Break-Even Calculator

Contribution margin is the amount each unit sold contributes to covering fixed costs after variable costs are paid. It is calculated as Unit Price minus Variable Cost per Unit. A higher contribution margin means each sale covers more overhead, requiring fewer total sales to break even. It is the core lever in break-even analysis: raising price, reducing variable costs, or both will improve it.

The contribution margin ratio (CMR) expresses the contribution margin as a percentage of the selling price. A CMR of 60% means that for every $1 of revenue, $0.60 goes toward covering fixed costs and profit. CMR is particularly useful for calculating break-even in revenue terms: Break-even revenue = Fixed Costs / CMR.

Service businesses often have lower variable costs (since the primary input is labor, which may be partly fixed) but high fixed overhead. For a consulting firm, the break-even analysis focuses on billable hours: fixed costs divided by average hourly contribution margin tells you how many billable hours per month are required before the firm is profitable.

The margin of safety measures how far current sales are above the break-even point, expressed as a percentage of current sales. A margin of safety of 25% means sales can drop 25% before the business loses money. Low margins of safety (under 15-20%) indicate vulnerability to downturns. High margins of safety (above 40-50%) indicate a financially robust position.