Summit CPA Review
BAR Cost Accounting · Updated November 2026

Contribution Margin vs Gross Margin: Why Are They Not the Same Profit Measure?

Gross margin follows financial-statement cost classification. Contribution margin follows cost behavior.

Gross margin

Sales minus cost of goods sold equals gross margin. COGS under absorption accounting can include both variable and fixed manufacturing costs.

Contribution margin

Sales minus variable costs equals contribution margin, showing how much remains to cover fixed costs and profit.

Why it matters

Contribution margin is central to CVP, break-even, special-order, and short-term decision analysis.

Common trap

Do not assume every cost below gross margin is fixed or every cost inside COGS is variable.

The takeaway

Gross margin subtracts cost of goods sold. Contribution margin subtracts variable costs.

Related Summit guides

Absorption vs variable costingContinue with a related Summit CPA Review guide.CVPContinue with a related Summit CPA Review guide.Relevant costsContinue with a related Summit CPA Review guide.

FAQ

Is gross margin the same as contribution margin?

No.

Does contribution margin subtract variable selling costs?

Yes when they are part of the relevant variable-cost structure.

Is contribution margin useful for break-even analysis?

Yes.