cre-excel-dcf-modeler

name	cre-excel-dcf-modeler
description	Build discounted cash flow (DCF) valuation models in Excel specifically for commercial real estate (CRE). Use when creating CRE acquisition underwriting models, property-level DCF workbooks, NOI projections, rent roll buildouts, debt schedules, or IRR/equity-multiple return analyses in Excel or ExcelJS. Covers all CRE property types: office, retail, industrial, multifamily, mixed-use, hotel. Trigger on: 'CRE excel model', 'build underwriting model', 'property DCF excel', 'NOI projection spreadsheet', 'rent roll model', 'IRR excel', 'acquisition model', 'CRE waterfall', 'cap rate model'.
allowed-tools	Read, Write, Edit, Grep, Glob, Bash(cmd:*)

CRE Excel DCF Modeler

Builds institutional-grade CRE acquisition underwriting workbooks following investment manager / ARGUS conventions. CRE Excel models are structurally different from corporate DCF: they use NOI-based cash flows, direct capitalization exit, loan amortization schedules, and CRE-specific return metrics (IRR, equity multiple, cash-on-cash, DSCR, debt yield).

Prerequisites

• Excel, Google Sheets, or ExcelJS (for programmatic creation via this project's exceljs library)
• Property information: type, size, purchase price
• Rent roll or revenue assumptions
• Operating expense data or ratios
• Financing terms (LTV, rate, IO, amortization)

Sheet Structure (7 tabs, in order)

Tab	Name	Purpose
1	Cover	Deal summary, key metrics dashboard
2	Assumptions	All user inputs (blue cells)
3	Rent Roll	Tenant-level revenue model (or Unit Mix for MF)
4	Operating Statement	EGI → NOI waterfall by year
5	Debt Schedule	Amortization table, balance, DSCR, debt yield
6	Cash Flows & Returns	CFBDS, CFADS, IRR, EM, CoC
7	Sensitivity	IRR/EM sensitivity tables (2-variable)

See references/cre-model-structure.md for full sheet layouts.

Instructions

1. Assumptions Sheet (Tab 2) — User Inputs Only

Color-code convention: blue = user input, black = formula, green = cross-sheet reference.

Property Information
├── Property Name / Address
├── Property Type  (Office / Retail / Industrial / MF / Mixed-Use / Hotel)
├── GLA (SF) or Unit Count
└── Year Built

Acquisition
├── Purchase Price
├── Acquisition Closing Costs %      (default: 1.5%)
├── Upfront CapEx / TI Reserve       ($)

Revenue Assumptions
├── Market Rent ($/SF/yr or $/unit/month)
├── Annual Rent Growth Rate          (% — applied to market rent each year)
├── Vacancy & Credit Loss %          (% of PGI)
├── Other Income                     ($ or $/unit/yr)

Operating Expenses
├── Real Estate Taxes                ($ or $/SF/yr)
├── Insurance                        ($ or $/SF/yr)
├── Utilities (CAM)                  ($ or $/SF/yr)
├── Repairs & Maintenance            ($ or $/SF/yr)
├── Management Fee %                 (% of EGI)
├── Administrative                   ($ or $/SF/yr)
├── CapEx Reserve                    ($/SF/yr or $/unit/yr)

Financing
├── Loan-to-Value (LTV) %
├── Interest Rate %
├── Interest-Only Period (years)
├── Amortization Period (years)
├── DSCR Minimum                     (default: 1.25x)
├── Debt Yield Minimum               (default: 8%)

Hold Period & Exit
├── Hold Period (years)
├── Exit Cap Rate %                  (convention: going-in + 25–50 bps)
├── Selling Costs %                  (default: 1.25%)

Critical: Every projection cell must link back to Assumptions. Never hardcode a value in the projection sheets.

