Internal Rate of Return on Property: Where the Number Misleads You

The internal rate of return is the most quoted and least understood property metric. These are the situations in which it flatters a deal or distorts a comparison.

The internal rate of return is the discount rate at which a project's cash flows have a present value of zero. It is genuinely useful because it accounts for the timing of money, and it is genuinely dangerous because it is sensitive to that timing in ways people do not expect. A deal with a high internal rate of return is not necessarily a deal that makes you more money, and these are the cases where that gap appears.

How to test a claim like this

Whenever you are given an internal rate of return, ask four questions. Over what period, and what happens to your capital afterwards? Is it levered or unlevered? What proportion of the return comes from the exit rather than from income? And what is the equity multiple alongside it? A figure presented without those four is a headline rather than an analysis, and the answers usually change how impressive it looks.

Myth 1: A higher internal rate of return means a better investment.

Reality: The metric measures the rate at which money compounds while it is invested, not how much money you make. A short project returning capital quickly can produce an excellent rate while generating a modest absolute profit, and then leaves you with cash to redeploy at an unknown return. A longer hold with a lower rate may build considerably more wealth over the same calendar period.

How to check it yourself: Always read the equity multiple and the absolute profit alongside the rate, and ask what you would realistically do with the capital after an early exit.

Myth 2: It is a fair way to compare deals of different lengths.

Reality: It is not, because it implicitly assumes you can reinvest returned capital at the same rate for the remainder of the comparison period. In practice reinvestment opportunities are uncertain and often worse. Comparing a two-year development against a seven-year income hold on this metric alone systematically favours the shorter deal.

How to check it yourself: Compare over a common horizon by stating what happens to returned capital, or compare on total value created over the period you actually intend to be invested.

Myth 3: It tells you about risk.

Reality: It is entirely silent on risk. A rate of 18 per cent earned from contracted income on a let building and one earned from a speculative development with a single exit event are reported identically. The metric describes the shape and timing of an expected set of cash flows, not the probability that those cash flows occur.

How to check it yourself: Pair every rate with a downside case and a break-even measure, so the number is read next to what happens when the assumptions fail.

Myth 4: Early cash flow has only a small effect on the result.

Reality: It has a disproportionate effect, because early amounts are discounted least. Deferring a refurbishment, delaying a distribution by a year or taking three months longer to let can move the rate noticeably while barely changing total profit. This also means the metric can be improved by timing decisions that add no value at all.

How to check it yourself: Test the rate against a case where everything happens three to six months later, and see how much of the apparent return was simply schedule optimism.

Myth 5: A levered rate shows a better investor.

Reality: Leverage raises the rate when the deal performs and destroys it when the deal does not, so a high levered figure describes the loan as much as the asset. Two investors buying the same building on the same day will report different rates purely because of how much they borrowed, which tells you nothing about which building was the better purchase.

How to check it yourself: Insist on seeing the unlevered rate beside the levered one; the gap between them is the contribution of debt, and it carries the risk.

Myth 6: The calculation always gives one sensible answer.

Reality: Where cash flows change sign more than once, for example a purchase, then income, then a large refurbishment outflow, then income again, the calculation can produce more than one mathematically valid rate or none at all. Spreadsheet functions will still return a figure, and it may be meaningless.

How to check it yourself: Plot the cash flow signs before relying on the result, and for any pattern with multiple outflows, report net present value at your required return instead.

Myth 7: It is the number investors care about most.

Reality: Experienced co-investors usually ask three things: how much money comes back in total, when, and what has to go wrong for it not to. The rate answers only part of the second question. Leading a presentation with it, rather than with the cash profile and the downside, signals that the case rests on timing assumptions.

How to check it yourself: Lead with the cash distribution profile and the stress case, and present the rate as a summary of them rather than as the headline.

What this changes in your decision

• Report the internal rate of return, the equity multiple and the absolute profit together, always.
• Show the unlevered figure beside the levered one so debt and asset are separable.
• State the proportion of the return that comes from the exit rather than from income.
• Rerun the calculation with every event delayed by six months and show both results.
• Where cash flows change sign more than once, present net present value at your required return instead, and have any tax effect on the cash flows confirmed by a licensed tax adviser, since treatment depends on your structure and the rules are periodically amended.

Domira builds the numbers on a Saudi property with you before you commit: rent and cost evidence, condition and capital expenditure, the appraisal and the sensitivities that decide whether the deal survives a bad year. The investment decision stays yours, and so does the advice of your licensed tax and legal advisers.