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Modified IRR (MIRR) fixes IRR's reinvestment rate assumption by using explicit finance/reinvestment rates; often more realistic.

Trin-for-trin guide

  1. 1Input cash flows, finance rate (for negative CF), reinvestment rate (for positive CF)
  2. 2Calculate MIRR
  3. 3Compare to regular IRR

Løste eksempler

Input
Standard IRR 25%, but reinvestment at 10%
Resultat
MIRR ≈ 18% (more realistic)
Avoids unrealistic assumptions

Almindelige fejl at undgå

  • Using same rate for finance and reinvestment
  • Not reflecting realistic opportunity costs

Ofte stillede spørgsmål

Should I always use MIRR?

Yes if assumptions reasonable; more realistic than IRR for most projects.

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