CALCULATOR
Compound Interest Calculator
Watch savings grow year by year as interest starts earning interest of its own.
€
€
%
years
Up to 60 years.
After 20 years
€43,816
€18,816 of that is interest, 43% of the final balance.
- Paid in
- €25,000
- Interest earned
- €18,816
- Interest earned on interest
- €5,866
Balance at the end of each year
Paid in Interest
Year 1Year 20
How the interest adds up
- Interest if it were only paid on what you put in
- €12,950
- Extra from interest earning interest
- €5,866
- Total interest with compounding
- €18,816
- Rough time for money to doubleThe rule of 72: 72 divided by 5.
- 14.4 years
Assumes a fixed rate compounded monthly, with each addition made at the end of the month. Real interest rates and returns change over time, and tax or fees can reduce growth. Educational content, not financial advice.