Two townhouse projects each return a 20 per cent profit on cost. One delivers and settles in eighteen months. The other takes three years to reach the same finish line. On a margin measure they look identical, and a developer comparing them on profit alone would call it a tie. On an Internal Rate of Return (IRR) basis they are not close: the faster project earns roughly double the annualised return of the slower one, because the money comes back sooner and can go to work again. That gap is the whole point of the Internal Rate of Return (IRR). It is the one feasibility metric that takes the timing of every dollar seriously, and for a developer deciding which site to chase, which structure to use, and what to tell an equity partner, the timing is often where the deal is won or lost.
This guide is written for the developer trying to work out what the Internal Rate of Return (IRR) actually tells them about a deal, not the passive investor reading a fund flyer. It covers what the metric measures, why the timing of cash beats raw profit, how the figure is annualised, the difference between a project Internal Rate of Return (IRR) and an equity Internal Rate of Return (IRR), why development cashflows need the XIRR calculation rather than plain IRR, what counts as a workable hurdle rate in the Australian market, how the Internal Rate of Return (IRR) drives an equity waterfall, where the metric quietly misleads, and how state-by-state timing differences move the result. Every benchmark is hedged, because required returns shift with the cycle, the cost of capital, and the risk of the specific project, and a rate that reads as strong in one market may read as thin in the next.
What the Internal Rate of Return (IRR) actually measures
The Internal Rate of Return (IRR) is the annualised discount rate at which the Net Present Value (NPV) of every cash flow in and out of a project equals zero. Put in plainer terms, it is the single compounding rate of return that the project’s own cashflow implies, once the timing of each payment is taken into account. Corporate Finance Institute describes the Internal Rate of Return (IRR) as the discount rate that makes the Net Present Value (NPV) of all cash flows equal to zero in a discounted cash flow analysis, and that definition is worth holding onto, because it explains both the strength and the quirks of the metric.
The mechanics matter less than the intuition. A development feasibility is, at heart, a dated list of cash going out (land, acquisition costs, design fees, construction drawdowns, holding costs, selling costs) and cash coming in (deposits, pre-sale settlements, final sales, or rental income on a hold). The Internal Rate of Return (IRR) is the rate that ties those two streams together once each amount is discounted back for how long the developer’s money was actually exposed. Microsoft’s own guidance on building the calculation in a spreadsheet frames it the same way, treating the Internal Rate of Return (IRR) as the rate that values a series of dated cash flows against time.
Three features of the metric flow directly from that definition, and each one matters to a developer:
- It is time-weighted. A dollar returned early counts for more than a dollar returned late, because the early dollar can be redeployed. Profit margins ignore this entirely.
- It is annualised. The result is expressed as a rate per year, which lets a developer compare a quick infill duplex against a three-year apartment block on a common footing.
- It is self-contained. The rate comes only from the project’s own cashflow. It does not, by itself, tell you how many dollars you made or whether the project was big enough to matter.
The Internal Rate of Return (IRR) is generally understood as the metric that answers “how hard did my money work, per year, given when it went in and came out.” That is a different question from “how much profit did the project make,” and confusing the two is where a lot of feasibility thinking goes wrong.
Why the timing of cash beats raw profit
The single most useful thing the Internal Rate of Return (IRR) does for a developer is punish slow projects and reward fast ones, even when the profit is the same. This is the lesson the opening example is built on, so it is worth working through with numbers.
Take two projects, each requiring $2,000,000 of the developer’s own equity and each returning a $400,000 profit, a clean 20 per cent on the cash invested. The only difference is duration.
| Project A (fast) | Project B (slow) | |
|---|---|---|
| Equity invested | $2,000,000 | $2,000,000 |
| Profit | $400,000 | $400,000 |
| Profit on equity | 20% | 20% |
| Time to return | 18 months | 36 months |
| Approximate Internal Rate of Return (IRR) | 12.9% | 6.3% |
Same equity, same profit, same margin. The faster project produces an Internal Rate of Return (IRR) of roughly 12.9 per cent, the slower one roughly 6.3 per cent. The annualised return on the quick project is about double, because the developer gets their $2,400,000 back a full eighteen months earlier and can put it into the next deal. A margin measure cannot see that difference. The Internal Rate of Return (IRR) is built to see almost nothing else.
