Lesson 26 - What is Debt?
Debt is simply money you borrow with the promise to pay it back later, usually with interest. It can feel scary, but debt is just a tool. Used wisely, it helps you achieve goals like studying, buying a house, or starting a business. Used poorly, it traps you in endless payments.
Case study: Emily and her student loan
Emily, 19, started university in Germany. She needed €8,000 per year for tuition and living expenses. Instead of dropping out, she took a student loan with a low 2% interest rate. After graduation, she landed a job earning €2,500 per month. Her monthly payment was €120, manageable compared to her salary. For Emily, debt was not a burden but an investment in her future. Her story shows that debt itself isn’t evil. The key is borrowing for something that increases your long-term opportunities, not for things that vanish quickly like clothes or gadgets.
What exactly is debt?
Debt is a financial obligation where one party borrows money and agrees to repay it, often with interest. The lender provides funds now, and the borrower promises repayment over time. Common forms include credit cards, student loans, mortgages, and car loans. Debt is everywhere, but the way you use it makes the difference between freedom and stress.
Types of debt

The cost of debt: interest
When you borrow, you usually pay more than you received. That extra is called interest. It’s the price of borrowing. Example: borrow €1,000 at 10% interest. After one year, you owe €1,100. If you don’t pay, interest may pile up, and the cost snowballs.
This chart shows how a €1,000 loan grows under different interest rates if unpaid for 5 years.
Good debt vs. bad debt
Good debt creates future value. Bad debt drains you. Borrowing for education or property can increase income or stability. Borrowing for luxury clothes or vacations usually does not. The distinction isn’t about emotion but about return on investment.
Mini-case study: The danger of credit cards
Jason, 20, got his first credit card. At first, he only used it for emergencies. But soon he started swiping for everything: clothes, dinners, and weekends away. Within a year, he had €3,000 in debt with 20% interest. His minimum payments barely covered the interest, so the debt didn’t shrink. Jason’s story is common. Credit cards can be useful tools, but without discipline they trap you in expensive cycles.
Summary
- Debt is borrowed money you must repay, often with interest
- Good debt builds future value, bad debt drains it
- Interest determines how costly borrowing becomes
Key Terms
Further Learning
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