Why it matters
A business needs to know how much contribution each sale adds toward fixed costs. The break-even model connects pricing, volume and cost assumptions in one calculation.
A worked example
With £1,000 fixed costs, a £20 selling price and £12 variable cost per unit, contribution is £8. Break-even is 1,000 ÷ 8 = 125 units.
Illustrative example · simplified assumptionsA common mistake
Dividing fixed costs by selling price without subtracting variable costs.
Where the idea needs care
The model assumes constant price, variable cost and fixed costs over the relevant range. Cash timing and taxes may differ.
Apply the idea
Explain this concept using a different example from your spending, work, business or a policy debate. State what stays fixed and what could change the result.
Sources and further study
Examples and explanations by Alibomics. Numeric illustrations are not current market quotations.