IRR Calculator

Outflow at time 0 (negative).

Cost of borrowing.

Return on reinvested cash.

Year 1:
Year 2:
Year 3:

IRR Calculator: Evaluate Investment Profitability

Our IRR Calculator finds the internal rate of return for uneven cash flows, computes NPV, MIRR, and profitability metrics.

What is IRR?

The discount rate making NPV zero. Measures project return independent of external rates.

IRR vs NPV vs MIRR

MetricPurposeFormula
IRRBreak-even rateSolve NPV=0
NPVAbsolute valueΣ CF/(1+r)^t
MIRRRealistic reinvestment(FV positive / PV negative)^(1/n) - 1

When to Use IRR

  • Compare projects
  • Accept if IRR > cost of capital
  • With NPV for ranking

Example: $100K Investment, Cash Flows: $30K, $40K, $50K

  • IRR: 18.92%
  • NPV @8%: $15,486
  • MIRR: 15.27%
  • PI: 1.15

How IRR is Calculated

Newton-Raphson iteration on NPV equation until ≈0.

Why IRR Matters

  • Time value of money
  • Handles uneven flows
  • Link to NPV and ROI

Pro Tips

  • Use MIRR for realistic rates
  • Check multiple IRRs
  • Combine with payback
  • Accept if IRR > hurdle rate

Limitations

  • Assumes reinvestment at IRR
  • Multiple rates possible
  • No scale consideration

Conclusion

Assess investments with our IRR Calculator. Explore Finance tools.