# Cash Flow Per Period Of A Project

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Payback Period is the time in which the initial cash outflow of an investment is expected to be recovered from the cash inflows generated by the investment. It is one of the simplest investment appraisal techniques. Formula The formula to calculate payback period of a project depends on whether the cash flow per period of the project is even or uneven. In case they are even, the formula to calculate payback period is: Payback Period = Initial Investment Cash Inflow per Period When cash inflows are uneven, we need to calculate the cumulative net cash flow for each period and then use the following formula for payback period: Payback Period = A + B C In the above formula, A is the last period with a negative cumulative cash flow; B is the absolute value of cumulative cash flow at the end of the period A; C is the total cash flow during the period after A Profitability Index is an investment appraisal technique calculated by dividing the present value of future cash flows of a project by the initial investment required for the project. Formula: Profitability Index = Present Value of Future Cash Flows Initial Investment Required = 1 + Net Present Value Initial Investment Required Explanation: Profitability index is actually a modification of the net present value method. While present value is an absolute measure (i.e. it gives as the total dollar figure for a project), the profitability index is a relative measure (i.e. it gives as the figure as a ratio). Decision Rule Accept a