Break-even analysis answers the most fundamental question in business: how much do I need to sell before I stop losing money? Every dollar of revenue below the break-even point represents a loss; every dollar above it is profit. Whether you are launching a startup, pricing a product, or evaluating a new project, this calculation determines the minimum viable sales volume.
The Break-Even Formula
Break-Even Units = Fixed Costs / (Price per Unit − Variable Cost per Unit) Break-Even Revenue = Fixed Costs / Contribution Margin Ratio Contribution Margin = Price − Variable Cost. Contribution Margin Ratio = Contribution Margin / Price.
Worked Example
A bakery has $4,000/month in fixed costs (rent, insurance, loan payments). Each cake costs $8 in ingredients and packaging (variable cost) and sells for $28. The contribution margin is $28 − $8 = $20 per cake. Break-even = $4,000 / $20 = 200 cakes per month, or about 7 per day. Any cake sold beyond 200 generates $20 of pure profit. Model your own numbers with the break-even calculator on our business tools page.
Fixed vs Variable Costs
| Fixed Costs (don’t change with volume) | Variable Costs (change with each unit) |
|---|---|
| Rent / mortgage | Raw materials / ingredients |
| Insurance premiums | Packaging |
| Salaries (non-commission) | Shipping per order |
| Software subscriptions | Payment processing fees (2.9%) |
| Equipment depreciation | Sales commissions |
| Loan payments | Hourly labor per unit produced |
What Break-Even Tells You
- Minimum viable sales volume. If you cannot realistically sell enough units to break even, the business model needs adjustment before launching.
- Pricing power. A small price increase has an outsized impact on break-even. Raising the bakery’s cake price from $28 to $32 drops break-even from 200 to 167 cakes — a 17% improvement from a 14% price increase.
- Cost sensitivity. Reducing variable costs (cheaper suppliers, less waste) has the same effect as raising prices. Reducing the bakery’s ingredient cost from $8 to $6 drops break-even from 200 to 182 cakes.
- Risk assessment. If break-even is 90% of your maximum capacity, the business has very thin margins and high risk. Ideally, break-even should be 40–60% of realistic capacity.
Key Takeaways
- Break-Even = Fixed Costs / Contribution Margin tells you exactly how many units you need to sell.
- Contribution margin (price minus variable cost) determines how much each sale contributes to covering fixed costs.
- Small price increases have an outsized impact on profitability and break-even point.
- Break-even should be 40–60% of capacity for a healthy business model.
- Run this analysis before launching any product, service, or new business line.
Frequently Asked Questions
How do I calculate break-even for a service business?
For service businesses, use hourly revenue instead of price per unit. If you charge $150/hour with $30/hour in variable costs (software, travel, subcontractors) and have $6,000/month in fixed costs, your break-even is $6,000 / ($150 - $30) = 50 billable hours per month. This tells you the minimum utilization rate needed to cover costs.
What is a good contribution margin?
Contribution margins vary widely by industry. Software and digital products often have 80-95% margins. Restaurants typically operate at 60-70%. Retail averages 40-60%. Manufacturing is often 25-45%. A higher margin means you need fewer sales to break even, giving the business more resilience against downturns.
How does break-even change with multiple products?
With multiple products, calculate a weighted average contribution margin based on your expected sales mix. If you sell 60% Product A (margin $20) and 40% Product B (margin $35), your weighted margin is 0.6($20) + 0.4($35) = $26. Then divide fixed costs by $26 to get break-even in equivalent units.