IRR Calculator
Calculate internal rate of return, NPV, MIRR, ROI, payback period, total cash inflows, and investment profit from a series of cash flows.
Investment Cash Flows
This IRR calculator gives estimates only. Actual investment results may vary based on timing, fees, taxes, reinvestment assumptions, and investment risk.
Enter values and click Calculate IRR.
Investment Breakdown
Initial Investment$0.00
Total Cash Inflows$0.00
Net Profit$0.00
IRR Summary
| Initial investment | $0.00 |
| Total cash inflows | $0.00 |
| Net profit | $0.00 |
| Internal rate of return | 0% |
| Net present value | $0.00 |
| MIRR | 0% |
| Payback period | — |
| Status | — |
IRR Calculator: Estimate Internal Rate of Return
Use this guide with the IRR calculator above to estimate internal rate of return, net present value, MIRR, ROI, payback period, total cash inflows, and investment profit.
What Is an IRR Calculator?
An IRR calculator is a financial tool that estimates the internal rate of return for a series of investment cash flows. IRR is the discount rate that makes the net present value of all cash flows equal to zero.
Investors and business owners often use IRR to compare projects, review real estate deals, analyze private investments, and understand whether expected cash flows may justify the initial investment.
How to Use This IRR Calculator
Enter your initial investment as a positive number, then enter future cash flows separated by commas or new lines. The calculator automatically treats the initial investment as the first negative cash flow.
Enter Initial Investment
Add the upfront amount invested in the project or investment.
Add Future Cash Flows
Enter expected cash inflows for each future period.
Set Discount and MIRR Rates
Use optional discount, finance, and reinvestment rates for extra analysis.
Review the Results
See IRR, NPV, MIRR, ROI, payback period, and profitability index.
Internal Rate of Return Formula
IRR is the rate that makes net present value equal to zero:
Because this equation usually cannot be solved with simple arithmetic, IRR calculators use an iterative method to estimate the rate.
What This IRR Calculator Shows
This calculator gives a practical investment return estimate based on your entered cash flows.
Internal Rate of Return
The estimated discount rate where net present value equals zero.
Net Present Value
The present value of cash inflows minus the initial investment.
MIRR
A modified IRR estimate using finance and reinvestment rates.
ROI
Net profit divided by the initial investment.
Payback Period
The estimated time required to recover the initial investment.
Profitability Index
Present value of future cash inflows divided by initial investment.
IRR Calculation Example
Suppose you invest $10,000 and expect future cash inflows of $2,500, $3,000, $3,500, $4,000, and $4,500.
The IRR calculator estimates the rate of return that makes the present value of those cash flows equal to the initial investment. You can also compare the result with NPV, MIRR, ROI, and payback period.
IRR vs. NPV
IRR shows an estimated percentage return, while NPV shows the dollar value created or lost after discounting cash flows. Both can be useful, but they answer different questions.
A project can have a high IRR but a small dollar profit. NPV can help show whether the investment creates enough value in actual dollars.
When IRR Is Useful
IRR is useful for comparing investment opportunities with different cash flow patterns. It is often used in real estate, private equity, business acquisitions, project finance, and capital budgeting.
However, IRR can be misleading when cash flows change signs multiple times, when project sizes differ, or when reinvestment assumptions are unrealistic.
IRR Planning Tips
Related Calculators and Trusted Investment Resources
Continue planning with related financial calculators and trusted educational resources.
NPV Calculator
Estimate net present value from investment cash flows.
Open Tool → Internal ToolROI Calculator
Calculate return on investment and compare profitability.
Open Tool → Internal ToolInvestment Calculator
Estimate investment growth, returns, and future value.
Open Tool → Internal ToolPayback Period Calculator
Estimate how long it may take to recover an investment.
Open Tool →Learn More From Official Financial Sources
These external resources are provided for educational purposes and open in a new tab.
Rate of Return
Learn what rate of return means for investments.
Visit Investor.gov → SECInvestor Resources
Explore official investor education from the SEC.
Visit SEC → FINRAInvestor Education
Review investment education and investor protection resources.
Visit FINRA → IRSCapital Gains and Losses
Read IRS information about capital gains and losses.
Visit IRS →Frequently Asked Questions
What is an IRR calculator?
An IRR calculator estimates the internal rate of return for a series of investment cash flows.
What does IRR mean?
IRR means internal rate of return. It is the discount rate that makes net present value equal to zero.
Is a higher IRR always better?
Not always. A higher IRR can look attractive, but investors should also review NPV, project size, risk, timing, and assumptions.
What is the difference between IRR and MIRR?
MIRR adjusts IRR by using separate finance and reinvestment rates, which can make it more realistic in some investment comparisons.
Can this calculator predict exact investment returns?
No. It provides estimates only. Actual results may vary due to timing, taxes, fees, financing, cash flow changes, and investment risk.
Important Disclaimer
This IRR calculator is for educational and informational purposes only. It does not provide financial, investment, tax, or legal advice. Investment returns can change, and projected cash flows may not occur as expected.