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Evaluate the profitability of potential investments. Input your initial capital outlay and project your future cash flows to instantly calculate the Internal Rate of Return (IRR).
Last updated: February 24, 2026
Just need to calculate basic commercial real estate returns? Skip to Cap Rate
Initial cash outflows should be negative.
If an investment doubles your money over 1 year, that's incredible. If an investment doubles your money over 30 years, it's terrible—inflation likely ate 100% of your real gains. IRR is powerful because it inherently penalizes cash flows that occur further out in the future.
How do you compare buying a laundromat that produces steady monthly cash flow, versus investing in a tech startup that pays nothing for 5 years before yielding a massive payout? IRR converts both wildly different scenarios into a single "annualized percentage rate", allowing executives to pick the better investment instantly.
Internal Rate of Return (IRR) is the discount rate that makes the net present value (NPV) of all project cash flows equal to zero. In plain terms, it is the annualized return implied by your full cash flow timeline. IRR matters because it helps compare opportunities with different sizes, timelines, and payout patterns using one common performance lens.
IRR solves this equation:
Where:
This calculator uses an iterative Newton-Raphson approach and returns an error if the sequence cannot converge to a stable single solution.
Example 1: Balanced Growth Project
Cash flows: -100,000; +25,000; +35,000; +45,000; +50,000
IRR is approximately 21.96% annualized.
Example 2: Slower Payback Profile
Cash flows: -100,000; +20,000; +20,000; +30,000; +45,000
IRR is approximately 6.40%, showing weaker annualized efficiency.
Example 3: Value-Destructive Case
Cash flows: -100,000; +10,000; +15,000; +20,000; +30,000
IRR is approximately -10.34%, indicating capital erosion over time.
Comparing projects side by side makes IRR interpretation much faster during screening.
| Scenario | Cash Flow Pattern | Approx. IRR | Interpretation |
|---|---|---|---|
| A | -100k, 25k, 35k, 45k, 50k | 21.96% | Strong candidate if risk-adjusted hurdle is lower |
| B | -100k, 20k, 20k, 30k, 45k | 6.40% | Borderline; depends on cost of capital |
| C | -100k, 10k, 15k, 20k, 30k | -10.34% | Destroys value under most capital assumptions |
Same IRR comparison in Markdown format for quick sharing with teams, analysts, or investment memos.
For practical use, pair IRR with NPV, payback, and risk-adjusted assumptions. A project with a slightly lower IRR can still be better if it creates more total value or carries lower execution risk.
Double-check your financial projections before presenting to investors. Bookmark and share this fast IRR tool.
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