Unit Economics
What Is CM3? (Contribution Margin After Marketing)
CM3 (Contribution Margin 3) is CM2 minus variable marketing spend per order, the final unit-level number showing what each order contributes after COGS, fulfillment, and acquisition cost are all paid. A positive CM3 means the unit economics work and the order funds fixed costs and profit. A negative CM3 means every order makes the brand poorer. Composite 2026 ranges run from 4 to 14 percent for food and beverage DTC up to 22 to 34 percent for subscription consumables.
Contribution Margin 3 (CM3) is CM2 minus your variable marketing spend per order. It's the final unit-level number — what each order actually contributes to fixed costs and profit AFTER all variable costs (COGS, fulfillment, AND marketing) have been paid. If CM3 is positive, the unit economics work. If CM3 is negative, every order makes you poorer.
How CM3 is calculated
CM3 (dollars) = CM2 (dollars) minus Variable Marketing per Order.
CM3 (percent) = CM3 dollars divided by Revenue, times 100.
Variable marketing = paid acquisition spend (Meta, Google, TikTok, Pinterest, affiliate commissions, CPA-based influencer payments) divided by orders attributed to those channels. Marketing payroll, ad-management software, and brand TV are not variable — they sit below CM3 in operating expenses.
A worked example
Same DTC beauty brand from the CM1 and CM2 examples. CM2 was $51.68 per $80 serum. Last month the brand spent $34,000 on Meta and Google and acquired 1,200 paid orders, so paid CAC was $28.33 per order. CM3 = $51.68 − $28.33 = $23.35, or 29.2 percent. That $23.35 is what funds fixed costs (rent, payroll, software). Whatever's left after fixed costs is profit.
What's a good CM3?
Vertical-dependent. CM3 is where the gap between CM2 and reality shows up — strong brands with disciplined acquisition keep CM3 high; brands burning ad dollars at break-even collapse it. Composite 2026 ranges:
- Beauty / personal care DTC: 18 to 28 percent
- Apparel DTC: 10 to 22 percent
- Outdoor / hardgoods DTC: 14 to 24 percent
- Food and beverage DTC: 4 to 14 percent
- Subscription consumables: 22 to 34 percent
- CPG (wholesale-heavy): 8 to 18 percent
For the cross-vertical view, see average contribution margin by vertical.
The most common mistake
Lumping fixed marketing into CM3. Marketing payroll, ad-management software, and brand TV are operating costs — they belong below CM3 on the P&L, not inside it. Putting them in CM3 understates the metric and triggers the wrong decision: founders cut paid ads to "fix" a CM3 number that was actually being dragged down by fixed marketing overhead. Keep CM3 strictly variable.
CM3 is what's left after acquisition cost hits CM2. For the full framework on the CM1 → CM2 → CM3 ladder, why CM3 lags CM2 by 10-25 points across the Eightx portfolio, and how to use it for channel-mix decisions, see our contribution margin pillar.
Frequently Asked Questions
what counts as variable marketing in cm3?
Performance ads directly tied to acquisition (Meta, Google, TikTok, Pinterest), Cost Per Acquisition (CPA) based influencer payments, and affiliate commissions. NOT variable: marketing payroll, ad-management software, brand TV, podcast sponsorships. Those are fixed and sit below CM3.
why is cm3 so much lower than gross margin?
Because CM3 subtracts everything between revenue and operating expenses (COGS, fulfillment, payment processing, returns reserve, AND variable marketing). Gross margin only subtracts COGS. On a typical DTC P&L the gap is 25 to 45 percentage points, and that gap is exactly what makes a business look profitable on paper while burning cash in practice.
cm3 vs cm2, what's the difference?
CM2 is the maximum allowable CAC (the ceiling, set before marketing spend). CM3 is what is actually left after you spend on marketing — the contribution to fixed costs and profit. Both matter, for different decisions: CM2 sets the spend limit, CM3 reports the result.
what's a healthy cm3 for a DTC brand?
Vertical-dependent. Beauty DTC 18 to 28 percent, apparel DTC 10 to 22 percent, food and beverage DTC 4 to 14 percent. Below the floor of your vertical means either CM2 is weak (cost structure) or paid CAC is too high (acquisition discipline). Above the ceiling means your premium positioning + acquisition mix is actually working.
Related Terms
- What is CM1?
- What is CM2?
- What is CAC?
- What is LTV:CAC ratio?
- Contribution margin calculator + complete guide
Browse the full ecommerce finance glossary for every metric and money term a DTC operator needs.
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