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Underwriting Assumptions: How to Read a Sponsor's Deal for Honesty
Capital Raising

Underwriting Assumptions: How to Read a Sponsor's Deal for Honesty

July 2, 2026

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By Tanner Sherman, Managing Broker

A deal does not fall apart because the sponsor was dishonest with you. It falls apart because the sponsor was dishonest with a spreadsheet. The underwriting assumptions are where optimism hides, and if you know where to look, you can read a sponsor's honesty before you ever wire a dollar.

Most passive investors read the return summary and stop there. That is the wrong page. The return is an output. The assumptions are the inputs, and inputs are the only thing you can actually judge. A projected return tells you what the sponsor hopes. The assumptions tell you whether that hope is grounded or manufactured.

Here is how we read three of them, and how you can too.

The Exit Cap Is the First Confession

The exit cap rate is the sponsor telling you what they believe the property will be worth when they sell. It is also the single easiest number to fudge, because a small change makes the whole model look brilliant.

The honesty test is simple. Compare the exit cap to the entry cap. If a sponsor buys at a 6 cap and underwrites an exit at a 5.5 cap, they are betting the market will pay more for the same income years from now. That is not an investment thesis. That is a wish.

We hold our own models to a discipline: the exit cap should be equal to or higher than the entry cap. Expanding the cap by a quarter or half point over the hold assumes the market gets slightly worse, not better. If the deal still works under that pressure, the deal is real. If it only works when you assume a friendlier future, the return was borrowed from a market that has not shown up yet.

Ask the sponsor one question. "Why this exit cap?" A grounded operator will point to where they bought, the age of the asset, and a margin of caution. A promoter will talk about momentum.

Rent Growth Is Where Fantasy Lives

Every model needs a rent growth assumption, and every model is tempted to inflate it. A point or two of annual rent growth, compounded over a five or seven year hold, can carry a mediocre deal across the finish line on paper.

The test here is comparison to reality. Long-run rent growth in stable markets tends to track a modest range. When you see a sponsor underwriting well above that, year after year, ask what specifically drives it. Sometimes there is a real answer, a value-add plan where units are being repositioned and the higher rent reflects a genuinely better product. That is defensible. What is not defensible is broad, unexplained rent growth applied to units that are not changing.

This is where asset management earns its keep. A projection is only as good as the operating discipline behind it. We do not just pencil in a rent number and hope. We hold our operating team to occupancy and expense benchmarks that protect the income the model depends on. The assumption on the page has to be matched by a machine that can actually deliver it, month after month, without the investor in the room and without us in the boiler room.

If a sponsor cannot connect the rent growth number to a concrete plan and a team accountable for hitting it, treat the number as decoration.

Reserves Tell You Who Eats the Surprise

Reserves are the least glamorous line in the underwriting and the most revealing. Reserves are the cash set aside for the things that will go wrong, because things will go wrong. A roof, a boiler, a soft leasing quarter, a rate that resets higher than planned.

A thin reserve makes a return look bigger today. It also means the first surprise comes straight out of investor distributions. When you read a model, look for whether the sponsor funded real capital reserves and an operating cushion, or whether they stripped reserves to the bone to make the headline number sing.

We would rather show a more honest return with reserves fully funded than a prettier one that leaves nothing for the day the building has a bad month. Capital preservation is not a slogan. It is a line item. You can see it, or you can see its absence.

The Real Tell: Where the Leverage Sits

Zoom out from the individual assumptions and look at the structure. In many deals, leverage is placed at the beginning, maximum debt on day one to juice the early return. That means the downside hits the investor first and hardest, because debt gets paid before equity does.

Our approach puts leverage at the end, not the beginning. Buy right, stabilize the income, then borrow against proven performance rather than projected performance. It is a slower story. It is also the difference between a return that survives a hard year and one that evaporates in it.

Alignment shows up the same way. Ask when the sponsor gets paid. A structure where the sponsor collects fees and a promote before investors clear a preferred return is a structure where the sponsor eats first. We built ours so that we do not collect a promote until investors clear their hurdle. That is not a favor. It should be the standard you measure every sponsor against.

The Takeaway

You do not need to be an underwriter to read one honestly. Pull three numbers: the exit cap, the rent growth, and the reserves. Ask whether each one assumes the future gets harder or easier. Honest models assume harder and still work. Optimistic models need the future to cooperate.

Transparency is the product. A sponsor who welcomes these questions is showing you how they think under pressure, which is exactly what you are buying. If you want to see how we stress-test our own assumptions before we ever present a deal, we would be glad to walk you through the process. Not to pitch you. To make you a sharper reader of every deal you see, including the ones that are not ours.

Important Disclosures

This article is for educational purposes only. It is not investment, legal, tax, or accounting advice, and it does not constitute a recommendation to buy or sell any security. Top Tier Investment Firm is not acting as your attorney, certified public accountant, or investment adviser. Nothing in this article is an offer to sell or a solicitation of an offer to buy any security. Any investment in a Top Tier fund would be made solely through the fund's formal offering documents and is available only to verified accredited investors. Real estate investing involves risk, including the possible loss of principal. Past performance does not guarantee future results. Consult your own attorney, CPA, and financial adviser before making any investment decision.

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