This is the developer-relevant heart of the metric, and it has a sharp practical implication. Anything that shortens the timeline (faster planning approval, a shorter build programme, quicker sell-down, earlier pre-sale settlements) lifts the Internal Rate of Return (IRR) without adding a dollar of profit. Anything that drags the timeline out (a planning appeal, a wet-weather delay, a slow sales campaign) erodes the Internal Rate of Return (IRR) even if the eventual profit is untouched. For a developer, time genuinely is money, and the Internal Rate of Return (IRR) is the metric that puts a number on exactly how much.
It also explains a finding that surprises people new to the metric. Research into development returns has noted that longer-term projects often show lower Internal Rate of Return (IRR) figures than shorter ones, and that the relationship can even run counter to the raw profit, because of how the timing of expenditures and the residual land value calculation interact over a longer horizon. A bigger, more profitable project can post a weaker Internal Rate of Return (IRR) than a small, fast one. Neither metric is lying. They are measuring different things.
How the Internal Rate of Return (IRR) is annualised
A common error is to take a project’s total return and divide it by the number of years to get an annual figure. The Internal Rate of Return (IRR) does not work that way, because it compounds.
Suppose a project turns $1,000,000 of equity into $1,400,000 over three years, a 40 per cent total return. The naive annual figure is 40 divided by 3, or about 13.3 per cent a year. The actual compounding rate is lower. The Internal Rate of Return (IRR) here is the rate that grows $1,000,000 into $1,400,000 over three years when interest is earned on interest, which works out to roughly 11.9 per cent a year (1.40 to the power of one-third, minus one). The difference between the naive 13.3 per cent and the compounded 11.9 per cent is the effect of annualising properly, and it widens as the timeline lengthens.
The reason this matters is that the Internal Rate of Return (IRR) lets a developer compare returns across completely different holding periods on a like-for-like basis. A duplex that returns 18 per cent over a year and an apartment project that returns 60 per cent over four years can be ranked directly, because both have been reduced to an annual compounding rate. Without that annualising step, the two numbers are not comparable at all. A 60 per cent total return over four years is, in Internal Rate of Return (IRR) terms, only about 12.5 per cent a year, materially below the duplex.
For a developer, the takeaway is to treat the Internal Rate of Return (IRR) as a per-year rate that already accounts for compounding, and to be suspicious of any pro forma that arrives at an annual return by simple division. The honest annualised figure is almost always lower than the back-of-envelope one, and lenders and equity partners will be working with the honest version.
Project Internal Rate of Return (IRR) versus equity Internal Rate of Return (IRR)
One project produces at least two Internal Rate of Return (IRR) figures, and a developer who quotes one without saying which is inviting confusion. The split mirrors the cost-versus-equity question that runs through all development finance.
The project Internal Rate of Return (IRR), also called the unlevered Internal Rate of Return (IRR), is calculated on the whole project as if it were funded entirely with the developer’s own money, with no debt at all. The cash out is the full Total Development Cost (TDC); the cash in is the gross sales or rent. It measures the quality of the development itself, stripped of how it was financed. Industry guidance describes the unlevered figure as the return on the total project investment, reflecting the property’s core performance without the influence of debt.
The equity Internal Rate of Return (IRR), also called the levered Internal Rate of Return (IRR), is calculated only on the developer’s own equity slice, after debt is drawn and repaid. The cash out is the equity actually contributed (Total Development Cost (TDC) less the loan); the cash in is what is left for equity after the lender is paid out. It measures what the developer (and any equity partner) actually earns on the money they put at risk.
When debt is accretive, which it usually is on a development priced to work, the equity Internal Rate of Return (IRR) sits above the project Internal Rate of Return (IRR), because borrowing at a cost below the project’s own return amplifies the return on the thinner equity base. That amplification is not free. Leverage lifts the equity return in the good case and deepens the loss in the bad case, which is why a strong equity Internal Rate of Return (IRR) should always be read alongside the gearing that produced it. The way a facility is sized, staged and priced sits at the centre of this, and the property development finance guide covers the debt side in depth.
A quick orientation on which figure to use:
- Lead with the equity Internal Rate of Return (IRR) when talking to an equity partner or a joint venture (JV) co-investor, because it is the return on their actual contribution.
