Lesson 06 · 12 min read

Development Pro Forma and Feasibility Math

How to build a development pro forma — hard costs, soft costs, financing costs, contingency, revenues, returns, and the sensitivity analysis that determines go/no-go.

The development pro forma is the financial model that determines whether a project should be pursued. It tracks every dollar in (capital sources) and every dollar out (project costs and operating expenses), through the development period and into stabilized operations. A well-built pro forma drives go/no-go decisions, secures financing, manages execution, and validates returns at exit. A bad pro forma — wishful, incomplete, or wrong — is one of the leading causes of failed developments.

This lesson covers how to build a development pro forma, what to include, how to test assumptions, and how to use the model to drive better decisions.

Pro forma structure

A development pro forma has several major sections.

1. Sources and uses

The capital structure of the project:

Uses (where the money goes):

  • Land cost
  • Hard costs (construction)
  • Soft costs (design, fees, financing)
  • Financing costs (interest, fees)
  • Contingency
  • Total project cost

Sources (where the money comes from):

  • Equity (owner, partners, syndication)
  • Debt (construction loan, mezz, preferred equity)
  • Total sources

Sources must equal uses.

2. Development budget

Detailed breakdown of all project costs by category and subcategory.

3. Construction draw schedule

Timing of when construction costs are incurred and when loan draws fund them.

4. Operating pro forma

Projected operating performance after stabilization:

  • Income
  • Expenses
  • NOI

5. Cash flow analysis

Quarterly or annual cash flows over the development and hold period:

  • Equity contributions (negative)
  • Loan draws (offsetting construction spend)
  • Operating cash flow
  • Sale or refinance proceeds
  • Equity distributions

6. Returns analysis

The metrics that determine project viability:

  • Yield on cost
  • Stabilized value
  • Development profit
  • IRR
  • Equity multiple
  • Cash-on-cash

7. Sensitivity analysis

Stress testing of key assumptions.

Building the development budget

The development budget is the foundation of the pro forma.

Land cost

Direct costs of acquiring the land:

  • Purchase price
  • Closing costs (title, escrow, recording)
  • Legal fees for closing
  • Brokerage fees (sometimes paid by buyer)
  • Survey, title insurance, environmental (if part of acquisition)
  • Property taxes at closing
  • Carrying costs during pre-construction

Total land cost is typically 15-25% of total project cost.

Hard costs

Hard costs are the direct costs of construction.

Major hard cost categories:

  • Site work and grading
  • Underground utilities
  • Foundation and slab
  • Structural steel or concrete
  • Exterior walls and windows
  • Roofing
  • Interior framing and drywall
  • MEP systems (mechanical, electrical, plumbing)
  • Fire protection
  • Interior finishes (flooring, paint, ceilings)
  • Specialty items (elevators, equipment)
  • Site improvements (paving, landscape, lighting)
  • Tenant improvements (for known tenants)
  • General conditions (contractor overhead)
  • Contractor fee/profit

Hard cost benchmarks (Florida 2025 estimates):

  • Strip retail: $200-$280/SF
  • Anchored retail: $180-$240/SF
  • Single-tenant retail (NNN): $180-$280/SF
  • Bulk distribution warehouse: $80-$130/SF
  • Light industrial / flex: $120-$180/SF
  • Class A office: $250-$400/SF
  • Medical office: $300-$450/SF
  • Multifamily garden: $180-$260/SF
  • Multifamily mid-rise: $250-$400/SF
  • Self-storage: $50-$130/SF
  • Car wash tunnel: $700-$1,400/SF (small footprint, equipment heavy)

These are rough ranges that vary by market, design, materials, and timing.

