Cap Rate Explained: How Real Estate Investors Evaluate a Property's Value

Walk into any commercial real estate conversation and you'll hear cap rate within the first few minutes. It's the industry's shorthand for property value and investment return — but it measures something more specific than most buyers realize, and it can mislead as easily as it informs if you don't understand exactly what it does and doesn't tell you.

What Cap Rate Is

Cap rate (capitalization rate) expresses the relationship between a property's Net Operating Income and its market value as a percentage:

Cap Rate = NOI ÷ Property Value

Or, rearranged to estimate value from income:

Property Value = NOI ÷ Cap Rate

A property generating $80,000 in NOI purchased for $1,000,000 has an 8% cap rate. A property generating the same $80,000 NOI purchased for $1,333,000 has a 6% cap rate.

Cap rate represents the unlevered yield on the property — the return you'd get if you bought it entirely in cash with no financing. It's a pure property metric, independent of how you finance it.

What Cap Rate Measures (and What It Doesn't)

Cap rate measures:

• The income yield of the property relative to its price
• The risk premium investors are requiring for this property type in this market
• Relative value across comparable properties in the same market and asset class

Cap rate does NOT measure:

• Your actual cash return (which depends on financing)
• Total return including appreciation
• Risk of individual tenant default
• Physical condition or deferred maintenance
• Any income or expense item below the NOI line (debt service, taxes, depreciation)

This last point is worth emphasizing: cap rate is calculated on NOI, which is before financing costs. Two investors buying the same property at the same cap rate will have very different actual cash returns if they finance it differently.

How to Calculate Cap Rate Correctly

The calculation is simple; the challenge is using the right NOI.

Step 1: Calculate stabilized NOI
Use a stabilized NOI — not current actuals if the property is between tenants, in lease-up, or has abnormal expenses in the trailing period. Stabilized NOI uses market vacancy (even if current occupancy is higher), market-rate management (even if self-managed), and normalized expenses.

Example property: 8-unit apartment building

• Gross Potential Rent: $144,000 (8 units × $1,500/month)
• 5% vacancy: -$7,200
• Other income: +$3,600
• Operating expenses (taxes, insurance, management, maintenance, reserves): -$58,000
• Stabilized NOI: $82,400

Step 2: Divide by purchase price
$82,400 ÷ $1,030,000 = 8.0% cap rate

High Cap Rate vs. Low Cap Rate: What It Means

This is where cap rate intuition is most important — and most commonly confused.

Higher cap rate = lower price relative to income

• Higher return on the invested capital
• But typically indicates higher risk, less desirable location, or weaker tenant profile
• Example: Class C apartment complex in a tertiary market might trade at 9–10% cap

Lower cap rate = higher price relative to income

• Lower current income return
• But typically indicates lower risk, better location, or stronger tenant profile
• Example: Class A apartment complex in a gateway city might trade at 4–5% cap

Cap rate is a risk-adjusted yield. Investors accept lower yields (lower cap rates) when the investment is perceived as safer or more stable. They require higher yields (higher cap rates) to compensate for additional risk.

Market Cap Rates by Property Type (Approximate)

Cap rates vary by asset class and market. Approximate ranges in current markets (these change constantly — verify with a local broker):

• Class A multifamily, gateway markets: 4.0–5.5%
• Class B multifamily, secondary markets: 5.5–7.0%
• Class C multifamily, tertiary markets: 7.0–9.5%
• Industrial/warehouse: 5.0–6.5%
• Retail (NNN, credit tenant): 5.5–7.0%
• Office: 7.0–9.0%+ (wide range due to remote work uncertainty)
• Hospitality: 8.0–11%+

Cap Rate vs. Cash-on-Cash Return

This is the most practically important distinction. Cap rate is unlevered — it ignores financing. Cash-on-cash return is levered — it reflects actual cash return after paying the mortgage.

Example: $1,000,000 property at 8% cap rate ($80,000 NOI)

All-cash purchase:
NOI: $80,000
No debt service
Cash-on-cash return = 8.0% (same as cap rate)

75% LTV financing at 7.5% interest, 25-year amortization:
NOI: $80,000
Annual debt service: ~$65,900
Cash flow after debt service: $14,100
Cash invested (25% down): $250,000
Cash-on-cash return = $14,100 ÷ $250,000 = 5.6%

The unlevered cap rate is 8%, but the actual cash return on your invested capital is 5.6% — lower than the cap rate because current interest rates are close to the cap rate. This is called negative leverage — when debt costs exceed the cap rate, financing reduces your return.

The Cap Rate / Interest Rate Relationship

When interest rates are well below cap rates, leverage amplifies returns (positive leverage). When interest rates approach or exceed cap rates, leverage reduces returns (negative leverage).

In rising rate environments, this dynamic is critical: cap rates and interest rates may converge, reducing the benefit of leverage and potentially making all-cash or low-leverage acquisitions more attractive than highly leveraged ones.

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