleeding money through the same handful of blind spots, month after month. It's not one big mistake. It's a dozen small, reasonable-sounding decisions that stack up until they're eating real margin — without you

Most business owners have no idea what credit card processing fees are really costing them. Here's the real math behind interchange, assessment fees, and processor markup — plus what a tire shop taught me about deciding whether to pass those fees on to customers.