What Is Rental Property?
A rental property is an investment property you hold for rent. You buy it, find tenants, collect rent, and pay operating expenses—property tax, insurance, maintenance, vacancy rate reserves. What's left after the mortgage is cash flow. The Deal Analysis guide shows how to run the numbers. NOI and cap rate drive the analysis; cash-on-cash return measures your yield on the money you put in.
A rental property is real estate you own and lease to tenants to generate income—as opposed to living in it yourself or flipping it.
At a Glance
- What it is: Property you own and rent out for income—not for personal use or quick resale.
- Why it matters: Cash flow and equity build over time; depreciation shelters income.
- Key metrics: NOI, cap rate, cash-on-cash return, DSCR.
- Expense categories: Operating expenses (tax, insurance, maintenance, vacancy rate); capex for big-ticket replacements.
- Where to start: First Rental Property guide and Deal Analysis guide.
How It Works
The income stack. Gross rent is what tenants pay. Subtract operating expenses—property tax, insurance, maintenance, property management (if you use it), and a vacancy rate reserve (5–8% of gross)—and you get NOI. NOI is before debt. It's the property's true income. A $1,400/month gross rent with $420 in monthly operating expenses gives you $980/month or $11,760/year in NOI.
The cap rate check. Cap rate = NOI ÷ purchase price. A $196,000 rental property with $11,760 NOI runs 6%. Compare that to the real estate market—Memphis might average 6.5%, Austin 4.2%. Lower cap means you're paying more per dollar of income. Higher cap means more yield but often more risk (older stock, weaker neighborhoods, or thinner real estate market liquidity).
After the mortgage. Cash flow = NOI minus debt service. A $1,050/month payment on that $196,000 property (assuming 75% LTV at 7%) leaves you $30/month in cash flow. Thin—but you're building equity through principal paydown and betting on appreciation. Cash-on-cash return = annual cash flow ÷ cash invested. $360/year on $49,000 down = 0.7%. Not great. You're banking on equity build.
The capex reserve. Operating expenses cover routine stuff. Capex—capital expenditures—covers roofs, HVAC, major systems. Rule of thumb: set aside $200–$400 per unit per year for capex. A 20-year-old roof will need replacement. Budget for it before it blows up your cash flow.
Real-World Example
Lisa: Single-family in Memphis.
She buys a 3-bedroom for $158,000. Down: $39,500 (25%). Mortgage: $118,500 at 7% for 30 years. Payment: $788/month. Rents for $1,325. Operating expenses:
- Property tax: $1,896/year
- Insurance: $1,080
- Maintenance: $1,200
- Vacancy rate (6%): $954
Total operating expenses: $5,130. NOI: $15,900 − $5,130 = $10,770. Cap rate: 6.8%. Cash flow after mortgage: $10,770 ÷ 12 − $788 = $110/month. Cash-on-cash return: $1,320 ÷ $39,500 = 3.3%. Modest—but she's building equity and depreciation shelters some of the income.
Kevin: Duplex in Cleveland, BRRRR exit.
He buys for $72,000, rehabs for $38,000. ARV: $148,000. Rents both units for $1,450 total. NOI after operating expenses: $10,200. He refinances at 75% LTV: $111,000 loan. Pockets $1,000 after paying off the acquisition loan. Now he owns a rental property with almost no capital left in the deal. Cash flow: $185/month. Cash-on-cash return on his recycled capital: effectively infinite—he's got $1,000 left in. That's BRRRR.
Pros & Cons
- Monthly cash flow can cover the mortgage and leave a margin.
- Equity builds through principal paydown and appreciation.
- Depreciation reduces taxable income while you hold.
- 1031 exchange defers capital gains when you trade up.
- Tenants, repairs, and vacancy rate create operational headaches.
- Capex hits in lumps—a $12,000 roof wipes out a year of cash flow.
- Illiquid—selling takes time and costs closing costs.
- Leverage amplifies losses when market value drops.
Watch Out
- Underestimating operating expenses: New investors often lowball maintenance and vacancy rate. Use 6–8% vacancy, 8–12% of rent for maintenance. Reality will test your numbers.
- Cap rate compression: Buying at a 4% cap in a hot real estate market means you need appreciation. If the real estate market flattens, you're stuck with thin yield.
- DSCR trap: If you refinance and the new payment is higher, DSCR can drop below the lender's minimum. Run the math before you pull cash out.
- Exit risk: Selling triggers capital gains and depreciation recapture. 1031 exchange has strict deadlines—45 days to identify, 180 to close.
Ask an Investor
The Takeaway
A rental property is an investment property you hold for rent. Run NOI, cap rate, and cash-on-cash return before you buy. Budget operating expenses and capex conservatively. The Deal Analysis guide and First Rental Property guide walk through the full analysis.