Skumargin

DTC founders can see sales while still missing whether an individual SKU contributes cash after import duty, freight, fulfillment, payment fees, returns and shared software costs. The supplied research confirms adjacent profit-analytics products but found no reviewed small-business product making tariff classification and duty overlays first-class inputs. It also reports that changes to low-value import treatment increased duty exposure. That supports a workflow gap, not a universal duty or disclosure conclusion.

A SKU description cannot determine tariff classification, origin, customs value or duty owed. Those depend on facts, current schedules, entry records and qualified interpretation. Estimated duty is not duty assessed or paid. Freight and shared costs require explicit allocation rules; refunds, exchanges, inventory timing and channel attribution can move margin across periods. A scenario is not a forecast, and a calculated margin is not an accounting or customs filing.

SKU identity, product fact, classification candidate, approved classification, customs entry, assessed duty, paid duty, carrier invoice, fulfillment charge, order line, payment fee, return, allocation rule, margin view and business decision are separate. Skumargin should reconcile evidence and show uncertainty while leaving customs, accounting and pricing authority with qualified people.

A DTC founder, finance lead or operations manager at a small importing brand with multiple SKUs and fragmented order, customs, logistics and return records.