Modified IRR Calculator
MIRR uses separate finance rate (negative CFs) and reinvestment rate (positive CFs).
How to use Modified IRR Calculator
- Enter your cash flows along with a finance rate and reinvestment rate.
- MIRR calculates automatically, correcting a known limitation of standard IRR that assumes unrealistic reinvestment at the IRR itself.
About this tool
Modified IRR Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Finance — Core Math. Browse more Finance — Core Math tools.