Break-Even Calculator
Find the break-even units and revenue for any business given fixed costs, price per unit, and variable cost per unit.
$
Enter your values above to see the results.
Tips & Notes
- ✓A higher contribution margin reduces the number of units needed to break even — improve it by raising price, reducing variable costs, or both.
- ✓Fixed costs do not change with volume — cutting them directly reduces break-even, while cutting variable costs only helps proportionally as volume increases.
- ✓Calculate break-even before launching a product or service — if the break-even volume exceeds realistic market demand, the business case does not work regardless of pricing.
- ✓The margin of safety (actual sales minus break-even) measures financial resilience — a 10% margin of safety is fragile; a 40% margin provides meaningful buffer against revenue declines.
- ✓Businesses with very high fixed costs and low variable costs (software, airlines) have high operating leverage — they lose heavily below break-even but profit massively above it.
- ✓Service businesses should include owner compensation in fixed costs — excluding it overstates break-even attractiveness and obscures the true cost of the business.
Common Mistakes
- ✗Classifying semi-variable costs incorrectly — costs like utilities and staffing have both fixed and variable components; mis-categorizing them distorts the break-even calculation.
- ✗Excluding owner salary from fixed costs — a business that appears profitable may not be covering the opportunity cost of the owner time, creating a false picture of viability.
- ✗Using break-even as the business target rather than the minimum threshold — break-even produces zero profit; the actual target must include desired profit above fixed costs.
- ✗Not recalculating break-even when cost structure changes — a rent increase or new hire changes fixed costs and raises the break-even point immediately.
- ✗Assuming all products have the same contribution margin in a multi-product business — weighted average contribution margin must be used when the product mix varies.
- ✗Ignoring the time dimension — break-even analysis shows the volume needed but not the time to reach it; cash flow during the ramp-up period must be separately funded.
Break-Even Calculator Overview
A break-even calculator finds the exact sales volume at which total revenue equals total costs — the point where the business stops losing money and starts generating profit. Below break-even, every unit sold reduces the loss. Above break-even, every unit sold generates profit equal to the contribution margin.
Understanding break-even is the foundation of any business financial plan — it tells you the minimum viable sales target before investing in a product, service, or business expansion.
What each field means:
- Fixed Costs — costs that do not change with sales volume: rent, salaries, insurance, loan payments, and equipment depreciation
- Price Per Unit — the selling price of one unit; what a customer pays
- Variable Cost Per Unit — the direct cost of producing or delivering one unit: materials, direct labor, commissions, packaging, and shipping
What your results mean:
- Break-Even Units — the number of units that must be sold to cover all fixed and variable costs with zero profit
- Break-Even Revenue — the total revenue needed to cover all costs; units times price
- Contribution Margin — price minus variable cost per unit; how much each sale contributes toward fixed costs and profit
- Contribution Margin % — contribution margin as a percentage of price; useful for comparing products or businesses
Example — $180,000 fixed costs, $75 price per unit, $30 variable cost per unit:
Contribution margin: $75 - $30 = $45 per unit Contribution margin %: $45 / $75 = 60% Break-even units: $180,000 / $45 = 4,000 units Break-even revenue: 4,000 x $75 = $300,000 At 4,001 units: profit = $45 (one unit above break-even) At 5,000 units: profit = 1,000 x $45 = $45,000 At 6,000 units: profit = 2,000 x $45 = $90,000 Fixed costs are fully recovered — every unit above break-even adds $45 to profit.
EX: How changing the price affects break-even — $180,000 fixed costs, $30 variable cost Price $60: contribution $30, break-even 6,000 units, $360,000 revenue Price $75: contribution $45, break-even 4,000 units, $300,000 revenue Price $90: contribution $60, break-even 3,000 units, $270,000 revenue Price $120: contribution $90, break-even 2,000 units, $240,000 revenue Raising price from $60 to $75 reduces break-even by 2,000 units (33% fewer sales needed).
