Investing regularly, even in small amounts, can build significant wealth over time thanks to the power of compound growth. Our investment calculator shows you the projected future value of your investments based on an initial lump sum, regular monthly contributions, an assumed annual return rate, and your investment horizon. You can model different scenarios — for example, what happens if you increase your monthly contribution by £50, or if markets return 5% rather than 7% per year. The calculator shows both the total amount you invest and the total growth, so you can see clearly how much of your final pot comes from your contributions versus investment returns. Remember that all investment returns are estimates — actual returns will vary.