- Carry the project Internal Rate of Return (IRR) to test whether the development stacks up on its own merits before financing flatters it. A deal that only works because of aggressive gearing is a fragile deal.
- Always state which one you are quoting. “An 18 per cent Internal Rate of Return (IRR)” means very different things at the project level and the equity level.
Why developers need XIRR, not plain IRR
Here is a technical point that trips up developers who build their own feasibility in a spreadsheet, and it has real consequences for the number that comes out.
The standard IRR function assumes cash flows arrive at regular, evenly spaced intervals, typically one per year or one per period. Development cashflows are nothing like that. Land settles on one date, a planning approval lands months later, construction draws down in irregular lumps, pre-sales settle on completion, and final stock sells over a sales campaign that might run for a year. The intervals are uneven and the amounts are lumpy. Feeding that into a plain IRR calculation, which silently assumes even spacing, produces a misleading rate.
The fix is the XIRR calculation, which takes each cash flow together with its actual date. Microsoft’s documentation is explicit that XIRR returns the internal rate of return for a schedule of cash flows that is not necessarily periodic, using the real calendar dates and a 365-day year, where the plain IRR function is only appropriate for genuinely periodic flows. For any development with dated, irregular cashflows, which is to say almost every development, the XIRR approach is the correct one, and practitioner guidance treats it as the default for real estate cashflows precisely because the timing varies.
The practical discipline is simple. Build the feasibility cashflow on real dates (the land settlement date, each drawdown date, each expected settlement date), and calculate the return against those dates rather than against tidy annual buckets. A developer who models in annual periods will usually overstate or understate the Internal Rate of Return (IRR) depending on whether the real cash lands earlier or later within each year. The same care that goes into building the feasibility spreadsheet should go into dating the cashflow, because the Internal Rate of Return (IRR) is only as accurate as the timing fed into it.
What counts as a workable Internal Rate of Return (IRR) in Australia
There is no single “good” Internal Rate of Return (IRR), and any source that quotes one without context should be treated with caution. What a developer needs is a hurdle rate, the minimum Internal Rate of Return (IRR) below which they will not proceed, set against the risk of the specific project and their own cost of capital.
The Australian evidence on how developers actually set these hurdles is unusually good, because it has been surveyed directly. A study out of Bond University in Queensland surveyed 225 Australian and New Zealand developers on how they select hurdle rates and found that most use a specific go/no-go hurdle mechanism, with the majority relying on margin on development cost or the Internal Rate of Return (IRR), and that the two most common ways of determining a site’s value before acquisition are the residual land value method and the discounted cash flow method. The same research notes that the Internal Rate of Return (IRR) becomes a hurdle once a target Internal Rate of Return (IRR) is set, reflecting the project’s forecast minimum acceptable return, and that Australian developers, like their United Kingdom counterparts, tend to favour margin on cost first with the Internal Rate of Return (IRR) following close behind.
How is that hurdle built? The common approach, confirmed across several surveys, is a risk-free rate plus a risk premium rather than a textbook cost-of-capital calculation. In Australian practice that risk-free anchor tends to track the prevailing Reserve Bank of Australia (RBA) cash rate, which sat at around 4.35 per cent as at June 2026, with a premium stacked on top to reflect the development’s specific risk: planning risk, construction risk, sales risk, and the developer’s own track record. The riskier the project, the higher the premium, and the higher the Internal Rate of Return (IRR) a developer should demand before committing.
A few framing points worth holding in mind, all of them hedged because they move with the market:
- A development is a high-risk undertaking, so the target Internal Rate of Return (IRR) should sit well above what a passive, lower-risk investment would return. Commentary aimed at developers commonly suggests targeting an Internal Rate of Return (IRR) comfortably above 15 per cent for ground-up work, though the figure varies widely by project and cycle.
- The hurdle is a function of risk, not a fixed number. A low-risk, largely pre-sold project might justify a lower target than a speculative, unapproved site with no pre-sales.
- The Internal Rate of Return (IRR) hurdle should clear the developer’s cost of capital with room to spare. An Internal Rate of Return (IRR) that only just beats the cost of borrowing leaves nothing for the risk being taken.
