What Is a Cap Rate? Definition, Formula, and Calculator
Quick Answer
A cap rate (capitalization rate) is the annual return on a real estate investment property expressed as a percentage of its purchase price. It's calculated as Net Operating Income (NOI) divided by property value, and it helps investors quickly compare investment opportunities across different markets and price points.
What Is a Cap Rate?
The cap rate measures how much annual profit you'll generate relative to your total investment. It answers the fundamental question: "What percentage return will I make on this property?"
Unlike stocks or bonds, real estate returns come from both rental income and property appreciation. The cap rate focuses purely on the income component, ignoring potential price growth. This makes it useful for comparing properties on a level playing field.
The Cap Rate Formula
Cap Rate = NOI ÷ Property Value
Where NOI (Net Operating Income) = Gross Rental Income − Operating Expenses
Operating expenses include property taxes, insurance, maintenance, property management fees, utilities (if you cover them), and vacancy allowance. It does not include debt service (mortgage payments) or capital gains.
Example: A $500,000 rental property generates $50,000 in gross annual rent. After $15,000 in operating expenses, NOI is $35,000. The cap rate is $35,000 ÷ $500,000 = 7%.
What Makes a Good Cap Rate?
Cap rates vary dramatically by market. According to recent real estate data, cap rates typically range from 3-8% in strong coastal markets to 8-12% in secondary markets. There's no universal "good" cap rate—it depends on your location, property type, and risk tolerance.
In low-growth markets (coastal cities, strong job markets), cap rates are typically 3-5%. These markets offer appreciation potential and lower vacancy risk, compensating for lower income yields.
In secondary markets (mid-size cities, stable economies), cap rates typically range 6-8%. These offer better immediate returns with moderate appreciation potential.
In high-growth or emerging markets, cap rates can exceed 10%. Higher yields compensate for higher vacancy risk and less predictable appreciation.
A "good" cap rate means the property generates enough income to cover costs while meeting your required return. Most real estate investors target cap rates of at least 5-8%, though this varies by market and strategy.
Cap Rate vs. Cash-on-Cash Return
These are often confused but measure different things. Cap rate uses the full property purchase price. Cash-on-cash return uses only your down payment.
Example: A $500,000 property with $35,000 NOI has a 7% cap rate. If you put down $100,000 (20%), your cash-on-cash return is $35,000 ÷ $100,000 = 35%. The leverage of a mortgage creates a higher cash-on-cash return even though the cap rate stays the same.
This is why cap rates are better for comparing across deals—they remove financing from the equation.
Cap Rate Limitations
Cap rates only measure current income yield. They ignore:
- Appreciation potential: A property in a hot market may have a low cap rate but high appreciation
- Financing impact: Two identical properties can produce different actual returns depending on mortgage terms
- Expense estimates: Cap rates are only as accurate as your NOI assumptions
- Risk variations: Two properties with identical cap rates may have very different vacancy risks
Cap rates are a starting point, not the entire investment decision. Always analyze local market trends, property condition, tenant quality, and your personal investment timeline alongside cap rate.
How Investors Use Cap Rates
Comparing properties: A 7% cap rate in one market can be compared directly to a 7% cap rate anywhere else. This standardization lets you evaluate opportunities across different cities and price points.
Initial screening: Cap rate helps identify which deals might be worth deeper analysis. Deals below your minimum required cap rate can be eliminated quickly.
Valuation check: If you know the local cap rate for a property type, you can estimate its likely purchase price by dividing NOI by the cap rate. If a seller is asking way more than comparable cap rates suggest, it's overpriced.
Tools to Calculate Cap Rate
Use our Cap Rate Calculator to quickly analyze properties. We also offer:
- Rental Property Analyzer — full financial projections
- Real Estate ROI Calculator — compare properties side-by-side
- BRRRR Strategy Calculator — analyze fix-and-flip projects
Frequently Asked Questions
Q: Is a 5% cap rate good? A: It depends on your market. In coastal markets, 5% is above average. In secondary markets, it's below average. Compare against other properties in your target area.
Q: Does cap rate include mortgage payments? A: No. Cap rate uses NOI before any debt service, making it independent of how you finance the property. This lets you compare properties regardless of financing.
Q: What's the difference between gross yield and cap rate? A: Gross yield is annual rent divided by property price. Cap rate is NOI (rent minus expenses) divided by property price. Cap rate is more accurate because it accounts for real costs.
Q: Can cap rate predict appreciation? A: No. Cap rate only measures income. A low-cap-rate property in an appreciating market may still be an excellent investment—just not for income. Research local market trends separately.