Calculates an approximate internal rate of return (IRR) on an investment and series of cash flows. Calculations are based on your repeated approximations of the IRR. If you don't enter a guess, the default rate is 10%. After 20 guesses, this function returns a #NUM! error. You can then try another value.
Format: IRR (range {,guess})
Arguments:
ΓÇó range: A range of cells containing future cash flow amounts in the order they are paid out or received; the first amount is the initial investment and is negative.
ΓÇó guess: Your estimated internal rate of return (a numeric expression).
Example:
IRR (C1...C11) returns 7.87% (when using the Percent format and when C1...C11 contains the following values: -220000, 0, 25000, 40000, 40000, 40000, 40000, 40000, 40000, 40000, and 40000).
Shows that a projected expenditure of £220,000 increases revenues by £25,000 the second year and £40,000 for each of the next eight years.