Due Diligence Fees in Project Finance Transactions

Due diligence fees fund the work required to determine whether a project is technically feasible, legally deliverable, commercially supportable and capable of servicing the proposed debt. They usually arise after an initial mandate screening and before lenders commit substantial internal and external underwriting resources.

Project finance underwriting extends far beyond the sponsor's corporate financial statements. The review follows the project company, development rights, site, permits, construction contracts, operating plan, revenue arrangements, financial model, insurance program and security package. Each workstream must support the same base-case assumptions.

The fee structure should be documented before the detailed review begins. The engagement letter, fee letter or indicative term sheet should identify the amount, scope, payment date, refund treatment and any third-party expenses charged separately.

What Is a Project Finance Due Diligence Fee?

A project finance due diligence fee is an upfront charge or expense deposit used to fund the investigation of a proposed financing. It may compensate the lender, arranger or advisor for professional time. It can also fund independent engineers, legal counsel, model auditors, environmental consultants and other specialists.

The fee becomes relevant once the project appears sufficiently developed to justify formal analysis. The reviewing team must test the information provided by the sponsor and decide whether the project can proceed into detailed underwriting, credit approval, documentation and closing. A well-prepared project finance underwriting memorandum gives each specialist a consistent transaction record to review.

Payment authorizes defined work. Credit approval still depends on the diligence findings, lender appetite, risk allocation, documentation and satisfaction of all conditions precedent.

Why the Fee Is Paid Before Detailed Underwriting

Project finance requires multiple professional workstreams before a lender can reach a final credit decision. The lender may need independent technical, legal, insurance, environmental, market, tax and financial-model reviews. These specialists often begin work before the financing documents are negotiated.

The sponsor typically funds the agreed diligence process because the work is undertaken for its proposed transaction. The same commercial logic applies to advisory mandates, which is why project finance advisors charge upfront retainers before allocating senior execution resources.

Large infrastructure and industrial projects also require a structured development process. The World Bank PPP Reference Guide covers project preparation, appraisal, environmental and social diligence, procurement and contract management across the project cycle.

What Project Finance Due Diligence Fees Can Cover

Sponsor, Ownership and Equity Capacity

The lender begins by identifying the sponsor, beneficial owners and management team. The review covers development experience, sector expertise, previous project performance, litigation, insolvency history and the sponsor's ability to fund development costs and committed equity.

Equity must be supported by evidence. A lender may require bank statements, audited financial statements, investment committee approvals or subscription agreements. Contingent equity, standby equity and cost-overrun support also require clear terms and a creditworthy provider.

Project Company and Structural Review

Most limited-recourse structures place the project assets, contracts and cash flows in a dedicated project company. The diligence team reviews its constitutional documents, shareholder agreements, intercompany arrangements and restrictions on distributions or additional debt.

The structure must give lenders effective access to project cash flows and an enforceable security package. Our guide to project finance SPVs explains how the project company supports risk separation, contractual allocation and lender control.

Technical Feasibility and Construction Review

The independent technical advisor evaluates whether the proposed design can be built and operated as represented. The review can cover resource studies, geotechnical reports, interconnection, technology performance, equipment selection, site access and the reasonableness of capital and operating budgets.

Construction diligence focuses on the EPC contract, scope, schedule, price certainty, liquidated damages, performance guarantees, testing and completion standards. The reviewer also examines contingency levels and the financial capacity of the contractor and key equipment suppliers.

Operating assumptions must reconcile with the O&M contract, warranty package, maintenance schedule, spare-parts strategy and lifecycle replacement plan. Weak alignment between the technical report and financial model can delay credit approval.

Financial Model Audit and Debt Sizing

The financial model converts the project's contracts and operating assumptions into revenue, costs, taxes, cash flow and debt service. Lenders test formula integrity, timing conventions, circularities, accounting treatment, cash waterfalls and the consistency of inputs with the underlying documents.

Debt sizing depends on the applicable coverage ratios, leverage constraints, tenor, sculpting methodology and reserve requirements. Sensitivities can include construction delay, cost overruns, reduced output, higher operating costs, lower tariffs, counterparty default and refinancing risk.

An independent project finance model audit may be required before financial close. The auditor checks model mechanics and produces an exceptions report or reliance letter for the finance parties.

Revenue, Market and Offtake Review

Revenue diligence establishes whether the project's projected cash flow has contractual or market support. Availability-based infrastructure may depend on a concession payment. Energy projects may rely on a power purchase agreement. Industrial projects may require long-term product offtake or tolling arrangements.

The review examines price, volume, tenor, indexation, dispatch, curtailment, performance standards, credit support, termination compensation and assignment rights. Where revenue depends on a concentrated buyer, the lender also evaluates the buyer's credit quality and payment history.

Projects with contracted revenues can still retain merchant exposure after contract expiry or for uncontracted output. Financely's offtake agreement financing overview addresses how lenders analyze bankability and counterparty support.

Legal, Permitting and Land Due Diligence

Legal counsel reviews the project company's authority, development rights, land tenure, permits, licenses, material contracts and compliance with applicable law. The review also identifies consent requirements, change-of-control restrictions and potential conflicts among project documents.

Finance counsel evaluates the enforceability of guarantees, account controls, assignments, pledges, mortgages and direct agreements. Cross-border transactions may require local counsel opinions in several jurisdictions. Registration, notarization and security-perfection costs can form part of the external expense budget.

