**XIRR** is an Excel built-in function that is used to calculate Internal Rate of Return (IRR) of irregular cash flows. Learn and understand the logic of XIRR Calculation in Excel

**MIRR** is an an improved version of IRR in Excel. You can use MIRR function to factor in financing cost of cash outflows and reinvestment rate of cash inflows to compute a more realstic IRR of cash flows. Get an insight into MIRR Calculation in Excel