How should sponsors allocate cost overruns in infrastructure financing?

Cost overruns in infrastructure project finance must be allocated before the project reaches the point at which additional money is urgently needed. A sponsor that assumes lenders will automatically increase a loan when construction becomes expensive may discover that the financing documents impose a strict commitment cap. Equally, lenders cannot assume that every shortfall is recoverable from sponsors unless the equity support and guarantee arrangements create enforceable obligations.

The correct allocation depends on the project budget, EPC contract, debt commitments, equity contribution agreement, completion support, contingencies and events giving rise to additional costs. In Pakistan, a project SPV may have separate legal personality, and sponsor support is ordinarily determined by enforceable documents rather than ownership alone. A shareholder's investment does not automatically constitute an unlimited commitment to fund all future overruns.

Define what counts as a cost overrun

An overrun can arise from higher equipment prices, scope variation, interest during construction, exchange-rate changes, tax or customs costs, delay, unexpected ground conditions, regulatory changes or a revised construction programme.

Each cause may be allocated differently. A contractor-caused defect may be recoverable under the EPC contract, while a sponsor-approved scope expansion may be borne by the SPV or sponsors. A change in law may require examination of concession or offtake compensation arrangements.

The financing model should distinguish original budget, approved contingency, committed financing and the amount remaining to complete the project.

Establish the base funding commitments

Review equity subscription agreements, shareholder loan commitments, senior financing agreements, drawdown schedule and conditions precedent. Identify whether sponsor equity must be contributed before debt, proportionately with debt or upon specified events.

A lender may make disbursement conditional on sufficient equity being injected and a satisfactory cost-to-complete assessment. If project costs increase materially, the condition may cease to be satisfied even where earlier funds were fully drawn.

All parties should understand that an approved project model is not itself a contractual obligation by each sponsor to supply any amount shown in future revisions.

Equity-first and debt-equity ratios

Project finance often requires a negotiated debt-equity ratio and restrictions on additional debt. If costs increase, the agreement may require sponsors to contribute the incremental amount as equity before lenders consider further disbursement.

The financial consequences can be substantial for minority sponsors who lack additional capital. The shareholders' agreement should explain what happens if one sponsor cannot meet an equity call.

Possible mechanisms include dilution, shareholder loans, default transfers or third-party investment, subject to company law and the negotiated structure. Their enforceability should be checked before project distress occurs.

Completion support and cost-overrun guarantees

Lenders may require sponsors to provide a completion undertaking, an equity support letter or a defined guarantee. The instrument should state the amount or formula, triggering event, expiry and conditions for release.

An unlimited undertaking to ensure completion has very different commercial implications from a capped contingency contribution. Sponsors should understand whether support survives commissioning or falls away after specified tests.

The lender should ensure that the signatories have corporate authority and financial capacity to honour the obligation. A parent-company comfort letter may not create the same enforceable payment duty as a carefully drafted guarantee.

Identify the party responsible for the underlying event

A fixed-price EPC contract may transfer some construction cost risk to the contractor, subject to variations, employer risk, force majeure and other contractual exceptions. It does not automatically cover every delay or unexpected expense.

The project SPV should maintain separate claims against contractors, insurers, public authorities or suppliers where the documents support them. Sponsor funding may be needed temporarily even where a third-party recovery is pursued later.

The parties should avoid assuming that a claim against a contractor will produce cash soon enough to meet debt-service or commissioning obligations. The finance plan should distinguish immediate liquidity from ultimate risk recovery.

Scope change and variation control

Uncontrolled design development can create cost overruns that lenders did not approve. Define who can authorise variations, how their cost and time consequences are assessed and what lender consent is needed for material changes.

A board resolution approving a variation should be checked against reserved matters in the financing agreement and concession. The SPV may need to demonstrate funding availability before instructing work.

Documentation should show the business reason for the change and whether alternatives were assessed. A legitimate technical improvement can still jeopardise project viability if no one has committed its cost.

Contingency funding and reserve accounts

A project budget should include a realistic contingency appropriate to technology, location, construction maturity and interface risks. The amount should be justified rather than used to conceal known unfunded obligations.

Contingency accounts and reserve mechanisms should have clear approval and replenishment rules. The contractor's use of contingency should be distinguishable from sponsor contributions and lender disbursements.

