The Hidden Risks Behind a 20% Real Estate IRR

A projected 20% internal rate of return can make a real-estate development look compelling. But IRR is the output of a model, not evidence that the return will occur. The result depends on construction cost, delivery timing, occupancy, rent, operating expenses, financing, exit value and the cash actually distributed to investors.

This article rebuilds an illustrative €40 million development case to show where the headline return comes from, which facts must support it, and how quickly the apparent cushion can disappear when several assumptions weaken together.

Start with what exists today

Before examining any return forecast, establish the project’s current state. An investor should be able to distinguish completed facts from pending steps and management assumptions.

• Who owns or controls the site, and under what agreement?
• Is zoning in place, and which permits remain outstanding?
• Has the design been completed and independently costed?
• Are the construction contract, contingencies and completion support defined?
• Are tenants signed, under negotiation or only assumed in the model?
• Is the financing committed, indicative or still being sought?
• Which forecast inputs come from third-party evidence?

A sophisticated spreadsheet cannot compensate for an unresolved site right, an unapproved permit, an unpriced construction package or an unsupported leasing assumption. These items determine whether the model describes a financeable project or merely a possible future scenario.

Follow the full €40 million sources and uses

The illustrative case has a total development cost of €40 million, funded with €24 million of construction debt and €16 million of equity.

Capital source	Amount	Share of total cost
Construction debt	€24 million	60%
Investor equity	€16 million	40%
Total sources	€40 million	100%

The 60% loan-to-cost ratio is only the starting point. Investors also need a complete uses schedule covering land, construction, professional fees, financing costs, leasing costs, taxes, contingency and reserves. The funding plan should show when each euro is required, whether debt and equity are contributed proportionately, and who funds an overrun.

A model can balance at €40 million while still omitting important cash requirements. Interest during construction, delayed tenant income, lender fees, reserve accounts and sales costs may all affect the final equity requirement.

Rebuild the value rather than accepting it

The case assumes €3 million of stabilized net operating income and a 6.0% exit capitalization rate. Applying the direct-capitalization formula produces an implied stabilized value of €50 million:

€3.0 million NOI ÷ 6.0% exit cap rate = €50 million implied value

The corresponding yield on cost is 7.5%:

€3.0 million NOI ÷ €40 million development cost = 7.5% yield on cost

The apparent gross value creation is therefore €10 million before financing costs, taxes, transaction costs, reserves and any incentive or promote payable to the sponsor. That cushion must compensate investors for development, leasing, financing and exit risk. It should not be treated as distributable profit without a complete cash-flow bridge.

Pressure-test the stabilized NOI

NOI is often the most important operating assumption in a development valuation. It should be reconstructed from physical and commercial evidence:

1. Start with lettable area and unit mix.
2. Apply market-supported rent by unit type.
3. Deduct vacancy, rent-free periods, incentives and bad debt.
4. Add only recurring ancillary income that can be evidenced.
5. Deduct property operating expenses on a stabilized basis.
6. Reconcile the result to leases, broker evidence and comparable assets.

The timing matters as much as the stabilized amount. A property may eventually reach €3 million of NOI but take longer than expected to do so. Extra months of interest, operating deficits and delayed distributions can reduce IRR even when the final valuation remains unchanged.

The exit cap rate can change the entire result

The exit cap rate converts one year of forecast NOI into terminal value. A small change can materially alter equity value, especially when debt is outstanding.

Scenario	Stabilized NOI	Exit cap	Implied gross value	Value above €40M cost
Illustrative base	€3.00M	6.00%	€50.00M	€10.00M
Moderate correlated downside	€2.70M	6.50%	€41.54M	€1.54M
Severe correlated downside	€2.55M	6.75%	€37.78M	–€2.22M

These downside values are arithmetic illustrations, not forecasts. They show why NOI and exit assumptions should not be tested independently. Weaker demand can reduce rent and occupancy while the same market conditions push buyers to require a higher cap rate. When both move against the project, the valuation effect compounds.

Can the debt survive the business plan?

