Modeling Construction Period Risk

When To Use

• Modeling construction-phase cash flows and risk exposure for infrastructure or energy projects
• Evaluating EPC/turnkey contract terms for bankability and risk allocation
• Stress-testing project timelines against delay and cost overrun scenarios
• Assessing completion guarantee structures (parent guarantees, surety bonds, LC-backed facilities)
• Underwriting construction-period debt sizing and draw schedules
• Reviewing PPP/concession projects where construction risk drives financial close conditions

Inputs To Gather

• EPC contract — fixed-price vs. cost-plus structure, GMP caps, scope of work, change order provisions, LD schedule (delay LDs and performance LDs), force majeure definition, termination triggers
• Construction budget — total EPC price, owner's costs, development fees, contingency allocation (typically 5-15% for greenfield), IDC assumptions
• Construction schedule — milestone timeline, critical path items, long-lead equipment delivery dates, commissioning/testing period, target COD
• Funding plan — equity/debt split, draw schedule, construction facility terms (commitment fees, margin during construction), equity contribution agreement timing
• Contractor profile — EPC contractor credit rating, track record on comparable projects, bonding capacity, subcontractor reliance
• Insurance program — builder's risk, delay-in-startup (DSU/ALOP) coverage, deductibles, sub-limits
• Site/permitting status — land acquisition status, environmental permits, interconnection agreements, offtake contract conditions precedent [VERIFY: jurisdiction-specific permitting requirements]

Workflow

1. Map the EPC risk allocation — Extract key risk provisions from the EPC contract: price structure (lump-sum turnkey vs. open-book), LD caps (typical range: 15-20% of contract price for aggregate LDs), warranty scope, defect liability period, and carve-outs from contractor liability (force majeure, owner-caused delays, change-in-law)

2. Build the construction cost model — Structure total project cost as: EPC price + owner's costs + development fees + financing costs (IDC + fees) + contingency. Model contingency drawdown assumptions. Separate hard costs from soft costs. Flag any cost items outside the EPC wrap [VERIFY: treatment of sales tax/VAT on construction costs by jurisdiction]

3. Model the draw schedule — Create monthly or quarterly construction draw curves. Standard S-curve or milestone-based draws tied to EPC payment schedule. Layer in equity-first vs. pro-rata vs. debt-first contribution mechanics. Calculate IDC based on drawn balances and construction facility pricing

4. Run delay scenarios — Model 3-6-12 month delay cases:

   • Revenue impact: lost operating cash flow during delay period
   • Cost impact: additional IDC, extended owner's costs, standby charges
   • LD recovery: delay LD accrual ($/day) capped at contract maximum
   • Funding gap: does contingency cover the shortfall? Is there a cost overrun facility?
   • Debt service: impact on first principal payment date, tail ratios, sculpted repayment profile

5. Run cost overrun scenarios — Model 10-20-30% cost overrun cases:

   • Within EPC wrap: contractor absorbs (verify LD and liability caps)
   • Outside EPC wrap: owner's cost escalation, scope changes, unforeseen conditions
   • Funding response: contingency drawdown → cost overrun facility → equity cure → lender step-in rights
   • Assess whether completion guarantee or sponsor support agreement covers the gap

6. Evaluate completion guarantee structures — Assess the enforceability and credit backing of:

   • Sponsor completion guarantees (cost and date certain)
   • Surety bonds / performance bonds (typically 10-30% of EPC price)
   • Standby letters of credit
   • Contingent equity commitments
   • DSU insurance as partial backstop for delay risk

7. Stress-test debt metrics during construction — Calculate construction-period covenant compliance: maximum loan-to-cost ratio, minimum equity contribution percentage, conditions precedent to each draw (independent engineer certification, budget-to-complete test). Model whether delay/overrun scenarios trigger draw-stop events or covenant breaches

Output

• Construction risk matrix — tabular mapping of risk category → contractual allocation → residual exposure → mitigation mechanism
• Base case construction budget and draw schedule — monthly/quarterly with IDC, contingency, and funding source breakdown
• Delay scenario dashboard — 3/6/12-month delay impact on total cost, funding gap, LD recovery, and debt metrics
• Cost overrun waterfall — sequential funding response (contingency → overrun facility → equity cure → guarantee call) with breakpoints
• Completion guarantee assessment — credit quality of guarantor, cap adequacy, trigger conditions, gap analysis
• Key risk flags — items requiring lender/investor attention (uncapped risks, thin contingency, weak contractor credit, permit gaps)

Quality Checks

• Verify EPC LD caps are correctly applied as % of contract price — not total project cost
• Confirm IDC calculation uses actual draw schedule timing, not a flat average
• Check that contingency is sized relative to identified risks, not just a blanket percentage
• Ensure delay scenarios capture cascading effects (IDC + lost revenue + extended owner's costs simultaneously)
• Validate that completion guarantee coverage matches or exceeds modeled worst-case funding gap
• Cross-check construction facility commitment amount against peak draw requirement plus headroom
• Confirm all cost and schedule assumptions are sourced (independent engineer report, EPC contract, or sponsor estimate) — mark unsourced items with [VERIFY]
• Flag any scenario where the project cannot reach financial completion under stress without additional uncommitted support