Refinancing Model
Executive Summary
Key Takeaways
- ✓ A refinancing model analyses the replacement of existing debt with new debt on revised terms.
- ✓ It combines historical actuals (pre-refinancing) with forward projections (post-refinancing) in a single model.
- ✓ The transition point — where old debt is repaid and new debt is drawn — is the most error-prone section.
- ✓ Post-refinancing DSCR must be calculated using the new debt service profile, not the old one.
- ✓ Break costs, fees, and tail ratio must be correctly reflected.
- ✓ Equity IRR enhancement is the primary return metric for equity investors evaluating a refinancing.
Definition¶
A refinancing model is a financial model built to analyse the economics of replacing existing debt with new debt under revised terms. In a project finance or infrastructure context, a refinancing replaces the original construction-phase or early-operational-phase debt with new debt that reflects the reduced risk profile of an operating asset — typically at a lower margin, a longer tenor, or a higher principal amount, or some combination of these.
A refinancing model runs the project's financial projections under the proposed new debt terms, calculates the revised DSCR, LLCR, and equity returns, and compares these against the original financing to quantify the benefit of the refinancing.
Why It Matters¶
Refinancing is one of the most significant value-creation opportunities available to equity investors in infrastructure and project finance. Once a project moves from construction risk to operational risk, its credit profile typically improves materially, allowing it to access cheaper or larger debt. The refinancing model is the tool through which this value is quantified and the new debt terms are structured.
For lenders considering refinancing a project they already hold, the refinancing model is the basis for credit approval. For equity investors proposing to refinance, it demonstrates the financial benefit and tests whether the new debt structure maintains adequate covenant headroom.
In a model audit context, refinancing models require attention because they incorporate the history of the existing financing (actual cash flows and debt balances to the refinancing date) alongside the new forward-looking debt structure — a combination that is prone to modelling errors at the transition point.
Technical Background¶
Why Projects Are Refinanced¶
Infrastructure and project finance assets are refinanced for several reasons:
| Motivation | Description |
|---|---|
| Margin reduction | Operational projects have lower risk profiles than construction projects, allowing cheaper debt |
| Tenor extension | Longer-term operational debt matches the asset's cash flow profile better than shorter construction debt |
| Debt upsizing | Stronger-than-expected performance allows more debt to be raised than was available at financial close |
| Lender change | Replacement of short-term or bilateral debt with capital markets instruments or a new bank group |
| Interest rate optimisation | Fixing floating rate debt or refinancing fixed rate debt when market rates fall |
| Covenant restructuring | Relaxation of restrictive covenants that are no longer appropriate for the asset's operational risk profile |
Structure of a Refinancing Model¶
A refinancing model is an extension of the original project finance model. Its structure includes:
1. Pre-refinancing actuals (historical section) The section from financial close to the refinancing date, populated with actual (not projected) cash flows, actual debt drawdowns and repayments, and the actual debt balance as at the refinancing date. This section should reconcile to the project company's audited accounts and the lender's debt records.
2. Refinancing mechanics The point in the model where the existing debt is repaid and the new debt is drawn. Key mechanics to model:
- Prepayment premium or break cost on the existing debt
- Arrangement fees and upfront costs on the new debt
- Timing of the two transactions (simultaneous or sequential)
- Net cash surplus or deficit from the refinancing (which affects the equity cash flow)
3. Post-refinancing projections (forward-looking section) The remainder of the model from the refinancing date, using the new debt terms. The forward-looking section should be built using the same cash flow projections as the original model (with any updates for actual performance to date), reflecting only the changed financing terms.
4. Equity distribution Where the refinancing generates a cash surplus (because new debt raised exceeds old debt repaid and transaction costs), this surplus is typically distributed to equity investors. The model should calculate the timing and amount of this distribution.
5. Returns comparison A side-by-side comparison of equity IRR and DSCR under the original financing and the proposed refinancing, demonstrating the financial benefit to equity and confirming that the new lenders have adequate covenant headroom.
