Compound Interest
Explore savings with monthly compounding and contributions.
Your estimate
Enter your values, then select Calculate.
How this is calculated
Assumes a constant annual nominal rate divided by 12, monthly compounding, and contributions at the end of each month. Balance = P(1+r)n + C((1+r)n−1) ÷ r. At 0%, balance = P + C × n. Investor.gov calculator.
An illustration, not a guaranteed return. Excludes fees, taxes, inflation and market variability.