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Operating Leverage Calculator

Measure how sensitive operating income is to sales.

How it is calculated

The tool works from three yearly figures in one currency: sales, total variable costs and total fixed costs. Contribution = sales − variable costs, EBIT = contribution − fixed costs, and DOL = contribution / EBIT. It shows the DOL as a multiple (for example 2.50×) and the operating income in US dollars.

Inputs cannot be negative, and if EBIT is exactly zero (the break-even point) there is no result, since the ratio is undefined. A negative EBIT gives a negative DOL, which just means the company is operating at a loss. The DOL is valid only around the sales level you entered and while the cost split between fixed and variable stays the same.

Worked example

Sales 500,000, variable costs 300,000, fixed costs 120,000. Contribution = 500,000 − 300,000 = 200,000. EBIT = 200,000 − 120,000 = $80,000.00. DOL = 200,000 / 80,000 = 2.50×. A 10% rise in sales would lift operating income by about 25%, and a 10% fall would cut it by the same 25%.

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Common mistakes

  • Putting total costs in the variable box. Fixed and variable costs must be split, otherwise the contribution margin is wrong.
  • Using EBIT in the numerator instead of contribution margin, which always gives 1.
  • Treating the DOL as constant. It changes with every level of sales and is highest near break-even.
  • Classing semi-variable costs (such as utilities with a base fee) entirely as fixed or entirely as variable without thinking about it.

About this calculator

The degree of operating leverage (DOL) measures how sensitive a company's operating income (EBIT) is to a change in sales, calculated as the contribution margin (sales minus variable costs) divided by EBIT (or equivalently, %change in EBIT ÷ %change in sales). A high DOL means a business has a lot of fixed costs relative to variable costs, so small swings in revenue produce amplified swings in operating profit — both up in good times and down in bad ones.

CFOs, financial analysts and business owners use operating leverage to understand risk and forecast earnings volatility: capital-intensive businesses like airlines, manufacturers and software companies (high fixed costs, low variable costs) tend to have high DOL, while service businesses with mostly variable labor costs have low DOL. Enter sales, variable costs and fixed costs to see the DOL and gauge how much a sales change would move operating income.

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