This document provides information on estimating the cost of capital for a company. It discusses major sources of capital including common stock, preferred stock, debt through bonds or loans, and retained earnings. It then provides details on estimating the cost of debt and equity. For cost of debt, it shows an example calculation using interest rate and tax rate. For cost of equity, it discusses using the dividend growth model and the capital asset pricing model (CAPM) to estimate required rate of return. It lists some pros and cons of each approach.