The break-even point is one of the most useful numbers a small business can know. It answers a simple but critical question: how much do I need to sell just to cover my costs? Everything sold beyond that point is profit; everything below it is a loss. This guide explains how to calculate your break-even point step by step, with a hypothetical worked example.
Fixed costs, variable costs, and contribution margin
Break-even analysis relies on splitting your costs into two groups. Fixed costsstay the same no matter how much you sell — rent, insurance, salaries, and software subscriptions. Variable costs change with each sale — materials, packaging, shipping, and transaction fees. The gap between your selling price and your variable cost per unit is your contribution margin, the amount each sale contributes toward covering fixed costs.
- Contribution Margin per Unit = Selling Price − Variable Cost per Unit
The break-even formula
- Break-Even Units = Fixed Costs ÷ Contribution Margin per Unit
- Break-Even Revenue = Break-Even Units × Selling Price
A worked example
Hypothetical worked example
Business type: Small service business (mobile pet grooming)
Revenue: $50 per appointment, $20 variable cost per appointment
Costs: $12,000 in fixed monthly costs (van lease, insurance, wages)
Calculation
Contribution margin = $50 − $20 = $30 per appointment Break-even units = $12,000 ÷ $30 = 400 appointments Break-even revenue = 400 × $50 = $20,000
The business must complete 400 appointments, generating $20,000 in monthly revenue, before it earns a single dollar of profit. Appointment number 401 is where profit begins — a concrete, actionable monthly target. These figures are illustrative and do not represent an actual business or typical outcome.
How pricing changes break-even
Price has a powerful effect on break-even. If the price rose to $60, contribution margin would climb to $40, lowering break-even to 300 appointments. If it dropped to $40, contribution margin would fall to $20, raising break-even to 600 appointments. This is why break-even analysis is such a valuable pricing tool — small price changes dramatically shift how much you must sell.
Using break-even to make decisions
Break-even analysis helps with more than pricing. Use it to evaluate whether a new fixed cost — a larger space, another hire, new equipment — is worth taking on, since each addition raises your break-even point. Use it to set sales goals your team can rally around, and to model promotions, since heavy discounting lowers contribution margin and pushes break-even higher.
Common mistakes
- Forgetting to include all fixed costs, understating the true break-even point.
- Mixing fixed and variable costs together, distorting the contribution margin.
- Calculating break-even once and never updating it as costs change.
- Setting sales targets without checking whether they clear the break-even point.
Practical tips
- List every fixed cost monthly so nothing is missed in the calculation.
- Recalculate break-even whenever prices, materials costs, or rent change.
- Use break-even units as a concrete team sales target, not just an internal number.
- Model a price increase before implementing it to see the break-even impact.
Use the break-even calculator to see your break-even point in both units and revenue instantly, visualized against your costs.
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Educational purpose. This resource provides educational information to help users understand small business financial concepts. It does not provide personalized financial, tax, or accounting advice.
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