What is the Internal Rate of Return (IRR)?
The Internal Rate of Return (IRR) is a financial metric used to estimate the profitability of potential investments. It is a discount rate that makes the net present value (NPV) of all cash flows from a particular project equal to zero.
Why Use IRR?
IRR is a key tool in capital budgeting. Businesses use it to compare different projects and decide which ones are worth pursuing. If the IRR of a project exceeds the company's required rate of return (often called the "hurdle rate"), the project is generally considered a good investment.
How IRR is Calculated
The IRR is solved using the following equation:
0 = NPV = Σ [ CFt / (1 + r)t ]
Where:
- CFt: Cash flow at time t
- r: The internal rate of return
- t: The time period
Limitations of IRR
While IRR is a powerful metric, it has limitations. It assumes that all cash flows generated by the project are reinvested at the same IRR rate, which may not always be realistic. Additionally, for projects with alternating positive and negative cash flows, there can sometimes be multiple IRRs or no IRR at all.
Total Cash Inflow vs. Profit
This calculator shows you the total cash inflow (the sum of all positive cash flows) and the total profit (inflow minus the initial investment) to give you a complete picture of the investment's raw performance alongside the time-weighted IRR percentage.