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DTC Commerce Lab

How do you calculate order contribution margin without hiding service costs?

Author: DTC Commerce Lab · Editorial team · Updated: 2026-10-06

Who this guide helps

DTC operators reviewing economics

The short answer

Subtract variable order costs from net order revenue using a consistent definition. Contribution margin is not company profit because fixed and other costs may remain.

Practical workflow

In an illustrative order, revenue after discounts is 100 units. Product cost is 45, fulfillment 10, payment fees 3 and variable support or return allowance 7; the subtotal contribution is 35. Add acquisition cost separately if your definition includes it. Use your own verified figures and avoid mixing tax collections with revenue.

What a useful handoff looks like

Compare scenarios with different return or delivery costs. State whether acquisition, taxes and fixed overhead are included. Reconcile actual transactions to your accounting process before using the result operationally.

Mistakes to avoid

Do not advertise these invented inputs as market benchmarks or confuse a positive order contribution with overall profitability.

Working example: fields to record

FieldIllustrative entry — replace with your own facts
Revenue basisNet of actual discounts
Variable costVerified fulfillment or payment fee
Excluded itemFixed overhead explicitly stated

Add your own entries; the example is illustrative. Keep sensitive information private.

Download the blank worksheet

Sources & further checks

Official references are starting points for further checks, not approval of a specific case, product or project.

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