DSCR at Refinancing¶
The primary credit test for the new lenders is whether the post-refinancing DSCR meets their covenant requirements. The refinancing model must calculate DSCR using:
- The new debt service profile (principal plus interest under the new terms)
- Cash flows from the forward-looking operational projections
- Any revised reserve account requirements under the new financing
A common error is to calculate the post-refinancing DSCR using the old debt service profile — which will show artificially high coverage because the old debt had different terms.
Tail Ratio at Refinancing¶
The tail ratio — the ratio of the remaining project or concession life beyond the new debt maturity to the new debt tenor — is a key metric for the new lenders. They want to ensure that there is adequate project life remaining after the debt is repaid to provide a recovery buffer. A refinancing that extends the debt tenor to the point where the tail is insufficient will be rejected by lenders.
Equity IRR Enhancement¶
The equity IRR enhancement from a refinancing is calculated as:
Incremental equity IRR = XIRR(Refinancing case equity cash flows) - XIRR(Original case equity cash flows)
The refinancing case equity cash flows include: - All equity cash flows from financial close to refinancing date (the same as the original case) - The cash distribution from the refinancing surplus (the incremental benefit) - All post-refinancing equity distributions (which may be higher than the original case due to lower debt service)
Break Costs and Transaction Costs¶
Where the existing debt is at a fixed interest rate, refinancing may trigger a breakage cost — the present value of the lender's expected future interest income foregone. This cost must be included in the refinancing model. A model that omits break costs will overstate the benefit of the refinancing.
Note: Break cost calculation methodologies vary depending on the terms of the existing debt documentation. Practitioners should refer to the break cost provisions in the relevant loan agreement.
Audit Considerations¶
1. Historical Section Accuracy¶
The pre-refinancing historical section must reconcile to the project company's financial records. An auditor should confirm that:
- The opening debt balance at financial close matches the original model
- Actual drawdowns and repayments are correctly reflected
- The debt balance as at the refinancing date matches the lender's loan account statement
2. Transition Point Mechanics¶
The transition from the historical to the forward-looking section is the most error-prone part of a refinancing model. Verify:
- Old debt is fully repaid at the correct point
- New debt is drawn at the correct amount
- Break costs and fees are correctly included
- The net equity distribution from the refinancing is correctly calculated
3. Post-Refinancing DSCR Formula¶
Confirm that the DSCR in the post-refinancing section uses the new debt service profile, not the old one. A model where the DSCR formula references the old debt service row will produce incorrect covenant compliance outputs for the new lenders.
4. Tail Ratio¶
Calculate the tail ratio under the new debt terms and confirm it meets the new lenders' requirements. An extension of the debt tenor that produces an inadequate tail will not be acceptable to lenders.
5. Equity Cash Flow Series¶
Verify that the equity IRR calculation correctly includes the refinancing cash distribution in the correct period. A distribution that is modelled one period too early or too late will affect the equity IRR calculation due to time-value sensitivity.
6. Break Cost Inclusion¶
Confirm that break costs on the existing fixed-rate debt are included in the model and correctly calculated per the existing loan agreement.
Common Errors¶
| Error | Description | Risk |
|---|---|---|
| Incorrect opening debt balance | Historical debt balance does not match loan account records | All forward projections start from wrong position |
| Old debt service in new DSCR | Post-refinancing DSCR uses old debt service profile | New lenders receive wrong coverage calculation |
| Break costs omitted | No break cost for fixed rate debt refinancing | Refinancing benefit overstated |
| Tail ratio not checked | Post-refinancing tail insufficient for new lenders | New debt terms are not achievable |
| Distribution timing error | Equity distribution from refinancing in wrong period | Equity IRR calculation is incorrect |
| Fee omissions | Arrangement fees, legal fees, or other transaction costs omitted | Net benefit of refinancing overstated |
Continue Reading¶
Prerequisites¶
- What Is a Project Finance Model Audit? — the parent pillar
Related Glossary¶
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Frequently Asked Questions
When does a project typically refinance?
Refinancing opportunities typically arise when a project has been operating for 2 to 5 years and has demonstrated stable cash flow performance, reducing lenders' perceived risk and enabling cheaper debt terms. The optimal timing depends on the debt market conditions, the project's performance track record, and the break cost on existing fixed-rate debt.
Does refinancing require a new model audit?