Permit status must match the construction schedule. A project with unresolved land access, environmental approvals, grid connection or concession rights may remain unfinanceable until those issues are resolved.

Environmental and Social Due Diligence

Environmental and social review can cover impact assessment, labor conditions, community health and safety, land acquisition, resettlement, biodiversity, Indigenous Peoples, cultural heritage and stakeholder engagement. The work may produce an environmental and social action plan with time-bound corrective measures.

The IFC Performance Standards provide a widely used framework for identifying and managing project-level environmental and social risks. The Equator Principles apply a related risk-management framework across qualifying project-related financing.

Category, sector and jurisdiction affect the scope and cost of the review. Higher-impact projects can require independent consultants, stakeholder consultation, biodiversity studies, resettlement planning and ongoing monitoring after closing.

Insurance, Tax and Accounting Review

Insurance advisors assess construction all-risk, delay-in-start-up, property damage, business interruption, liability and other project-specific cover. They review policy limits, exclusions, deductibles, insurer strength and lender endorsements.

Tax and accounting specialists may review project-company tax treatment, withholding taxes, transfer pricing, depreciation, tax incentives and the accounting treatment of shareholder instruments. Cross-border financing can require additional analysis of currency controls and repatriation.

How the Due Diligence Process Uses the Fee

Common Fee Categories in a Project Finance Mandate

Illustrative Project Finance Due Diligence Budget

Assume a sponsor seeks financing for a USD 100 million utility-scale solar project. The proposed financing requires a USD 425,000 diligence and external-advisor budget before final credit approval. The allocation below is illustrative. Actual costs vary by sector, jurisdiction, project stage, financing structure and advisor scope.

Are Project Finance Due Diligence Fees Refundable?

Refund treatment depends on the governing agreement. A professional fee may become earned when the review begins. An external expense deposit may be reconciled against invoices with the unused balance returned to the sponsor.

Some mandates use a hybrid structure. A fixed amount compensates the advisor or lender for internal work while a separate deposit funds third-party costs. The sponsor should understand whether unused funds are refunded, credited at closing or retained under the fee terms.

External costs can continue after a financing is declined or withdrawn because appointed professionals may already have completed substantial work. The signed fee letter and advisor appointment terms control the treatment of those costs.

What the Due Diligence Fee Does Not Cover

A due diligence fee does not provide development capital, sponsor equity or construction debt. It does not reserve a facility or create a binding financing commitment unless the executed documents expressly provide otherwise.

The fee can sit alongside interest, commitment fees, arrangement fees, agency fees, hedging costs, legal expenses and success fees. Each item should have a defined contractual basis and payment trigger.

Diligence can identify an unbankable risk allocation, unsupported revenue assumption, defective permit, inadequate equity commitment or unresolved technical issue. The reviewing party must remain able to decline the project or require corrective action.

When a Project Finance Due Diligence Fee Is Legitimate

Warning Signs Around Fee Requests

A fee request becomes concerning when the recipient cannot explain the underwriting work or identify the relevant professionals. Other warning signs include payment to an unrelated personal account, guaranteed approval and claims that large non-recourse financing can close without technical, legal or financial review.

Vague labels such as facility activation, banking-code registration or guaranteed commitment provide no substitute for an actual diligence scope. A credible process identifies the project, proposed financing, advisor responsibilities, information requirements and approval conditions.

Project finance rarely moves directly from a concept note to a binding commitment. The project must pass bankability, credit, compliance and documentation reviews before capital can be committed.

Questions to Ask Before Paying

• Which legal entity receives the payment?
• Which lender, arranger or advisor requested the review?
• What exact work begins after payment?
• Which external professionals will be appointed?
• Does the amount represent a fee, an expense deposit or both?
• Which additional costs require sponsor approval?
• Will third-party engagement letters or invoices be available?
• Is any unused balance refundable or creditable at closing?
• What happens if the sponsor withdraws or the lender declines?
• Which deliverables remain available to the sponsor?

How Financely Approaches Project Finance Due Diligence

Financely begins with project bankability. We review the sponsor, project company, development status, capital requirement, equity commitment, revenue model, technical package, permits, contracts and proposed sources of repayment.

The engagement scope can include transaction mapping, bankability review, financial analysis, underwriting memorandum preparation, data-room organization, capital structuring and lender materials. Our project finance deal packaging process is designed to give debt and equity providers a coherent review file.

Once the project is lender-ready, Financely approaches suitable banks, private credit funds, infrastructure investors and other capital providers on a best-efforts basis. Execution remains subject to independent diligence, provider appetite, credit approval and documentation. Sponsors can review our project finance debt and capital advisory services before submitting a mandate.

Financial close requires disciplined management of deliverables and conditions precedent. The project finance closing guide outlines how approvals, finance documents, security, equity funding and advisor sign-offs converge before first drawdown.

Project Finance Due Diligence Fee FAQs

Financely acts as an independent financial advisor and arranger. Financely is not a bank, direct lender, issuing bank, law firm, engineering firm, model auditor, environmental consultant, insurance advisor or guarantor and does not guarantee financing or transaction completion. Project finance mandates remain subject to project verification, KYC, KYB, AML, sanctions screening, technical review, environmental and social review, legal due diligence, financial underwriting, documentation, provider appetite and final approval by the relevant capital provider. Fee scope, refundability and expense treatment are governed by the applicable engagement letter, fee letter or financing documents.