The Pro Forma & Return Metrics

A pro forma is the financial model projecting whether a deal makes money. For income property it estimates revenue, expenses, and value.

Building blocks

• NOI (Net Operating Income) = rental income − operating expenses (before debt).
• Cap rate — NOI ÷ value. Used to estimate value: Value = NOI ÷ cap rate.
• Development cost — from your Sources & Uses.

Key return metrics

• Yield on cost (development yield) = stabilized NOI ÷ total cost. Compare it to market cap rates — the spread is your development profit.
• Profit / cost — total value created vs. total cost.
• IRR (Internal Rate of Return) — the annualized return accounting for timing of cash flows.
• Equity multiple — total cash returned ÷ equity invested.

The point

The pro forma answers one question: is the value you'll create worth more than what it costs to create — by enough margin to justify the risk? If the spread is thin, the deal doesn't pencil.

Going Deeper (Intermediate)

The pro forma projects costs, revenue, and returns. Core metrics: profit margin, yield-on-cost, IRR, equity multiple, cash-on-cash, and for income property, cap rate and DSCR. Each answers a different question.

Advanced / Pro-Level

Underwrite like a pro — and develop to a spread:

• Yield-on-cost = stabilized NOI ÷ total cost; compare it to the market cap rate. The development spread (often ~150–200+ bps above the cap rate) is your reward for the risk — develop to a spread.
• IRR (time-weighted, very sensitive to timeline) vs. equity multiple (total return, ignores time) vs. cash-on-cash.
• DSCR = NOI ÷ debt service — lenders want ~1.20–1.25+.
• Run sensitivity/scenarios on the big drivers — sale price/rent, cost, exit cap rate, and timing — because small changes swing returns hard.

Practice Challenge

Your project's yield-on-cost is 6.5% and similar finished buildings trade at a 5.0% cap rate. What does the ~150 bps spread mean? (Answer: you can build at a 6.5% yield and the finished asset is worth more (priced at a 5% cap) — that ~150 bps development spread is your profit for taking development risk; if the spread were near zero, the deal wouldn't reward the risk and you'd pass.)

In Practice

A deal with a razor-thin spread between yield-on-cost and market cap rate has no room for surprises — one overrun wipes out the profit. The margin must justify the risk.

Common Mistakes to Avoid

• Thin margins with no cushion
• Optimistic rents and cap rates
• Ignoring the cost of time

Takeaway: The deal only works if the value you create beats your cost by enough to justify the risk.

Educational content — not legal, engineering, or financial advice. Requirements vary by jurisdiction; always confirm with the local authority and your professional team.