This document discusses and compares three capital budgeting techniques: internal rate of return (IRR), modified internal rate of return (MIRR), and profitability index (PI). It defines each technique, provides their formulas, and lists their advantages and disadvantages. IRR is the discount rate that sets the net present value equal to zero. MIRR accounts for the practical reinvestment rate. PI is the ratio of a project's present value of cash flows to initial investment. Each technique considers the time value of money but they differ in their calculations and how they evaluate projects.