Soft costs

Soft costs are non-construction project costs:

Design fees:

  • Architectural
  • Civil engineering
  • Structural engineering
  • MEP engineering
  • Landscape architecture
  • Interior design
  • Specialty consultants

Other soft costs:

  • Legal fees (entitlements, contracts, leasing)
  • Surveys (boundary, ALTA, topographic)
  • Geotechnical investigation
  • Environmental Phase I/II
  • Traffic studies
  • Market studies
  • Permits and impact fees
  • Tap fees (water, sewer)
  • Insurance during construction (builder's risk, GL)
  • Property taxes during construction
  • Title insurance
  • Lender fees (origination, processing, loan closing)
  • Inspection fees (lender, owner)
  • Marketing and leasing commissions
  • Tenant improvement allowances (for tenants you pay for)
  • Free rent / concessions (capitalized)
  • Pre-opening expenses
  • Developer fee (if applicable)
  • Property management during lease-up
  • Reserves
  • Working capital

Soft cost benchmarks:

  • Soft costs are typically 15-25% of hard costs
  • Larger projects have lower soft cost percentages
  • Complex projects have higher soft cost percentages

Financing costs

Interest reserves:

  • Calculated on average outstanding loan balance × rate × duration
  • Capitalized into the loan
  • Typically 3-8% of total project cost

Loan fees:

  • Origination (1-2% of loan amount typical)
  • Lender legal
  • Appraisal
  • Inspection fees (during construction)
  • Recording fees

Contingency

Contingency is essential. Two types:

Hard cost contingency:

  • 5-15% of hard costs
  • 10% standard for typical projects
  • 15% for complex or speculative projects

Soft cost contingency:

  • 5-10% of soft costs
  • Sometimes combined with hard cost contingency

Total contingency: typically 8-12% of total project cost

Total project cost

Sum of all categories above.

Construction draw schedule

Construction costs aren't all incurred at the start. They're spread over the construction period:

Typical S-curve:

  • Months 1-3: 10-20% of construction (mobilization, site work, foundation)
  • Months 4-7: 50-70% of construction (vertical construction, MEP)
  • Months 8-11: 15-30% of construction (finishes, closeout)
  • Months 11-12: 5-10% of construction (punch list, retainage release)

This timing affects:

  • Interest reserves (more debt outstanding longer)
  • Equity timing (when owner equity is needed)
  • Cash flow projections

Sources of capital

Development capital comes from multiple sources.

Equity

Sponsor equity:

  • Developer's own capital
  • Aligned interests
  • Typically 10-30% of total equity

Limited partner equity:

  • Passive investors
  • Through syndication or fund
  • Typically 70-90% of total equity

Equity terms:

  • Preferred return (typically 6-9% pref)
  • Promote / carried interest (often 20-30% above pref)
  • Catch-up provisions
  • Refinance and sale distributions

Construction debt

Construction loan:

  • 60-75% LTC (loan-to-cost) typical
  • Floating rate (SOFR + 250-450 bps typical)
  • Term: 18-36 months
  • Interest only during construction
  • Balloon at completion (refinance or sale)

Loan draws:

  • Monthly draws for completed work
  • Lender inspections and approvals
  • Retainage held (typically 10%)

Conversion or refinance:

  • Construction loan converts to permanent (some banks)
  • Or refinanced into permanent debt at completion

Other capital sources

Mezzanine debt:

  • Subordinate to construction loan
  • 70-85% combined LTC
  • Higher rate (10-15%)
  • Less common for typical development

Preferred equity:

  • Subordinate to debt, senior to common equity
  • Fixed return
  • 8-15% return typical

Joint venture:

  • Operating partner contributes expertise
  • Capital partner contributes money
  • Profit shared per agreement

Crowdfunding:

  • Online platforms (CrowdStreet, RealtyMogul, EquityMultiple)
  • Smaller individual investors
  • Public offering or private offering

Operating pro forma

After completion, the building generates operating income.

Income projection

For each tenant or unit:

  • Base rent ($/SF or $/unit)
  • Recoveries (NNN reimbursements)
  • Other income (parking, storage, vending)
  • Vacancy (5-10% typical assumption)
  • Bad debt (1-2%)

Effective gross income = Sum of all income minus vacancy and credit loss

Expense projection

For each expense category:

  • Property taxes (post-development assessment)
  • Insurance
  • Utilities (common areas)
  • Repairs and maintenance
  • Property management (3-5% of EGI)
  • Legal and professional
  • Marketing
  • Reserves

Total operating expenses

NOI

NOI = Effective gross income - Operating expenses

NOI is the foundation of value.

