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 value | 130 754 € |
|---|---|
| Total contributions | 61 000 € |
| Total growth | 69 754 € |
Yearly growth chart
Year-by-year split of invested capital and growth (EUR)
| Year | Contributions | Growth | Total value |
|---|---|---|---|
| 0 | 1 000 € | 0 € | 1 000 € |
| 1 | 4 000 € | 165 € | 4 165 € |
| 2 | 7 000 € | 552 € | 7 552 € |
| 3 | 10 000 € | 1 175 € | 11 175 € |
| 4 | 13 000 € | 2 053 € | 15 053 € |
| 5 | 16 000 € | 3 202 € | 19 202 € |
| 6 | 19 000 € | 4 641 € | 23 641 € |
| 7 | 22 000 € | 6 391 € | 28 391 € |
| 8 | 25 000 € | 8 473 € | 33 473 € |
| 9 | 28 000 € | 10 911 € | 38 911 € |
| 10 | 31 000 € | 13 730 € | 44 730 € |
| 11 | 34 000 € | 16 956 € | 50 956 € |
| 12 | 37 000 € | 20 618 € | 57 618 € |
| 13 | 40 000 € | 24 747 € | 64 747 € |
| 14 | 43 000 € | 29 374 € | 72 374 € |
| 15 | 46 000 € | 34 535 € | 80 535 € |
| 16 | 49 000 € | 40 268 € | 89 268 € |
| 17 | 52 000 € | 46 612 € | 98 612 € |
| 18 | 55 000 € | 53 609 € | 108 609 € |
| 19 | 58 000 € | 61 307 € | 119 307 € |
| 20 | 61 000 € | 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.