Enter the initial investment, cash flows, and discount rate into the profitability index calculator. The calculator will display the PI ratio.

## Profitability Index Formula

The following formula is used to calculate the profitability index of an investment.

PI = NPV / I

- Where PI is the profitability index
- NPV is the present value of future cash flows
- I is the initial investment

Further, the npv of future cash flows can be calculated using the following formula.

CF_{1} × (1 + r)^{ -1} + CF_{2} × (1 + r)^{ -2} + . . .

- Where CF is the cash flows of each corresponding year
- r is the discount rate

How to calculate a profitability index

**First determine the initial investment and discount rate**This will be CF0 and r respectively in the formula above.

**Next, estimate the cash flows derived from the investment**Estimate the cash flows for each year following the investment.

**Finally, calculate the PI**Calculate the profitability index using the NPV of the cash flows and the initial investment.

## FAQ

**What is profitability index?**

Profitability index, or PI for short, is a term used in business to describe the ratio of an asset or investments profitability in the future. The higher the index ratio the more profitable an investment is. The PI depends on cash flows, investment amounts, and discount rates.

**How do you increase profitability index?**

The 3 ways to increase the PI is to decrease the discount rate, increase the cash flows, or decrease the initial investment amount.

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