In real estate, IRR (internal rate of return) is the annualized percentage that captures how much your invested capital grows across a property’s entire lifecycle, from the day you close to the day you sell. What sets it apart from simpler yardsticks like cap rate or cash-on-cash return is that it weighs both the size and the timing of every dollar moving in and out of the deal. Most investors target an IRR somewhere between 10% and 20%, with the exact number depending on the property’s risk profile and the strategy behind the purchase.
What the Number Actually Measures
IRR is built on net present value (NPV), the idea that a future dollar is worth less than a dollar today because today’s dollar could be invested and earn a return in the meantime. IRR is the specific discount rate that makes the NPV of every projected cash flow — inflows and outflows combined — equal exactly zero.
Put another way: if you took every future payment you expect from a deal (monthly rent, annual distributions, the final sale proceeds) and discounted each one back to today at the IRR, the total would match what you paid upfront. That break-even rate is the investment’s own internal growth rate.
There is no algebraic shortcut for the calculation in most real-world cash flow patterns, so it is done by trial and error. In practice, investors run it through Excel’s IRR or XIRR functions or through underwriting software that solves it instantly.
The Inputs Behind an IRR Projection
An IRR is only as reliable as the four categories of data that feed it. A weak assumption in any one of them distorts the result.
- Initial capital outlay. The purchase price plus closing costs — title insurance, inspection fees, attorney fees, lender charges, and transfer taxes. These figures come off the closing disclosure, the standardized form that itemizes every cost tied to the transaction.1Consumer Financial Protection Bureau. Closing Disclosure Explainer
- Periodic cash flows. Net operating income for each year: rental revenue minus operating expenses like property taxes, insurance, management, repairs, and utilities.
- Capital improvements. Major one-time expenditures such as a roof replacement, HVAC upgrade, or unit renovation. These enter the model as negative cash flows in the year they happen, separate from the recurring maintenance already inside NOI.
- Terminal value. The expected net sale price at the end of the holding period, after subtracting selling costs. It is usually estimated by dividing the final year’s projected NOI by an assumed exit cap rate.
The recurring cash flows are pulled from a pro forma built on existing leases and local tax assessments. Capital improvement figures come out of a property condition assessment that estimates when large systems will need replacement and what that will cost.
Why Timing Changes the Answer
The formula discounts later payments more heavily than earlier ones, so when a dollar arrives matters as much as whether it arrives. Ten thousand dollars in year one carries more weight than ten thousand dollars in year five, even though the total dollars are identical.
This is why lease-up delays and extended vacancies drag IRR down even when the total return is unchanged — the discount applies a steeper penalty to cash that sits further out on the calendar. A front-loaded schedule, where meaningful distributions arrive early, produces a higher IRR than a back-loaded one with the same total payout. Projections need to model the specific month and year each payment occurs, not just annual totals.
The exit price magnifies this effect because it is often the largest single cash flow in the deal. A one-point shift in the exit cap rate can move the projected sale price by hundreds of thousands of dollars, and a longer hold pushes that payment further out where discounting takes a bigger bite. Shorter holds concentrate the exit closer to today and lift IRR, but they also make the number more sensitive to whatever you assumed the sale price would be. Conservative selling costs — commercial brokerage commissions run 2% to 8% of sale price depending on property type and size, plus transfer taxes that vary by jurisdiction — keep the model honest.
What Counts as a Good IRR
Target IRRs vary with risk. The industry groups deals into three broad tiers:
- Core. Stabilized, fully leased properties in strong markets with creditworthy tenants. Target IRRs typically run 8% to 12%.
- Value-add. Properties that need operational improvements, renovations, or lease-up to reach their full income potential. Targets generally fall between 15% and 20%.
- Opportunistic. Ground-up development, major repositioning, or distressed acquisitions. Targets above 20% compensate for the added uncertainty.
A “good” IRR only means something inside its tier. A 12% projection on a ground-up development is weak for the risk taken; the same 12% on a stabilized core asset is respectable.
Levered vs. Unlevered, Pre-Tax vs. After-Tax
Two IRRs can carry the same label and mean very different things. Before comparing deals, confirm which version of the number you are looking at.
An unlevered IRR is calculated as if you paid all cash for the property. A levered IRR is calculated on the equity you actually invested after taking on a mortgage. Debt amplifies returns in both directions. If the property’s return exceeds the borrowing cost, leverage boosts the equity IRR above the unlevered figure — positive leverage. If borrowing costs exceed the property’s return, leverage pulls the equity IRR below the all-cash return. A 5% value increase on an all-cash purchase produces a 5% return on equity; on the same property bought with 10% down, that same 5% swing translates to roughly 50% on the equity, and a 5% decline could wipe the down payment out entirely.
The pre-tax vs. after-tax distinction matters just as much. Most projections you will see run on pre-tax cash flows. Federal treatment of rental income, long-term capital gains at sale, depreciation recapture on the total depreciation claimed during the hold2eCFR. 26 CFR 1.453-12 – Allocation of Unrecaptured Section 1250 Gain, and the option to defer gains through a 1031 like-kind exchange3Office of the Law Revision Counsel. 26 U.S. Code 1031 – Exchange of Real Property Held for Productive Use or Investment all pull the actual return below the sticker figure. Comparing two deals only works if both IRRs use the same conventions on both dimensions.
Where IRR Misleads
IRR has well-documented flaws that matter when you use it as the only measure of a deal.
The Reinvestment Assumption
IRR implicitly assumes you reinvest every interim distribution at the same rate as the IRR itself for the rest of the holding period. A 25% projected IRR assumes you can immediately place each incoming check into another 25% investment, which is rarely realistic. This overstates returns on high-yield deals, and the higher the IRR, the more inflated the number becomes.
The Multiple IRR Problem
When cash flows alternate between positive and negative — a profitable year, then a major renovation expense, then more profit — the formula can produce more than one mathematically valid IRR. In those cases, neither answer is reliable, and IRR should not drive the decision.
MIRR and the Equity Multiple
Two companion metrics fill in what IRR leaves out. The modified internal rate of return (MIRR) lets you specify a separate, more realistic reinvestment rate for interim cash flows. You might assume distributions earn 5% sitting in a savings account instead of compounding at the deal’s projected 18%. The result is a more conservative annualized figure.
The equity multiple is total cash returned divided by total cash invested, expressed as a ratio. A 2.0x multiple means you doubled your money over the hold. It ignores timing entirely, which is exactly why it complements IRR: IRR tells you how fast the money came back, the equity multiple tells you how much came back in total. A deal that hits 15% IRR but only 1.3x returned capital quickly without generating much profit. Looking at both together prevents the speed of return from masking a thin total gain, or vice versa.