Last updated October 4, 2026 · Report an error
Degree of Financial Leverage (DFL) measures how sensitive a company's earnings per share (EPS) is to a change in operating income (EBIT), driven by how much fixed interest expense sits below the operating-income line on the income statement. Financial leverage exists whenever a company borrows money — the interest it owes is a fixed obligation that must be paid regardless of how the business performs, and that fixed cost is precisely what makes EPS swing harder as EBIT moves. A company funded entirely with equity (no debt) has a DFL of exactly 1.0 — a 1% change in EBIT produces exactly a 1% change in EPS, since there's no fixed interest expense to amplify the swing. As a company takes on more debt relative to its earnings, DFL rises above 1.0, meaning EPS becomes increasingly volatile in both directions: a strong year magnifies returns to shareholders, but a weak year magnifies losses just as sharply. Analysts and lenders watch DFL specifically to understand this amplification effect on the equity holders' bottom line.
How it works
Enter EBIT (earnings before interest and taxes) and the company's interest expense for the period. The tool first computes earnings before tax (EBT) as EBIT minus interest expense, then calculates DFL as EBIT divided by EBT. Because interest expense is fixed regardless of how much EBIT fluctuates, a smaller EBT relative to EBIT (meaning interest takes up a larger share of operating income) produces a higher DFL, since that fixed cost is dividing a proportionally larger amplification into the change that flows down to EPS.
- Enter eBIT (operating income).
- Enter interest expense.
- Click Calculate to see your results.
Examples
A moderately leveraged company
$100,000 EBIT with $20,000 interest expense gives an EBT of $80,000 and a DFL of 1.25 (100,000 ÷ 80,000) — a 1% change in EBIT moves EPS by roughly 1.25%.
A heavily leveraged company
$100,000 EBIT with $60,000 interest expense gives an EBT of just $40,000 and a DFL of 2.5 (100,000 ÷ 40,000) — the same 1% EBIT change now moves EPS by roughly 2.5%, showing how much more debt amplifies volatility.
A debt-free company
$100,000 EBIT with $0 interest expense gives an EBT of $100,000 and a DFL of exactly 1.0 — EPS moves in exact lockstep with EBIT, with no leverage-driven amplification at all.
Who should use it
- Assessing how debt financing affects EPS sensitivity.
- Comparing capital structure risk between companies.
- Modeling how a proposed new debt issuance would change EPS volatility.
Industry applications
- Corporate finance
- Equity research and valuation
Advantages
- Directly quantifies how debt financing amplifies EPS volatility.
- Simple to calculate from an income statement.
- Widely used and understood in corporate finance and equity analysis.
Limitations
- A snapshot at one EBIT level — DFL itself shifts as EBIT changes.
- Doesn't by itself indicate whether the underlying debt level is prudent or excessive.
Common mistakes to avoid
- Ignoring DFL when comparing two companies' EPS volatility that have similar operations but very different debt loads.
- Treating DFL as a fixed, permanent number rather than a snapshot that shifts as EBIT and interest expense change.
- Confusing DFL with Degree of Operating Leverage, which measures a different (cost-structure, not capital-structure) source of earnings sensitivity.
Best practices
- Review DFL alongside interest coverage ratios (like Times Interest Earned) to judge whether the leverage is at a comfortable level relative to earnings.
- Recalculate DFL using projected or forward-looking EBIT and interest figures when assessing future risk, not just historical numbers.
- Compare DFL across companies in the same industry, since acceptable leverage levels vary significantly by sector.
Tips
- Pair with the Degree of Operating Leverage Calculator to see the full picture from sales down to EPS.
- Use the Degree of Total Leverage Calculator if you want one number combining both operating and financial leverage.