Break-even analysis helps business owners determine the minimum number of units they must sell to cover all fixed and variable costs. Until you reach your break-even point, every sale contributes to covering overhead. Once you surpass it, each additional unit sold generates pure profit.

The key formula is: Break-Even Units = Fixed Costs / (Selling Price - Variable Cost per Unit). The difference between the selling price and variable cost is called the contribution margin. This is the amount each unit contributes toward covering fixed costs. The contribution margin ratio expresses this as a percentage of the selling price.

For example, if your fixed costs are $50,000, your variable cost per unit is $25, and your selling price is $75, the contribution margin is $50 per unit. You would need to sell 1,000 units to break even, generating $75,000 in revenue. Every unit sold beyond 1,000 generates $50 of profit. This analysis is critical for pricing decisions, cost control, and evaluating new product viability.