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Compound Growth Calculator

Explore how a starting amount, monthly contributions, an assumed return, and time may interact.

InvestmentStocks.com Editorial TeamPublished August 3, 2026Last updated August 3, 20263 min read
Educational tool

Explore a hypothetical future value using a starting amount, recurring monthly contribution, annual return assumption, and time period. This calculator does not predict investment performance.

Estimated future valueEnter assumptions to calculate.

How the calculation works

The tool compounds the starting amount monthly and adds each monthly contribution. It assumes a constant return and does not deduct taxes, fees, inflation, or investment losses.

Why the result is not a forecast

Actual returns vary. A smooth annual assumption can hide volatility, sequence risk, behavioural decisions, taxes, fees, and changes in contribution patterns.