Compound Interest Calculator

Initial Investment ($)

Monthly Contribution ($)

Interest Rate (% Annual)

Years to Grow

Compounding Frequency

Institutional Accuracy

Our algorithm uses the Beginning-of-Month (Annuity Due) model for contributions, which is the standard for high-precision wealth modeling. By applying an effective monthly rate derived from your chosen compounding frequency (Daily, Quarterly, etc.), we ensure that your interest is calculated exactly as it would be at a major financial institution.