E-commerce earnings quality

E-commerce contribution margin: the number buyers should rebuild before valuation

Published August 31, 2026 · Reviewed by The Diligence Standard Team · Updated September 11, 2026

A practical bridge from revenue to cash contribution after product, freight, platform fees, advertising, creator commissions, fulfillment, returns and refunds.

This guide is organized around the evidence a buyer or seller should be able to reconcile before relying on a transaction claim.