What is the Degree of Operating Leverage?
The degree of operating leverage (DOL) measures how sensitive a company's operating income is to a change in sales. Businesses with high fixed costs relative to variable costs have higher operating leverage.
DOL = Contribution Margin ÷ Operating Income (EBIT), or equivalently the percentage change in EBIT divided by the percentage change in sales.
- •High fixed costs, low variable costs per unit
- •EBIT swings sharply with sales changes
- •Bigger upside when sales grow
- •Bigger downside risk when sales fall
- •Typical of manufacturing, airlines, software
- •Low fixed costs, high variable costs per unit
- •EBIT changes gently with sales changes
- •Smaller upside when sales grow
- •Smaller downside risk when sales fall
- •Typical of retail, consulting, staffing firms
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Step-by-step worked examples
A company has a contribution margin of $40,000 and operating income of $10,000. Find the DOL and predict the EBIT effect of a 10% sales increase.
DOL = CM / EBIT = 40,000 / 10,000 = 4 %ΔEBIT = DOL × %ΔSales = 4 × 10% = 40% A 10% rise in sales produces a 40% rise in operating income.
A firm has CM = $60,000 and EBIT = $20,000. What is its DOL?
DOL = 60,000 / 20,000 = 3 Every 1% change in sales moves EBIT by roughly 3%.
Sales rise by 5% and EBIT rises by 20%. What is the DOL?
DOL = %ΔEBIT / %ΔSales = 20% / 5% = 4 This company has high operating leverage — EBIT is 4x more sensitive than sales.
Flashcards
Quick quiz
Q1.A company has CM = $50,000 and EBIT = $25,000. What is its DOL?
Q2.With a DOL of 3, a 4% increase in sales produces roughly what change in EBIT?
Q3.Which company likely has the highest operating leverage?
Q4.A high degree of operating leverage means the business is…
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Common mistakes
Confusing operating leverage with financial leverage. — Correct: Operating leverage relates to fixed vs. variable operating costs; financial leverage relates to debt and interest expense.
Assuming DOL is a fixed number over all sales levels. — Correct: DOL changes with sales volume — it is highest near the break-even point and decreases as sales grow further above it.
Thinking high DOL is always desirable. — Correct: High DOL magnifies losses in a downturn just as much as it magnifies gains in a boom — it raises risk.
Using net income instead of operating income (EBIT) in the formula. — Correct: DOL uses EBIT (operating income before interest and taxes), not net income.
FAQ
What is the degree of operating leverage?
DOL measures how much a company's operating income (EBIT) changes in percentage terms for a given percentage change in sales.
What is the DOL formula?
DOL = Contribution Margin ÷ Operating Income, which is equivalent to %ΔEBIT ÷ %ΔSales.
How do you calculate degree of operating leverage from percentage changes?
Divide the percentage change in EBIT by the percentage change in sales for the same period.
What are examples of high operating leverage industries?
Airlines, manufacturing, and software companies — they carry large fixed costs (planes, factories, R&D) relative to the variable cost of serving one more customer.