Corporate debt is money a company borrows under a contract to repay by a specific date, with interest along the way. Along with selling ownership shares, borrowing is one of the two main ways businesses raise capital, and the U.S. market for corporate bonds and loans runs into the trillions of dollars at any given moment. How a company structures that borrowing, and how much of it the business can safely carry, says a great deal about both its ambitions and its vulnerabilities.
The Basic Contract
At its core, corporate debt is a contract. The company receives a lump sum (the principal) and agrees to pay it back by a set date (the maturity date), plus periodic interest payments in between. The interest rate can be fixed for the life of the loan or float with a benchmark, adjusting over time. Those interest payments are what the lender earns for tying up their money and accepting the risk that the borrower might not repay.
Debt shows up on the company’s balance sheet as a liability, and that placement matters. It creates a legal obligation that ranks ahead of shareholders. If the company liquidates, creditors get paid from whatever assets remain before shareholders see anything. Lenders accept a capped return in exchange for standing first in line; shareholders accept more risk in exchange for unlimited upside if the business does well.
This ranking is also why companies often prefer borrowing over selling new stock. Issuing shares dilutes existing owners, shrinking their percentage of the company with every new share sold. Debt avoids that. The original shareholders keep their full stake, and the cost of borrowing is often lower than the returns shareholders expect, especially once tax treatment is factored in.
The Main Types of Corporate Debt
The important distinctions come down to how long the company has to repay, whether specific assets back the loan, and where the lender sits in the repayment order.
Short-Term and Long-Term
Short-term debt matures within a year and covers day-to-day cash needs: paying suppliers, making payroll during a slow month, bridging the gap between shipping goods and collecting payment. Commercial paper and revolving credit lines are the common instruments. Commercial paper is essentially an unsecured IOU issued by large, financially strong companies, usually at a lower cost than a bank loan.
Long-term debt runs beyond a year and funds bigger commitments: building a factory, buying a competitor, launching a new product line. Corporate bonds and multi-year term loans dominate here. The longer horizon lets the company line up its repayment schedule with the revenue the investment is expected to generate, rather than trying to repay before the project produces returns.
Secured and Unsecured
Secured debt is backed by specific assets, such as a mortgage on a building, equipment, or inventory. If the company defaults, the lender can seize and sell that collateral to recover its money. The collateral lowers the lender’s risk, which translates into a lower interest rate for the borrower.
Unsecured debt, often called a debenture in the bond market, has no specific collateral behind it. The lender relies on the company’s overall financial strength. Because there is nothing to seize if things fall apart, unsecured lenders charge higher interest rates.
Senior and Subordinated
Not all debt is equal when a company cannot pay everyone. Senior debt gets repaid first. Subordinated debt only gets paid after senior creditors are made whole. In a Chapter 7 liquidation, federal bankruptcy law sets a strict priority ladder: secured creditors are paid from collateral proceeds, then priority unsecured claims like employee wages, then general unsecured creditors, and finally, if anything is left, shareholders.1Office of the Law Revision Counsel. 11 USC 726 – Distribution of Property of the Estate Sitting lower in that order is why subordinated debt pays higher interest than senior debt.
Bonds, Bank Loans, and Convertibles
Corporate bonds are the most visible form. Each bond represents a loan from the investor to the company, with a stated interest rate (the coupon) and a maturity date, and bonds trade on secondary markets so an investor need not hold one to maturity.2U.S. Securities and Exchange Commission. Investor Bulletin: What Are Corporate Bonds
Bank loans work differently. A term loan is a lump sum with a fixed repayment schedule, often tied to a specific purchase like equipment or real estate. A revolving credit facility works more like a corporate credit card: the company can borrow up to a set limit, repay, and borrow again as needs shift. Bank loans generally do not trade on open markets the way bonds do, but they can be customized with terms a standardized bond cannot easily accommodate.
Convertible bonds blend the two worlds. The investor lends money and collects regular interest, but also holds an option to convert the bond into a set number of shares at a predetermined price.3Investor.gov. Convertible Securities If the stock climbs above that conversion price, the investor can swap the bond for shares worth more than its face value. Companies use convertibles to offer a lower interest rate; investors accept less current income in exchange for potential equity upside. The trade-off for existing shareholders is dilution if conversion happens.
Credit Ratings and What They Cost You
Before a company issues bonds, credit rating agencies evaluate how likely it is to repay. Moody’s, S&P, and Fitch assign letter grades that fall into two broad buckets: investment grade and non-investment grade (also called high-yield or junk). The line sits between BBB- and BB+ on the S&P and Fitch scales.4U.S. Securities and Exchange Commission. Investor Bulletin: The ABCs of Credit Ratings
That one notch carries heavy consequences. Investment-grade issuers can borrow at relatively low rates because pension funds, insurance companies, and other conservative institutions are allowed to buy their bonds. Slip below the investment-grade threshold and the pool of willing lenders shrinks. The buyers who remain demand higher yields to compensate for the added risk.
A downgrade also hits bonds already outstanding. Because existing bonds carry fixed coupons, their prices fall on secondary markets when investors reprice the risk, so current bondholders take paper losses and the company’s next round of borrowing gets more expensive.2U.S. Securities and Exchange Commission. Investor Bulletin: What Are Corporate Bonds Ratings shift over time with earnings, industry conditions, and management decisions.
Covenants: The Rules Attached to the Loan
Lenders don’t just hand over money and hope. Loan agreements and bond indentures include covenants, contractual rules the borrower must follow for the life of the debt. Covenants exist because lenders cannot vote on corporate decisions the way shareholders can, so they write protective guardrails into the contract instead.
