If you’re still reconciling inventory across channels by hand, spreadsheets, end-of-day counts, a mental note to “check that later”, you already have a sense that it’s costing you something. What you probably don’t have is a number. That’s the hidden cost of manual inventory tracking: it never shows up as a line item. It’s ten minutes here, a missed update there, a customer service call to smooth over an oversold item, the everyday risk of running multichannel inventory management off spreadsheets. None of it looks like an expense until you add it up, and almost nobody does. Key Takeaways 📋 Table