How to Calculate Your Business Break-Even Point
Before you can plan for profit, you need to know exactly how many sales cover your costs. Here's the formula every small business owner should know.
Break-Even Point (units) = Fixed Costs ÷ (Price per Unit − Variable Cost per Unit). The denominator, called the contribution margin, represents how much each sale contributes toward covering fixed costs before any profit begins.
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The Break-Even Formula
Break-Even (units) = Fixed Costs ÷ Contribution Margin
Where Contribution Margin = Price per Unit − Variable Cost per Unit.
Fixed vs Variable Costs
Fixed costs don't change with sales volume — rent, salaries, insurance, software subscriptions. Variable costs scale with each sale — materials, packaging, shipping, payment processing fees.
Worked Example
A business with $5,000/month fixed costs, selling a product at $50 with $20 variable cost per unit:
Contribution margin = $50 − $20 = $30
Break-even units = $5,000 ÷ $30 = 167 units/month
Break-even revenue = 167 × $50 = $8,333/month
Why Contribution Margin Percentage Matters
Contribution margin as a percentage of price (60% in the example above) varies enormously by industry. Software and digital products often see 70-90%+ margins; physical retail products might see 30-50%. Higher margins mean fewer units needed to break even — and more cushion for profit beyond that point.
Using Break-Even for Decision Making
Break-even analysis helps with pricing decisions, evaluating whether a new product line is viable, and understanding how fixed cost changes (like a rent increase) affect required sales volume.
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