The honest position is that a “workable” Internal Rate of Return (IRR) is the one that compensates the developer for the specific risk of the specific deal in the current market, not a number copied from a blog. The value of the metric is that it forces that comparison to be explicit.
The Internal Rate of Return (IRR) inside the equity waterfall
For any developer raising third-party equity, the Internal Rate of Return (IRR) is not just a feasibility output. It is usually the trigger that decides how profit is split, through a structure known as an equity waterfall.
In a typical arrangement, equity partners (the limited partners, or money partners) put in most of the cash and receive a preferred return first, a defined Internal Rate of Return (IRR) paid to them before the developer (the sponsor, or general partner) shares in the upside. JPMorgan describes the equity waterfall as a tiered structure where distributable cash is paid out in a set order, with each tier typically defined by an Internal Rate of Return (IRR) hurdle. Only once the partners have received their preferred Internal Rate of Return (IRR) does the next tier open up.
The structure usually runs in layers:
- Return of capital. Equity partners get their original contribution back.
- Preferred return. Partners receive a defined Internal Rate of Return (IRR), often in the high single digits, before the sponsor participates. Industry data suggests a preferred return around 8 per cent is the most common single figure, though it varies by deal and market.
- Catch-up and promote. Above the preferred hurdle, the sponsor (developer) earns a disproportionate share of the remaining profit, the promote or carried interest, as a reward for delivering returns beyond the threshold. Further Internal Rate of Return (IRR) hurdles can step the sponsor’s share up again.
The implication for a developer is that the Internal Rate of Return (IRR) is doing double duty. It measures the deal, and it sets the price of the capital. A higher preferred Internal Rate of Return (IRR) demanded by partners pushes more of the project’s return to them and shrinks the developer’s promote. Because the hurdles are defined as time-weighted Internal Rate of Return (IRR) figures rather than flat profit shares, the timing point from earlier comes straight back: a delay that drags the equity Internal Rate of Return (IRR) down can push the project below a promote hurdle, costing the developer a slice of profit even if the dollar profit is unchanged. The mechanics of preferred equity, hurdles and promotes are covered in the equity partners and preferred equity guide, and they reward careful structuring.
Where the Internal Rate of Return (IRR) misleads
The Internal Rate of Return (IRR) is powerful, but it is also the metric most easily gamed and most often misread. A developer who leans on it without understanding its blind spots can talk themselves into a weak deal. The main traps:
It flatters short holds and can be engineered
Because the Internal Rate of Return (IRR) rewards speed, a project that returns cash very quickly can post a spectacular rate on a modest dollar profit. A short deal that turns capital around in a few months can show an Internal Rate of Return (IRR) of 40, 70, even 100 per cent and more, while building very little actual wealth. Worse, the figure can be engineered: pulling distributions forward, or structuring an early return of capital, lifts the headline Internal Rate of Return (IRR) without improving the real outcome. A very high Internal Rate of Return (IRR) on a small or short project is a prompt to ask how many dollars actually came out, not a reason to celebrate.
It tells you nothing about absolute dollars
This is the big one for developers choosing between projects. The Internal Rate of Return (IRR) is a rate, not an amount. A small project with a 35 per cent Internal Rate of Return (IRR) might generate far less profit than a larger project at 18 per cent. The metric simply cannot see the difference, which is why it should always be paired with the equity multiple (total cash returned divided by cash invested), a measure that captures the absolute dollars the Internal Rate of Return (IRR) ignores. Practitioner guidance is consistent that the Internal Rate of Return (IRR) and the equity multiple should be read together, because each answers a question the other cannot. A developer with limited equity and one slot to fill usually cares about the dollars, not just the rate.
The reinvestment debate, and the case for the Modified Internal Rate of Return (MIRR)
A long-standing criticism is that the Internal Rate of Return (IRR) implicitly assumes interim cash is reinvested at the Internal Rate of Return (IRR) itself, which on a high-return project is unrealistic. The position is genuinely contested. Some analysts argue the reinvestment assumption is a misconception, because the Internal Rate of Return (IRR) is a discounting calculation that makes no claim about what happens to cash received along the way. Either way, where it matters, the Modified Internal Rate of Return (MIRR) offers a more conservative reading by letting the developer set a separate, realistic reinvestment rate and finance rate, which also removes the multiple-rate problem described next. The Modified Internal Rate of Return (MIRR) tends to sit below the Internal Rate of Return (IRR) and is the more cautious figure to carry into a marginal decision.
