Last updated October 13, 2026 · Report an error
Degree of Operating Leverage measures how sensitive a company's operating income is to a change in sales, driven by how much of its cost base is fixed versus variable. A fixed-cost-heavy business has high DOL: profits swing hard in both directions as sales rise or fall.
How it works
Enter sales, variable costs, and fixed costs. Contribution margin = sales − variable costs; EBIT = contribution margin − fixed costs; DOL = contribution margin ÷ EBIT.
- Enter sales revenue.
- Enter total variable costs.
- Enter total fixed costs.
- Click Calculate to see your results.
Examples
A manufacturer
$500,000 in sales, $300,000 variable costs, and $100,000 fixed costs gives a contribution margin of $200,000, EBIT of $100,000, and a DOL of 2.0 — a 1% change in sales moves EBIT by roughly 2%.
Who should use it
- Assessing how sensitive a business's profits are to a sales downturn.
- Comparing operating risk between companies with different cost structures.
Industry applications
- Corporate finance
- Cost accounting and management accounting
Advantages
- Quantifies operating risk from cost structure alone.
- Directly derived from a standard contribution-margin income statement.
Limitations
- DOL itself varies with the sales level it's measured at — it's not a single fixed number for a company.
Common mistakes to avoid
- Comparing DOL across companies with very different sales levels without noting DOL itself changes as sales change (it's highest near the break-even point).
Best practices
- Use DOL alongside a break-even analysis — the two tell related but distinct stories about cost structure risk.
Tips
- See the Degree of Total Leverage Calculator to combine this with financial leverage for the full sales-to-EPS sensitivity.
Frequently asked questions
Neither inherently — it amplifies whatever direction sales move. High DOL is great in growth years and painful in downturns.
DOL is about the cost structure ABOVE the operating-income line (fixed vs. variable costs); DFL is about fixed interest expense BELOW that line. See the Degree of Total Leverage Calculator for both combined.