Project finance: repay lenders mainly from one project's future cash flow

Project finance is built around the cash flow and assets of a defined project rather than the general balance sheet of the sponsor alone. Infrastructure, energy, property and other long-life projects can use a special-purpose company whose lenders rely primarily on contracted project revenue and have limited recourse beyond the project structure.

The project is usually separated into a dedicated company

A special-purpose vehicle can own the project assets, enter construction and operating contracts, receive customer or concession revenue and borrow the project debt. Separation makes it easier for lenders to analyse one project's economics and security.

The sponsor still contributes equity and can provide completion support, guarantees or other undertakings during higher-risk phases. Limited recourse does not mean the sponsor has no obligations.

Debt capacity comes from forecast project cash

Lenders model the revenue contract, operating cost, tax, maintenance and required reserves to calculate the cash available for debt service. Debt-service coverage ratios are therefore central to the structure.

Long-term contracted revenue is easier to finance than speculative revenue. A project selling all output at uncertain market prices can support less leverage than one with a strong long-term offtake contract.

Completion risk is different from operating risk

Before a project operates, lenders face construction delay, cost overrun and performance risk. Engineering contracts, contingency budgets and sponsor support can protect against those risks.

After completion, attention shifts toward operating performance, customer payments, maintenance and market risk. The finance documents often change tests or release sponsor support after completion conditions are met.

Lender recourse is concentrated on project assets and contracts

Project lenders commonly take security over shares in the SPV, bank accounts, project assets and material contracts. HMRC's public-infrastructure guidance also recognises limited-recourse financing where creditor recourse is tied to relevant infrastructure assets and income.

Key contracts can require lender step-in rights so the project can continue operating after default rather than being dismantled immediately.

Reserve accounts protect debt service and lifecycle costs

A DSRA can hold future principal and interest, while maintenance or major-repair reserves can accumulate cash for known long-term costs.

These balances are restricted rather than free sponsor cash. The project model should include the equity needed to fund reserves and the conditions for releasing them.

Project lenders receive detailed reporting and control rights

The borrower can face limits on distributions, additional debt, asset sales and contract changes. Lenders can require technical reports, insurance evidence and regular financial models.

Management should operate from the financing model after closing rather than treating it as a one-time bank document. Changes in construction cost or revenue need to flow through debt-service forecasts quickly.

Worked example: a renewable-energy SPV needs £100 million to build an asset expected to operate for 25 years. Sponsors contribute equity, lenders provide long-term debt and the project signs a revenue contract. Once construction is complete, lenders expect interest and principal to be paid mainly from project revenue after operating costs and required reserves.

Stress completion date, output, price and operating cost independently. Project finance can tolerate high leverage only because the cash flow is modelled in detail and contractual protections reduce uncertainty.

Keep project accounts separate from sponsor operating cash. Transfers to sponsors normally follow a distribution waterfall and covenant tests rather than ordinary group treasury sweeps.

Use a financial model that follows the project from construction through operating maturity. It should show drawdowns, construction cost, contingency, revenue ramp, operating expenses, taxes, reserve funding and debt service. Lenders will test how each assumption changes debt coverage rather than accept a single base-case return.

Worked example: a waste-to-energy project costs £120 million and is financed with £40 million sponsor equity and £80 million debt. Construction is delayed by six months and costs rise £8 million. The project can need extra sponsor equity before it produces any revenue, even though the long-term operating case remains profitable.

Monitor contract counterparties as credit risks. A project can have strong physical assets but depend on one offtaker, concession authority or construction contractor. If that counterparty weakens, the lender's projected cash flow can deteriorate without any change in the project's engineering performance.

Keep reserve releases and distributions subject to the agreed waterfall. Sponsors should not treat project cash as freely upstreamable merely because the bank account is positive after one strong quarter.

Use independent technical advisers where the lenders require them. Construction progress, output assumptions and major maintenance forecasts can be too specialised for finance teams to validate alone, and technical reports can directly affect drawdown and distribution permissions.