MIRR Function in Excel: IRR With Realistic Reinvestment

⏱ 1 min readUpdated 28 September 2026

FinancialLevel: ExpertAvailable in: Excel 2007+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. Related functions

MIRR fixes IRR’s optimistic assumption that cash is reinvested at the IRR itself, using separate finance and reinvestment rates.

Syntax

=MIRR(values, finance_rate, reinvest_rate)
Argument What it means
finance_rate Cost of borrowing.
reinvest_rate What you actually earn on cash received.

Examples

Example 1

=MIRR(B2:B7, 10%, 7%)

Project return assuming 10% funding cost and 7% reinvestment.

IRR · XIRR

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