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Interest expense is the cost of borrowing money during the period. It appears on the income statement and reduces pre-tax income.
Interest expense represents the cost of borrowing money, including interest paid on bonds, bank loans, credit facilities, and other debt instruments. This financing cost appears below operating income on the income statement, directly reducing pre-tax profit. Interest expense is a fixed obligation—it must be paid regardless of business performance, making it a key measure of financial risk.
Components of interest expense:
- Bond interest: Coupon payments on corporate bonds
- Loan interest: Payments on bank term loans and revolving credit
- Finance lease interest: Interest portion of capital lease payments
- Amortisation of debt issuance costs: Non-cash portion
Cash flow note:
Interest expense on the income statement may differ from cash interest paid due to accruals and non-cash amortisation. The cash flow statement shows actual cash paid for interest.
Why interest expense matters:
- Fixed obligation: Must be paid regardless of revenue or profit levels
- Default trigger: Missing interest payments can trigger bankruptcy
- Profit reduction: Directly reduces earnings available to shareholders
- Tax deductible: Interest provides a tax shield (unlike dividends)
Interest coverage ratio:
Interest Coverage = Operating Income / Interest Expense
- > 5x: Strong coverage; low financial risk
- 3-5x: Adequate coverage for most businesses
- 1.5-3x: Thin margin of safety; monitor closely
- < 1.5x: High risk; may struggle to service debt
- < 1x: Cannot cover interest from operating income
Analysing interest expense:
- Trend: Rising interest expense indicates increasing leverage or higher rates
- Interest rate sensitivity: Variable-rate debt exposes company to rate changes
- Debt maturity: Refinancing may change interest expense significantly
- Net interest: Some companies report interest net of interest income
Context matters:
- Capital-intensive businesses: Higher interest expense may be appropriate
- Interest rate environment: Low rates make debt more affordable
- Growth investment: Debt financing growth may justify interest burden
Track interest expense relative to operating income and debt levels. Rising interest coverage indicates improving financial health; declining coverage signals increasing risk.