Contribution Margin 1, 2, 3

A layered contribution margin analysis: CM1 (Revenue minus COGS), CM2 (CM1 minus fulfillment), CM3 (CM2 minus marketing).

1 min readLast updated Apr 2026

Reviewed by Golden Digital·Operator-reviewed ecommerce reference

Quick Reference

CategoryCore Metrics & KPIs

A layered contribution margin analysis: CM1 (Revenue minus COGS), CM2 (CM1 minus fulfillment), CM3 (CM2 minus marketing).

Why It Matters

The CM1/CM2/CM3 framework reveals exactly where your money goes at each stage of the order. This layered view shows whether you have a product cost problem (low CM1), fulfillment inefficiency (CM2 drop), or marketing efficiency issue (CM3 collapse). It's the diagnostic tool for pinpointing profitability leaks.

Practical Example

Scenario

A $100 AOV apparel brand tracks: COGS $35, fulfillment $12 (pick/pack + shipping), marketing $25 (CAC allocated per order).

Calculation

CM1 = $100 - $35 = $65 (65%) | CM2 = $65 - $12 = $53 (53%) | CM3 = $53 - $25 = $28 (28%)

Result

Each layer reveals health: 65% CM1 is excellent product margin, 53% CM2 shows moderate fulfillment impact, and 28% CM3 indicates room to optimize marketing or scale volume to improve profitability.

In-Depth Explanation

This breakdown identifies exactly where profitability is gained or lost across the value chain.

Pro Tips

1Benchmark each layer independently. CM1 issues require supplier negotiation; CM2 issues need fulfillment optimization; CM3 issues demand marketing efficiency.
2Track CM2 changes during peak seasons. Carrier surcharges and expedited shipping can crush CM2 during holidays.
3Use CM3 to evaluate channel profitability. Email-driven orders often show 40%+ CM3 while paid social might be 15-20%.
4Model the impact of free shipping on CM2. Moving threshold from $50 to $75 might improve CM2 by 3-5 points.

Common Mistakes to Avoid

Stopping at CM1 (gross margin) and declaring the business healthy without accounting for fulfillment and marketing costs.

Allocating marketing costs equally across all orders when new customer orders have much higher marketing cost than repeat orders.

Ignoring the relationship between layers. Cheap products (low CM1) might convert better and require less marketing (higher CM3).

Frequently asked questions

All three matter, but for D2C brands, CM3 is the ultimate health check—it's what's left after all variable costs. CM1 and CM2 help diagnose where to improve if CM3 is weak.

Most common method: CAC / average orders per customer = marketing cost per order. For repeat customers, use only the cost of retention marketing (email, SMS) not acquisition costs.

15-25% is typical for D2C brands with paid acquisition. 25-35% is strong. Above 35% often means you're underinvesting in growth. Subscription brands can hit 40%+ after initial acquisition costs are recovered.

Put it to work

Related Terms

Contribution MarginCM

The profit earned on each unit sold after deducting all variable costs.

Gross Margin

The percentage of revenue remaining after subtracting the cost of goods sold (COGS).

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