Calculate the exact number of units you need to sell to cover all costs. Visualize cost vs revenue, analyze contribution margins, and run what-if scenarios on pricing and costs.
The single most important number in break-even analysis is the contribution margin — the difference between selling price and variable cost per unit. A product with a $50 price and $20 variable cost has a $30 contribution margin (60% ratio). Every dollar of contribution margin goes toward covering fixed costs first, then becomes pure profit. Doubling your contribution margin cuts your break-even point in half. This is why pricing power matters more than volume in most businesses.
High fixed costs make break-even harder to reach, but once you pass it, profits grow rapidly. A software company with $100K in fixed costs and 90% contribution margin breaks even at $111K revenue — but at $200K revenue, profit is $80K (40% net margin). Compare a service business with $20K fixed costs and 30% contribution margin: break-even is $67K, but $200K revenue only yields $40K profit (20% net margin). The high-fixed-cost business has more operating leverage — more risk below break-even, more reward above it.
A 10% price increase has a far larger effect on break-even than a 10% reduction in variable costs. If your price is $50 and variable cost is $30, a 10% price increase ($55) changes contribution margin from $20 to $25 — a 25% improvement, reducing break-even by 20%. A 10% variable cost reduction ($27) changes contribution margin from $20 to $23 — a 15% improvement, reducing break-even by 13%. Before cutting costs, consider whether the market can support a modest price increase.
Break-even units are calculated as Fixed Costs ÷ (Selling Price − Variable Cost per Unit). Break-even revenue equals Break-Even Units × Selling Price. Contribution margin per unit equals Selling Price − Variable Cost. Contribution margin ratio equals Contribution Margin ÷ Selling Price × 100. Break-even revenue can also be calculated as Fixed Costs ÷ Contribution Margin Ratio.
The profit zone table shows profit or loss at incremental unit quantities from 0% to 200% of the break-even point. The chart plots total revenue and total cost lines with the break-even intersection point marked. What-if scenarios recalculate break-even in real time as you adjust price or cost inputs.