This Digital Twin utilizes the Discounted Cash Flow (DCF) method, the industry standard for commercial real estate valuation. It projects future cash flows over a 10-year holding period and discounts them back to present value.
The model strictly follows a "Debt-First" repayment hierarchy:
- Gross Income: Calculated as
Leasable Area (90k sqm) * Rent * (1 - Vacancy). - Net Operating Income (NOI): Gross Income minus Operating Expenses (OpEx).
- Debt Service: The Bank is paid first. We calculate an annual mortgage payment based on a 20-year amortization schedule.
- Equity Cash Flow: The remaining cash (if any) is distributed to the Investor (WestProp).
Formula:
Equity CF = NOI - Annual Debt Service
- Inflation (Escalation): Rents represent nominal figures and increase by 3.0% per annum (compounding).
- Exit Cap Rate: 8.0%. This assumes the mall is sold at the end of Year 10 based on Year 11's projected NOI.
- Amortization: Loan payments are calculated based on a 20-year profile, even though the project is exited in Year 10. This mimics standard commercial mortgage terms.
- Refinancing/Exit: At the end of Year 10, the outstanding principal is paid off using the proceeds from the sale of the mall.
The Risk Heatmap performs a Two-Variable Sensitivity Test:
- X-Axis: Construction Cost (Capex Risk)
- Y-Axis: Rental Rate (Market Risk)
- Green Zone: IRR > 15% (Target met)
- Red Zone: IRR < 10% (Capital at risk)
- Equity IRR (Internal Rate of Return): The annualized compounded return rate on the specific cash invested by shareholders.
- Equity Multiple: The total cash returned divided by the total cash invested. (e.g., 2.0x means you doubled your money).
- Breakeven Point: The exact year where the cumulative net cash flow turns positive (Payback Period).
- Taxation: The model calculates Pre-Tax returns. ZIMRA Corporate Tax (24.72%) and VAT are excluded for strategic clarity.
- Construction Drawdown: Interest During Construction (IDC) is modeled simply as part of the total funding requirement, rather than an S-Curve monthly drawdown.