Stabilized value

Project value at stabilization:

Stabilized value = Stabilized NOI / Exit cap rate

Exit cap rate assumptions should reflect:

  • Current market for similar properties
  • Anticipated market changes
  • Tenant credit and lease terms
  • Property condition and age (new building benefits from low age)

Be realistic — don't assume exit cap rates compress just because you want them to.

Returns analysis

Several metrics measure project returns.

Yield on cost

Yield on cost = Stabilized NOI / Total project cost

This is the most fundamental development metric. Compare to:

  • Market cap rates for stabilized properties
  • Spread between yield on cost and market cap rate = development profit

A typical target:

  • Yield on cost: 7-9%
  • Stabilized cap rate: 5-7%
  • Spread (development profit margin): 100-300 bps

Development profit

Development profit = Stabilized value - Total project cost
Profit margin = Development profit / Total project cost

Target: 15-25%+ profit margin on cost.

IRR (Internal Rate of Return)

The annualized return on equity over the development and hold period.

Targets for development:

  • 18-25% leveraged IRR for stabilized hold
  • 25-35% leveraged IRR for development and exit at stabilization
  • Higher for higher-risk projects

Equity multiple

Equity multiple = Total cash returned / Total equity invested

Targets:

  • 1.5-2.5x equity multiple over 3-5 years
  • Higher for longer holds
  • Higher for higher-risk projects

Cash-on-cash return

Cash-on-cash = Annual cash flow / Equity invested

For stabilized year:

  • 6-10% cash-on-cash typical for development hold
  • Lower in early years due to ramp

LTC (Loan-to-Cost) and LTV (Loan-to-Value)

LTC = Loan amount / Total project cost
LTV = Loan amount / Stabilized value

LTC affects equity required. LTV affects refinance proceeds.

Sensitivity analysis

A robust pro forma tests assumptions:

Key sensitivities

Hard cost overrun:

  • What if costs are 5% higher? 10% higher? 15% higher?
  • Test contingency adequacy

Rent shortfall:

  • What if rents are 5% lower? 10% lower? 15% lower?
  • Test demand assumptions

Lease-up delay:

  • What if it takes 6 months longer to stabilize?
  • Test interest reserves and operating cash flow

Cap rate widening:

  • What if exit cap is 50 bps higher? 100 bps higher?
  • Test exit value sensitivity

Interest rate increase:

  • What if construction loan is 100 bps higher?
  • Test interest reserves

Stress scenarios

Base case: Realistic assumptions throughout Downside case: 10% cost overrun + 10% lower rents + 50 bps cap rate widening Upside case: 5% cost savings + 5% higher rents + 25 bps cap rate compression

A robust project survives the downside case with positive returns (even if reduced). A fragile project loses money in the downside case.

Worked example: Lakeland retail center pro forma

You're developing a 7,500 SF retail building plus 2 outparcels on 2.5 acres.

Sources and uses

Uses:

  • Land: $2,000,000
  • Hard costs: $4,200,000
  • Soft costs: $620,000
  • Financing costs (interest reserve, fees): $280,000
  • Contingency: $400,000
  • Total: $7,500,000

Sources:

  • Construction loan (65% LTC): $4,875,000
  • Equity: $2,625,000
  • Total: $7,500,000

Operating pro forma (stabilized)

Income:

  • In-line retail: 7,500 SF × $30/SF NNN = $225,000
  • Outparcel #1 (QSR ground lease): $80,000
  • Outparcel #2 (drive-thru coffee): $90,000
  • NNN reimbursements: $80,000
  • Effective gross income: $475,000
  • Vacancy and credit loss (5%): -$23,750
  • Net effective income: $451,250

Expenses (most reimbursed via NNN):

  • Operating expenses: $80,000
  • NOI: $371,250

Returns analysis

  • Stabilized value at 6.25% cap: $5,940,000

Wait — this is below the project cost. Let me reconsider.

Actually with the outparcels, we should ground lease them and sell the in-line separately, or structure differently. Let me revise.

Revised approach

  • Sell outparcels at completion (each at 5.5% cap)
    • Outparcel 1 sale: $80K / 5.5% = $1,455,000
    • Outparcel 2 sale: $90K / 5.5% = $1,636,000
    • Total outparcel sales: $3,091,000
  • Hold in-line retail for cash flow
    • In-line NOI: $305,000 - $80,000 expenses = $225,000
    • Stabilized in-line value at 6.25% cap: $3,600,000

Total project value: $3,091,000 + $3,600,000 = $6,691,000

Still below cost. Let me reconsider hard costs and rents.

