Why Corporations Issue Bonds

Corporations issue bonds to raise capital more cheaply than equity. Debt is tax-deductible, dilutes fewer shareholders, and is often cheaper than the cost of equity. Understanding why companies choose debt shapes credit analysis and investment decisions.

Key takeaways

• Corporations issue bonds to fund capital expenditures, acquisitions, refinancing, and working capital—all without diluting ownership.
• Debt is often cheaper than equity because interest is tax-deductible and debt has priority in bankruptcy; equity holders require higher returns for higher risk.
• Leverage (borrowing) amplifies returns to shareholders in good times but increases financial risk in downturns.
• A corporation's ability to repay debt depends on its cash flow and profitability; weak or deteriorating cash flow increases default risk.
• Bond covenants protect creditors by limiting what the company can do with its assets and finances; violations can trigger acceleration and default.

The capital needs of corporations

Corporations need capital to operate and grow. Capital needs fall into several categories:

Capital expenditures (CapEx). Building factories, buying equipment, or upgrading technology. An auto manufacturer might spend billions on a new production facility. A telecom company might spend billions on 5G network build-out. A retailer might open new stores.

These CapEx projects take years to complete and return value slowly. A company cannot wait for operating cash flow to accumulate; it needs capital upfront.

Acquisitions. Buying another company (or a division). Acquisitions can create strategic value—expanding into new markets, acquiring customers, or eliminating competitors. A pharmaceutical company might acquire a smaller biotech company for $5 billion. A software company might acquire a competitor's product line. Acquiring companies need capital immediately.

Refinancing. When existing bonds mature, the company must repay them. If it does not have cash, it issues new bonds at prevailing rates. Refinancing risk arises if rates have risen sharply. A company that borrowed at 2% five years ago might have to refinance at 5% today, dramatically increasing interest expense.

Working capital. Operating businesses need cash to fund inventory, receivables, and payroll before revenue comes in. A retailer might need to buy inventory before the holiday season. A manufacturing company has cash tied up in parts and work-in-progress. Bonds can fund this gap, though shorter-term credit facilities (lines of credit) are more common for working capital.

Shareholder returns. Some companies use borrowed money to pay dividends or buy back stock. This is controversial because it increases financial risk without creating new assets. Nonetheless, many corporations leverage to return cash to shareholders.

Why debt is often cheaper than equity

A fundamental principle of corporate finance is that debt is often cheaper than equity. Here is why:

Tax deductibility. A corporation pays interest on debt as an expense, reducing taxable income. If a company borrows $100 million at 5% per year, it pays $5 million in interest and deducts that from taxable income, reducing taxes by roughly $1.25 million (assuming a 25% tax rate). The net cost of debt is therefore roughly 3.75% (5% minus the tax benefit).

Equity is not tax-deductible. Shareholders receive dividends or capital gains, and the company is not deducted. This makes equity more expensive from a tax perspective.

Priority in bankruptcy. Debt is senior to equity. In bankruptcy, debt must be paid before equity holders receive anything. This seniority means debt is less risky than equity, so investors accept lower returns on debt than on equity.

Investor risk perception. A bondholder knows they will receive fixed coupon payments and principal repayment (barring default). An equity holder faces uncertainty. This certainty allows companies to borrow at lower rates than the cost of equity.

Cost of equity is high. The cost of equity—the return shareholders require—is typically 8 to 12% per year, much higher than the cost of debt (3 to 7%). Using cheap debt to fund projects that return more than the cost of debt increases value to shareholders.

Suppose a company can fund a $100 million factory that will return 8% per year in cash flow. If the company borrows at 5% and the cost of equity is 10%, it is advantageous to finance the factory with debt, not equity. The debt costs 5%, the project returns 8%, and the equity holders benefit from the 3% spread.

Capital structure: the mix of debt and equity

Every corporation has a capital structure—a mix of debt and equity financing. Some companies are heavily equity-financed (low leverage); others are heavily debt-financed (high leverage).

A company's optimal capital structure depends on its business characteristics:

Stable, predictable cash flow. Utilities (electric companies, water companies) have stable cash flows. They can safely carry high levels of debt because they reliably generate cash to service it. Most utilities are 50% or more debt-financed.

Cyclical, volatile cash flow. Retailers and auto manufacturers have cyclical cash flows that vary with the economy. High debt in a downturn can be dangerous. These companies typically carry moderate debt levels, maintaining some equity cushion.

High-growth, risky business. Startups and biotech companies often have no profits and uncertain futures. They carry little debt because they cannot reliably service it. They raise capital through equity, accepting dilution in exchange for financial flexibility.

Mature, cash-generative business. An established software company with steady cash flow and low capital needs might carry substantial debt because it can easily service it and benefit from the tax advantages.

A company that borrows moderately—using debt to fund projects that return more than the cost of debt—increases shareholder value. But a company that borrows excessively—leveraging beyond its ability to service debt safely—increases financial risk and may face distress or default.

How companies access the bond market

When a large company needs to borrow, it works with investment banks to arrange a bond offering. The process typically looks like this:

1. Planning. The company decides how much to borrow, what maturity, and what coupon it is willing to offer.

2. Roadshow. The company's management presents to large investors (pension funds, insurance companies, mutual funds, asset managers) explaining the company's business, financial condition, and use of proceeds.

3. Pricing. Based on investor feedback, the underwriter (investment bank) prices the bond. If the company is creditworthy and market conditions are favorable, the bond might be priced to yield 4%. If the company is riskier or market conditions are stressed, the yield might be 6% or higher.

