This is the fifteenth installment in the structural analysis series from the Public Asset Utilization Research Lab (ISVD-LAB-005). It classifies PPP/PFI risk allocation design into three categories and analyzes the structural patterns through which design failure leads to project collapse.
What Is Happening
When a PPP/PFI project breaks down mid-course, risks that were never clearly addressed in the contract are almost always surfacing. Voluntary withdrawal by private operators, damage claims against municipalities, non-competitive re-tenders — all trace back to design failures in "who bears which risk."
The Cabinet Office reports a cumulative PFI project count of over 1,000. Analysis of the subset that underwent contract modifications, early terminations, or private-sector financial deterioration during the project period consistently underscores the importance of risk allocation design.
Risk allocation is not a question of "who to push risk onto." The only valid criterion for design quality is whether the party bearing a given risk has the ability to control it.
Background and Context
The Core Principle of Risk Allocation
The Cabinet Office guidelines on PFI implementation processes (Cabinet Office Guidelines) define the core principle of risk allocation as: "the party better positioned to manage a given risk should bear that risk." This is the same logic that underpins VFM (Value for Money — the metric measuring how much cheaper private-sector delivery is compared to direct public-sector provision).
In practice, however, municipalities often approach risk with the mindset of "transfer as much as possible to the private sector." Private operators then price that risk burden into their bids, inflating apparent contract costs. Shifting risk does not make it disappear. It returns — as a contract price.
Three Patterns of Risk Allocation
PPP/PFI risk allocation falls into three broad patterns.
Pattern A: Fixed demand (publicly guaranteed)
The municipality bears all demand risk and pays the private operator a fixed service fee regardless of utilization. This is common in PFI for hospitals, schools, and government buildings. From the private sector's perspective, demand volatility risk is absent — but so is pricing leverage. From the municipality's perspective, there is a risk that the private operator has no incentive to grow demand. Differentiation from the designated manager system's user-fee model is difficult, and "why PFI?" tends to collapse into "installment financing for construction costs."
Pattern B: Actual demand (private-sector bearing)
The private operator bears demand risk and receives revenues tied to actual utilization — the model typified by Park-PFI café operations and airport concession commercial revenues.
Private operators have strong incentives to generate demand, but unexpected demand collapses (pandemics, population decline, closures of adjacent facilities) can drive private-sector insolvency and facility closure. When this risk materializes, who bears the cost of reactivating the facility is typically absent from the contract.
Pattern C: Shared demand (public–private joint bearing)
Demand fluctuations within a defined band (for example, ±20% of projected demand) are borne by the private operator; variations beyond that threshold are shared between public and private parties. This approach approximates the logic of Pay-for-Success (PFS) — where payment is tied to outcomes — and has been adopted in some PFI projects.
This is the most complex pattern to design and creates higher barriers to private-sector participation. The indicators triggering risk sharing, and the payment adjustment formula once triggered, must be determined in advance.
Reading the Structure
Three Failure Patterns in Risk Allocation Design
Analysis of domestic PFI failure cases reveals three recurring patterns of design inadequacy.
Failure Pattern 1: Omitting the question "who can actually control this risk?"
Assigning construction cost escalation entirely to the private operator is only rational when the private operator can control those costs. However, rapid increases in materials and labor are market-wide phenomena beyond any single operator's control.
Construction cost increases of 10–20% year-on-year in 2022–2023 severely disrupted the financial projections of long-term PFI contracts designed on fixed-price assumptions. This experience has since driven the standardization of price escalation clauses (escalation clauses) in new contracts.
Failure Pattern 2: Processing unallocated risks under "other" with "to be determined by negotiation"
Including a catch-all "other risks" line in the risk matrix with "to be determined through consultation" as the designated bearer invites disputes. When events arise during the project period that both parties claim fall under "other," negotiations collapse easily.
Pandemics, natural disasters, and changes in legislation (including amendments to laws governing PPP/PFI) are typically relegated to the "other" category — yet each can be analyzed in advance through the lens of "who is better positioned to control it?" and "can it be hedged through insurance or other instruments?" to determine a proper bearer.
Failure Pattern 3: Locking in risk assumptions across a 30-year contract
Concession contracts typically run 20 to 30 years. Risk allocation determined at signing is designed to hold throughout — but fundamental shifts in socioeconomic conditions can completely alter the risk profile.
In water concessions, the attribution of revenue risk from faster-than-projected population decline has become a flashpoint. Projecting demand 30 years out with precision is impossible. Building into the initial design a mechanism for periodic risk reassessment and contract adjustment is essential.
Risk Matrix Design Principles
| Risk category | Allocation principle | Design considerations |
|---|---|---|
| Demand volatility | Public, private, or shared | If shared, quantify triggering conditions |
| Construction cost | Private (within range) + public (excess) | Set upper and lower bounds in escalation clause |
| Legislative change | Public (direct change) + private (indirect effects) | Classify by scope and magnitude of impact |
| Materials costs exceeding ±15% of contract price | Shared (index reference method) | Verify annually against construction price index; update unit price schedule |
| Facility damage (natural disaster) | Private (insurance coverage) + public (excess) | Specify insurance conditions in contract |
The two essential design criteria are: "whose actions can control this risk?" and "has the calculation formula for when this risk materializes been agreed in advance?" Any risk item where these two questions lack clear answers is a candidate for contract modification, dispute, or early termination.
References
PPP/PFI Promotion Action Plan (FY2025 revised edition) — Cabinet Office. Cabinet Office
Guidelines on PFI Implementation Processes — Cabinet Office Private Finance Utilization Promotion Office. Cabinet Office
Status of PFI Projects (as of end of March 2024) — Cabinet Office Private Finance Utilization Promotion Office. Cabinet Office
Construction Work Survey — Ministry of Land, Infrastructure, Transport and Tourism (e-Stat). e-Stat