Multiple rates with non-conventional cashflows
When a project’s cashflow changes sign more than once (for example a development that needs a large late equity injection partway through, after earlier distributions), the Internal Rate of Return (IRR) calculation can produce more than one mathematically valid answer, which makes the single figure meaningless. The possibility of multiple Internal Rate of Return (IRR) values is a recognised limitation for non-conventional cashflows, and it is one more reason to use the Modified Internal Rate of Return (MIRR), which resolves to a single value, when a project has lumpy late capital calls.
The sensible developer’s habit is to treat the Internal Rate of Return (IRR) as one reading among several. Pair it with the equity multiple for absolute dollars, with the Net Present Value (NPV) for value created against a chosen discount rate, and with a proper downside case. Running that downside systematically, rather than eyeballing a single base case, is the subject of the sensitivity analysis guide, and it is where the Internal Rate of Return (IRR) earns its keep, by showing how fast the return decays when timing or price moves against you.
How Australian state factors move your Internal Rate of Return (IRR)
The Internal Rate of Return (IRR) calculation itself does not change across the eight states and territories. A rate is a rate in Perth, Hobart or Darwin. What changes, and changes a lot, is the cashflow timing that drives the rate, because several of the factors that set a development’s timeline and holding costs are determined at the state or territory level. Two projects with identical profit can produce different Internal Rate of Return (IRR) figures purely because of where they sit.
The largest lever is the planning approval timeline, because nothing erodes an Internal Rate of Return (IRR) like time spent holding land that is not yet producing. The pathways, the names and the typical timeframes differ by jurisdiction:
- In New South Wales (NSW), most projects run through a Development Application (DA) to the local council or a regional panel, and recent reforms aimed at speeding up housing approvals, including the Low and Mid-Rise Housing Reform and the Transport Oriented Development Program, are directly relevant to the Internal Rate of Return (IRR) because faster approvals shorten the holding period.
- In Victoria (VIC), the equivalent is a planning permit through the responsible authority, with the state’s development facilitation pathways able to shorten timelines for eligible projects.
- In Queensland (QLD), development approval runs under the state’s planning framework, with code-assessable pathways generally faster than impact-assessable ones.
- In South Australia (SA), Western Australia (WA), Tasmania (TAS), the Australian Capital Territory (ACT) and the Northern Territory (NT), the assessment regimes differ again in name and timeframe, but the principle is identical: the longer the approval sits in the queue, the lower the Internal Rate of Return (IRR), regardless of the eventual profit.
Beyond approvals, several state-set costs add to holding charges that accumulate over the timeline and drag on the Internal Rate of Return (IRR):
- Transfer duty (stamp duty) on the land acquisition, levied by each state and territory at its own rates and thresholds, is a large cash outflow near the start of the project, and because the Internal Rate of Return (IRR) weights early cash heavily, the size and timing of duty has an outsized effect on the rate.
- Land tax carried from acquisition through to completion is a holding cost assessed under each jurisdiction’s own regime, and a longer hold in a higher land tax state compounds the drag.
- Developer contributions and infrastructure charges vary by council and state and can be a substantial outflow, with the timing of when they fall due affecting the rate as much as the amount.
The practical implication is that benchmarking an Internal Rate of Return (IRR) against a national rule of thumb without adjusting for the jurisdiction can mislead. A project in a state with fast approvals and lower holding costs can clear a hurdle that an identical project in a slower, higher-cost jurisdiction would miss, on the same profit. Modelling the real timeline and the real state costs is what makes the Internal Rate of Return (IRR) meaningful. With Feasly’s feasibility platform you can build the development cashflow on actual dates and read the project and equity returns off the same model, so the Internal Rate of Return (IRR) reflects the jurisdiction the site really sits in rather than a national average.
The Internal Rate of Return (IRR) in valuation and site acquisition
The Internal Rate of Return (IRR) does not only appear in the developer’s own feasibility. It also sits, from the other side, inside how a development site is valued and how much a developer can justify paying for it.
