Capital Structure — The Dollar Dictionary

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Finance

Capital Structure

The mix of debt and equity a company uses to finance its operations and growth.

The two components are debt (bonds, bank loans, credit facilities — borrowed money that must be repaid with interest) and equity (shares sold to investors — ownership stakes that don't require repayment but dilute existing shareholders). The optimal mix minimizes the overall cost of capital while maintaining enough financial flexibility to weather downturns.

Modigliani and Miller's famous theorem suggested that in a perfect world, capital structure doesn't affect firm value. In the real world, it matters enormously: interest payments are tax-deductible (making debt cheaper than it appears), too much debt creates financial distress risk, and different structures send different signals to investors. Managing capital structure is one of the CFO's core responsibilities.

Capital structure is how you decide to pay for your house — how much mortgage versus how much cash down payment. A company's capital structure is the same decision at business scale: how much borrowed money versus how much investor equity funds the operation. The mix determines your financial risk and your cost of capital.

Real world: Apple carries substantial long-term debt — over $100 billion — despite sitting on enormous cash reserves. Why? Because interest rates were historically low and Apple could borrow cheaply to fund share buybacks and dividends, returning capital to shareholders without paying the higher tax cost of repatriating overseas cash. Their capital structure is a deliberate financial strategy, not a sign of financial weakness.

💡 Capital structure determines how a company is financially built — the right mix of debt and equity reduces cost of capital while keeping enough flexibility to survive unexpected downturns.

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