The lesson
€5,000 is manageable. Ten years at 18% can make it €26,169.
This is a deliberately simple illustration: €5,000, a fixed 18% annual rate, no payments, no fees and no new borrowing.
The first year adds €900. After ten years, the balance is €26,169. At 8% under the same simplified conditions, it is €10,795. The €15,374 difference is the rate at work.
Real loans have their own payment schedules, fees and compounding rules. The useful first question is still the same: what is this balance costing per year?
