Loan Structures

A loan structure defines how borrowed principal, interest, and fees are paid over time. Two loans with the same principal and stated rate can create very different cash-flow and credit risks if one amortizes steadily while another defers principal to a balloon or bullet maturity.

This section focuses on back-ended repayment designs. These structures can reduce near-term payments, but they require explicit planning for later amortization, asset-sale proceeds, refinancing, or a large maturity payment.

Choose the Right Concept

The terms can overlap without being interchangeable. An interest-only loan can use bullet repayment if all principal is due when the interest-only period ends. A balloon loan normally amortizes some principal before maturity. A bullet instrument generally leaves most or all principal outstanding.

How Repayment Shape Changes Risk

Lower initial debt service does not necessarily mean lower cost or lower risk. Keeping principal outstanding can increase total interest, preserve collateral exposure, and make the borrower more dependent on future credit conditions.

How to Analyze a Loan Structure

1. Separate term from amortization. The legal maturity may occur years before the payment schedule would reduce principal to zero.
2. Map the full payment schedule. Include principal, interest, rate resets, fees, reserves, options, and the final payoff.
3. Track the balance. Determine when principal declines, stays level, or increases through capitalized interest.
4. Identify the maturity source. Distinguish cash already available from forecast cash flow, asset sales, or uncommitted refinancing.
5. Stress the structure. Test higher rates, lower collateral value, delayed income, reduced refinance proceeds, and transaction costs.
6. Read the documents. Covenants, prepayment terms, extensions, defaults, guarantees, and priority can alter the economic result.
7. Compare consistent alternatives. Use the same principal, term, rate assumptions, collateral, and fees when comparing structures.

Common Mistakes

• Comparing loans only by initial monthly payment or stated interest rate.
• Treating interest payments as principal reduction.
• Using “balloon,” “bullet,” and “interest-only” as synonyms without checking the schedule.
• Assuming an expected sale or refinancing is guaranteed.
• Ignoring final interest, fees, liens, and transaction costs in the maturity budget.
• Testing current debt-service coverage but not terminal repayment capacity.
• Assuming a lender must extend a loan because scheduled payments were made on time.

Loan obligations and remedies depend on the executed documents and applicable law. This section provides general financial education, not personalized borrowing, lending, investment, or legal advice.

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