Break-even analysis determines the sales volume at which a business’s total revenue equals its total costs — the point at which it stops losing money but has not yet begun to profit. Below this threshold the business consumes more than it earns; above it, each additional unit of sale contributes to profit.
The calculation divides costs into two categories. Fixed costs persist regardless of sales volume: rent, insurance, salaried wages, loan payments. Variable costs scale with production or sales: ingredients, hourly labor, packaging, transaction fees. The break-even point in units equals fixed costs divided by the contribution margin per unit (selling price minus variable cost per unit). The break-even point in revenue equals fixed costs divided by the contribution margin ratio (contribution margin per unit divided by selling price).
This analysis is a standard component of financial projections in American business practice. Investors use it to assess how much sales volume a business needs before it can sustain itself, and how sensitive profitability is to changes in price, costs, or volume. A business with high fixed costs and low variable costs (a software company, a venue) breaks even at a higher threshold but profits sharply beyond it. A business with low fixed costs and high variable costs (a food vendor, a contractor) breaks even quickly but profits gradually.
The model assumes that costs divide cleanly into fixed and variable, that selling prices remain constant across volume, and that the product mix doesn’t change. These assumptions are often violated in practice — costs are frequently semi-variable, prices shift with competition, and product mix responds to demand. The analysis remains useful not because it predicts a precise number but because it forces explicit reasoning about cost structure.
Related terms
- Financial projections — the broader forecasting framework
- Income statement — where revenue and costs are reported
- Revenue model — the structure that determines selling price and volume
- Average check — a key input for revenue-side break-even calculations in food service