Affirmative covenants require the company to do certain things: maintain insurance, provide audited financial statements on schedule, comply with applicable laws, and keep accounting records in order. Negative covenants restrict what the company can do. The most common versions set financial ratio floors and ceilings, such as capping total debt at a certain multiple of earnings or requiring interest coverage to stay above a minimum. Others limit additional borrowing, restrict dividends, or bar the sale of major assets without lender approval.
Violating a covenant, even a technical one that has nothing to do with a missed payment, can trigger serious consequences. The lender may raise the interest rate, demand immediate repayment, or renegotiate on less favorable terms. Most breaches lead to a negotiation rather than an immediate call of the loan, but the borrower enters that conversation from a weak position.
The Metrics That Show Whether Debt Is Manageable
A short list of ratios tells you most of what you need to know about whether a company’s debt load is manageable or dangerous. None of them means much in isolation. What counts as healthy varies by industry: a utility routinely carries far more debt relative to equity than a software company, and that is normal because utilities generate stable, predictable cash flows.
Debt-to-Equity
The debt-to-equity ratio divides total liabilities by total shareholders’ equity. A ratio of 1.5 means the company owes $1.50 for every $1.00 of equity. Higher ratios signal heavier reliance on borrowed money, which amplifies both gains and losses. Capital-intensive industries like manufacturing and telecom routinely run at levels that would alarm investors in consulting or software.
Interest Coverage
The interest coverage ratio divides earnings before interest and taxes by interest expense. It answers a straightforward question: can the company comfortably afford its interest from operating profits? A ratio of 5.0 means earnings are five times interest owed. A ratio near 1.0 means earnings barely cover interest, leaving almost nothing for taxes, reinvestment, or surprises. Below 1.0, operating income is not enough to pay lenders, which is a serious warning sign.
Debt-to-Assets
The debt-to-assets ratio divides total liabilities by total assets. A ratio of 0.40 means 40 cents of every dollar of assets was financed by creditors rather than owners. As the number rises, more of the company’s value effectively belongs to lenders, and the cushion protecting those lenders shrinks. It complements the debt-to-equity ratio by capturing the same leverage story from a different angle.
Why Even Profitable Companies Borrow
The single biggest reason profitable companies carry debt is the tax treatment of interest. Under federal tax law, a company can deduct interest paid on its indebtedness from taxable income.5Office of the Law Revision Counsel. 26 USC 163 – Interest If a company pays $10 million in interest at a 21% corporate tax rate, the deduction saves $2.1 million. Dividends paid to shareholders are not deductible. That asymmetry makes debt financing structurally cheaper than equity financing after taxes, and it is why even cash-rich companies often borrow.
The deduction is not unlimited. Section 163(j) caps deductible business interest in a given year at 30% of adjusted taxable income, plus business interest income and certain floor plan financing interest.5Office of the Law Revision Counsel. 26 USC 163 – Interest Companies that borrow aggressively may find part of their interest expense nondeductible in the current year, though the disallowed amount can carry forward.6Internal Revenue Service. Questions and Answers About the Limitation on the Deduction for Business Interest Expense
The tax savings make debt attractive, but the strategic appeal is leverage. When a company earns a higher return on its investments than the after-tax cost of the debt used to fund them, the excess flows to shareholders. Borrow at 5%, earn 12% on the project, and shareholders keep the spread. The danger is symmetrical. Interest payments are fixed obligations owed regardless of whether revenue is up, down, or gone. A company earning well above its interest burden has wide margin for error. A company barely covering interest has none. If earnings fall below the interest line, the company burns cash, risks covenant violations, and drifts toward default.
When Corporate Debt Goes Wrong
Default comes in two forms. A payment default is a missed interest or principal payment, the version most people picture. A technical default is less dramatic but still serious: the company breaks a covenant, such as breaching a required financial ratio, without missing a payment. Both types give lenders the right to demand immediate repayment of the full balance, though technical defaults more often lead to renegotiation.
Refinancing Risk
Most companies do not plan to repay long-term debt entirely from operating cash flow. They refinance, issuing new debt to pay off maturing obligations. That works smoothly in normal markets and becomes dangerous when large amounts of debt come due during periods of high interest rates or tight credit. A company that borrowed at 4% and needs to refinance at 6% faces a painful jump in interest expense that flows straight to the bottom line, even if the business itself has not changed.
The risk is worse for lower-rated borrowers. When credit tightens, investors get pickier, and speculative-grade issuers can find the refinancing window partly or fully shut. The most exposed companies are those with large maturities packed into a narrow time window, sometimes called a maturity wall.
Chapter 11 and the Priority Ladder
When a company cannot meet its debt obligations, federal bankruptcy law provides a structured process. Chapter 11 reorganization allows the company to keep operating while it negotiates a plan to restructure its debts. Existing management typically stays in control as a debtor in possession, rather than being replaced by an outside trustee.7United States Courts. Chapter 11 – Bankruptcy Basics
Whatever the plan, priority rules govern who gets paid and in what order. Secured creditors have first claim on collateral. Beyond that, the Bankruptcy Code ranks unsecured claims in a detailed sequence, with administrative expenses and employee wages ahead of general unsecured creditors, who sit ahead of equity holders.8Office of the Law Revision Counsel. 11 USC 507 – Priorities Shareholders are last, which is why equity in a bankrupt company is often wiped out entirely. That same ladder is why secured, senior debt carries lower interest rates in the first place: those lenders know that if everything falls apart, they are first to recover.