A €24 million construction loan represents 60% of cost, but loan-to-cost alone does not show whether the debt is serviceable or refinanceable. The investment materials should explain:

• interest rate, fees, maturity and extension options;
• the draw schedule and interest-capitalization mechanics;
• recourse, guarantees and completion support;
• cost-overrun and contingency requirements;
• pre-leasing, valuation and completion covenants;
• the conversion or refinancing conditions at stabilization; and
• the expected debt balance when the property is sold or refinanced.

Debt-service coverage ratio cannot be calculated from the €24 million balance alone. It requires the interest rate, amortization profile and annual debt service. Any presentation that quotes DSCR without showing those inputs prevents investors from reproducing the result.

Refinancing also introduces a second underwriting event. The property may complete successfully yet fail to support the expected permanent loan if NOI is lower, interest rates are higher or the lender applies a more conservative valuation.

IRR and equity multiple answer different questions

IRR is sensitive to both the amount and timing of cash flows. Earlier distributions generally increase IRR; delays reduce it. The equity multiple compares total cash returned with total equity invested but does not directly account for time.

Metric	Question answered	Important limitation
Project IRR	What annualized return does the project-level cash-flow timing imply?	May exclude investor-level fees, waterfall terms or taxes
Investor net IRR	What annualized return is modeled for the investor after applicable deductions?	Highly sensitive to dates, distributions and exit assumptions
Equity multiple	How much total cash is returned for each euro invested?	Does not distinguish between a fast and a slow return
Yield on cost	What stabilized property yield is produced by total development cost?	Does not capture timing, financing or sale proceeds

A 20% project IRR is not automatically a 20% return to an individual investor. The bridge from property cash flow to investor distributions may include asset-management fees, financing fees, acquisition or development fees, reserves, preferred returns, carried interest, promote structures and taxes. Each layer should be shown explicitly.

Label every input by evidence status

An investor-ready model should separate inputs into clear categories:

• Historical: supported by completed financial or operating records.
• Contracted: supported by executed leases, debt documents or construction contracts.
• Third-party: supported by appraisals, cost reports, market studies or broker evidence.
• Management assumption: a forecast that remains to be achieved.
• Sensitivity: an alternative input used to test risk rather than predict an outcome.

This classification makes the model auditable. It also shows where additional diligence can reduce uncertainty before investors or lenders are approached.

Seven questions before presenting the 20% IRR

1. What is complete today, and which approvals, contracts and funding commitments remain outstanding?
2. Do all sources and uses reconcile, including financing costs, contingency and reserves?
3. Can the €3 million NOI be rebuilt from rent, occupancy, incentives and operating expenses?
4. What evidence supports the 6.0% exit cap, and what happens if it expands?
5. Can the project comply with the construction loan and refinance under a realistic downside?
6. How do project cash flows become net investor distributions after fees and the waterfall?
7. What happens when cost, timing, NOI and exit assumptions deteriorate together?

Frequently asked questions

Is a 20% real-estate IRR attractive?

It may be attractive relative to its risk, but the percentage alone is insufficient. Investors must examine the evidence, leverage, timing, downside exposure, equity multiple and net distribution waterfall behind the calculation.

Why can a delay reduce IRR?

IRR rewards earlier cash receipts. A delay can postpone rent and sale proceeds while increasing interest, operating deficits and other carrying costs. The annualized return can therefore fall even if the eventual sale price remains the same.

What is the main risk in the illustrative case?

No single input determines the outcome. The central risk is correlation: higher cost, slower leasing, lower NOI, tighter refinancing and a higher exit cap can occur together and consume the base-case value cushion.

Treat IRR as a conclusion to be proved

A credible real-estate investment case allows another analyst to trace every important conclusion back to a document, calculation or clearly labeled assumption. The €40 million example shows that a 20% headline return should begin the diligence discussion, not end it.

This article and video use an illustrative teaching case and provide general educational information only. They are not an offer, forecast, valuation, or investment, lending, legal, tax or financial recommendation.