When a valuer assesses a development site using the residual or hypothetical development approach, they work backwards from the projected end value, deduct the costs of delivering the project, and deduct an allowance for the developer’s profit and risk before arriving at the residual land value. Discounted cash flow methods, with their embedded Internal Rate of Return (IRR), are one of the two dominant ways of arriving at site value before acquisition. A research note published by the Greater London Authority sets out how an Internal Rate of Return (IRR) is implied within a conventional residual valuation of a development site, and the same logic applies in Australian practice: the profit and risk the valuer builds in is, in effect, a required return, and raising it lowers the land value.
Australian valuation work is carried out against the standards of the Australian Property Institute (API), whose guidance on valuation approaches and methods covers how the discounted cash flow and residual approaches are applied. The Australian Taxation Office (ATO), in its guidance on valuation issues, also expects discounted cash flow work to use realistic, market-based inputs: it points to the Reserve Bank of Australia (RBA) cash rate as a reference for the interest rates used and stresses that the profit and risk allowances should reflect what could reasonably be expected rather than convenient assumptions. The Australian Taxation Office’s broader market valuation guidance carries the same expectation of supportable inputs.
For a developer, the point is that the Internal Rate of Return (IRR) sitting inside the valuer’s residual calculation and the Internal Rate of Return (IRR) sitting inside the developer’s own feasibility are the same lever viewed from two seats. The land price a developer can justify falls as their required Internal Rate of Return (IRR) rises, which is exactly the relationship that runs through the residual land value guide. Setting the hurdle too low to win a site is one of the quieter ways a developer overpays.
A worked development example, end to end
Take a small project and run a realistic, dated cashflow at the equity level to see how the Internal Rate of Return (IRR) behaves, and what happens when the timeline slips. All figures are indicative and ex-Goods and Services Tax (GST).
Assume a developer funds the equity slice of a project as follows, with construction funded by a loan whose interest is capitalised and repaid from settlements:
| Date | Cash flow | Description |
|---|---|---|
| 1 Jul 2026 | −$1,500,000 | Equity for land and acquisition costs |
| 1 Jan 2027 | −$300,000 | Further equity for early works and fees |
| 1 Jul 2028 | +$2,400,000 | Net proceeds to equity after the loan is repaid |
Total equity in is $1,800,000; total back to equity is $2,400,000; the profit is $600,000. On those dated cashflows, the equity Internal Rate of Return (IRR), calculated with XIRR against the real dates, is approximately 16 per cent, and the equity multiple is about 1.33 times (the developer gets back $1.33 for every dollar in).
Two things are worth reading off this. First, the equity Internal Rate of Return (IRR) of around 16 per cent is higher than the project (unlevered) Internal Rate of Return (IRR) would be on the same deal, because the construction loan did some of the heavy lifting and lifted the return on the thinner equity base. Second, the 16 per cent rate and the 1.33 times multiple are telling two different stories: the rate says the money worked at about 16 per cent a year, the multiple says it grew by a third in total. Both are needed.
Now stress the timing. Suppose sales run slow and the settlement that was due on 1 Jul 2028 slips a full year to 1 Jul 2029. Nothing else changes: the same $2,400,000 comes back, the same $600,000 profit, the same 1.33 times equity multiple. But the equity Internal Rate of Return (IRR) falls from around 16 per cent to roughly 10 per cent. A single year of delay, with no change in profit at all, has cut the annualised return by about a third. That is the timing lesson made concrete, and it is exactly why a developer should never quote an Internal Rate of Return (IRR) off an optimistic timeline without showing what a realistic delay does to it. The equity multiple held firm while the Internal Rate of Return (IRR) collapsed, which is precisely why the two belong side by side.
Common mistakes that distort the Internal Rate of Return (IRR)
A figure can be calculated correctly and still mislead, usually because of how the cashflow was built. The recurring errors worth checking for:
- Modelling in annual buckets instead of real dates. Using plain IRR on evenly spaced periods when the real cash lands on irregular dates. Use the XIRR approach against actual settlement and drawdown dates.
- Quoting the rate without the multiple. An Internal Rate of Return (IRR) with no equity multiple beside it hides whether the deal makes meaningful dollars. Carry both.
- Mixing project and equity Internal Rate of Return (IRR). Quoting an unlevered rate to an equity partner who expects the levered one, or the reverse. State which you mean every time.
