Cap rate is easiest to understand through examples rather than formula alone. Below are several illustrative, hypothetical scenarios using round numbers to show how the calculation plays out across different property types and situations. None of these figures represent real properties or current market data — they're built purely to demonstrate the mechanics.
Example 1: Single-Family Rental (Illustrative)
- Market value: $220,000
- Annual gross rent: $24,000
- Vacancy/credit loss (5%): -$1,200
- Operating expenses (taxes, insurance, maintenance, management): -$8,800
- NOI: $14,000
Cap Rate = $14,000 ÷ $220,000 = 6.4%
Example 2: Small Multifamily (Illustrative)
A four-unit building often shows a different profile than a single-family rental because expenses scale differently:
- Market value: $480,000
- Gross annual rent (4 units): $57,600
- Vacancy allowance (7%): -$4,032
- Operating expenses: -$21,000
- NOI: $32,568
Cap Rate = $32,568 ÷ $480,000 = 6.8%
Example 3: Before and After a Value-Add Renovation (Illustrative)
This shows why cap rate rises when you increase NOI without a matching increase in what you paid:
Before renovation: Purchase price $180,000, NOI $10,800 → Cap Rate = 6.0%
After renovation: The investor spends $20,000 on updates that allow rents to increase, raising NOI to $15,000, while the property is now worth $210,000 based on the improved income.
Cap Rate = $15,000 ÷ $210,000 = 7.1%
Note that the cap rate on cost — using the original purchase price plus renovation spend ($200,000) instead of the new market value — would be $15,000 ÷ $200,000 = 7.5%, a figure investors often use specifically to judge whether the renovation dollars were well spent.
Example 4: Comparing Two Properties Side by Side (Illustrative)
| Property A | Property B | |
|---|---|---|
| Market Value | $300,000 | $300,000 |
| NOI | $21,000 | $16,500 |
| Cap Rate | 7.0% | 5.5% |
On paper, Property A looks like the stronger investment. But Property A's higher NOI might come from an older roof and deferred maintenance that hasn't hit the expense line yet, or from a rougher neighborhood where tenants turn over more often. Cap rate tells you what the numbers say today — it doesn't tell you why they're different.
What These Examples Illustrate
Across all four scenarios, the mechanics never change — NOI divided by value — but the number by itself doesn't explain risk, condition, or financing. A higher cap rate isn't automatically the better deal, and a lower one isn't automatically safer. For a full explanation of the formula's inputs, see cap rate formula, and for the broader concept and its limitations, see cap rate.