- Use it when you need a quick decision-ready view for IRR.
- Use it when you want to understand the formula and inputs before switching to the interactive tool.
- Use it when comparing investment, loan, or capital allocation scenarios.
- Cashflows (comma separated)
Example inputs
- Initial investment: -50,000
- Annual cash flows: 12,000, 15,000, 18,000, 20,000
Formula logic
IRR is the periodic discount rate r where NPV = sum(CFt / (1 + r)^t) equals zero.
How to read the result
Compare IRR with your required return. If IRR only barely clears the hurdle rate, review downside cash-flow assumptions.
- Using IRR for irregular dates instead of XIRR.
- Ignoring multiple-IRR problems when signs change more than once.
- Assuming all interim cash flows can be reinvested at the IRR.
Calculate Internal Rate of Return (IRR) for periodic cash flows — evaluate project profitability and compare investment opportunities. Free online IRR calculator. This page explains the main inputs and output interpretation before you switch into the full calculator.
Use the interactive tool when you already know your assumptions and want detailed tables, charts, or CSV export.
The formula uses the following inputs: Cashflows (comma separated). Enter them in the calculator above to get precise results.
Yes, The Capital Deck's IRR is completely free with no sign-up required.
Yes, the calculator works on all modern browsers on desktop and mobile devices.
Calculate Net Present Value (NPV) of future cash flows using your discount rate. Evaluate project viability and compare investment alternatives. Free NPV calculator.
Calculate Extended Internal Rate of Return (XIRR) for investments with irregular cash flows and dates. Free online XIRR calculator with step-by-step results.
Time to recover initial outlay from cashflows.
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