IRR
Calculates the internal rate of return on an investment based on a series of periodic cash flows.
Sample Usage
IRR(A2:A25)
IRR({4000,200,250,300,350},0.1)
Syntax
IRR(cashflow_amounts, [rate_guess])

cashflow_amounts
 An array or range containing the income or payments associated with the investment.cashflow_amounts
must contain at least one negative and one positive cash flow to calculate rate of return.

rate_guess
 [ OPTIONAL  0.1 by default ]  An estimate for what the internal rate of return will be.
Notes

Each cell in
cashflow_amounts
should be positive if it represents income from the perspective of the owner of the investment (e.g. coupons) or negative if it represents payments (e.g. loan repayment). 
NPV
will return zero ifdiscount
is set to the result ofIRR
using the same cash flow amounts. 
If the cash flows of an investment are irregularly spaced, use
XIRR
instead.
See Also
XNPV
: Calculates the net present value of an investment based on a specified series of potentially irregularly spaced cash flows and a discount rate.
XIRR
: Calculates the internal rate of return of an investment based on a specified series of potentially irregularly spaced cash flows.
PV
: Calculates the present value of an annuity investment based on constantamount periodic payments and a constant interest rate.
NPV
: Calculates the net present value of an investment based on a series of periodic cash flows and a discount rate.
MIRR
: Calculates the modified internal rate of return on an investment based on a series of periodic cash flows and the difference between the interest rate paid on financing versus the return received on reinvested income.
Examples
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