I looked at a 16-unit in Omaha last month that was listed at a 9.2% cap rate. On paper, it was the best deal on the market. In reality, it was a money pit wearing a tuxedo.

The seller had calculated NOI using pro forma rents that were $125/unit above actual collections, excluded $14,000 in annual maintenance costs, and conveniently left out the $8,000 property management fee he wasn't paying because he self-managed.

Once I underwrote it with real numbers, the cap rate was 5.8%. A completely different deal.

This happens constantly. And the investors who make decisions based on the listed cap rate are the ones who call me two years later asking why their "high-yield" property is bleeding cash.

What a Cap Rate Actually Tells You (And What It Doesn't)

The formula is simple: NOI / Purchase Price = Cap Rate.

That's it. It's a snapshot of yield at a single point in time, based on a single year of income and expenses. It tells you what the property earns today relative to what you pay for it.

Here's what it doesn't tell you:

Whether the income is sustainable

Whether the expenses are complete

Whether the building needs a $60,000 roof next year

Whether rents are above or below market

Whether the tenants are paying or just occupying

Whether the market is growing or contracting

A cap rate is a starting point for analysis. The problem is that most buyers treat it as the finish line.

The Three Lies Hidden in Every Cap Rate

Lie #1: The Income Is Real

I watched an investor close on a 12-unit last year because the rent roll looked bulletproof. Six months later, he realized three tenants hadn't paid full rent in over a year and the seller's "income" was a wish list.

Sellers report income based on scheduled rent, not collected rent. There's a massive difference.

A 16-unit building with rents at $950/unit shows $182,400 in annual scheduled income. But if three units are vacant, two tenants are behind on rent, and one unit is rented $100 below market because the tenant has been there since 2018, actual collections might be $148,000.

That's a $34,400 gap between what the seller says the building makes and what it actually collects. On a $1.2M purchase price, that gap alone moves the cap rate from 9.2% down to 6.3%.

Always ask for:

Trailing 12-month bank deposits (not a P&L, actual bank statements)

Rent roll with move-in dates and lease expiration dates

Collections rate (what percentage of billed rent was actually collected)

If the seller won't provide bank statements, walk away. That isn't a negotiation tactic. That's a red flag.

Lie #2: The Expenses Are Complete

I have seen a seller report a 38% expense ratio on a building that actually ran at 57% once you included management, reserves, and the insurance renewal he conveniently left off the sheet. That gap was worth $34,000 a year in phantom profit.

This is where the real manipulation happens. Sellers routinely understate expenses by:

Excluding property management. If the seller self-manages, they report zero management cost. But you're going to pay a PM (or your time is worth something). Add 8-10% of gross income for management.

Deferring maintenance. The building looks fine because they haven't replaced anything in five years. That isn't low maintenance cost. That's deferred expense waiting to explode.

Understating insurance. They might show last year's premium, but insurance in Omaha has jumped 20-35% over the past three years. Get a current quote before you underwrite-a-multifamily-acquisition).

Ignoring capital reserves. No reserves line item means the seller isn't setting aside money for roofs, HVAC, parking lots, and appliances. You need to budget $250-$500/unit/year for cap-ex reserves, depending on the age and condition of the building.

I have seen deals where the seller's stated expenses were 40% of gross income and the actual stabilized expense ratio was closer to 55-60%. On a $180,000 gross income property, that's a $27,000-$36,000 difference in expenses. Which means the NOI the cap rate is based on is fiction.

Lie #3: The Market Is Static

I have watched investors buy "7 caps" in softening markets and sell at a loss three years later, confused about how the math went wrong. The math didn't go wrong. They just forgot that cap rates move.

A cap rate assumes the world doesn't change. But the world always changes.

If you buy a property at a 7% cap rate in a market where cap rates are compressing (more demand, prices going up), you might be sitting on a 6% cap rate exit in three years, which means your property is worth more when you sell. That's a tailwind.

If you buy at a 7% cap in a market where cap rates are expanding (less demand, prices going down), your 7% purchase could be a 8.5% cap market in three years, which means your property lost value. That's a headwind.

The cap rate at purchase tells you nothing about direction. You need to understand where the market is going, not just where it's today.

What to Look at Instead

Cap rate is one data point. Here are the others I look at before I make a decision on any acquisition:

Expense Ratio. Total operating expenses divided by gross income. For B and C class multifamily in Omaha, a stabilized expense ratio should be 45-55%. If the seller is showing 35%, their numbers are incomplete.

Rent-to-Value Ratio. Monthly gross rent divided by purchase price. I want to see at least 1.0% for a deal to pencil in the Midwest. A $500,000 property should generate at least $5,000/month in gross rent. Below that, the cash flow math gets tight.

DSCR (Debt Service Coverage Ratio). NOI divided by annual debt service. Lenders want 1.20-1.25x minimum. I want 1.35x or higher because I want a cushion for when things go wrong. And things always go wrong.

Deferred Maintenance Estimate. Walk the property with a contractor before you buy. Get a written estimate for everything that needs to be addressed in the first 24 months. Add that to your acquisition cost. If the "great cap rate" disappears after accounting for $80,000 in deferred maintenance, it was never a great cap rate.

Rent Growth Potential. Are the current rents at market? Below market? Above? If rents are $100 below market across 16 units, that's $19,200/year in upside you can capture through lease renewals and unit upgrades. That changes the yield profile significantly, even if the going-in cap rate is mediocre.

A Real Example

Two deals we looked at last quarter, both in Omaha:

Deal A: Listed at an 8.5% cap, 12 units, asking $780,000. Looks great. Deal B: Listed at a 6.8% cap, 14 units, asking $1.05M. Looks average.

After full underwriting:

Deal A had $45,000 in deferred roof and plumbing work, rents were $50/unit above market (previous PM had been aggressive on increases and was losing tenants), and the expense ratio was 38% (no management, no reserves). Real cap rate: 5.9%. Real cash-on-cash with financing: 3.2%.

Deal B had rents $75/unit below market, a new roof (2024), and an owner who had been managing through a PM at full fee. The stated expenses were complete and verified. Going-in cap rate was 6.8%, but with a 12-month rent adjustment plan, the stabilized cap rate was 8.4%. Cash-on-cash with financing: 9.1%.

The "worse" deal on paper was the better deal in reality. By a mile.

The Point

Stop leading with cap rate. It isn't a useless metric, but it's an incomplete one, and it's the most easily manipulated number in any listing package.

When someone tells me a deal is a "9 cap," my first question is always: "Whose numbers?" Because a 9 cap on the seller's P&L and a 9 cap on verified financials are two completely different investments.

Do the work. Verify the income. Complete the expenses. Walk the property. Then decide if the cap rate is telling the truth.

Most of the time, it isn't. And the investors who figure that out after closing are the ones writing checks they never planned on writing. Verify the numbers or become the cautionary tale. There's no middle ground.

For weekly market insights and real operator perspective, catch the Freedom Fighter Podcast on Spotify, Apple, or YouTube.

Tanner Sherman is the Principal and Managing Broker of Top Tier Investment Firm in Omaha, Nebraska. He co-hosts the Freedom Fighter Podcast with Ryan of Avara Investments.

Cap Rates Are Lying to You