Degree of Operating Leverage Calculator (DOL, DFL & DCL)
Calculate the degree of operating leverage (DOL), financial leverage (DFL) and combined leverage (DCL) from sales, variable costs, fixed costs and interest — and how a change in sales moves EBIT and EPS.
How it works
Contribution margin = sales − variable costs · EBIT = contribution margin − fixed costs · DOL = contribution margin ÷ EBIT · DFL = EBIT ÷ (EBIT − interest) · DCL = DOL × DFL = contribution margin ÷ (EBIT − interest) · %ΔEBIT = DOL × %Δsales · %ΔEPS = DCL × %Δsales
Leverage measures how strongly profit reacts to a change in sales. Operating leverage comes from fixed operating costs: once they are covered, each extra sale drops its full contribution margin to EBIT, so a DOL of 2.67 means EBIT moves 2.67% for every 1% change in sales. Financial leverage comes from fixed interest: it magnifies the change in EBIT into a larger change in earnings per share. Combined leverage multiplies the two. High leverage boosts profit growth in good years and deepens losses in bad ones, and it is highest just above break-even.
Worked example
Sales of 1,000,000 with variable costs of 600,000 leave a contribution margin of 400,000. After 250,000 of fixed costs EBIT is 150,000, so DOL = 400,000 ÷ 150,000 = 2.67. Interest of 50,000 leaves 100,000 before tax, so DFL = 150,000 ÷ 100,000 = 1.50 and DCL = 2.67 × 1.50 = 4.00. A 10% rise in sales lifts EBIT by 26.67% and EPS by 40.00%; break-even sales are 625,000.
Sources: Investopedia — Degree of Operating Leverage (DOL) · Corporate Finance Institute — Degree of Combined Leverage
Frequently asked questions
What does a high degree of operating leverage mean?
That fixed costs are large relative to profit. Profits grow quickly when sales rise but fall just as fast when sales drop — airlines, software and manufacturers typically have high DOL.
Why does DOL change with the level of sales?
DOL is highest near the break-even point, where EBIT is small, and falls as sales grow because the fixed costs become a smaller share of the contribution margin.
What does a negative DOL mean?
The company is operating below break-even (EBIT is negative). The magnitude still shows sensitivity, but the sign flips because a rise in sales reduces the loss.
How is DFL different from DOL?
DOL comes from fixed operating costs and links sales to EBIT; DFL comes from fixed financing costs (interest, preferred dividends) and links EBIT to earnings per share.
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Educational estimate, not accounting or investment advice. Analysts and auditors adjust these figures with their own definitions — use the exact definitions of your reporting framework or loan agreement.