4. Sale. The bonds are sold to investors. A large bond offering might be purchased by 100 or more institutional investors.

5. Secondary trading. After issuance, bonds trade in the secondary market. Investors can buy and sell, creating liquidity.

Once issued, a bond is a legal obligation. The company must pay the coupon on schedule and repay the principal at maturity, regardless of financial performance.

Credit quality and bond ratings

A company's ability to service debt depends on its profitability, cash flow, and leverage. Credit rating agencies (Moody's, S&P, Fitch) assess this ability and assign ratings:

• Investment-grade: BBB- (S&P) or Baa3 (Moody's) and above. These ratings indicate low default risk. Investment-grade companies include most large, established corporations.
• High-yield (junk): Below BBB-. These ratings indicate material default risk. High-yield companies include smaller, riskier businesses or companies with high leverage.

A company with a strong business, high cash flow, and low leverage might be rated AAA or AA. A company with weak cash flow, high leverage, or cyclical business might be rated BB or B.

Ratings change as company fortunes change. A company facing declining revenue or rising debt might be downgraded. A downgrade typically causes the company's bonds to fall in price (as investors demand higher yields for the increased risk) and makes refinancing more expensive.

Large companies are closely followed by analysts, so their ratings are relatively stable. Smaller companies' ratings can be volatile.

Leverage and financial risk

Leverage—borrowing to amplify returns—is powerful but risky. A simple example illustrates:

Suppose two companies each have $1 billion in assets and earn 10% per year ($100 million).

• Company A (unleveraged): Financed entirely by $1 billion in equity. Earnings of $100 million go to equity holders. Return on equity is 10%.

• Company B (leveraged): Financed by $600 million in equity and $400 million in debt at 5% interest. Earnings are $100 million. Interest expense is $20 million. Earnings available to equity holders are $80 million. Return on equity is $80 million / $600 million = 13.3%.

Company B's shareholders earn higher returns because they are leveraging cheap debt (5%) against assets returning 10%. The spread (10% - 5% = 5%) is multiplied by the leverage (the debt), increasing returns.

However, leverage amplifies losses too:

If earnings fall to 6% per year ($60 million):

• Company A: Return on equity is 6%.
• Company B: After interest expense of $20 million, equity earns only $40 million on $600 million in equity. Return on equity is 6.7%.

Wait, Company B still has higher returns? Let's go further. If earnings fall to just 4% per year ($40 million):

• Company A: Return on equity is 4%.
• Company B: After $20 million interest expense, equity earns only $20 million on $600 million equity. Return on equity is 3.3%.

Now leverage works against shareholders. In a severe downturn:

If earnings fall to 1% per year ($10 million):

• Company A: Return on equity is 1%.
• Company B: After $20 million interest expense, the company has negative earnings of -$10 million. It is losing money. If this persists, the company cannot service its debt and faces default.

This is the leverage trap. Moderate leverage magnifies returns in good times, but excessive leverage creates financial distress in downturns. Companies must balance the benefits of cheap debt financing against the risk of financial distress.

When corporations refinance debt

As bonds mature, corporations must repay the principal. If the company does not have cash, it issues new bonds (refinances).

Refinancing risk arises if interest rates have risen. A company that issued 10-year bonds at 3% five years ago must refinance at higher rates. The interest-expense burden rises, compressing profits.

In 2022, when the Federal Reserve raised rates sharply, many corporations faced high refinancing costs. Some companies that had leveraged excessively at low rates faced a wall of maturing debt and higher refinancing rates. This triggered credit downgrades and higher borrowing costs.

Strong companies can refinance at any rate because lenders believe they can service the debt. Weak companies face refinancing pressure; if rates are very high, they may not be able to refinance and could face default.

Covenants and bondholder protections

Bond indentures include covenants that protect bondholder interests. These typically include:

Financial covenants. The company must maintain certain financial ratios—minimum interest coverage (EBIT to interest expense), minimum current ratio (current assets to current liabilities), or maximum leverage (debt to EBITDA).

Negative covenants. The company cannot:

• Sell a large portion of its assets without bondholder approval.
• Exceed a certain debt level.
• Pay dividends if it would impair ability to service debt.
• Enter into a merger without maintaining investment-grade rating.

If a company breaches a covenant, bondholders can demand acceleration (immediate payment of all remaining principal and interest). This creates strong incentives to stay in compliance.

Cross-default clauses. If a company defaults on one debt obligation, it is in default on all debt. This prevents companies from selectively defaulting on one bond while paying others.

These protections limit management's flexibility but reduce bondholder risk.

Summary: corporations use debt strategically

Corporations issue bonds because debt is often cheaper than equity and tax-deductible. Strategic use of leverage—borrowing to fund projects with returns higher than the cost of debt—increases shareholder value. But excessive leverage creates financial risk. Balancing the benefits of cheap financing against financial risk is a core challenge of corporate finance.

Understanding why companies borrow, what debt levels are sustainable, and how covenant violations can trigger distress is essential for bond investors assessing credit quality.

Related concepts

• Bonds as Loans
• Why Governments Issue Bonds

Next

Corporations issue bonds for capital needs; governments issue bonds for fiscal deficits. Together, corporate and government bonds make up the vast majority of the global bond market. The next step is to understand the sheer size of the bond market—how it compares to the stock market and why it is often overlooked in financial discourse.

---

Corporate capital structure and leverage