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The payback method is a simple way to evaluate the number of years or months it takes to return the initial investment. The payback period is usually expressed in years. Start by calculating net cash flow for each year: net cash flow year one = cash inflow year one - cash outflow year one.
DEFINITION of 'Payback Period'. The length of time required to recover the cost of an investment. The payback period of a given investment or project is an important determinant of whether to undertake the position or project, as longer payback periods are typically not desirable for investment positions. Calculated as: