Calculate the Internal Rate of Return (IRR) for a series of cash flows. Supports up to 20 periods with NPV analysis, payback period, and profitability index.
The IRR (Internal Rate of Return) Calculator helps investors and financial analysts determine the discount rate at which the net present value of a series of cash flows equals zero. IRR is one of the most widely used metrics in capital budgeting, private equity, and real estate analysis because it captures the time value of money while producing a single percentage figure for easy comparison.
Enter your initial investment (negative cash flow) and subsequent period cash flows to instantly compute the IRR using Newton's method. The calculator also displays the NPV at various discount rates, cumulative cash flows, payback period, and profitability index, so you can see both the percentage return and the dollar value created.
Whether you're evaluating a real estate deal, comparing project proposals, or analyzing a startup investment, this calculator goes beyond simple IRR to show you the full picture. It is especially useful when you need to compare projects of different timing profiles or test how sensitive a deal is to the discount rate you choose.
Use this calculator to quickly evaluate investments and compare projects with IRR, NPV, payback period, and profitability index. The sensitivity analysis helps stress-test your assumptions without a spreadsheet, which is useful when comparing projects, testing hurdle rates, or sanity-checking a cash flow model before you commit time or capital. It also gives you a compact way to compare timing-heavy cash flow streams on the same page.
IRR is the rate r that satisfies: NPV = Σ [CFₜ / (1 + r)^t] = 0, where CFₜ is the cash flow at period t. NPV = Σ [CFₜ / (1 + d)^t] for a given discount rate d. Payback Period = year where cumulative CF turns positive. Profitability Index = PV of future cash flows / Initial Investment.
Result: IRR = 13.18%
With an initial investment of $100,000 and cash flows of $30K, $35K, $40K, and $45K over 4 years, the IRR is 13.18%. The total return is $150,000 on a $100,000 investment with a payback period of approximately 2.88 years.
The Internal Rate of Return is a cornerstone metric in financial analysis, widely used across venture capital, private equity, corporate finance, and real estate. Unlike simple return calculations, IRR accounts for the timing of cash flows — recognizing that $1 received today is worth more than $1 received in five years.
The IRR is computed by solving the equation NPV = 0 for the discount rate. Since this equation generally cannot be solved algebraically for more than a few periods, numerical methods like Newton-Raphson iteration are used. This calculator performs up to 1,000 iterations to find the IRR to four decimal places of accuracy.
While IRR is powerful, it has limitations. For mutually exclusive projects of different sizes, NPV is a better choice because IRR doesn't account for scale. A small project returning 50% IRR creates less value than a large project returning 20% if the dollar amounts differ significantly.
The Profitability Index (PI) bridges this gap — it measures value created per dollar invested. A PI above 1.0 means value creation. The calculator displays all three metrics (IRR, NPV, PI) together so you can make well-rounded decisions.
In real estate, investors use IRR to compare rental properties, factoring in purchase price, renovation costs, rental income, and eventual sale proceeds. Private equity firms compute IRR to report fund performance to limited partners. Corporate finance teams use IRR to decide between capital projects, ensuring resources go to the highest-return opportunities.
IRR (Internal Rate of Return) is the discount rate that makes the net present value (NPV) of all cash flows equal to zero. It represents the annualized effective compounded return rate an investment is expected to generate, which is why it is commonly used to compare projects with different cash flow timing.
ROI is a simple ratio of total gain to investment, ignoring time. IRR accounts for the timing of each cash flow, making it more accurate for multi-period investments. A project with front-loaded returns has a higher IRR than one with the same total but back-loaded returns.
IRR can be misleading for non-conventional cash flows (multiple sign changes), mutually exclusive projects of different sizes, or when reinvestment at the IRR rate is unrealistic. Use Modified IRR (MIRR) or NPV in these cases.
It depends on the context. Venture capital targets 25-35%+, private equity 15-25%, real estate 10-20%, and corporate projects typically need to exceed the company's WACC (often 8-12%).
Yes. A negative IRR means the investment loses money — the present value of outflows exceeds inflows regardless of the discount rate. This indicates the project destroys value at any cost of capital.
The NPV sensitivity table shows how the Net Present Value changes across different discount rates (e.g., 5%, 10%, 15%, 20%). This helps you understand how sensitive your investment's value is to changes in the cost of capital or required return rate.