Most investors open a commercial deal and feel one of two things: I think this is good — but I don't actually know, or the model gets bigger than their confidence and they close the tab.
Neither is a real answer. And "is this a good deal?" is the wrong question. The right move is to stop asking and start knowing — and you can get 80% of the way there in about ten minutes, before you spend a single hour on a full underwrite.
These are the seven things I look at first when a commercial deal hits my desk. If a deal fails three or more of them, I'm out — I don't waste another minute. If it passes, then it earns the deep work. Pull up the listing and the seller's numbers and run them in order.
Cap rate vs. the submarket — is it priced right, or priced like a fantasy?
What to look atTake the property's real net operating income (NOI = all income minus all operating expenses, before the mortgage) and divide it by the asking price. That's the cap rate. Then compare it to what similar buildings in that exact submarket are actually trading at.
Why it matters: Cap rate is the deal's price tag in plain English. A cap rate well below the submarket means you're paying a premium the income doesn't justify — and you'll feel it the day you try to sell.
DSCR — will the building pay its own mortgage?
What to look atDebt-Service Coverage Ratio = NOI ÷ annual debt service (the full mortgage payment for the year). It answers the only question the bank actually cares about: does the property's income cover the loan?
Why it matters: This is the whole game. In commercial, the bank evaluates the asset, not you — and DSCR is how it does it. A deal that clears 1.25x qualifies on its own income, no matter what your credit score says.
T-12 actuals vs. the proforma — are you buying reality or a brochure?
What to look atGet the trailing-twelve-months (T-12) actual operating statement and lay it next to the broker's proforma. Compare line by line: actual income vs. projected income, actual expenses vs. projected expenses.
Why it matters: Brokers sell the proforma — the dream version. You're buying the T-12 — the real version. The gap between them is exactly where investors overpay. Underwrite the actuals and treat every proforma promise as something you have to earn, not something you're handed.
Rent-to-market gap — is there real upside, or is it already maxed out?
What to look atCompare in-place rents to true market rents for that submarket and unit type. The gap tells you whether there's room to raise income — and how much risk you're taking to get it.
Why it matters: The safest money in commercial real estate is closing a believable rent gap. A small, provable gap is the cleanest path to forced value. A gap you have to invent is how good-looking deals quietly lose money.
Expense ratio sanity — do the operating costs even make sense?
What to look atDivide total operating expenses by gross income. That's the expense ratio. Compare it to what a building like this actually costs to run — taxes, insurance, management, maintenance, utilities, vacancy.
Why it matters: A suspiciously low expense ratio is the most common way a proforma lies. When expenses are understated, NOI is overstated, the cap rate looks better than it is, and you overpay. Sane expenses are the difference between the deal you think you're buying and the one you actually own.
Exit / refi assumptions — does the plan survive a higher cap rate?
What to look atFind the exit cap rate the deal assumes when you sell or refinance. The honest move is to assume you exit at a higher cap rate than you bought at (cap rates tend to drift up over a hold), and check whether the returns still hold.
Why it matters: Most of the return in a lot of commercial deals is hiding in the exit assumption. Shave the exit optimism and you find out fast whether you're buying real cashflow or a bet on the market. Cap-rate expansion is what wipes out investors who only modeled the upside.
Break-even occupancy — how much can go wrong before you bleed?
What to look atCalculate the occupancy level where the building's income exactly covers all expenses plus the mortgage — the break-even point. Then measure the buffer between that and the occupancy you're actually underwriting.
Why it matters: Everything above tells you what the deal does when it goes right. This tells you what happens when it goes wrong — and deals are won or lost on the downside. A fat break-even buffer is what lets you sleep at night when the market doesn't cooperate.
How to score it
Give each check a green = 2, yellow = 1, red = 0. Add them up out of 14.
Want to stop screening and start knowing — on your real deals?
This is the fast filter — the first ten minutes. The full system is where you take a deal that passed the screen and underwrite it to the dollar, then bring it to a live review and have it ripped apart with you until you can read a 60-unit the way you read a duplex. That's Underwriting Mastery, one of three pillars inside the Cashflow Code.
If you own a couple of rentals, you're done "researching," and you want to place your first commercial offer in the next 30 days:
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