2. Rent Roll Sheet (Tab 3)

For office/retail/industrial (multi-tenant):

Columns: Tenant | Suite | Leased SF | Lease Start | Lease End | Rent/SF/Yr | Annual Rent | Lease Type | Escalation | Market Rent/SF

• Row per tenant
• Totals row: Total Leased SF, Total Annual Rent
• Vacant row: Vacant SF at market rent
• GPR summary: in-place rent + vacant at market rent

For multifamily (unit mix):

Columns: Unit Type | # Units | Unit Size SF | Current Rent/Mo | Market Rent/Mo | Annual Revenue

• Row per unit type (Studio, 1BR, 2BR, etc.)
• Physical vacancy applied via assumption

For NNN leases: add Expense Recovery column.

3. Operating Statement Sheet (Tab 4)

Build the NOI waterfall by year (Y0 through Yn):

               | Y1      | Y2      | ... | Yn
Gross Potential Rent     ← from Rent Roll × (1+growth)^yr
+ Expense Recoveries     ← NNN tenants (if applicable)
+ Other Income           ← from Assumptions
= PGI
- Vacancy & Credit Loss  ← PGI × vacancy %
= EGI
- Real Estate Taxes      ← grown by expense inflation rate
- Insurance
- Utilities
- Repairs & Maintenance
- Management Fee         ← % × EGI
- Administrative
= NOI
- CapEx Reserve          ← $/SF × SF or $/unit × units
- Tenant Improvements    ← from rollover schedule
- Leasing Commissions    ← from rollover schedule
= CFBDS (Cash Flow Before Debt Service)

Apply rent growth to GPR each year: =GPR_Y1 × (1 + RentGrowth)^(year-1) Apply expense growth (typically 2–3%) to all fixed-cost line items.

4. Debt Schedule Sheet (Tab 5)

One row per year:

| Year | Beginning Balance | Annual Debt Service | Interest Paid | Principal Paid | Ending Balance | DSCR | Debt Yield |

Key formulas (see references/cre-excel-formulas.md for Excel syntax):

• IO years: Debt Service = Loan × Rate; balance unchanged
• Amortizing years: Debt Service = PMT(Rate/12, AmortYrs×12, Loan) × 12
• DSCR = NOI / Debt Service (flag if < DSCR_Min with conditional formatting)
• Debt Yield = NOI / Beginning Balance

5. Cash Flows & Returns Sheet (Tab 6)

Year 0 — Equity Investment:
  Total Cost = Purchase Price + Closing Costs + Upfront Reserves
  Equity     = Total Cost − Loan Amount

Years 1–n:
  CFBDS  (from Operating Statement)
  − Debt Service (from Debt Schedule)
  = CFADS

Year n — Exit Reversion:
  Exit NOI (forward) = Year n NOI × (1 + RentGrowth)
  Gross Exit Value   = Exit NOI / Exit Cap Rate
  Net Exit Value     = Gross Exit Value × (1 − Selling Costs)
  Remaining Balance  = Ending Balance from Debt Schedule Year n
  Net Equity Proceeds = Net Exit Value − Remaining Balance

Return Calculations:
  Unlevered IRR  = IRR({−TotalCost, CFBDS_Y1, ..., CFBDS_Yn + NetExitValue})
  Levered IRR    = IRR({−Equity, CFADS_Y1, ..., CFADS_Yn + NetEquityProceeds})
  Equity Multiple = (Σ CFADS + Net Equity Proceeds) / Equity
  Year 1 CoC    = CFADS_Y1 / Equity
  Going-in Cap  = NOI_Y1 / Purchase Price

6. Sensitivity Sheet (Tab 7)

Build two standard 2-variable tables:

Table 1 — Levered IRR by Exit Cap Rate × Rent Growth

• Rows: Exit Cap Rate (going-in ± 100 bps in 25 bps increments)
• Columns: Rent Growth (0% to 5% in 1% increments)
• Corner cell: =Returns!LeveredIRR
• Use Excel Data Table (Data → What-If → Data Table)

Table 2 — DSCR by Interest Rate × LTV

• Rows: Interest Rate (base ± 150 bps in 50 bps increments)
• Columns: LTV (55% to 75% in 5% increments)
• Corner cell: =DebtSchedule!DSCR_Y1 (first amortizing year DSCR — the binding lender test; use a named range defined on the debt schedule sheet)

