Slow investing.
Strong outcomes.

Tools

Compound Interest Calculator

See how time, monthly investing and compounding can shape long-term growth. Use this calculator to see how money can grow over time. It shows how an initial investment and ongoing monthly contributions may compound over years or decades. This is one of the simplest ways to understand why starting early matters so much in long-term investing.

This tool is especially useful if you want to test how different starting points affect the final result. You can compare what happens if you begin now instead of later, increase your monthly amount gradually or stay invested longer. In many cases, the biggest difference does not come from investing huge sums at the start. It comes from giving compounding more time to work.

Good for: understanding long-term growth, comparing timelines, and seeing why regular investing matters.

Try this: compare starting today versus starting five or ten years later using the same monthly contribution.

Inputs

Results

Final value130 754 €
Total contributions61 000 €
Total growth69 754 €

Yearly growth chart

Year-by-year split of invested capital and growth (EUR)

048121620
YearContributionsGrowthTotal value
01 000 €0 €1 000 €
14 000 €165 €4 165 €
27 000 €552 €7 552 €
310 000 €1 175 €11 175 €
413 000 €2 053 €15 053 €
516 000 €3 202 €19 202 €
619 000 €4 641 €23 641 €
722 000 €6 391 €28 391 €
825 000 €8 473 €33 473 €
928 000 €10 911 €38 911 €
1031 000 €13 730 €44 730 €
1134 000 €16 956 €50 956 €
1237 000 €20 618 €57 618 €
1340 000 €24 747 €64 747 €
1443 000 €29 374 €72 374 €
1546 000 €34 535 €80 535 €
1649 000 €40 268 €89 268 €
1752 000 €46 612 €98 612 €
1855 000 €53 609 €108 609 €
1958 000 €61 307 €119 307 €
2061 000 €69 754 €130 754 €

Layering: your own capital vs growth

If you start 5 years later

Final value drops to 80 535 € with the same assumptions.