Last updated: March 2026
What Is Break-Even Analysis?
Break-even analysis determines the minimum sales volume required to cover all costs. It is the foundational calculation for any business deciding whether a product, service, or venture is financially viable. Below the break-even point you operate at a loss; above it, every additional sale generates profit.
The formula is straightforward: Break-Even Units = Fixed Costs / (Selling Price - Variable Cost per Unit). The denominator is called the contribution margin because each unit "contributes" that amount toward covering fixed expenses.
Why Break-Even Matters
Investors and lenders expect to see break-even analysis in any business plan. It answers the critical question: is this business model realistic? If your break-even point requires selling 10,000 units per month in a market that moves 12,000, your margin of safety is dangerously thin.
Break-even analysis is also essential for pricing decisions. Before setting prices, calculate how many units you need to sell at different price points. Often a modest price increase dramatically reduces the number of sales needed to break even, even if it slightly reduces demand.
Contribution Margin Explained
The contribution margin is the difference between your selling price and variable cost per unit. It represents the dollars available from each sale to cover fixed costs. The contribution margin ratio expresses this as a percentage of the selling price.
A product priced at $40 with $15 in variable costs has a contribution margin of $25 (62.5%). This means 62.5 cents of every revenue dollar goes toward fixed costs and profit. Higher contribution margins make it easier to break even and provide more room for unexpected cost increases.
Frequently Asked Questions
What is a break-even point?
The break-even point is the number of units you must sell so that total revenue exactly equals total costs (fixed + variable). Below this point you lose money; above it you earn profit. It's calculated as Fixed Costs divided by Contribution Margin per Unit (Selling Price minus Variable Cost).
What is the contribution margin?
Contribution margin is the selling price minus the variable cost per unit. It represents the portion of each sale that 'contributes' to covering fixed costs and eventually generating profit. A $40 product with $15 variable cost has a $25 contribution margin — each unit sold puts $25 toward fixed costs.
What counts as a fixed cost vs a variable cost?
Fixed costs stay the same regardless of how many units you sell: rent, salaries, insurance, loan payments, and software subscriptions. Variable costs change with each unit produced or sold: raw materials, packaging, shipping per item, and sales commissions. Some costs are semi-variable (e.g., electricity) — estimate the fixed portion separately.
How do I lower my break-even point?
Three levers: raise your selling price (increases contribution margin), reduce variable costs per unit (also increases contribution margin), or reduce fixed costs. The 'What If' sliders above let you test each scenario instantly. Often a small price increase has the biggest impact because it directly widens the margin.
What is a good margin of safety?
Margin of safety measures how far your actual or expected sales exceed the break-even point. A 25-30% margin of safety is considered healthy for most businesses. Below 15% is risky — a small drop in sales could push you into losses. Seasonal businesses should target higher margins during peak periods.