Debt-to-Equity Ratio Calculator (D/E)

D/E ratio — the leverage measure that runs every credit decision

Book against market D/E, and what Damodaran's industry averages say

Frequently asked questions

• Should I include short-term debt?+

  Yes — include all interest-bearing debt regardless of maturity. Long-term debt + current portion of long-term debt + commercial paper + short-term bank loans + finance leases. Exclude operating leases (which under ASC 842 / IFRS 16 now appear on the balance sheet but are operating obligations not financing), trade payables, and accrued expenses. The economic question D/E answers is "how much fixed-cost financing commits the firm" — all interest-bearing debt counts.

• What's "net" D/E?+

  Net D/E = (total debt − cash) ÷ equity. It treats cash as available to repay debt, which is reasonable if the cash is not needed to run the business. A company with more cash than debt has negative net debt. Use the same definition when comparing companies.

• Why do banks have such high D/E?+

  Banks are inherently leveraged businesses — they take deposits (liabilities/debt) and make loans (assets). A bank with $10B in deposits + $1B in equity has D/E of 10. Basel III regulations set minimum capital ratios that effectively constrain bank D/E to roughly 10-15× (Tier 1 capital ratio typically 8-12%). For banks, D/E doesn't convey financial distress signals the way it does for non-financials — the leverage is structural, not strategic. Bank credit analysis uses different metrics: NIM (net interest margin), CET1 ratio, NPL ratio, liquidity coverage ratio.

• What if equity is negative?+

  Negative book equity means accumulated losses exceed paid-in capital — D/E becomes mathematically meaningless (negative or undefined). Common in distressed firms, recent IPOs after large losses, or firms with large share buybacks reducing equity below paid-in capital. For these, use (a) market D/E if market equity is still positive (the firm has option value but accounting equity is gone), (b) Total Debt / Total Assets as an alternative leverage measure, (c) Total Debt / EBITDA which compares debt to cash-generation capacity. McDonald's, Boeing post-737 MAX, Starbucks at points have had negative book equity due to buybacks — none distressed, but D/E unhelpful.

• What's a "covenant" and how does D/E relate?+

  Loan covenants are conditions in the loan agreement that the borrower must maintain. Maintenance covenants require ongoing compliance — e.g. "D/E must remain below 2.5". Breaching triggers default → accelerated repayment or renegotiation. Incurrence covenants only activate at specific events (new debt issuance, dividends, M&A). D/E covenants are typically book-based because book values are auditable and don't fluctuate daily with markets. If your firm is approaching a covenant D/E ceiling, that's a credit-distress signal even if absolute leverage looks moderate.

• How does D/E feed into WACC?+

  D/E sets the weights in WACC. Recall WACC = (E/V) · re + (D/V) · rd · (1−Tc), where V = D + E. So WACC weights are derived directly from your D/E. Higher D/E → more weight on after-tax cost of debt → lower WACC (because debt is cheaper than equity). But higher D/E also raises rd (lenders demand more for leveraged firms) and raises re (equity becomes riskier with more debt above it). The WACC-D/E relationship is U-shaped: too little debt = expensive WACC (no tax shield); too much debt = expensive WACC (distress costs); optimum somewhere in the middle. See our WACC calculator to compute the full effect.

• Is preferred stock debt or equity?+

  Technically equity but economically often closer to debt. Cumulative preferred with fixed dividends behaves like perpetual debt — most analysts treat it as debt for capital structure analysis. Convertible preferred straddles depending on the conversion likelihood. Mandatory convertible behaves like equity. For D/E precision, separate preferred stock into a third bucket; for quick analysis, add preferred to either debt or equity based on its dominant economic nature. Most equity research adds preferred to debt for WACC purposes.

• Is anything I enter saved?+

  No. Debt, equity, market cap — every input stays in your browser. Book D/E, market D/E, debt-to-capital, equity multiplier computations all run as client-side JavaScript. Open DevTools → Network when you click Calculate and you'll see zero outbound requests. Safe for confidential capital-structure analysis.

• Where can I read more about capital structure?+

  Foundational: Modigliani F, Miller MH "The Cost of Capital, Corporation Finance and the Theory of Investment." American Economic Review 1958. The 1963 follow-up added corporate taxes. Trade-Off Theory: Myers SC "The Capital Structure Puzzle." JoF 1984. Industry averages: Damodaran's Debt Fundamentals dataset (January 2026), listed under Method & sources. ASEAN-specific: MAS, BNM, BI annual financial stability reports cover regional leverage trends.

• How does ASEAN capital structure differ from US?+

  Compare a company with peers in its own market and industry rather than with a single global norm. Borrowing costs, how developed the local bond market is and who controls the company all shape capital structure, so the same ratio can mean different things in different places. Damodaran publishes regional as well as US industry datasets, which are a better comparison than a US average.

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