Compound Interest Calculator
Forecast long-term growth with recurring contributions
How to Use This Compound Interest Calculator
Enter your starting balance, monthly contribution, expected annual return, and investment horizon. The calculator projects your future value and shows yearly contribution versus growth to make compounding easier to understand.
What Drives Results Most
- Time horizon: compounding accelerates later in the timeline.
- Contribution consistency: monthly deposits are often more impactful than chasing small return differences.
- Return assumptions: use realistic ranges and stress-test your plan.