Why IRR Alone Can Distort Your View of an Investment

Internal rate of return has become the default scoreboard for private investments. Managers lead with it, marketing materials headline it, and investors reflexively compare one deal to another by lining up their IRRs. The metric is genuinely useful, but it carries limitations serious enough that leaning on it alone can lead investors to poor decisions. At Heritage Hill, we think the most important thing an investor can understand about IRR is how it differs from a plain annualized return, and why the two are not interchangeable.

Annualized Return Versus IRR

Start with annualized return, because it is the more intuitive of the two. An annualized return is simply how much an investment earns each year it stays invested, with compounding doing its work over time. If a sum of money compounds at a steady annual rate for enough years, you can say with precision how much wealth it produces. The math is clean, and the result is expressed in real dollars you can point to.

IRR attempts to express an equivalent annualized rate, but it does something subtly different: it accounts for the timing of every cash flow, including money that is invested or returned over very short windows. Crucially, IRR also assumes that every distribution you receive is immediately reinvested at the same rate. That reinvestment assumption is baked into the calculation even though, in practice, it rarely holds true. You are unlikely to redeploy each distribution instantly into an equally attractive opportunity.

The most important limitation is this: IRR does not tell you how much money you actually made. An annualized return translates directly into ending wealth. An IRR does not. You can know a deal produced a given IRR over a given period and still have no idea, without more information, what your total dollar gain was.

A Simple Example

Picture a hypothetical investment of a fixed amount that returns cash over three years and ends with a total gain of 20 percent of the original capital. Run those cash flows through an IRR calculation and the result comes out meaningfully higher than 20 percent, because the early distributions are credited as if they compounded. The headline IRR looks impressive. The actual gain is still just 20 percent.

To put that in perspective, achieving the same 20 percent total gain as a steady annualized return over three years would require only a modest single-digit yearly rate. Meanwhile, if that same capital had truly compounded at the higher IRR figure every year, the total gain would have been far larger than 20 percent. The gap between the two numbers is the gap between perception and reality. So before you are dazzled by a fund advertising a lofty annual IRR, ask what the total gain on invested equity actually was.

Two Deals, Same IRR, Very Different Outcomes

The most powerful illustration compares two investments that report an identical IRR but hand investors dramatically different results. Imagine both commit the same amount of capital for the same three years and both compute to, say, a 15 percent IRR.

In the first, cash comes back steadily, with large distributions in the early years and a final payment at the end. In the second, nothing comes back until a single large payment in the final year. Because IRR rewards early cash flows, the first deal can match the second's IRR while producing a much smaller total gain. The second deal, where all the money is tied up and then returned at the end, produces a larger total gain, and in fact its IRR and its true annualized return converge, because the capital genuinely compounded the whole time.

Both investors locked up their money for three years. One walked away with far more. Comparing them on IRR alone would have told you nothing about that difference, which is exactly why IRR is a dangerous sole criterion.

The Case in Favor of IRR

None of this means IRR is worthless. Getting capital back sooner genuinely reduces risk, because cash flows expected further into the future are inherently less certain than those arriving soon. An investor who receives early distributions has, in principle, the chance to redeploy that capital elsewhere. The catch is that you cannot know what opportunities will exist when the distributions arrive, and they are unlikely to offer the same return. Reinvesting well also takes time, effort, and discipline. So the reinvestment advantage that IRR assumes is real but partial, and it should be weighed rather than taken for granted.

What to Look at Alongside IRR

The practical fix is to never evaluate IRR in isolation. Pair it with total return, also called the equity multiple, which tells you in plain terms how many dollars came back for every dollar invested. A manager can post an eye-catching IRR without creating much real wealth, and only the multiple exposes that.

Ultimately, wealth is built by compounding money over long periods, and a chase for high short-duration IRRs can undermine that goal. In many cases an investor is better served by a durable investment earning a solid annualized return for years than by a flashy short-term IRR that impresses on paper but leaves little behind. The metric that produces applause is not always the one that produces wealth.

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Partner with Heritage Hill

At Heritage Hill, we underwrite deals on total return and the equity multiple alongside IRR, so that our investments are judged by the wealth they actually build rather than by a headline rate that can flatter the timing of cash flows.

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This material is for informational and educational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any security. Private real estate investments involve risk, including the possible loss of principal. Past performance is not indicative of future results.