Business Finance | July 18, 2026 | Capstag.com | 9 min read
Break-even analysis is the calculation that every business owner should complete before launching a product, opening a location, hiring a staff member, or making any significant fixed cost commitment. It answers the most fundamental question in business economics: how much revenue do I need to generate before I start making money? Operating below break-even means losing money with every transaction regardless of how hard you work. Operating above it means every additional dollar of revenue contributes directly to profit.
Quick Answer: Break-even revenue = Fixed Costs ÷ (1 − Variable Cost as % of Revenue). Example: $20,000/month in fixed costs, variable costs at 35% of revenue. Break-even = $20,000 ÷ 0.65 = $30,769/month. Below this revenue level, the business loses money. Above it, each additional dollar of revenue contributes 65 cents to profit (the contribution margin). Break-even in units = Fixed Costs ÷ (Price per Unit − Variable Cost per Unit). Both calculations are essential for businesses that sell both services and products.
From a financial planning perspective, break-even analysis is the starting point for every business financial decision involving a fixed cost commitment. Before adding a location, hiring a full-time employee, or signing a lease, calculate the revenue increase required to cover the new fixed cost. This connects to the complete business finance guide at the complete guide to business finance and the financial plan at how to create a business financial plan.
Fixed costs vs variable costs — the foundation
Break-even analysis requires accurate classification of costs. Fixed costs remain constant regardless of revenue: rent, minimum payroll, insurance, software subscriptions, loan repayments, and owner salary. Variable costs scale directly with revenue: cost of goods sold, sales commissions, shipping, packaging, and materials. Semi-variable costs are fixed up to a threshold then variable beyond it — part-time staff, utilities, marketing spend. For break-even analysis, semi-variable costs must be classified as either fixed or variable based on their predominant behaviour at current operating scale.
Contribution margin — what each unit of revenue contributes to fixed cost coverage
The contribution margin is the revenue remaining after variable costs — available to cover fixed costs and generate profit. Contribution margin ratio = (Revenue − Variable Costs) ÷ Revenue. Example: $100 service at 35% variable cost ratio. Contribution margin = $65. For each dollar of revenue, 65 cents covers fixed costs. Once fixed costs are covered, 65 cents of every additional revenue dollar is profit. The contribution margin ratio is the single most important profitability driver in any break-even analysis — improving it (by raising prices or reducing variable costs) directly improves how quickly the business passes break-even and how profitable it becomes above it.
| Monthly Fixed Costs | Variable Cost % | Contribution Margin | Break-Even Revenue |
|---|---|---|---|
| $10,000 | 30% | 70% | $14,286/month |
| $15,000 | 35% | 65% | $23,077/month |
| $20,000 | 40% | 60% | $33,333/month |
| $25,000 | 50% | 50% | $50,000/month |
| $30,000 | 25% | 75% | $40,000/month |
Break-even for new hires and fixed cost decisions
Break-even analysis is most valuable for evaluating specific fixed cost additions. Adding a full-time employee at $60,000/year ($5,000/month total payroll cost): what additional monthly revenue must this hire generate to break even on their cost? If the business has a 65% contribution margin: additional revenue required = $5,000 ÷ 0.65 = $7,692/month. The hire breaks even when they generate $7,692/month in additional revenue. Below that, they reduce profitability. Above it, they contribute to profit. This framework applies equally to new locations, equipment, marketing spend, and any other fixed cost commitment.
Sensitivity analysis — testing assumptions
Break-even analysis is only as accurate as its assumptions. Sensitivity analysis tests how the break-even point changes when key variables shift. What happens to break-even if fixed costs increase by 10%? If variable costs rise from 35% to 40% of revenue? If the average transaction value drops by 15%? Run three scenarios: optimistic (best case), base case (most likely), and pessimistic (worst case). A business decision that is viable only under optimistic assumptions is a high-risk decision. One that breaks even under pessimistic assumptions is a strong decision with built-in downside protection.
Conclusion
Break-even analysis is not a one-time calculation — it is a decision tool to apply before every significant cost commitment. Before adding an employee, signing a lease, purchasing equipment, or launching a product line, calculate the revenue required to break even on the additional cost. If the business can reliably achieve that revenue given current trajectory, proceed. If the break-even requires significant revenue growth from an uncertain source, evaluate the risk carefully before committing.
Key Takeaways
- Break-even revenue formula: Fixed Costs ÷ (1 − Variable Cost %). Example: $20,000 fixed costs, 35% variable costs = $20,000 ÷ 0.65 = $30,769/month break-even. Every dollar of revenue above this contributes the contribution margin (65 cents) directly to profit.
- Contribution margin ratio = (Revenue − Variable Costs) ÷ Revenue. This is the most important single number in break-even analysis — it determines how quickly fixed costs are covered and how profitable the business becomes above break-even.
- Use break-even analysis for every fixed cost decision: new hire break-even = new monthly fixed cost ÷ contribution margin ratio. Adding a $5,000/month employee with 65% contribution margin requires $7,692/month in additional revenue to break even.
- Break-even in units = Fixed Costs ÷ (Price per Unit − Variable Cost per Unit). A product priced at $50 with $20 variable cost ($30 contribution margin) and $15,000 monthly fixed costs breaks even at 500 units per month.
- Run three break-even scenarios: optimistic, base case, and pessimistic. A decision that is viable only under optimistic assumptions carries high risk. A decision that breaks even under pessimistic assumptions has built-in downside protection.
- The fastest ways to lower the break-even point: (1) Reduce fixed costs — eliminate non-essential overhead. (2) Increase prices — raises contribution margin. (3) Reduce variable costs — improves margin on every transaction. All three reduce the revenue required to reach profitability.
Frequently Asked Questions
Break-even analysis calculates the minimum revenue or units sold required for a business to cover all its costs — producing zero profit and zero loss. The break-even point is where total revenue equals total costs. Revenue above break-even generates profit; below it generates losses. Formula: Break-even revenue = Fixed Costs ÷ (1 − Variable Costs as % of Revenue). Break-even units = Fixed Costs ÷ (Price per Unit − Variable Cost per Unit). Essential before launching a business, adding a product line, or making any significant fixed cost commitment.
Step 1: Identify all fixed costs (remain constant regardless of revenue — rent, salaries, insurance, software, loan payments). Step 2: Calculate variable cost percentage (variable costs ÷ revenue at current operating level). Step 3: Calculate contribution margin ratio (1 − variable cost %). Step 4: Divide fixed costs by contribution margin ratio. Example: $15,000 fixed costs, 40% variable costs, 60% contribution margin. Break-even = $15,000 ÷ 0.60 = $25,000/month. The business must generate $25,000/month before it makes a profit.
Break-even analysis is important because it converts cost structure into a minimum revenue target — making the business model either viable or not before money is committed. It reveals whether a business can reach profitability at achievable market volume. It quantifies the revenue impact of adding any fixed cost (new hire, lease, equipment). It identifies which variables (pricing, variable cost reduction, fixed cost elimination) have the highest impact on profitability. And it provides the financial floor below which the business loses money with every transaction regardless of activity level.
This article is for educational purposes only. The information provided reflects general financial principles and does not constitute personalised financial, tax, or legal advice. Always consider your own financial circumstances before making any decisions.
