There's a version of financial conservatism that treats all debt as a warning sign. Zero-debt balance sheets are celebrated. High-debt companies are approached with suspicion, sometimes dismissed entirely. I understand the instinct — debt amplifies both gains and losses, and companies that borrowed too much at the wrong time have caused some of the most spectacular failures in market history. But the blanket hostility to leverage misses something important about how value is actually created.
Debt is a tool. Like any tool, the question is whether it's being used correctly.
The Core Framework: Return vs Cost
The logic of good debt is simple. If a business can borrow at 8% and deploy that capital into projects that return 20%, borrowing is value-accretive. Every unit of debt taken at those economics creates equity value. This is the fundamental premise behind leveraged buyouts, infrastructure financing, and most corporate capital structure decisions. The math works until the return on invested capital drops below the cost of debt — at which point leverage destroys value instead of creating it.
This means the question to ask about any company with significant debt isn't "how much debt do they have?" It's "what return are they generating on the capital that debt is funding, and is that return reliably above the cost?" A company with 4x net debt to EBITDA generating 25% ROIC is in a structurally better position than a company with 1x net debt to EBITDA generating 9% ROIC. The first company's debt is creating value. The second's barely covers its cost.
Value creation from debt = (ROIC − Cost of Debt) × Capital Deployed. Positive spread, value is created. Negative spread, value is destroyed. Leverage amplifies whichever direction that spread is pointing. This is why highly leveraged businesses with strong returns can be great investments — and why companies with modest leverage but weak returns are often value traps despite looking "safe."
What Makes Debt Dangerous
Debt becomes genuinely dangerous when it's used to fund the wrong things, taken in the wrong structure, or held by the wrong type of business. Let me break those apart.
Funding the wrong things: using debt to fund dividends, share buybacks at inflated prices, or acquisitions at full valuations is a path to balance sheet destruction. None of those uses generates a return on the capital. You're borrowing to distribute or to overpay — both reduce equity value. Companies that do this under pressure to appear shareholder-friendly, while their underlying business deteriorates, are some of the most dangerous investments you can make.
The wrong structure: short-term debt funding long-term assets is a classic mismatch. If your assets generate cash over 10 years but your debt comes due in 2, you need the credit markets to cooperate every 2 years. When they don't — which happens in exactly the conditions where your business is also under pressure — you face a liquidity crisis that can be terminal even for a fundamentally sound business. India's NBFC crisis of 2018–19 was largely a story of asset-liability mismatch made catastrophic by a sudden liquidity tightening.
"The most dangerous leverage is the kind that looks fine until it suddenly isn't. That usually means short-term debt, variable-rate debt, or debt covenanted against metrics that deteriorate in a downturn — right when you most need headroom."
The Business Type Problem
Some businesses can carry significant debt safely; others cannot. The difference is in the nature and predictability of their cash flows. A toll road generating ₹500 crore of predictable annual cash flow can comfortably service ₹3,000–4,000 crore of debt. The cash flows are contractual, government-backed, and grow with inflation. A consumer discretionary company generating ₹500 crore of EBITDA in a good year but ₹100 crore in a recession should not have ₹3,000 crore of debt — the cash flows are too cyclical to reliably service fixed obligations.
This is why utilities, infrastructure companies, and REITs routinely carry high leverage without it being a red flag — their cash flows have the characteristics that support it. And why you should be nervous about cyclical businesses, early-stage companies, or businesses in disrupted industries carrying the same leverage ratios. The number doesn't tell you the risk. The nature of the cash flows does.
How I Use This in Practice
When I'm analyzing a company with material debt, I run three questions in sequence. First: what is the return on invested capital, and is it consistently above the cost of capital? If yes, the debt is potentially value-accretive. If no, I need to understand why and whether that gap is closing. Second: what is the debt structure? I want to see long-duration, fixed-rate debt aligned with the life of the assets it's funding. Short-duration or variable-rate debt raises the question of refinancing risk. Third: what happens to debt serviceability in a stress scenario? Not the base case — the scenario where revenue falls 20% and margins compress. If the coverage ratio still holds with reasonable cushion in that scenario, the debt is manageable. If it breaks, the equity is effectively an option on business survival.
Companies that pass all three of those questions comfortably, with debt that's being used to fund genuinely high-return investment, are often some of the best long-term investments available. The market sometimes penalizes them reflexively for carrying leverage, which creates an opportunity for investors who've done the work and understand what the debt is actually doing. That gap between perceived risk and actual risk is where a lot of the most interesting value in equity markets lives.