What is the IRR formula?

Asked by: Genesis VonRueden  |  Last update: July 18, 2026
Score: 4.4/5 (26 votes)

The IRR (Internal Rate of Return) formula finds the discount rate where the Net Present Value (NPV) of all project cash flows equals zero, expressed as: 0 = ∑ 𝑡 = 0 𝑛 𝐶 𝑡 ( 1 + 𝐼 𝑅 𝑅 ) 𝑡 0 = 𝑛 𝑡 = 0 𝐶 𝑡 ( 1 + 𝐼 𝑅 𝑅 ) 𝑡 , with 𝐶 0 𝐶 0 being the initial investment (negative) and 𝐶 𝑡 𝐶 𝑡 being cash flows in period 𝑡 𝑡 . It determines profitability by finding the rate that makes the present value of future inflows equal to the initial outlay, often solved iteratively or with software like Excel's IRR() or XIRR() functions.

How do you calculate the IRR?

The manual calculation of the IRR metric involves the following steps: Step 1 ➝ Divide the Future Value (FV) by the Present Value (PV) Step 2 ➝ Raise to the Inverse Power of the Number of Periods (i.e. 1 ÷ n) Step 3 ➝ From the Resulting Figure, Subtract by One to Compute the IRR.

What does a 20% IRR mean?

"IRR 20" means an investment's Internal Rate of Return is 20%, indicating it's expected to generate an annual growth rate (or return) of 20% over its life, assuming cash flows are reinvested at that rate. It's a key metric for comparing profitability, where a higher IRR generally signals a more attractive investment, often used to assess projects like startups or real estate deals against a benchmark.

Does IRR have a formula?

IRR formula

IRR relies on the same basic formula used to calculate a property's net present value (NPV), with one key difference. To calculate a property's NPV, an investor uses a predetermined discount rate to determine the current value of all future cash flows—positive and negative—from the property.

What is the IRR formula in Excel?

The IRR Function calculates the internal rate of return for a sequence of periodic cash flows. As a worksheet function, IRR can be entered as part of a formula in a cell of a worksheet, i.e., =IRR(values,[guess]). Businesses often use the IRR Function to compare and decide between capital projects.

Internal Rate of Return (IRR) Calculation #finance #investments

32 related questions found

How to calculate IRR in simple way?

The formula for XIRR is: XIRR = (NPV of Cash Flows / Initial Investment) × 100. The ideal XIRR varies based on the type of fund and individual financial goals. For example, a conservative debt fund might target an XIRR of 5–6%, while an aggressive small-cap fund may aim for 12–15%.

What does IRR actually tell you?

The Internal Rate of Return (IRR) tells you the compound annual growth rate an investment is expected to generate, acting as a profitability metric that accounts for the time value of money (dollars today are worth more than dollars tomorrow). It's the discount rate where the investment's net present value (NPV) equals zero, essentially showing the break-even point where inflows match outflows, helping investors compare projects and decide if they meet a minimum required return (hurdle rate). 

Can IRR be calculated manually?

The manual calculation of the IRR metric involves the following steps: Using the formula, one would set NPV equal to zero and solve for the discount rate, which is the IRR. Note that the initial investment is always negative because it represents an outflow.

What is an IRR example?

For example, a $10,000 investment with a 20% IRR would generate $2,000 in profit. However, IRR is a type of compound annual growth rate, meaning the annual yield from the investment is reinvested (or compounded).

Is IRR the same as interest rate?

The IRR is the interest rate (also known as the discount rate) that will bring a series of cash flows (positive and negative) to a net present value (NPV) of zero (or to the current value of cash invested). Using IRR to obtain net present value is known as the discounted cash flow method of financial analysis.

What is a good irr%?

What's a Good IRR in Venture? According to research by Industry Ventures on historical venture returns, GPs should target an IRR of at least 30% when investing at the seed stage. Industry Ventures suggests targeting an IRR of 20% for later stages, given that those investments are generally less risky.

What does 18% XIRR mean?

XIRR is that single rate of return, which when applied to every installment (and redemptions if any) would give the current value of the total investment. XIRR is your personal rate of return. It is your actual return on investments.

What is 12% IRR?

"12% IRR" means the Internal Rate of Return for an investment is 12%, indicating it's expected to yield an average annual return of 12%, making all future positive cash flows equal in present value to the initial investment, essentially representing the compound growth rate of the investment. It's a key metric for deciding if an investment is profitable, with a 12% IRR suggesting the project breaks even (Net Present Value is zero) at that rate, so it's attractive if your required return is below 12% and less so if it's higher.

What are the two types of IRR?

The formulas used to calculate IRR can be complex. Instead, real estate investors should create a proforma projection of cash flows for a defined holding period and use an IRR function in a spreadsheet to calculate it. There are two types of IRR, unlevered and levered. Unlevered means no debt, levered means with debt.

Is IRR the same as yield?

IRR provides a more comprehensive picture of an investment's potential than simple yield calculations since it takes into account cash flows, the length of the investment, and the time value of money.

How to calculate effective IRR?

These are the formula and calculations:

  1. Effective annual interest rate = (1 + (nominal rate ÷ number of compounding periods))(number of compounding periods) – 1.
  2. Investment A = (1 + (10% ÷ 12 ))12 – 1.
  3. Investment B = (1 + (10.1% ÷ 2))2 – 1.
  4. Investment A = 10.47%
  5. Investment B = 10.36%

How do you calculate IRR quickly?

So the rule of thumb is that, for “double your money” scenarios, you take 100%, divide by the # of years, and then estimate the IRR as about 75-80% of that value. For example, if you double your money in 3 years, 100% / 3 = 33%. 75% of 33% is about 25%, which is the approximate IRR in this case.

Can you calculate IRR in Excel?

Microsoft Excel uses an iterative technique for calculating IRR. Starting with guess, IRR cycles through the calculation until the result is accurate within 0.00001 percent. If IRR can't find a result that works after 20 tries, the #NUM! error value is returned.

What is the IRR of 30%?

What's an IRR of 30% Mean? An IRR of 30% means that the rate of return on an investment using projected discounted cash flows will equal the initial investment amount when the net present value (NPV) is zero. In this case, when the time value of money factors are applied to the cash flows, the resulting IRR is 30%.

Can I calculate IRR without Excel?

Yes, we can. The method for calculating IRRs without using Excel involves estimating an IRR to start with, calculating the resulting net present value manually, and then refining our next estimate - depending on the result of the first one.

What is the difference between IRR and ROI?

Is IRR the same as return on investment? No, IRR (Internal Rate of Return) is not the same as ROI (Return on Investment). While ROI measures the total return on an investment as a percentage of the initial cost, IRR calculates the annualised rate of return and considers the time value of money.

What does a 22% IRR mean?

"22 IRR" means an investment is expected to yield an Internal Rate of Return (IRR) of 22%, representing the annualized rate of profit where the present value of future cash inflows equals the initial investment, making it a measure of profitability often compared to a company's cost of capital or hurdle rate. For many investors, especially in private equity or real estate, a 22% IRR is considered a strong return, signaling a potentially good investment opportunity.
 

How to explain IRR to dummies?

What Is The Best Explanation Of IRR? The Internal Rate of Return (IRR) is a financial metric that calculates an investment's annual growth rate. It determines the percentage return where the net present value of cash flows equals zero. IRR helps investors assess project viability and compare investment opportunities.

What is a good IRR for 5 years?

Understanding IRR helps investors and business owners evaluate the profitability of investments over a five-year horizon. A good IRR typically exceeds your cost of capital, indicating value creation. High-growth investments often target IRRs between 20% and 30%, depending on risk.