What is Contribution Margin? — Definition for DTC operators

Definition

Contribution margin is revenue minus all variable costs to deliver that revenue — COGS, payment processing, fulfillment, last-mile shipping, and the specific marketing spend that produced the order. What remains is the dollar amount available to cover fixed costs (rent, salaries, software) and profit.

How operators actually use it

Contribution margin per order, not ROAS, is the metric serious DTC operators run their business by. A brand with $80 AOV, $25 COGS, $10 fulfillment, $3 payment fees, and $30 CAC has $12 contribution per order. Multiply by order volume and you have the true profit-fuel for the brand. When agencies report 'ROAS' without contribution, they are hiding whether your growth is actually funding the business.

Common pitfalls and honest-cost notes

The most common error is forgetting to include returns-and-refund costs (refunded order = negative contribution including return shipping), or treating subscription revenue as upfront contribution when half the customers churn before payback. A real CM model handles refund rate and cohort churn — anything less is wishful thinking.

Related terms

Gross Margin — Gross margin is revenue minus cost of goods sold (COGS), expressed as a percentage of revenue.
CAC (Customer Acquisition Cost) — CAC is the total cost to acquire a new customer, calculated as marketing spend divided by new customers acquired in the same window.
LTV (Lifetime Value) — LTV is the projected total revenue a customer will generate over their relationship with your brand.
Payback Period — Payback period is the number of days or months it takes for the contribution margin from a customer cohort to fully cover the CAC spent to acquire that cohort.
Blended CAC — Blended CAC is total marketing spend divided by total new customers, regardless of whether each customer was attributed to a paid source.