What is contribution margin and why does it

2 min read

Price − variableHow it's built

Covers fixed costsWhat it does

Drives break-evenWhy it matters

What it means

Contribution margin is what's left from each sale after its variable costs. That contribution first covers your fixed costs; once they're covered, further contribution is profit. It differs from gross margin by focusing on variable cost per unit, which is exactly what matters for pricing and volume decisions. Calculate it with the contribution-margin calculator.

Why it matters for your company

Contribution margin sets your break-even point: fixed costs divided by contribution per unit is how many you must sell. It also tells you whether a discount or a new low-price line actually pays — if a sale's contribution is positive it still helps cover fixed costs, but a sale below variable cost loses money every time. Use it before agreeing volume discounts.

What it means for you

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Frequently asked questions

Is contribution margin the same as gross margin?

Close but not identical. Gross margin deducts cost of goods sold; contribution margin deducts all variable costs per unit. Contribution margin is the sharper tool for pricing, discounting and break-even decisions.

Why does contribution margin matter for discounts?

Because a discounted sale still helps if its contribution stays positive — it covers some fixed cost. But discounting below variable cost loses money on every unit. Contribution margin tells you where that line is.