Modified Internal Rate of Return (MIRR)

The IRR Reinvestment Assumption Problem

A standard IRR calculation implicitly assumes interim cash flow distributions are reinvested at the same IRR as the underlying investment. For a 18% IRR value-add deal, this assumes the LP can redeploy distributions at 18% — usually unrealistic. MIRR replaces that assumption with an explicit reinvestment rate (typically the investor's actual cost of capital or hurdle rate).

How MIRR Is Calculated

MIRR = (Future Value of Inflows / Present Value of Outflows)^(1/n) − 1. Future Value uses the reinvestment rate; Present Value uses the finance rate. The result is a single unambiguous return number that accurately reflects what the investor actually earned given their realistic reinvestment opportunities.

When MIRR Matters

Long-hold deals with significant interim distributions (where the reinvestment assumption matters most); deals with multiple sign changes in the cash flow pattern (capital calls during the hold) where standard IRR can produce multiple solutions; institutional LP underwriting where MIRR provides a more conservative apples-to-apples comparison across deals.

Run IRR + Equity Multiple

Project IRR and equity multiple across the full hold period — the two numbers that close most LP conversations.

What is MIRR?

Modified Internal Rate of Return — a return metric that addresses two flaws in standard IRR by separately specifying a finance rate for cash outflows and a reinvestment rate for cash inflows. The result is a single unambiguous return number more reflective of actual investor economics.

Why is MIRR more accurate than IRR?

Standard IRR assumes interim distributions can be reinvested at the IRR itself — often unrealistically high. MIRR replaces that assumption with an explicit reinvestment rate (typically the investor's actual cost of capital). On a deal with significant interim distributions, MIRR is meaningfully lower than IRR.

When should I use MIRR instead of IRR?

Long-hold deals with significant interim distributions; deals with multiple sign changes in cash flow (e.g., capital calls during hold); institutional comparisons across deals with very different cash flow timing patterns. For short-hold deals with minimal interim distributions, IRR and MIRR converge.

Do real estate LPs require MIRR in pitch decks?

Most LPs still focus on IRR and equity multiple in pitch materials. Sophisticated institutional LPs may calculate MIRR themselves to stress-test the IRR assumption. Including MIRR in a pitch deck signals sophisticated underwriting and is often well-received by family offices and institutional capital.

Article Summary

Modified Internal Rate of Return (MIRR) is a foundational commercial real estate concept that Florida investors, owners, and tenants encounter routinely. MIRR is a return metric that addresses two structural problems with traditional IRR — the assumption that interim cash flows are reinvested at the IRR itself, and the existence of multiple IRRs for non-conventional cash flow patterns — by separately specifying a finance rate for outflows and a reinvestment rate for inflows. Michael R. Linton at Linton Global Solutions applies Modified Internal Rate of Return (MIRR) to every Florida CRE transaction across multifamily, office, industrial, retail, hotels, NNN, distressed, and 1031 exchange execution — backed by 39 years of closed deal experience and REOMind.ai-powered analytics.

Key Takeaways

• ✓MIRR is a return metric that addresses two structural problems with traditional IRR — the assumption that interim cash flows are reinvested at the IRR itself, and the existence of multiple IRRs for non-conventional cash flow patterns — by separately specifying a finance rate for outflows and a reinvestment rate for inflows.
• ✓Modified Internal Rate of Return (MIRR) is relevant across virtually every Florida commercial real estate asset class.
• ✓Florida-specific considerations — insurance, no state income tax, judicial foreclosure, hurricane risk — affect application.
• ✓Michael R. Linton (FL Broker BK703722) has 39 years of Florida CRE transaction experience including this concept.
• ✓Linton Global Solutions combines local market expertise with REOMind.ai's 96% valuation accuracy.
• ✓For deal-specific application, contact Michael directly at (312) 612-1031.

About Michael R. Linton

Michael R. Linton — also known as Michael Linton or Mike Linton — is a Florida-licensed commercial real estate broker and advisor based in the Tampa–Orlando I-4 corridor. With 39+ years of experience closing commercial transactions, he leads Linton Global Solutions and HireMikeLinton.com, serving investors, owners, and tenants across all major commercial real estate asset classes — multifamily, office, industrial, retail, hotels & hospitality, land, mixed-use, special-purpose, self-storage, and life sciences.

Michael holds the NCREA (National Commercial Real Estate Advisor) and CREIPS (Certified Real Estate Investment Property Specialist) designations, is a REALTOR®, and is a Florida Real Estate Broker (License #BK703722). He is also the founder of Linton Global Technologies, which operates the REOMind.ai AI-powered REO disposition platform serving 500+ banks.

Ready to Talk About Your Modified Internal Rate of Return (MIRR) Deal?

Get a free consultation with Michael R. Linton — 39 years of Florida CRE experience. Zero pressure.

Works Cited

1. Internal Revenue Service. "Tax Information for Real Estate Investors." IRS, https://www.irs.gov/. Accessed Jun 13, 2026.
2. Florida Department of Business and Professional Regulation. "Florida Real Estate Commission." Florida DBPR, https://www.myfloridalicense.com/. Accessed Jun 13, 2026.
3. NAIOP Commercial Real Estate Development Association. "NAIOP Research." NAIOP, https://www.naiop.org/. Accessed Jun 13, 2026.
4. Urban Land Institute. "ULI Research Library." ULI, https://americas.uli.org/research/. Accessed Jun 13, 2026.
5. Mortgage Bankers Association. "Commercial & Multifamily Research." MBA, https://www.mba.org/. Accessed Jun 13, 2026.

Disclosure & Compliance

Disclosure: This article discusses proprietary technology developed by Linton Global Technologies. Michael R. Linton is the founder of Linton Global Technologies and a licensed real estate professional with Linton Global Solutions (FL Broker License #BK703722). This content is for informational purposes only and does not constitute investment, legal, or financial advice.

Compliance Statement: All CREDDS and REOMind.ai operations adhere to OCC requirements, fair housing standards, and environmental regulations. Properties discussed may be subject to Regulation 506(c)/(D) requirements where applicable, and investments may be restricted to accredited investors. Readers should conduct their own due diligence and consult with qualified professionals — including a licensed Florida real estate attorney, tax advisor, and certified public accountant — before making investment decisions. Past performance does not guarantee future results.