Why Locking Capital Into Infrastructure Is a Feature, Not a Bug
Summary
Cambridge Associates data shows private infrastructur
e has delivered 13–14% net IRR over 20 years, compared to 9.8% for the S&P 500. For investors with the right horizon, illiquidity is not a constraint. It is the mechanism that delivers the premium.
The Premium Is Real and Measurable
The debate over whether illiquid assets compensate investors for locking up capital should be settled by the data.
Over the past two decades, private infrastructure has delivered 13–14% net IRR, compared to 9.8% annualised returns for the S&P 500. This represents a 3–4% annual illiquidity premium. It is not a theoretical construct, but a persistent return differential documented across multiple market cycles.
This finding is not isolated. It is consistent with data from institutional allocators and leading research firms tracking the asset class since the early 2000s.
The question is no longer whether the premium exists. The question is why it persists and how to capture it.
Why the Premium Persists
1. The $15 Trillion Infrastructure Gap
The structural driver is clear. There is a $15 trillion global infrastructure funding gap that governments alone cannot fill.
As long as this gap remains, and it is widening, private capital will continue to command a premium for stepping in where public funding falls short.
This is not cyclical. It is structural.
Energy transition, digital infrastructure expansion, supply chain reshoring, and circular economy transformation all require capital-intensive, long-duration assets with predictable cash flows.
2. Complexity as a Barrier to Entry
Infrastructure is not a passive asset class.
It requires regulatory approvals, technical expertise, local partnerships, and long development timelines.
This complexity filters out short-term and undisciplined capital. It reduces competition and improves entry pricing for experienced investors.
3. Contracted Cash Flows Reduce Risk
Unlike public equities driven by sentiment and market multiples, infrastructure returns are anchored in contracted, often inflation-linked revenues.
Examples include power purchase agreements, waste processing contracts, and long-term off-take agreements.
These contracts provide visibility over 10 to 25 years, transforming risk from speculative to structural.
The illiquidity premium is not compensation for higher risk. It is compensation for patience in assets with predictable cash flows.
The Impactus Approach to Illiquidity
At Impactus, lock-up periods are not compromises. They are intentional design features that align investor horizons with asset value creation.
Income Fund: 3-Year Lock-Up
The Impactus Income Fund focuses on stabilised, cash-yielding infrastructure assets with proven operating histories.
The 3-year lock-up allows consistent income generation, avoids forced exits, and ensures full capture of yield cycles.
For investors targeting 8 to 10 percent annual distributions, this is not restrictive. It is essential.
Project SPVs: 5 to 7 Year Lock-Up
For higher-return strategies, Impactus offers project-level SPVs covering the full infrastructure lifecycle.
Years 1 to 2 focus on permitting, engineering, and financial close.
Years 2 to 4 cover construction and commissioning.
Years 4 to 7 deliver operational ramp-up and stabilisation.
Exiting early means leaving the development premium on the table.
The lock-up ensures investors capture the full value creation cycle.
Case Study: Thermo Lysi and Contracted Infrastructure
Thermo Lysi’s pyrolysis operations in Greece illustrate the characteristics that underpin the illiquidity premium.
Contracted Revenue
Operations are supported by long-term waste processing agreements with municipal and industrial counterparties. This ensures predictable, contract-backed income.
Insured Physical Assets
Infrastructure is fully insured, including pyrolysis reactors, recovery systems, and storage facilities.
These are tangible, income-generating assets with defined replacement value.
Structural Demand Tailwinds
European regulations and circular economy policies are restricting landfill usage and increasing demand for waste-to-value solutions.
Thermo Lysi is not speculative. It is positioned within an already established regulatory framework.
Public vs Private: The Pyrum Benchmark
Pyrum Innovations AG, listed on Euronext Growth Oslo, provides a useful comparison.
As a public company in the same sector, Pyrum demonstrates commercial viability and the time required to reach operational scale.
However, it also highlights a key distinction.
Public markets introduce volatility.
Daily price fluctuations, short-term earnings pressure, and sentiment-driven valuation swings influence pricing.
In contrast, private infrastructure assets like Thermo Lysi are valued based on contracted cash flows, operational performance, and asset fundamentals.
This difference is critical.
It is the essence of the illiquidity premium. The same asset class is priced differently because of liquidity constraints.
What Institutional Allocators Already Know
Leading global investors treat infrastructure as a core allocation rather than a tactical trade.
Canadian pension funds allocate 15 to 25 percent to infrastructure.
Sovereign wealth funds treat it as a permanent asset class.
Endowments pioneered illiquidity-driven strategies decades ago.
These institutions do not invest despite illiquidity.
They invest because of it.
The Cost of Liquidity
Liquidity is often perceived as a benefit. In reality, it comes at a cost.
That cost is lower returns.
Liquid vehicles such as listed infrastructure funds and REITs typically trade at discounts to their private equivalents.
This is not because the assets differ. It is because the structure demands liquidity that the assets themselves do not naturally provide.
For an investor with a 5 to 7 year horizon, paying for daily liquidity is inefficient.
It is effectively buying optionality that the investment strategy does not require.
Illiquidity as Investment Discipline
The illiquidity premium is not an anomaly. It is a structural feature driven by:
- A persistent global infrastructure funding gap
- High barriers to entry and operational complexity
- Long-term contracted cash flows
- Public market mispricing of long-duration assets
At Impactus, our investment structures of 3 years for income strategies and 5 to 7 years for project SPVs are calibrated to capture this premium.
They are not constraints. They are the architecture of superior risk-adjusted returns.
For investors who understand that patience is a competitive advantage, illiquidity is not a cost to be avoided.
It is a reward to be earned.
Impactus Capital Partners
Impact infrastructure investment from Cyprus, deploying across Greece and the Mediterranean.
For qualified investors only. Past performance does not guarantee future results. Data references include Cambridge Associates (2004–2024), BlackRock Private Markets Outlook (2025), and industry benchmarks.
