Short answer
Earning returns on your previous returns. €1,000 growing at 8% per year becomes €2,159 after 10 years — without you adding a cent.
Lesson · 2 min read · Finland edition
What is compound interest?
Written in plain English for readers in Finland.
Why it matters
It's the single most powerful force in long-term investing. Time matters more than timing.
A note for readers in Finland
This lesson explains a global concept — the same idea applies to markets watched from Finland as anywhere else. Local rules, accounts, taxes and product availability vary and change over time, so we deliberately don't cover them here.
Educational content only — not tax, legal or investment advice. Always confirm current rules with a qualified professional in Finland.
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Your capital is at risk. This is educational content only.
Same lesson, other markets
Educational content — not financial advice.