Business Finance
Published on September 15, 2025. Updated on August 2, 2026.
Break-even is the point where total revenue equals total costs, so profit is zero. In units it is Fixed Costs / (Price per Unit - Variable Cost per Unit). With $50,000 of fixed costs, a $25 selling price and $15 of variable cost, you break even at 5,000 units, which is $125,000 of sales.
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Break-even analysis answers a simple business question: how much do you need to sell before revenue covers costs? It helps with pricing, hiring, discounts, advertising, product launches, and deciding whether a new fixed cost is realistic.
Break-even units are calculated by dividing fixed costs by contribution margin per unit. Contribution margin is the sale price minus the variable cost per unit.
Break-even units = Fixed Costs / (Sale Price - Variable Cost)
Break-even revenue converts the unit target into sales dollars:
Break-even revenue = Break-even units x Sale Price
Suppose a business has $10,000 in fixed costs, sells each unit for $50, and pays $30 in variable cost per unit. Contribution margin is $20 per unit, so break-even units are $10,000 / $20 = 500 units. Break-even revenue is 500 x $50 = $25,000.
Use the calculator to estimate break-even units, break-even revenue, contribution margin, and profit at different sales volumes.
Use the Break-Even Calculator →Break-even analysis shows how sensitive your business is to price, cost, and volume. If you lower price to win customers, contribution margin shrinks and you must sell more units. If suppliers raise variable costs, your break-even point rises. If rent, payroll, software, or insurance increases fixed costs, you need more contribution margin to cover the base cost.
When you plan by sales dollars instead of units, use contribution margin ratio. Contribution margin ratio equals contribution margin divided by sale price. Break-even revenue equals fixed costs divided by contribution margin ratio. This is useful for businesses with multiple products or service packages.
Discounts can increase sales volume but reduce contribution margin. Before launching a promotion, compare the new break-even point with realistic demand. Pair this guide with the Profit Margin Calculator, Markup Calculator, and Discount Calculator.
Divide fixed costs by the contribution margin per unit, which is the selling price minus the variable cost per unit. $50,000 / ($25 - $15) = 5,000 units. Every unit after that adds $10 of profit.
Divide fixed costs by the contribution margin ratio. The ratio here is $10 / $25 = 0.40, so break-even sales are $50,000 / 0.40 = $125,000. Use this version when you sell many products at different prices.
The money each sale leaves over after its own variable costs, available to cover fixed costs. At $25 price and $15 variable cost, contribution margin is $10 a unit, or 40% of the price. It is the single most useful number in this calculation.
Fixed costs do not change with volume: rent, salaries, insurance, software subscriptions. Variable costs rise with each unit: materials, packaging, shipping, payment processing, sales commission. Misclassifying a cost is the usual reason a break-even figure is wrong.
Add the profit you want to fixed costs before dividing. To earn $20,000 on top of covering $50,000 of fixed costs: ($50,000 + $20,000) / $10 = 7,000 units.
Raising the price lifts contribution margin and lowers the units you need. Going from $25 to $28 raises margin to $13, dropping break-even from 5,000 to 3,847 units. Small price rises move this number more than most people expect.
Because fixed costs are only fixed within a range. Hiring, moving premises, or adding equipment steps them up, and the break-even point jumps with them. Recalculate whenever the cost base changes rather than treating it as a one-off.
Break-even point moves in different ways depending on which type of cost changes. A higher fixed cost, such as rent or a new salaried hire, raises the break-even point directly and proportionally, since that entire added cost has to be recovered before profit begins regardless of sales volume. A higher variable cost per unit, such as a supplier price increase, raises break-even indirectly by shrinking the contribution margin on every unit sold, meaning each sale now covers less of the fixed costs, so more total units are needed to reach the same threshold. Understanding which type of cost you're changing helps you predict the break-even impact before committing to a decision like signing a longer lease or switching suppliers.
Break-even is often expressed in units or dollars of revenue, but it's just as useful to convert that figure into a time estimate: how many weeks or months of expected sales volume it will take to reach it. This reframing is particularly useful for new businesses or new product launches, where "how many units" is an abstract number but "how many months until we're covering our costs" is a concrete planning question investors and lenders will ask directly. If your break-even timeline stretches out longer than your available cash runway allows, that's a signal to revisit pricing, cut fixed costs, or raise additional capital before launch rather than after.
Break-even analysis gives you a practical minimum sales target. It does not guarantee profit, but it shows the first threshold your business must clear. For faster estimates, open the break-even calculator and test your fixed cost, price, and variable cost assumptions. For official guidance on this topic, see the U.S. Small Business Administration's startup cost guidance.
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