Cap Rate vs NOI Explained
Cap rate and NOI are the two most referenced metrics in commercial real estate — and they're directly connected. Here's how they relate, where they differ, and why you need both.
The relationship between cap rate and NOI
Cap rate and NOI aren’t competing metrics — they’re two parts of the same equation. NOI is the income number; cap rate is the ratio that connects income to value. You can’t calculate one without the other, and misunderstanding either leads to flawed deal analysis.
The formula ties them together: Cap Rate = NOI ÷ Price. Rearranged: Price = NOI ÷ Cap Rate. And: NOI = Price × Cap Rate. These three versions of the same equation are the foundation of every commercial real estate valuation.
NOI
Net operating income
- What it measures
- The property's annual operating income after expenses
- Expressed as
- A dollar amount
- Determined by
- Rent roll, occupancy, and operating expenses
- Changes when
- Revenue or expenses change
- Controlled by
- Property operations, leasing, and management
Cap rate
Capitalization rate
- What it measures
- The return rate relative to the price
- Expressed as
- A percentage
- Determined by
- NOI and purchase price (or market value)
- Changes when
- NOI, price, or market sentiment changes
- Controlled by
- Operations (via NOI) and market forces (via pricing)
How NOI drives cap rate (and vice versa)
If you increase NOI while the price stays constant, cap rate goes up. You’re getting more income per dollar invested. This is the value-add playbook: buy a property, improve operations (fill vacancies, raise rents, cut costs), grow NOI, and the cap rate based on your purchase price improves.
Conversely, cap rate determines value through NOI. If you know a market trades at a 6.5% cap rate and your property generates $500,000 in NOI, the implied value is $500,000 ÷ 0.065 = $7,692,308. If you grow NOI to $575,000 at the same cap rate, value increases to $8,846,154 — a $1.15 million value increase from $75,000 in additional NOI.
This multiplier effect is why even small NOI improvements create outsized value gains. At a 6% cap, every $1 of additional NOI creates $16.67 of additional value. At a 7% cap, it’s $14.29. This math is the core thesis of every commercial real estate acquisition.
Example: how changes in NOI impact cap rate and value
| Scenario | NOI | Price | Cap rate |
|---|---|---|---|
| At purchase (in-place) | $400,000 | $5,714,286 | 7.0% |
| After lease-up (stabilized) | $480,000 | $6,857,143 | 7.0% |
| NOI growth + cap compression | $480,000 | $7,384,615 | 6.5% |
This example shows a property purchased at a 7.0% cap with $400,000 NOI for $5.71M. After stabilization, NOI grows to $480,000. At the same 7.0% cap rate, the value increases to $6.86M — a $1.14M gain from operations alone.
If the market also compresses cap rates to 6.5% during the hold period, the same $480,000 NOI implies a value of $7.38M. The investor benefits from both NOI growth and cap rate compression — the two engines of commercial real estate returns.
When to focus on NOI vs cap rate
Focus on NOI when you’re evaluating a property’s operating performance, underwriting a rent roll, projecting cash flows, or calculating DSCR. NOI tells you what the property actually earns. It’s the number you can directly influence through leasing, expense management, and capital improvements.
Focus on cap rate when you’re pricing an acquisition, benchmarking against comparable sales, evaluating your exit strategy, or assessing how market conditions might affect property values. Cap rate is a market-driven metric that reflects investor sentiment, interest rates, and risk perception.
The best underwriting analyses use both. NOI tells you the truth about the property’s income. Cap rate tells you the truth about the market’s pricing. Together, they give you a complete picture of value and return potential.
Frequently asked questions
Is cap rate or NOI more important?
Neither is more important — they serve different purposes. NOI tells you what the property earns; cap rate tells you how the market prices that income. You need both for a complete analysis. NOI without cap rate doesn't tell you if the price is fair. Cap rate without understanding the NOI composition doesn't tell you if the income is sustainable.
Can you have a high NOI and a low cap rate?
Absolutely. A property with $2M in NOI priced at $40M has a 5% cap rate. The NOI is high in absolute terms, but relative to the price, the return rate is modest. This is typical of institutional-quality assets in primary markets — high income, high price, low cap rate.
If NOI increases, does cap rate change?
It depends on whether the price also changes. If NOI increases and you're calculating cap rate on your original purchase price, your yield (going-in cap rate) improves. But if the market reprices the property higher to reflect the new NOI, the market cap rate may stay the same while the value increases.
What's the difference between going-in and stabilized cap rate?
Going-in cap rate uses current in-place NOI divided by purchase price. Stabilized cap rate uses projected NOI at full occupancy and market rents. The spread between them indicates how much value-add upside a deal offers.
Final thoughts
Cap rate and NOI are two sides of the same coin. NOI is the property’s financial reality; cap rate is the market’s interpretation of that reality. Understanding how they interact — and how changes in one affect the other — is the foundation of every commercial real estate investment decision.
Related guides
What is cap rate?
Complete guide to the cap rate metric.
What is NOI?
Deep dive into net operating income.
What is a good cap rate?
Current benchmarks by asset class.
How to calculate cap rate
Step-by-step calculation guide.
Cap rate formula, example and calculator
Worked deals plus the reverse formula for valuation.
What is a rent roll?
The document NOI is actually derived from.
NOI is the reality. Cap rate is the price of it.
DealWise AI derives NOI from your rent roll lease by lease, then reports the going-in cap rate those leases actually support. Free to start.