Project Finance Model

Model construction, operations, debt sculpting, DSCR and project returns.

D3 · Financial Modeling

Project Finance Model

Model construction, operations, debt sculpting, DSCR and project returns.

Architecture Inputs Formula logic Worked example Controls Common errors Q&A

Model architecture

Construction period sources and uses.
Drawdown and IDC schedule.
Operating volume and tariff model.
Debt service and reserve accounts.
Project and equity returns.

A professional model should make the decision logic visible. Inputs belong in a controlled assumption area; calculations should be formula-driven; outputs should state units, dates and scenarios; checks should be obvious and actionable.

Core inputs

Construction cost and timing
Tariff and capacity factor
Operating cost
Debt terms
Tax and concession life

Evidence rule: historical figures should reconcile to approved financial statements or management data. Forecast assumptions should show an owner, date, source and rationale.

Formula logic

Relationship	Use
`CFADS = EBITDA − Cash tax − Maintenance capex − Working capital changes`	Model formula / relationship
`DSCR = CFADS ÷ Debt service`	Model formula / relationship

Use the formulas as design relationships, not as substitutes for the accounting policy, contract definition or transaction facts relevant to the model.

Practical example

Debt sculpting sets principal repayment so each period meets a target DSCR, subject to maturity and lender constraints.

How to implement

Load the historical base and reconcile it.
Put assumptions in dedicated cells.
Build the schedule from operational drivers.
Link outputs to financial statements and dashboards.
Run base, upside and downside checks.

Control checks

Construction sources equal uses
IDC is funded correctly
Debt balance amortises to zero
DSCR uses document definition
Reserve accounts roll forward

Finin2min crux: the model is credible only when a reviewer can trace a conclusion to evidence, assumptions and formula logic without guessing.

Common modeling errors

Using EBITDA as CFADS
Ignoring construction delays
Not separating project and equity IRR
Missing major maintenance
Applying taxes before loss carry-forward

Practical Q&A

Should the model contain all possible detail?

No. It should contain enough detail to answer the decision question and explain material risks. Excess detail can hide the drivers.

Should a formula ever contain a hardcoded number?

Only for constants that are genuinely universal or immaterial. Business assumptions should be linked to visible input cells.

What is the minimum review standard?

Reconcile historical data, test key formulas independently, scan for hardcodes and errors, verify scenario switches, and review outputs under downside assumptions.

Source framework: ICAI Ind AS resources, notified accounting standards, Schedule III presentation principles, transaction documents and approved management data. The linked workbook templates are educational starting points, not valuation opinions.