Article

Contribution Margin Formula for Ecommerce (With Real Examples)

StoreHero · storehero.ai Free Intermediate

The best worked-example explainer for actually doing the math: Net Sales minus product cost, shipping, payment fees, fulfilment and allocated ad spend, computed across orders and SKUs. It shows you the arithmetic rather than just defining the term.

  • Contribution margin = Net Sales - Product Cost - Shipping - Payment Fees - Fulfilment - Allocated Ad Spend.
  • Allocating ad spend to orders is where most brands' contribution margin quietly turns negative.
  • SKU-level contribution margin reveals which products can carry ad spend and which can't.
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It answers 2 questions

  1. What is contribution margin for a D2C brand, and what do CM1, CM2 and CM3 mean?
  2. How do I factor RTO, returns, COD, shipping and discounts into my true margin?

Read with it

  1. A reference list broader than just CM1/CM2, useful once you've got the basics down and want to know what an actual CFO would... CFO Matrix Article D2C Unit Economics: 16 Metrics Every E-commerce Startup Should Know CFO Matrix
  2. A data-backed benchmark from 410M+ shipments across 6,000+ brands, the closest thing to an industry yardstick for where your... Unicommerce Report India D2C Report 2026: Operations, RTO & Growth Data Unicommerce
  3. The cleanest plain-English starting point from the platform most Indian D2C brands actually run on. It nails the core idea -... shopify.com Article What Is Contribution Margin? Definition and Guide Shopify
  4. Video Contribution Margin - CM1, CM2, CM3 | Startup Sarthak Ahuja
  5. The most concrete India-specific breakdown of what a returned COD order actually costs - forward + reverse shipping, packaging,... hillteck.com Tool True Cost of RTO for Indian D2C Brands: Formula + Calculator HillTeck
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