- Building off a best-case timeline. The Internal Rate of Return (IRR) is so timing-sensitive that an optimistic programme can flatter the rate badly. Always show a delayed case.
- Chasing a high rate on a tiny deal. A spectacular Internal Rate of Return (IRR) on a small, short project can deliver less profit than a steadier rate on a larger one. Size matters.
- Ignoring the reinvestment and multiple-rate issues on lumpy cashflows. Where a project has late capital calls, reach for the Modified Internal Rate of Return (MIRR) for a single, conservative figure.
Frequently asked questions
What is the Internal Rate of Return (IRR) in property development? The Internal Rate of Return (IRR) is the annualised rate of return implied by a project’s dated cashflow, defined as the discount rate at which the Net Present Value (NPV) of all cash in and out equals zero. It measures how hard the developer’s money worked per year, accounting for exactly when each dollar went in and came back.
What is a good Internal Rate of Return (IRR) for a development? There is no universal figure. A workable Internal Rate of Return (IRR) is one that clears the developer’s cost of capital and compensates for the specific risk of the project, typically a risk-free rate plus a risk premium. Because a development carries real planning, construction and sales risk, targets are commonly set well above what a passive investment would return, though the number varies with the cycle and the deal.
What is the difference between project Internal Rate of Return (IRR) and equity Internal Rate of Return (IRR)? The project (unlevered) Internal Rate of Return (IRR) measures the development as if funded entirely with cash, with no debt, and reflects the quality of the project itself. The equity (levered) Internal Rate of Return (IRR) measures the return on the developer’s own equity after debt is drawn and repaid. The equity figure is usually higher when borrowing is accretive, but it also carries the added risk that leverage brings.
Should I use IRR or XIRR for a development feasibility? Use the XIRR approach. Development cashflows arrive on irregular dates (land settlement, construction drawdowns, pre-sale settlements, final sales), and plain IRR assumes evenly spaced periods, which distorts the result. XIRR uses the actual calendar dates and is the appropriate calculation for almost every development.
Why is the Internal Rate of Return (IRR) sometimes misleading? The Internal Rate of Return (IRR) ignores absolute dollars, so a high rate can sit on a small profit; it flatters short holds and can be engineered by pulling cash forward; and it can produce multiple values on cashflows that change sign more than once. Pairing it with the equity multiple, the Net Present Value (NPV), and a downside case, or using the Modified Internal Rate of Return (MIRR), addresses these blind spots.
A note for developers working across the Tasman
The Internal Rate of Return (IRR) travels to New Zealand unchanged as a metric, and the same Bond University research surveyed developers across both Australia and New Zealand, finding broadly similar hurdle-rate practices. The inputs underneath the rate differ, though, in ways that move the cashflow and therefore the Internal Rate of Return (IRR). New Zealand has no transfer duty (stamp duty) on land, which removes a large early outflow that an equivalent Australian project carries, and because the Internal Rate of Return (IRR) weights early cash heavily, that absence lifts the rate relative to a comparable Australian deal. Goods and Services Tax (GST) runs differently as well, with no margin scheme equivalent, so the netting of sales proceeds into the cashflow works on a different basis. The planning timeline, which drives the holding period and so the rate, runs through the resource consent system rather than an Australian Development Application (DA). The metric is the same lever; the cashflow it reads is built from different parts.
The bottom line
The Internal Rate of Return (IRR) is the one feasibility metric that takes timing seriously, and for a developer that is exactly why it matters. It rewards getting capital back quickly and punishes delay, it annualises returns so projects of different lengths can be compared on a common footing, and it splits cleanly into a project rate that tests the deal and an equity rate that measures what the developer actually earns. It is also easy to misread: it says nothing about absolute dollars, it flatters short holds, and it can be engineered or, on lumpy cashflows, produce more than one answer. The disciplined approach is to calculate it on real dates with the XIRR method, lead with the equity figure when raising capital, always carry the equity multiple alongside it, and stress the timeline before quoting a rate to anyone. Set the hurdle to match the risk of the actual deal, not a number from a blog, and the Internal Rate of Return (IRR) becomes what it should be: a clear read on how hard the money is working, and a check on how much a delay would cost.