Break-Even Calculator

How to Use the Break-Even Calculator

What Is a Break-Even Analysis?

A break-even analysis identifies the exact point at which total revenue equals total costs — neither profit nor loss. Every unit sold above break-even generates pure profit; every unit below generates a loss. It answers three critical questions: How many units must I sell to cover all costs? What revenue level is required before turning profitable? How much could sales fall before I start losing money?

The Break-Even Formula

Worked Example: Product Business

A candle maker with $3,000/month fixed costs, $8 variable cost per candle, and a $28 selling price:

• Contribution margin: $28 − $8 = $20 per candle
• CM ratio: $20 ÷ $28 = 71.4%
• Break-even: $3,000 ÷ $20 = 150 candles/month
• Break-even revenue: 150 × $28 = $4,200/month

Every candle above 150 units earns $20 in profit. At 300 sales/month: (300 − 150) × $20 = $3,000 profit. Margin of safety: 50%.

Worked Example: Service Business

A freelance web designer with $2,200/month fixed costs, $150 variable cost per project, and $1,500 project fee:

• Contribution margin: $1,500 − $150 = $1,350 per project
• Break-even: $2,200 ÷ $1,350 = 1.63 → 2 projects/month

With a $1,350 margin per project, only 2 projects cover all costs — every project after that is nearly all profit.

Fixed vs Variable Costs: Getting It Right

Misclassifying costs is the most common mistake. Fixed costs stay constant at any volume: rent, salaried staff, insurance, loan repayments, subscription software. Variable costs scale with output: raw materials, production labor, packaging, shipping, credit card processing fees (typically 2.9%).

How to Lower Your Break-Even Point

• Reduce fixed costs — renegotiate rent, reduce overhead, automate labor. A $1,000 reduction in monthly fixed costs directly lowers break-even by $1,000 ÷ contribution margin units.
• Reduce variable costs — better supplier pricing, leaner production, economies of scale widen the contribution margin.
• Increase selling price — higher-value positioning, premium tiers, bundling. Even a 10% price increase dramatically reduces break-even units.

How to Calculate Break-Even Point by Hand: Two Worked Examples

Product business: fixed costs of $15,000/month, selling price of $40/unit, variable cost of $18/unit.

Step 1 — find the contribution margin (the amount each unit contributes toward covering fixed costs): $40 − $18 = $22 per unit.

Step 2 — divide fixed costs by the contribution margin. $15,000 ÷ $22 = 681.8 units, rounding up to 682 units/month to actually clear the fixed costs. In revenue terms: 682 × $40 = $27,280/month in sales needed before any profit begins.

Service business: fixed costs of $8,000/month, billing $85/hour, with a variable cost of $15/hour (contractor pay, materials). Contribution margin = $85 − $15 = $70/hour. Break-even = $8,000 ÷ $70 = 114.3 billable hours/month — a concrete, schedulable target rather than an abstract revenue number.

How Do You Actually Lower a Break-Even Point?

Which lever — price, fixed costs, or variable costs — has the biggest impact?

Raising price directly increases the contribution margin on every unit sold, meaning even a small price increase can meaningfully reduce the break-even unit count: raising the $40 product's price to $44 (a 10% increase) raises the contribution margin to $26/unit, dropping break-even from 682 to 577 units — a larger proportional effect than a 10% cut to variable costs would produce in this example, because contribution margin is a smaller base number than either fixed or variable costs alone.

Why is correctly classifying fixed versus variable costs so important to this calculation?

Misclassifying a cost that actually scales with production (like packaging materials) as fixed will understate the true variable cost per unit and produce an artificially low, overly optimistic break-even estimate. A cost is genuinely fixed only if it stays constant regardless of units sold within a relevant range — rent and salaried staff are fixed; raw materials and sales commissions are variable; some costs (like utilities with a base fee plus usage charge) are a mix of both and should be split accordingly for an accurate calculation.

What does break-even analysis not tell you about a business?

Break-even identifies the point of zero profit, not the point of adequate profit — a business break-even at 682 units per month still needs to sell meaningfully more than that to generate the actual return an owner or investor expects. Break-even is best used as a planning floor (the minimum viable sales level) rather than a target, since a business that only ever hits exactly its break-even point generates no profit at all.

Frequently Asked Questions