Once reserves are consumed, the finance documents should establish whether additional equity, subordinated funding or consent to further borrowing is required.

Exchange rate and imported equipment risk

Infrastructure projects may purchase foreign equipment while earning revenue in Pakistani rupees. Currency changes can increase capital costs and affect debt capacity.

The contracts should specify currency allocation, payment timing, hedging responsibilities where permitted and whether tariff or contract adjustment mechanisms provide relief. A financing model using one exchange rate throughout construction may materially underestimate exposure.

A sponsor should not assume that lenders will absorb exchange losses unless the documents expressly allocate them. Likewise, a project authority's change-in-law clause does not necessarily cover ordinary currency movements.

Delay costs and interest during construction

An extended construction period can increase financing charges, site overheads, staff expenses, insurance and bond costs. Even a project that stays within its equipment budget may exceed total project cost through delay.

Assess who caused the delay and whether the EPC or offtake arrangements provide compensation. The lender should review revised completion forecasts and financial covenants before approving any further drawdown.

A project can become overrun-funded but still unbankable if revenue commencement is postponed so far that repayment assumptions fail.

Sponsor default and dilution

A shareholders' agreement should address the consequences when one sponsor fails to fund an agreed capital call. Options may involve default interest, replacement funding, dilution or defined transfer rights, but their legality and proportionality require careful drafting.

The other sponsors should not assume they may simply take the defaulter's shares without observing company law and the agreed process. A sponsor dispute at a critical construction stage can delay completion.

A project manager should notify financing parties promptly where a committed equity contribution is at risk. Concealing the shortfall can breach reporting obligations and reduce restructuring options.

Additional lender financing and consent

A lender may agree to increase its facility or allow subordinated funding, but this is normally subject to credit approval, revised security, financial modelling and contractual amendment. Existing financing agreements may restrict additional debt or ranking.

New money should be allocated to specific costs and integrated into the cash waterfall. Intercreditor priority and enforcement rights matter if multiple funders participate.

Debt relief or refinancing should not be presented as guaranteed merely because the underlying project has strategic importance.

Stress testing the project

Before commitment, the parties should model plausible increases in EPC cost, delay, interest, operating expenses and revenue shortfalls. Sensitivity analysis should show whether sponsor support and contingency are adequate.

The stress cases should identify the circumstances in which distribution locks, default covenants or additional equity calls arise. A financial model should not hide a negative result by assuming that future refinancing is certain.

Independent engineering, legal and insurance reviews can test whether key risk transfers in the model correspond to enforceable project contracts.

A public transport project example

Suppose a project SPV procures electric buses funded by bank debt and sponsor equity. Import costs rise, a charging depot is delayed and vehicle acceptance moves several months beyond the original schedule.

The overrun analysis should allocate import currency costs, depot delay responsibility, financing charges and any available supplier or public-authority claim. Lender funding cannot be assumed to expand automatically.

A sponsor completion undertaking may require additional equity, while the EPC or supply contract may support a separate recovery. Both processes must be coordinated to ensure immediate liquidity and preserve eventual claims.

Protecting minority sponsors during emergency funding

Where several sponsors hold different equity stakes, the overrun mechanism should prevent one financially stronger sponsor from imposing arbitrary dilution under the pressure of imminent construction default. Notice of a cash call, independent verification of the shortfall, proportionate contribution rights and reasonable cure opportunities should be documented. A sponsor supplying emergency subordinated funds may negotiate priority or an agreed return, but the arrangement must respect the existing lenders, corporate approvals and transaction documents. Disputes about the reason for the overrun should not prevent necessary preservation of project assets, yet interim funding should be recorded without prejudicing the parties' substantive allocation rights.

Opinion and recommended approach

Project sponsors should allocate cost overruns through defined equity obligations, contingency arrangements, completion support, contractor risk allocation and lender-consent mechanisms. The documents should distinguish immediate funding responsibility from the party ultimately liable for the event causing the overrun.

The recommended approach is a cost-to-complete test at each material milestone, a clear funding waterfall for overruns, enforceable sponsor commitments and procedures for defaulting equity contributors. The financing model, shareholders' agreement and EPC contract should tell the same story.

Principal authorities for verification: Companies Act, 2017; Contract Act, 1872; applicable Pakistani secured-transactions and project-sector law; the SPV's articles and shareholder agreement; facility, security, completion-support, EPC, concession and offtake documentation.