In most cases, yes. New lenders will require an independent review of the refinancing model as a condition to providing the new debt. The original model audit certificate covers only the original financing and cannot be relied upon for the refinancing. The scope of the new audit should include the accuracy of the historical section and the post-refinancing DSCR mechanics.
What is a refinancing gain?
The refinancing gain is the economic benefit of the refinancing expressed as an uplift in equity IRR or as the present value of the reduction in financing costs. It is calculated by comparing the equity cash flows in the original financing case against the equity cash flows in the refinancing case.
Can a project refinance if it has missed a covenant?
A covenant breach does not automatically prevent refinancing, but it complicates it. Lenders considering refinancing a project that has experienced covenant issues will want to understand the cause, the remediation steps taken, and whether the projected performance under the new financing is credible. A model that does not address historical covenant issues will not be credible with new lenders.
Related Articles
Project Finance Model
A project finance model is a financial model built to analyse the economics of a capital project that is financed on a non-recourse or limited-recourse basis. In a non-recourse structure, lenders rely solely on the cash flows generated by the project — and the security over the project's assets — for repayment of the debt. They have no recourse to the equity sponsors' wider balance sheets. The project finance model is the primary analytical tool through which all parties — sponsors, lenders, advisers, and government agencies — evaluate the project's financial viability, structure the debt, negotiate terms, and, after financial close, monitor the project's ongoing financial performance.
LLCR (Loan Life Coverage Ratio)
The Loan Life Coverage Ratio (LLCR) is a project finance metric that measures the ratio of the net present value (NPV) of all projected cash available for debt service (CADS) over the remaining loan life to the current outstanding debt balance. It is a forward-looking coverage ratio that tests whether the project has sufficient projected cash generation to repay all outstanding debt. The LLCR formula is: LLCR is expressed as a ratio: an LLCR of 1.25x means that the NPV of projected cash available for debt service is 1.25 times the outstanding debt balance.
Equity IRR
Equity IRR (Equity Internal Rate of Return) is the discount rate at which the net present value of all equity cash flows — comprising the initial equity investment as a negative cash flow and subsequent distributions and terminal proceeds as positive cash flows — equals zero. It measures the annualised return earned by equity investors on capital contributed to a project or transaction, calculated on post-debt-service cash flows only. Equity IRR is distinct from Project IRR, which is calculated on total project cash flows before financing. Equity IRR is always higher than Project IRR in a positively leveraged transaction because debt amplifies equity returns. It is lower than Project IRR when leverage is negative — that is, when the cost of debt exceeds the unlevered return of the project.
Debt Sculpting
Debt sculpting is the project finance modelling technique by which the periodic loan repayment schedule is derived from the project's projected cash flows available for debt service, sized in each period to maintain a minimum debt service coverage ratio (DSCR). Rather than specifying equal principal repayments or equal total debt service payments over the loan life, debt sculpting produces a repayment profile whose shape mirrors the project's cash flow curve: larger repayments in periods of high cash generation, smaller repayments in periods of lower cash flow. The result is a higher achievable debt quantum than flat or annuity amortisation while maintaining covenant compliance throughout the loan life.
Cash Waterfall
A cash waterfall is the contractually defined priority sequence in which cash generated by a project is allocated to successive payment obligations. In a project finance structure, the cash waterfall determines the order in which operating costs, debt service (interest and principal), reserve contributions, and equity distributions are paid from the project's revenue. Senior obligations are paid first; junior obligations and distributions are paid only after senior obligations are fully satisfied. The DSCR and other coverage covenants are calculated at specific points within the waterfall to determine whether cash can flow to the next level.
Tail Ratio
The tail ratio in project finance is the ratio of the project's remaining economic life (or remaining concession period) after the scheduled debt maturity date to the total loan tenor. It quantifies how much project life — and therefore cash-generating potential — remains after the debt has been fully repaid. The tail ratio is commonly expressed as: A tail ratio of 0.20x (or 20%) on a 20-year loan means the project has 4 years of additional life after the debt is repaid. A tail ratio of 0x means the project ends exactly at debt maturity with no buffer. Some lenders and practitioners define the tail in absolute terms (number of years of remaining project life after debt maturity) rather than as a ratio.