Investment Calculator

This tool works backwards from an investment target instead of projecting a balance forward. Give it what you hold now, what you add each month and the return you expect, and it returns how long the target takes to reach; give it a deadline instead and it returns the annual return the target would need. Growth compounds monthly with contributions added at the end of each month, and the required return is found by bisection because no formula gives it directly. A steady return is an assumption you are making, so both answers are an estimate rather than a forecast or a quote from any provider.