What Is the Payback Period? The Payback Period is the amount of time it takes for an investment to generate enough cash flow to recover the original amount of money invested. In plain English, it tells you how long your money is tied up before you earn your initial investment back. The basic idea looks like this: Payback Period = Initial Investment ÷ Annual Cash Flow

What Is Internal Rate of Return (IRR)? Internal Rate of Return (IRR) is the annual percentage rate of return an investment is expected to earn over its lifetime, taking into account the timing of all cash flowing into and out of the investment. Simply put, IRR helps answer one of the most important investing questions: "What annual return am I really earning on this investment?"

What Is Net Present Value (NPV)? Net Present Value (NPV) is a financial calculation that determines whether an investment is expected to make or lose money after accounting for the time value of money. In simple terms, it compares the value of future cash you'll receive to the amount of money you have to invest today. The idea is based on a simple truth: A dollar today is worth more than a dollar received years from now...

What Is Discounted Cash Flow (DCF)? If you've ever wondered how investors decide what a business is really worth, one of the most important tools they use is Discounted Cash Flow (DCF). Discounted Cash Flow (DCF) is a valuation method that estimates the value of an investment based on the amount of cash it is expected to generate in the future. Since a dollar received today is worth more than a dollar received years from now, DCF adjusts—or "discounts"—future cash flows bac