Break-even analysis

Break-even analysis is the discipline of working out, for a given product or business, the level of sales volume at which total revenue equals total costs. Below that volume the business loses money on every period. Above it, the business is profitable. The point itself — where profit is exactly zero — is called the break-even point.

Why it matters

Break-even analysis is one of the few techniques that can be applied early in a business decision and still produce a useful answer. Before a product is launched, before pricing is finalised, and before any revenue exists at all, break-even tells the owner roughly how many units must sell before fixed costs are covered. That number sets a realistic minimum target for marketing, distribution, and operations.

The three inputs

A break-even calculation needs three numbers:

• Fixed costs — costs that don’t change with volume (rent, salaries, software, insurance, equipment leases).
• Variable cost per unit — costs that scale with each unit sold (materials, packaging, payment processing, shipping).
• Selling price per unit — the price at which the unit is sold.

The headline formula:

Break-even units = fixed costs ÷ (selling price − variable cost per unit)

The denominator — selling price minus variable cost — is the contribution margin per unit, the amount each sale contributes toward covering fixed costs.

What it surfaces

A complete break-even analysis exposes:

• The minimum viable volume — sales below this lose money on every period.
• The contribution margin — how robust the unit economics are to cost increases.
• The volume needed for a target profit — extending the formula to include desired profit on top of fixed costs.
• Sensitivity to assumptions — small changes in price, cost, or volume often shift break-even by months or years.

Where it falls short

Break-even analysis is most accurate for single-product businesses with stable costs. It assumes linear cost behaviour, no volume discounts or step changes in fixed costs, and that all units produced are actually sold. For multi-product businesses, more sophisticated weighted contribution margin analysis is needed. And the analysis says nothing about how long it will take to reach break-even volume — that’s a separate forecasting exercise.

Despite these limits, the discipline of computing the break-even number is a core practice of every founder, product manager, and operations lead. It forces explicit assumptions about cost and price that many businesses otherwise leave implicit, and it provides a clear go/no-go threshold for decisions about pricing, scaling, and product viability.