Realistic revision

Either reduce costs, increase rents, or different exit:

  • Reduce in-line construction to $3,800,000 (more realistic for 7,500 SF strip)
  • Total cost: $7,100,000
  • In-line rents at $32/SF: $240,000 income, $200,000 NOI after expenses
  • In-line value: $3,200,000 / 6.25% = wait...

Let me restart this example more carefully.

Restart: Lakeland retail center

Project:

  • 7,500 SF in-line retail building
  • 2 outparcel pads (sold or ground leased)
  • 2.5 acres

Costs:

  • Land: $2,000,000
  • Hard costs (in-line shell + site work for entire site): $2,800,000
    • Shell building: $250/SF × 7,500 = $1,875,000
    • Site work (entire site): $700,000
    • General conditions and fee: $225,000
  • Soft costs: $450,000
  • Financing costs: $200,000
  • Contingency: $300,000
  • Total project cost: $5,750,000

Revenue at stabilization:

  • In-line retail: 7,500 SF × $32/SF NNN = $240,000
  • Outparcel #1 ground lease: $80,000
  • Outparcel #2 ground lease: $90,000
  • NNN reimbursements (for in-line tenants): $40,000
  • Total income: $450,000
  • Vacancy/credit loss (5%): -$22,500
  • Effective income: $427,500
  • Operating expenses: -$50,000 (most reimbursed)
  • NOI: $377,500

Stabilized value:

  • Blended cap rate ~6.0%: $6,290,000

Development profit: $6,290,000 - $5,750,000 = $540,000 = 9.4% profit margin

This is below my 15-25% target. The deal doesn't pencil at these assumptions.

Alternatives

  • Higher rents (push for $35/SF in-line): adds $25K/year NOI = $415K more value
  • Lower costs: tight construction management
  • Sell outparcels rather than ground lease (premium)
  • Add a third outparcel if site supports

This is what real underwriting looks like — you iterate until the project either pencils or you walk away.

Final pencil-out

  • Outparcels sold at completion: $1,455K + $1,636K = $3,091K
  • Net land + cost basis after outparcel sales: $5,750K - $3,091K = $2,659K
  • In-line stabilized NOI: $190,000 (after pulling out the outparcel income)
  • In-line stabilized value: $190K / 6.5% = $2,923K
  • Profit on in-line: $2,923K - $2,659K = $264K = 9.9% margin

Still tight. Either rents need to be higher, costs lower, or this isn't the right deal.

Common pro forma mistakes

  1. Optimistic rents — using top-of-market for projections
  2. Aggressive cap rates — assuming compression that may not happen
  3. Inadequate contingency — 5% is too low; use 10-15%
  4. Missing soft costs — design, fees, permits, financing, marketing
  5. Underestimating timeline — extends interest and operating costs
  6. Ignoring lease-up costs — TI, free rent, commissions
  7. Wrong financing assumptions — rates, fees, terms
  8. No sensitivity analysis — fragile to small changes
  9. Wishful absorption assumptions — slow lease-up kills returns
  10. Forgetting impact fees — can be the largest single cost

What to take away

  • Pro forma is the financial model that drives go/no-go decisions
  • Components: sources/uses, budget, draw schedule, operating pro forma, cash flow, returns, sensitivity
  • Land typically 15-25% of total cost
  • Hard costs vary widely by product type and quality
  • Soft costs typically 15-25% of hard costs
  • Contingency should be 10-15% of total
  • Yield on cost minus exit cap rate = development profit margin
  • Target: 15-25% profit margin on cost
  • Multiple return metrics: IRR, equity multiple, cash-on-cash, yield on cost
  • Sensitivity analysis essential — test costs, rents, cap rates, schedule
  • Walk away if the project doesn't pencil — don't force bad deals
  • Common mistakes: optimistic rents, aggressive caps, inadequate contingency, missing costs

Next lesson: lease-up, stabilization, and the developer's exit — the final phase of development that determines whether your pro forma becomes reality.

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