Up to 38% of an online store's revenue can be silently drained away by hidden costs. I heard Scott Brandley and DJ Sprague discuss this figure on an episode of Ecommerce Coffee Break, and it completely reframes how to think about profitability. This isn't a single, obvious expense line on your P&L. Instead, it’s the combined effect of many small, often overlooked, revenue leaks. These are things like excessive product returns, high payment processing fees, unnecessary cart abandonment, and legitimate orders being incorrectly flagged as fraud.
Brandley and Sprague argue that most founders are so focused on driving traffic that they miss the chance to fix these foundational leaks. The strategy they propose to fix this is a concept they call cash flow stacking. In another conversation on Firing The Man, they explained that it's about systematically addressing these issues in a specific order, creating a compounding positive effect. You aren't just plugging one hole. You’re using the cash freed up from fixing the first leak to help you fix the second, and so on. It’s a powerful engine for self-funded growth.
The 'stacking' part is important because, as they say, "small problems become big problems when you scale." A 3% profit leak from returns might seem manageable at $500k in revenue, but it becomes a massive cash drain at $5 million. By stacking solutions, you’re not just recovering lost margin. You're improving your cash conversion cycle, which lets you buy more inventory, fund more marketing, and grow faster and more profitably. Fixing a return issue might improve margins by 2%, while optimizing payment fees might add another 1%. That 3% gain isn't just a one-time boost, it's cash that cycles back into the business month after month.
While the 38% figure represents a business with significant issues across the board, every store has these leaks. The path to better Profit Margin Optimization starts by looking for them. Instead of focusing only on top-line growth, this strategy forces you to build a more resilient and efficient business from the ground up.
