The Cap Rate Formula

Cap Rate = Net Operating Income (NOI) ÷ Current Property Value × 100 Net Operating Income (NOI) = Gross Rental Income − Operating Expenses Operating expenses include: property taxes, insurance, property management fees, maintenance and repairs, landscaping, utilities paid by owner, vacancy allowance (typically 5–10% of gross rent). Operating expenses do NOT include mortgage payments — cap rate is calculated without debt service. Example calculation: • Monthly rent: $1,800 (× 12 = $21,600/year gross) • Annual expenses: $3,800 (taxes $1,800 + insurance $900 + maintenance $1,100) • Vacancy allowance (7%): $1,512 • NOI: $21,600 − $3,800 − $1,512 = $16,288 • Purchase price: $250,000 • Cap rate: $16,288 ÷ $250,000 = 6.5% This 6.5% cap rate means: if you paid cash for this property, you would earn 6.5% annually on your investment from operations alone, before any appreciation.

What Different Cap Rates Signal

Cap rates vary significantly by market, property type, and risk profile: Low cap rates (3–4%): common in gateway cities (New York, San Francisco, Los Angeles, Miami Beach). Investors accept lower current returns because they expect strong appreciation, liquidity, and stable demand. Lower risk — high-demand markets with strong tenant pools. Mid-range cap rates (5–7%): common in mid-tier cities and growing secondary markets. Balanced risk/return profile. Most single-family rental investments target this range. High cap rates (8–12%+): typically in lower-demand markets, Class C properties, or properties with significant deferred maintenance or management challenges. The high yield often reflects elevated risk: vacancy risk, tenant quality risk, or market liquidity risk. Rule of thumb: a high cap rate is not automatically better. It often means higher risk or more management intensity. A 10% cap rate in a rural market with high vacancy rates and unreliable tenants may generate less actual return than a 5% cap rate in a supply-constrained urban market.

Cap Rate vs Cash-on-Cash Return

These are two related but different metrics: Cap rate: measures property return without debt. Useful for comparing properties on equal footing regardless of how they're financed. Does not reflect your actual return if you take out a mortgage. Cash-on-cash return: measures the return on your actual cash invested after debt service. Divides annual pre-tax cash flow (after mortgage payments) by the total cash invested (down payment + closing costs). Example: 6.5% cap rate property purchased with 25% down. If your mortgage payments reduce the $16,288 NOI to $8,000 in annual cash flow, and you invested $62,500 down + $5,000 in closing costs = $67,500 total cash invested: Cash-on-cash = $8,000 ÷ $67,500 = 11.9% Leverage amplified the return from 6.5% (cap rate) to 11.9% (cash-on-cash) — because the mortgage rate is lower than the cap rate. This is positive leverage — borrowing enhances return.

“Cap rate is one of the first things I calculate for any investor client looking at a rental property, and one of the most misunderstood by buyers new to real estate investing. The most common mistake: using the asking price as the denominator without questioning whether the seller's stated NOI is accurate. Inflated rent projections, understated vacancy, and excluded maintenance costs can make a mediocre investment look great on paper. Always verify income with actual lease documentation and expenses with actual receipts before relying on a cap rate in an offering memorandum.”

— Ryan Brown, Principal Broker & CEO, Own Luxury Homes®

• All Definitions
• Escrow
• Closing
• Contingency
• Pre-Approval
• DTI
• Amortization
• Underwriting

Own Luxury Homes® — we explain every term before you sign. 12-Point Agent Integrity Audit™. Talk to a specialist ›