The Cap Rate Lied to Me: A Real Estate Investor's Confession

The Cap Rate Math (Pro Forma) The listing showed this calculation: Purchase price: $185,000 Gross annual rent: $23,400 ($975 × 2 units × 12 months) Property tax: $2,405 (1.3% of value) Insurance: $1,680 Net Operating Income: $19,315 Cap Rate: NOI / Purchase Price = $19,315 / $185,000 = 10.4% Wait, where did the 12.6% come from? The listing agent calculated it without property tax and insurance. Just gross rent divided by purchase price: $23,400 / $185,000. I didn't catch that at the time because I was too busy imagining all that passive income flowing into my bank account. Even at the more honest 10.4%, I should have been skeptical. I ran the numbers through our cap rate calculator and got 10.4%. But the calculator can only work with the inputs you give it. And my inputs were dangerously optimistic. The Real Numbers (Year 1) Vacancy: I assumed 5% vacancy. Reality? 11%. One unit turned over in March and sat empty for six weeks while I found a qualified tenant. The other unit had a gap between tenants in October. Total vacancy loss: $2,574 instead of the $1,170 I budgeted. Maintenance: I budgeted 5% of gross rent for maintenance ($1,170). Reality? The water heater died in Unit A ($1,800), the roof needed patching ($2,400), a toilet needed replacing ($350), and there were three general maintenance calls averaging $175 each ($525). Total maintenance: $5,075. I was off by $3,905. That's not a rounding error. That's a fundamental miscalculation. Property management: I told myself I'd manage it myself. Memphis is four hours from Nashville. After three months of late-night phone calls, tenant complaints, and coordinating repairs from another state, I hired a property manager at 10% of collected rent. Annual cost: $2,083. Leasing fees: Property manager charged 75% of one month's rent for placing each new tenant. Two turnovers = $1,463. Eviction costs: One tenant stopped paying in month nine. Legal fees, court costs, and two months of lost rent: $3,400. I was not prepared for this. Nobody at the real estate investing seminars mentioned eviction costs. HOA and special assessments: The duplex wasn't in an HOA, so I thought I was safe. Then the city sent me a notice about sidewalk repairs mandated by a new ordinance. Cost: $2,100. I had no idea municipalities could do this. The Real Year 1 P&L Gross scheduled rent: $23,400 Vacancy loss: -$2,574 Effective gross income: $20,826 Operating expenses: Property tax: $2,405 Insurance: $1,680 Maintenance: $5,075 Property management: $2,083 Leasing fees: $1,463 Eviction/legal: $3,400 City assessment: $2,100 Total expenses: $18,206 Net Operating Income: $2,620 Actual cap rate: $2,620 / $185,000 = 1.4% One point four percent. Not 12.6%. Not 10.4%. One point four. My savings account was paying 4.5%. I felt sick when I calculated this. I ran it through our cash on cash calculator and discovered my actual cash-on-cash return was negative after accounting for my closing costs and the down payment. I had invested $43,000 (down payment plus closing costs) into a property that was paying me less than my checking account would have. Year 2 and 3: The Recovery Things got better. Tenant turnover dropped. I raised rents to $1,025/unit. Maintenance stabilized around $3,500/year after I replaced the major failing systems in year one. By year three, my actual NOI was around $8,900, giving me a real cap rate of 4.8%. Still not 12.6%. Not even close. But at least it was positive, and I was building equity through loan paydown and modest appreciation. Our BRRRR calculator showed that if I could get the property reassessed at a higher value after three years, I might be able to refinance and pull out some equity for the next deal. But the experience left me deeply skeptical of cap rate as a standalone metric.

Calculate what I call the "stress test cap rate." Take the listing's cap rate and subtract 5 percentage points. If the result is still above 5%, the deal might work. If it drops below 3%, walk away. This isn't scientific. It's a rule I developed after getting burned, and it has served me well on subsequent deals. The stress test accounts for the gap between pro forma numbers and reality that I experienced firsthand. Always calculate cash-on-cash return alongside cap rate. Cap rate doesn't account for your financing. Cash-on-cash return tells you what you're actually earning on the money you put in. Run your deal through both our cap rate calculator and a cash-on-cash calculator. If either one looks bad, the deal is bad. Budget maintenance at 10% of gross rent, minimum, for properties over 15 years old. The 5% rule is for newer properties in good condition. Older properties need more. My Memphis duplex was built in 1972. I should have budgeted 12-15%. When I ran the numbers through our BRRRR calculator using realistic maintenance, the deal was clearly marginal from the start. Include vacancy at 10% unless you have concrete evidence it should be lower. A property manager's estimate, a local market report, or your own track record with similar properties. The 5% national average is misleading because it includes professionally managed apartment buildings, not individual landlords like you. Factor in property management from day one. Even if you plan to self-manage, include the cost in your analysis. If the deal only works because you're providing free labor, it's not a good deal. It's a job. A job with 3am phone calls and eviction proceedings.

Trusting the seller's cap rate calculation. Sellers and their agents have every incentive to make the number look good. They'll exclude vacancy, use below-market management fees, underestimate maintenance, and sometimes even include potential rent increases that haven't happened yet. Calculate it yourself using conservative assumptions. Confusing pro forma with actual. Pro forma means "what could happen." Actual means "what did happen." Always ask for the last two years of Schedule E tax filings and actual rent rolls. If the seller won't provide them, assume the numbers are worse than advertised. Ignoring capital expenditures. Maintenance and capex are different things. Maintenance is fixing a leaky faucet. Capex is replacing the roof. You should budget $200-400/unit/month for capex reserves, depending on the age and condition of the property. This is not optional. This is the number that turns a 10% cap rate into a 6% real return. Forgetting that cap rate doesn't include debt service. A property with a 10% cap rate but a 7% mortgage on 80% of the purchase price gives you almost no cash flow. The cap rate looks great but your bank account stays empty. Always calculate both cap rate and cash-on-cash return. Maybe I'm too conservative now. But I'd rather miss a deal than lose money. That Memphis duplex taught me that the best number in real estate isn't cap rate. It's actual cash in your actual bank account after all actual expenses. Calculate that number honestly, and you'll make better decisions than 90% of real estate investors I know.