The Cap Rate Trap: Why Your 8% Deal May Actually Be a 4% Deal

When a sponsor puts an 8% cap rate at the top of a marketing deck, most investors nod. Fewer ask the harder question: cap rate on what NOI, in what year, under what assumptions?

Trick #1: The pro-forma cap rate. Sponsors often quote the cap rate on Year 2 or Year 3 NOI — after their proposed rent bumps, expense trims, and occupancy improvements. In reality you are buying the trailing 12 months (T12) NOI. A property trading at a 6% cap on T12 might get labeled "8% pro-forma" simply by baking in the sponsor's best-case scenario.

Trick #2: Below-market expense assumptions. Insurance, property taxes, and management fees are the three line items I see manipulated most. In storm-prone markets, insurance can jump 40-60% at the next renewal. Property taxes reassess on sale in almost every state. And management fees below 3.5% for multifamily under 200 units are almost never sustainable. Rebuild the operating statement with defensible numbers before you trust anyone's cap rate.

Trick #3: Ignoring capex reserves. A true economic cap rate accounts for the roof, HVAC, parking lot, and unit turns you will actually pay for. If the sponsor is quoting a cap rate that assumes $0 in ongoing capital reserves, the number is fiction.

The fix is simple: ask for the T12 P&L, rebuild the operating statement with your own assumptions, and calculate the cap rate on YOUR numbers, not theirs. If the deal still pencils, you have a real opportunity. If not, you just saved yourself the loss.