The formula for calculating savings account interest uses the initial deposit, the annual interest rate and the years of ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. David Kindness is a Certified Public Accountant (CPA) and an expert in the fields of ...

ROI is an important measure of an investment's performance but it has some drawbacks. Andrew Beattie was part of the original editorial team at Investopedia and has spent twenty years writing on a ...

IRR measures the rate needed to break even on an investment. Calculate IRR by setting NPV to zero and solving for the discount rate. Use Excel's IRR function by inputting initial cost and cash inflow.