Profit Leak Self-Check

WhyEvery margin figure inherits this number. If it's a guess, every pricing decision built on it is too.

WhyRevenue can grow while each order loses money. Contribution margin is what's left to pay for marketing and overheads.

WhyBest sellers by revenue are often not the best earners once discounts and shipping are counted.

WhyA sale that doubles revenue at half the margin, mostly to customers who'd have bought anyway, can lose money.

WhyLeaked codes turn a targeted offer into a permanent price cut.

WhyFree or flat-rate shipping is a marketing cost. It should be a deliberate one, measured like any other.

WhySet too low, it gives margin away; set too high, nobody reaches it and it stops working.

WhyRepeat purchase decides how much you can afford to pay to acquire a customer in the first place.

WhyOne product with a sizing problem can erase the margin of several good ones.

WhyEach chargeback costs the order, the fee and your time — and card networks act against stores whose rate climbs too high.

WhyThey need opposite fixes — payment retries and card updates versus product and offer changes.