Apply conditional formatting:

• IRR table: green ≥ target IRR, yellow = within 200 bps, red < target
• DSCR table: green ≥ 1.25x, yellow 1.10–1.25x, red < 1.10x

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Error Handling

Error	Cause	Correct Approach
#DIV/0! in DSCR	Zero debt service (no loan)	Wrap: =IF(DS=0, "N/A", NOI/DS)
#DIV/0! in cap rate	Zero purchase price	Wrap: =IF(PP=0, "N/A", NOI/PP)
Negative equity	LTV > 100% or typo	Validate LTV < 100%; add check cell
IRR not converging	All same-sign CFs	Verify Year 0 is negative (equity outflow)
Exit cap < going-in cap	Model assumption error	Flag with conditional format; warn user
DSCR < 1.00	Debt service exceeds NOI	Flag red; model may not be financeable
Loan > Debt Yield min	DY = NOI/Loan < floor	Flag; lender will cut loan proceed
Terminal growth ≥ discount rate	Gordon Growth break	Not applicable to CRE (uses cap rate exit)

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Formatting Standards

• Blue fill + white text: All user input cells (Assumptions tab)
• No fill: Formula cells
• Green text: Cross-sheet references
• Bold + gray background: Section headers and totals
• Red text / red fill: Negative cash flows, DSCR breaches
• Borders: Around each major section (NOI summary, returns summary)
• Number formats: $1,234,567 for dollar amounts; 0.0% for percentages; 0.00x for multiples

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Validation Checklist

Before delivering the model:

• Sources = Uses: Loan + Equity = Purchase Price + Closing Costs + Reserves
• Going-in cap rate matches seller's stated cap (cross-check NOI ÷ PP)
• DSCR ≥ 1.25x in every year — check first amortizing year (not just IO period)
• Debt Yield ≥ 8% at origination using original loan amount (not current balance)
• Loan amount = MIN(LTV × PP, NOI_Y1 / DY_min) — DY constraint may cut proceeds below LTV
• Exit cap ≥ going-in cap (warning if compressed; document value-add rationale)
• Exit NOI is forward NOI (Year n+1), NOT Year n NOI
• IO period debt service = Loan × Rate only (no principal)
• Amortizing period PMT uses original loan amount, not remaining balance
• All projection cells link to Assumptions (no hardcoded values)
• Unlevered IRR > going-in cap rate (sanity: unlevered return must beat cap rate)
• Avg CoC range uses operating CFADS only (exclude exit year reversion)
• Sensitivity tables use DATA TABLE (Excel) or programmatic loop (ExcelJS) — not hardcoded values

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Examples

Example 1 — Multifamily Acquisition Request: "Build a 5-year DCF model for a 120-unit apartment building at $15M, 5.5% cap rate, 70% LTV, 5% interest, 2-year IO, DSCR 1.25x" Result: 7-tab workbook with unit mix, stabilized NOI waterfall, debt schedule, levered IRR ~14%, EM 1.85x, sensitivity tables

Example 2 — Industrial NNN Acquisition Request: "Model a 250,000 SF industrial building at $20M, in-place NNN lease at $6.50/SF, 7-year term, 3% annual bumps, exit at 5.25% cap" Result: Rent roll with single tenant, NNN expense recoveries, minimal landlord OpEx, 7-tab model with IRR bridge analysis

Example 3 — Value-Add Office Request: "Underwrite a 60,000 SF office at $8M, 55% occupied, lease-up over 3 years to 90%, $50/SF TI, 5% LC, 6.5% exit cap" Result: Multi-tenant rent roll with vacancy burn-off, TI/LC schedule, stabilized and as-is NOI projection, levered IRR 16%

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Resources

• references/cre-excel-formulas.md — All CRE-specific Excel formula templates
• references/cre-model-structure.md — Detailed cell-by-cell layout for each sheet
• cre-dcf-valuation skill — CRE DCF methodology and property-type benchmarks