What Is Break-Even Analysis?
Key Takeaways
- Break-even analysis identifies the sales volume at which total revenue equals total costs.
- It is calculated by dividing fixed costs by the contribution margin per unit.
- SMEs use it to evaluate pricing changes, new products, and cost decisions.
- The break-even point is a minimum target, not an aspirational goal.
What the break-even point tells you
The break-even point is the level of sales at which your total revenue exactly covers your total costs — you make neither a profit nor a loss. Every unit sold beyond break-even contributes directly to profit; every unit below it means you are making a loss. For SME owners, knowing the break-even point answers a fundamental question: how much do I need to sell just to keep the lights on? It is the minimum viable sales target, and it gives you an objective reference point for evaluating pricing, staffing, and expansion decisions.
How to calculate break-even
Break-even is calculated by dividing your total fixed costs by your contribution margin per unit. Fixed costs are costs that do not change with sales volume — rent, salaries, insurance, software subscriptions. Contribution margin per unit is the selling price minus the variable cost per unit (the cost of materials, direct labour, or commissions that scale with each sale). For example, if your fixed costs are £50,000 per month and your contribution margin is £25 per unit, your break-even point is 2,000 units per month. For service businesses, replace units with billable hours or client engagements.
Applications beyond the basic calculation
Break-even analysis has a wide range of practical uses. Pricing decisions: if you are considering a price reduction, calculate how many more units you need to sell to compensate and whether that volume is realistic. New product launches: estimate the fixed cost of the launch and the contribution margin of the new product to determine the sales volume needed to justify the investment. Hiring decisions: a new hire increases fixed costs — calculate the incremental revenue needed to break even on that salary. Each of these applications uses the same arithmetic but helps you make better-informed decisions.
Limitations to keep in mind
Break-even analysis assumes that variable costs and selling prices are constant across all volume levels, which is often a simplification. In practice, bulk discounts change variable costs, and price promotions change revenue. It also assumes all output is sold — inventory build-up is not accounted for. Use break-even as a directional tool and a starting point for conversation, not as a precise prediction. Pair it with cash flow analysis to understand not just when you cover costs, but when cash will actually be in your account.