About the IRR Calculator
Calculate the internal rate of return (IRR) and net present value (NPV) of a series of cash flows. This tool is free, works in your browser and needs no sign-up.
How to use the IRR Calculator
Enter the cash flows in order, starting with the first investment (usually negative). Add a discount rate to see the NPV.
Formula used
IRR is the rate r where Σ cash flow ÷ (1 + r)^t = 0. NPV = Σ cash flow ÷ (1 + discount rate)^t.
Example
With Discount rate for NPV (% per period) 8, the calculator shows: IRR per period = 19.711%; NPV at 8.00% = 3,667.99; Total net cash flow = 7,500.00.
Frequently asked questions
What is a good IRR?
A good IRR is higher than your required return or cost of capital. Compare it with other options and with the risk of the project.
Is the IRR Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the IRR Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.