The unique discount rate that equates the present value of a series of cash inflows (i.e.- lease payments- purchase option) to the present value of the cash outflows (equipment or investment cost). IRR is the most common method used to compute yields.
INTERNAL RATE OF RETURN (IRR)
Meaning of INTERNAL RATE OF RETURN (IRR) in English
Finance-Leasing English vocabulary. Английский словарь финансов и лизинга. 2012