IRR Calculator
Internal rate of return
Instructions
1
Enter Cash Flows
Start with initial investment (negative) followed by returns.
2
Calculate
Get the discount rate that sets NPV to zero.
Formula
0 = Σ CF_t / (1+IRR)^t
IRR is solved numerically (no closed form in general).
Common Questions
Multiple IRRs?
If sign changes more than once, multiple IRRs may exist. Consider NPV or MIRR.
Units
Assumes equal time steps between cash flows (e.g., yearly).