What a sponsor's pro forma doesn't tell you about your deal.

Every deal starts with a pro forma. The sponsor sends it over the same way a broker sends a flyer, polished, confident, and structured to close. It isn't a lie. It's the most flattering version of the deal.

For the person writing the check, that's the problem. The pro forma is the only model you see, and it was built by the people whose paycheck depends on you saying yes.

This isn't a screed against sponsors. Most are sophisticated, most are honest, and most genuinely believe in the deal they're presenting. But "honest" and "complete" aren't the same thing. A sponsor's job is to build the case. Your job is to test it. And the gap between those two, the assumption-by-assumption pressure-test that comes between the offering memorandum and the wire, is what kills more deals than any other single thing in commercial real estate.

Below are five places where the gap shows up most often. Together, they're the reason a CIO-level second read on a deal has stopped being a luxury and started being baseline diligence.

1. Rent growth is almost always optimistic.

The rent growth assumption is the easiest number to overstate, because it compounds. A 3% annual lift becomes a 4% lift in the model, and suddenly the deal pencils. The trouble is that the model is now sitting on a five-year forecast that has very little to do with the actual submarket.

An independent read pulls real comp data, not zip-code averages, not CoStar headline figures, but actual recent transactions inside the submarket. Three out of four times, the assumed growth has no historical anchor. Sometimes the deal still works at a more conservative rent assumption. Sometimes it doesn't. Either way, you should know before the LOI goes out, not after.

2. Exit cap rates ignore the cycle.

The exit cap drives more of your return than almost any other assumption in the model. Sponsors tend to model exit caps tighter than entry, implying the market will be hotter when you sell than when you bought. Sometimes that's true. Sometimes it's a fantasy.

A CIO-level read stress-tests the exit two ways: at the entry cap, and at one notch wider. If the deal doesn't pencil at parity, you need to know that. The number isn't a forecast; it's a test of whether the deal still works when the market doesn't cooperate.

The exit cap drives more of your return than almost any other assumption. If the deal doesn't pencil at parity to the entry cap, you're betting on a tighter market, not buying a stronger asset.

3. Lease-up assumes everything goes right.

Most pro formas assume lease-up happens cleanly, without months of vacancy, without concessions, without operator drag. Real lease-up has all three. An independent underwriting bakes in a realistic ramp, one based on similar repositioning projects in the actual submarket, and shows you what the deal looks like if lease-up takes 30, 60, or 90 days longer than promised.

This is also where sponsor incentives diverge from yours the most clearly. The sponsor is paid on the closing. The lease-up risk lands on you.

4. Operating expenses grow faster than the model says.

Insurance, property taxes, payroll, utilities. Every line in the operating expense column has moved faster than CPI for the past five years. Pro formas tend to grow opex at 2–3%. Real opex has grown closer to 5–7%, and in markets with unusual insurance dynamics or property-tax reassessment rules, the gap is wider.

An independent model tests the deal at the actual trend, not the polite assumption. It's the single line item most likely to turn a "good deal" into a marginal one in year three.

5. Reserves and capex are systematically under-budgeted.

The roof. The HVAC. The parking lot. The line items nobody wants to think about because they break the model. Sponsors routinely under-reserve, especially on value-add deals where every dollar of "above the line" reserve is a dollar that doesn't show up in the projected IRR.

An independent read goes through the unit-level capex schedule line by line, marks where the reserve is light, and shows you what the deal returns when the reserve is actually funded.

The discipline behind the discipline.

Independent underwriting doesn't kill deals. It changes them. Sometimes it means you walk. More often, it means you reprice the bid, and walk into the LOI with assumptions you've already defended.

In the deals we've seen go badly over the last cycle, the model usually wasn't the problem. The problem was that nobody owned the assumption-by-assumption pressure-test between the offering memorandum and the wire. A sponsor can't credibly do that, they're the seller. Your broker won't, they're conflicted. Your lender will do part of it, but they're optimizing for their loan, not your equity.

That gap, between the sponsor's model and the actual decision, is what a fractional investment office fills. A CIO-level sounding board whose only job is to ask the questions the sponsor's pro forma never answers.

When the math works.

For a deal under $5M, the cost of independent underwriting is a fraction of a percent of the equity at risk. For a deal over $25M, it's a rounding error. In both cases, it's the cheapest insurance you can buy on the decision in front of you, and the only insurance whose value compounds across every deal you do.

The investors and developers who do this consistently end up with a track record that looks different in one specific way: they pass on more deals. The ones that close, close stronger. That's not because they're better deal-pickers. It's because they bring a second mind to every deal before they sign.

The pro forma is the question. The second read is the answer.