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 · Ireland edition
What is compound interest?
Written in plain English for readers in Ireland.
Why it matters
It's the single most powerful force in long-term investing. Time matters more than timing.
A note for readers in Ireland
This lesson explains a global concept — the same idea applies to markets watched from Ireland 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 Ireland.
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Your capital is at risk. This is educational content only.
Same lesson, other markets
Educational content — not financial advice.