Drawdown Schedule
Executive Summary
Key Takeaways
- ✓ A drawdown schedule shows the period-by-period timing and amount of debt and equity funding drawn during construction, distinct from the aggregate sources and uses statement.
- ✓ The sequencing of debt versus equity drawdown, known as funding competition, directly affects the total interest during construction cost.
- ✓ Common funding competition approaches are pro-rata (debt and equity drawn in fixed proportion each period), equity-first (equity fully drawn before any debt), and debt-first (debt fully drawn before equity, rare and generally lender-unfavourable).
- ✓ Lenders typically require equity to be drawn ahead of or alongside debt, not after, to ensure the sponsor bears its committed share of construction risk throughout the build.
- ✓ A drawdown schedule that does not tie back to the construction cost curve and the interest during construction calculation cannot be relied upon for funding requirement forecasting.
Definition¶
A drawdown schedule is the period-by-period profile of debt and equity funding actually drawn during a project finance construction phase, distinct from the sources and uses statement, which shows only the aggregate, total-position summary of funding sources and uses.
Why It Matters¶
The drawdown schedule determines the cumulative drawn debt balance in each construction period, which directly drives the interest during construction calculation. Because IDC is a real cost that increases the total funding requirement, the sequencing of debt versus equity drawdown, referred to as funding competition, is itself a modelling and structuring decision with a direct financial consequence, not a mechanical afterthought.
Technical Background¶
Funding Competition Approaches¶
Pro-rata drawdown. Debt and equity are drawn in a fixed proportion (matching the overall gearing ratio) in every construction period. This is the most commonly required approach, since it ensures the sponsor's equity risk is present throughout construction in the same proportion as at financial close.
Equity-first drawdown. All committed equity is drawn and applied to construction costs before any debt is drawn. This minimizes IDC (since debt drawdown, and therefore the interest-accruing balance, is deferred as late as possible) and is generally the most lender-favourable structure, since it means debt is only exposed once the sponsor's full equity commitment has already been applied.
Debt-first drawdown. Debt is drawn before equity. This is rare and generally lender-unfavourable, since it exposes lenders to construction risk before the sponsor's equity commitment is confirmed as applied, and it also maximizes total IDC by front-loading the interest-accruing debt balance.
Construction Cost Curve Alignment¶
The drawdown schedule should track the underlying construction cost curve, the period-by-period profile of costs actually incurred by the contractor, allowing for a short payment-processing lag. A drawdown schedule built independently of the actual construction cost curve, for example a simple straight-line assumption across the construction period, will misstate both the funding requirement in any given period and the resulting IDC calculation.
Common Errors¶
| Error | Description | Risk |
|---|---|---|
| Straight-line drawdown assumption | Debt and equity drawn evenly across construction periods regardless of actual cost timing | Misstates period-by-period funding requirement and IDC, particularly for projects with a non-linear cost curve (e.g. heavy early procurement) |
| Funding competition not modelled explicitly | Drawdown ratio between debt and equity not tied to an explicit, labelled assumption | Model cannot correctly test alternative funding competition structures during structuring negotiations |
| Drawdown schedule disconnected from contingency | Contingency drawdowns not integrated into the same drawdown mechanics as base construction cost | Total funding requirement understated when contingency is actually drawn |
Best Practices¶
Build the drawdown schedule as a period-by-period calculation tied directly to the construction cost curve, with the funding competition rule (pro-rata, equity-first, or debt-first) implemented as an explicit, labelled assumption rather than embedded inside a combined formula. Present the resulting cumulative drawn debt balance as a visible line feeding directly into the interest during construction calculation, so a reviewer can trace the full path from construction cost timing to total funding cost.
Continue Reading¶
Prerequisites¶
- What Is a Project Finance Model Audit? — the parent pillar
Related Glossary¶
Related Technical Guides¶
Related Products¶
- Financial Model Audit Engine (FMAE) — deterministic structural auditing referenced throughout this guide
How OXXON tests thisRun a free structural check with FMAE
Frequently Asked Questions
What is a drawdown schedule?
The period-by-period profile of debt and equity funding actually drawn during a project finance construction phase, as opposed to the total, aggregate funding position shown in the sources and uses statement.
What is funding competition?
The sequencing rule that determines the relative proportion of debt versus equity drawn in each construction period. Common approaches are pro-rata, equity-first, and debt-first.
Why do lenders typically require equity to be drawn first or pro-rata?
To ensure the sponsor bears its committed share of construction risk throughout the build, rather than being able to defer its equity contribution until after debt is fully drawn and construction risk has already passed.
How does the drawdown schedule affect interest during construction?
IDC is calculated on the cumulative drawn debt balance in each period. A drawdown profile that draws debt earlier or in larger proportion produces a higher IDC cost than one that draws debt later or pro-rata with equity, for the same total debt quantum.
What is the difference between a drawdown schedule and a construction cost curve?
The construction cost curve shows when costs are actually incurred by the contractor. The drawdown schedule shows when funding is drawn to pay those costs, which may lag the cost curve by a payment processing period but should otherwise track it closely.
What happens if the drawdown schedule does not match the actual construction programme?
The model will misstate the timing of debt drawn and therefore the interest during construction calculation, and may show a funding shortfall or surplus in a given period that does not reflect the project's actual cash position.
Related Articles
Sources and Uses (of Funds)
A sources and uses statement is the schedule in a project finance model that lists every source of funding for a transaction, senior debt, subordinated debt, sponsor equity, grants, and any other funding instrument, against every use of that funding, construction costs, capitalized interest during construction, reserve account funding, financing fees, and contingency. The two sides must reconcile to the same total with no unexplained balancing figure. It is typically the first schedule built in a project finance model and the one lenders review first, because it is the clearest single statement of how a transaction is actually funded and what that funding is spent on.
Interest During Construction (IDC)
Interest during construction (IDC), also called capitalized interest, is the interest that accrues on project finance debt drawn during the construction phase, before the project reaches commercial operations and begins generating revenue to service that debt. Because there is no operating cash flow available to pay this interest as it accrues, IDC is typically capitalized, added to the total funding requirement and financed as part of the debt facility, rather than paid in cash during construction. IDC is calculated on the cumulative drawn balance, which itself depends on the total funding requirement, creating a circular reference that is one of the most common structural features of a project finance construction-phase model.
Drawdown and Funding Mechanics
The drawdown schedule translates the total funding requirement from the sources and uses statement into a period-by-period draw of debt and equity during construction, governed by a funding competition rule that determines the relative proportion of debt versus equity drawn each period. This guide sets out how to build pro-rata, equity-first, and debt-first funding competition mechanics, how to sequence multi-tranche debt drawdowns, and how standby facilities interact with the base drawdown schedule.
Construction Contingency
Construction contingency is an amount of funding reserved in a project finance sources and uses statement specifically to absorb cost overruns during the construction phase, distinct from and additional to the base construction budget. Because a project finance lender's exposure is fixed at financial close while the construction contract's final cost is not fully certain until completion, contingency sizing and its drawdown mechanics, including who bears responsibility for funding a shortfall once contingency is exhausted, is one of the most heavily negotiated points in project finance structuring.