Break-even pricing: contribution margin, break-even units, and profit

A practical guide to break-even pricing: how to compute contribution margin, break-even units, and profit at expected volume.

Updated 2026-01-27

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Why break-even pricing matters

Break-even analysis tells you how much volume you need to cover fixed costs at a given price and variable cost. It's the fastest way to sanity-check whether a pricing model can work at expected demand.

Key formulas

  • Contribution per unit = price - variable cost per unit.
  • Break-even units = fixed costs / contribution per unit.
  • Profit = units * contribution per unit - fixed costs.

What to include in variable costs

  • Payment processing fees, shipping, returns/refunds (ecommerce).
  • Support or delivery costs that scale with usage (SaaS infrastructure, success).
  • Any cost that rises with each additional unit/customer/order.

Common mistakes

  • Mixing time windows (monthly fixed costs with annual unit volumes).
  • Ignoring step costs (capacity constraints can make 'fixed' costs jump).
  • Treating break-even as success; you usually need buffer margin and profit.

FAQ

What if price equals variable cost-
Then contribution margin is zero and you will never break even because each unit contributes nothing toward fixed costs. You need either higher price or lower variable cost.
Is break-even revenue more useful than break-even units-
They answer similar questions. Units is more intuitive for products with stable pricing; revenue is more general when pricing varies or you have multiple SKUs.

More in finance

Break-even revenue: calculate your break-even point
Break-even ROAS: how to calculate it (and set a target ROAS)