Break-even units by fixed costs and contribution margin:
| Fixed Costs | CM $20 | CM $45 | CM $80 |
|---|---|---|---|
| $50,000 | 2,500 | 1,111 | 625 |
| $120,000 | 6,000 | 2,667 | 1,500 |
| $300,000 | 15,000 | 6,667 | 3,750 |
Profit at different sales volumes — $180,000 fixed costs, $45 contribution margin:
| Units Sold | Revenue | Total Costs | Profit / Loss |
|---|---|---|---|
| 2,000 | $150,000 | $240,000 | -$90,000 |
| 4,000 (break-even) | $300,000 | $300,000 | $0 |
| 5,000 | $375,000 | $330,000 | +$45,000 |
| 6,000 | $450,000 | $360,000 | +$90,000 |
The margin of safety — actual sales above break-even — is the buffer between current performance and the loss threshold. A business selling 6,000 units against a 4,000-unit break-even has a margin of safety of 2,000 units or 33%. A disruption reducing sales by up to 33% would not cause a loss. Businesses with low margins of safety are fragile — a small revenue decline tips them into loss. The break-even calculation also reveals the effect of cost structure: high fixed costs create operating leverage, where small revenue increases above break-even produce large profit swings.
Frequently Asked Questions
Break-even analysis determines the sales volume at which total revenue exactly equals total costs — the point of zero profit and zero loss. Below break-even, the business loses money because fixed and variable costs exceed revenue. Above break-even, every additional unit sold generates pure profit equal to the contribution margin (price minus variable cost). The formula is: Break-Even Units = Fixed Costs / Contribution Margin Per Unit. Break-even analysis is the starting point for any business financial plan because it defines the minimum viable sales target before a business becomes self-sustaining.
Break-Even Units = Fixed Costs / (Price Per Unit - Variable Cost Per Unit). Break-Even Revenue = Break-Even Units x Price Per Unit. Example: Fixed costs $120,000, price $80, variable cost $32. Contribution margin = $80 - $32 = $48. Break-even units = $120,000 / $48 = 2,500 units. Break-even revenue = 2,500 x $80 = $200,000. Alternative: Break-Even Revenue = Fixed Costs / Contribution Margin %. Contribution margin % = $48 / $80 = 60%. Break-even revenue = $120,000 / 0.60 = $200,000.
Contribution margin is selling price minus variable cost per unit — the amount each unit sold contributes toward covering fixed costs and generating profit. A product priced at $100 with $40 in variable costs has a $60 contribution margin and a 60% contribution margin ratio. The first units sold use their contribution margin to cover fixed costs. Once fixed costs are fully recovered (break-even), each subsequent unit contributes its full contribution margin directly to profit. High contribution margin products reach profitability faster and generate more profit per unit above break-even than low contribution margin products.
Raising the price increases the contribution margin, which reduces the units needed to break even. Lowering the price decreases contribution margin and raises break-even. Example: $120,000 fixed costs, $40 variable cost per unit. At $80 price: CM = $40, break-even = 3,000 units. At $100 price: CM = $60, break-even = 2,000 units. At $60 price: CM = $20, break-even = 6,000 units. Price changes have a multiplier effect on break-even because they affect both revenue per unit and contribution margin simultaneously — a 25% price increase typically reduces break-even by 30-40%.
The margin of safety is the difference between actual (or projected) sales and break-even sales, expressed in units, revenue, or as a percentage. Margin of Safety % = (Actual Sales - Break-Even Sales) / Actual Sales x 100. A business with $500,000 in actual revenue and $350,000 break-even revenue has a 30% margin of safety. This means revenue can fall up to 30% before the business starts losing money. Businesses with thin margins of safety (under 10-15%) are financially fragile. A 30-40% margin of safety provides meaningful resilience against revenue disruption, competition, or economic downturns.
For businesses with multiple products at different prices and variable costs, use the weighted average contribution margin based on the expected sales mix. If Product A (CM $50) accounts for 60% of sales and Product B (CM $30) accounts for 40%: Weighted CM = (0.60 x $50) + (0.40 x $30) = $30 + $12 = $42. Break-even units = Fixed Costs / $42. The break-even changes whenever the sales mix changes — selling more of the lower-CM product raises break-even; selling more of the higher-CM product lowers it. This is why businesses actively manage product mix and sales team incentives toward higher-margin offerings.