The Break-Even Formula and What It Reveals
Break-even analysis answers: at what sales volume does revenue equal total costs, producing zero profit? The formula: Break-Even Units = Fixed Costs ÷ (Selling Price − Variable Cost per Unit). The denominator is the contribution margin per unit: how much each sale contributes toward fixed costs before profit begins. Calculate yours instantly with our Break-Even Calculator.
Fixed vs. Variable Costs
- Fixed costs do not change with sales volume: rent, salaries, insurance, software subscriptions, loan payments.
- Variable costs scale directly with volume: raw materials, per-unit shipping, payment processing fees, sales commissions.
- Semi-variable costs have both components: split them at the component level rather than treating them as purely one or the other.
Break-Even in Revenue Terms
For businesses selling multiple products, break-even in unit terms is meaningless without knowing the sales mix. Instead: Break-Even Revenue = Fixed Costs ÷ Contribution Margin Ratio, where Contribution Margin Ratio = (Revenue − Variable Costs) ÷ Revenue. A business with $120,000 in fixed costs and a 40% CM ratio needs $300,000 in revenue to break even, regardless of product mix.
Using Break-Even for Pricing Decisions
Run the analysis in reverse: “What selling price produces break-even at a volume we can realistically achieve?” This reframes pricing from guesswork to constraint satisfaction. If your market research suggests 1,000 units/month are achievable and fixed costs are $15,000, your required contribution margin is $15 per unit. If variable cost is $12, your minimum price is $27.