In short: the break-even point is the level of sales at which a business covers all its costs but makes no profit. Below it you lose money; above it you make money. It is one of the most useful numbers a founder can know.
What is the break-even point?
The break-even point in accounting is the level of sales at which total revenues equal total expenses, resulting in neither profit nor loss. It shows the minimum amount of sales needed to cover all fixed and variable costs.
The break-even point can be expressed in two equivalent ways — in units (how many units must be sold) or in sales dollars (how much revenue must be earned).
Why the break-even point matters
Break-even analysis is one of the most useful planning tools an owner-manager has. It helps you to:
- Decide on pricing — if break-even is too high, the price is probably too low.
- Set sales targets for the team or a new product line.
- Stress-test a business plan or a new investment before committing capital.
- Understand the impact of cost changes — rent increases, headcount changes, raw-material cost shifts.
- Plan funding requirements — how long can the business run before it must reach break-even?
The break-even formulas
There are two formulas, both of which give the same answer in different units:
- Break-even point (in units) = Fixed Costs ÷ (Selling Price per Unit − Variable Cost per Unit)
- Break-even point (in sales dollars) = Fixed Costs ÷ Contribution Margin Ratio
Key terms explained
- Fixed Costs — costs that do not change with production or sales volume (e.g. rent, salaries, insurance).
- Variable Cost per Unit — costs that vary directly with production volume (e.g. raw materials, direct labour).
- Selling Price per Unit — revenue earned from selling one unit.
- Contribution Margin = Selling Price per Unit − Variable Cost per Unit. The amount each sale contributes towards fixed costs (and after break-even, towards profit).
- Contribution Margin Ratio = Contribution Margin ÷ Selling Price per Unit. The percentage of each sales dollar that contributes to fixed costs and profit.
A worked example
Suppose a business has the following figures:
- Fixed costs = $480,000
- Selling price per unit = $20
- Variable cost per unit = $8
The break-even calculation runs as follows:
- Contribution margin = $20 − $8 = $12
- Break-even units = $480,000 ÷ $12 = 40,000 units
- Contribution margin ratio = $12 ÷ $20 = 60%
- Break-even sales dollars = $480,000 ÷ 60% = $800,000
At this level of activity, sales revenue exactly covers all costs, and any sales beyond this point generates profit. Each additional unit sold above 40,000 contributes its full $12 contribution margin to operating profit.
Calculation summary at a glance
| Item | Calculation | Result |
|---|---|---|
| Selling price per unit | Given | $20 |
| Variable cost per unit | Given | $8 |
| Contribution margin | $20 − $8 | $12 |
| Contribution margin ratio | $12 ÷ $20 | 60% |
| Fixed costs | Given | $480,000 |
| Break-even point (units) | $480,000 ÷ $12 | 40,000 units |
| Break-even point (sales dollars) | $480,000 ÷ 60% | $800,000 |
The bottom line
The break-even point is one of the simplest and most powerful numbers in management accounting. Knowing it tells you the floor under your business: the level of activity below which you lose money, and above which every sale starts to build profit. For most owner-managers, it should be one of the first numbers calculated when launching a new product, restructuring costs, or reviewing pricing.
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