Not all revenue is equal, and the channel through which a sale occurs determines how much of the transaction price the business retains. Digital orders carry fulfillment costs that in-store transactions do not: picking, packing, last-mile delivery, and a materially higher rate of returns processing. When these costs are absorbed into a shared cost pool rather than allocated to the channel generating them, the digital channel appears more profitable than it is, and the physical channel appears less profitable than it is.

As the proportion of digital transactions increases, the blended margin across the business declines even when individual product margins hold steady. Retailers that have grown digital revenue without restructuring their cost allocation are carrying a margin dilution that is invisible in standard reporting but visible in the gap between gross profit and operating cash generation. Correcting this requires calculating contribution margin by channel, which is a foundational step in any credible retail profit recovery program.

Digital channels generate return rates that run significantly higher than physical store transactions, and the cost of processing those returns is rarely allocated back to the channel that created them. A customer who purchases online and returns in-store consumes store labor, occupies floor space, and disrupts inventory planning, but the cost appears in store operations rather than in the digital channel's performance metrics.

This asymmetry systematically understates the true cost of digital volume and overstates the profitability of the online channel relative to physical retail. When retailers make channel investment decisions based on these distorted metrics, they allocate more capital to the channel that appears most profitable rather than the channel that generates the most cash per transaction. Resolving the distortion is directly connected to the broader challenge of managing the omnichannel returns labor penalty that compounds store-level cost pressure across the network.