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The XIRR is the modification of IRR (Internal Rate of Return) for a schedule of cash flows that is not necessarily periodic. To calculate the internal rate of return for a series of periodic cash flows, use the IRR function.
The XIRR function syntax has the following arguments:
Payments Required. A series of cash flows that corresponds to a schedule of payments in dates. The first payment is negative number and corresponds to a cost or payment that occurs at the beginning of the investment. The series of values must contain at least one positive and one negative value.
Dates Required. A schedule of payment dates that corresponds to the cash flow payments. Dates may occur in any order. Dates should be entered by using the DATE widget.
Note
If any number in dates is not a valid date, XIRR returns the error value.
Guess is assumed to be 0.1 (10 percent).
The calculate uses an iterative technique for calculating XIRR. Using a changing rate (starting with guess), XIRR cycles through the calculation until the result is accurate within 0.000001 percent. The XIRR formula is: where:
Where
di = the ith payment date
d1 = the 0th payment date
Pi = the ith payment
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