The Definition
The capitalization rate — universally called the "cap rate" — is the foundational metric of commercial real estate investing. It answers one question: if you paid all cash for this property today, what annual return would you earn from the income it generates?
Net Operating Income (NOI) is the property's annual income after all operating expenses are paid, but before debt service (mortgage payments). That last part is critical: cap rate ignores financing entirely. It's a pure measure of property performance — which is exactly why it's so useful for comparing deals across different buyers with different financing arrangements.
Whether you're a cash buyer, a 25%-down conventional borrower, or assuming a seller's existing loan, the cap rate is the same. It's the apples-to-apples metric of commercial real estate.
How to Calculate a Cap Rate — Worked Example
Let's walk through a real-world example: an 8-unit multifamily property in Hartford, CT.
📍 8-Unit Multifamily — Hartford, CT
Gross Rental Income (annual)
$96,000
Vacancy Allowance (5%)
− $4,800
Effective Gross Income
$91,200
Operating Expenses (taxes, insurance, maintenance, management)
− $28,000
Net Operating Income (NOI)
$63,200
Purchase Price
$875,000
Cap Rate ($63,200 ÷ $875,000 × 100)
7.23%
A 7.23% cap rate on a Hartford multifamily sits solidly within the CT multifamily range of 5.5–7.0% — actually slightly above the top of the range, which is a positive signal. In NDI's scoring model, this deal would earn a strong cap rate score.
What Goes Into Operating Expenses?
Operating expenses typically include:
- Property taxes
- Property insurance
- Property management fees (typically 8–10% of collected rent)
- Routine maintenance and repairs
- Landscaping, snow removal, common area utilities
- Reserves for replacement (capital expenditure reserves)
What does NOT go in: mortgage payments, depreciation, income taxes. These are below-the-line items that don't affect NOI or cap rate.
What's a Good Cap Rate? By Property Type in the Northeast
"Good" is relative — a cap rate that's exceptional in one market is below-average in another. Here are current Northeast benchmarks by property type, updated March 2026:
| Property Type |
Northeast Range |
Strong Buy Signal |
Notes |
| Industrial (CT) |
7.0–8.5% |
Below 7.5% |
I-91/I-95 corridor strongest |
| Multifamily 5+ (CT) |
5.5–7.0% |
Below 6.5% |
Fairfield County lower due to premium pricing |
| Retail NNN |
6.5–8.0% |
Below 7.0% |
Credit tenant critical; check WALT |
| Office (CT) |
7.5–9.5% |
Very selective |
Distressed market; high cap ≠ good deal here |
| Industrial (NJ) |
5.5–7.0% |
— |
Highly compressed; tight underwriting required |
| Multifamily (NYC Metro) |
4.5–6.0% |
— |
Value-add focus required at these yields |
| Industrial (MA) |
6.0–7.5% |
— |
Worcester corridor emerging opportunity |
| Industrial (PA) |
5.5–7.0% |
— |
Lehigh Valley compressed; Pittsburgh higher |
| Multifamily (PA) |
5.0–6.5% |
— |
Philadelphia strong; suburban PA value play |
Important caveat on office: A 9.5% cap rate on a distressed CT office building is not necessarily a great deal — high cap rates in a structurally challenged sector can signal a value trap, not a value-add opportunity. Context always matters.
Cap Rate vs. Cash-on-Cash Return
These two metrics measure different things, and confusing them is one of the most common mistakes in commercial real estate underwriting.
Cap rate ignores financing completely. It tells you the property's income yield as if purchased with all cash.
Cash-on-cash return accounts for your actual financing. It measures the cash income you receive relative to the cash you invested (down payment + closing costs).
Here's how leverage changes the picture:
- Property: 7.5% cap rate, purchased for $1,000,000
- NOI: $75,000
- Financing: 75% LTV at 6.5% interest (30-year amortization)
- Annual debt service: ~$56,800
- After-debt cash flow: $75,000 − $56,800 = $18,200
- Cash invested (25% down + closing): ~$265,000
- Cash-on-cash return: ~6.9%
In this scenario, leverage actually reduces your cash-on-cash below the cap rate because the interest rate (6.5%) is relatively close to the cap rate (7.5%). The spread between cap rate and debt cost is called "positive leverage." When cap rates compress below borrowing costs, leverage becomes negative — a critical risk consideration in today's rate environment.
Use cap rate for comparing deals. Use cash-on-cash for evaluating your actual return given your specific financing.
How Cap Rates Reflect Market Risk
Cap rates are a proxy for risk and demand in a market. Understanding this relationship is essential for reading the signals correctly.
Higher cap rate = higher perceived risk OR lower demand. When a market has fewer buyers competing for deals — whether due to geography, asset class stigma, or structural challenges — prices stay lower relative to income, and cap rates remain elevated. CT industrial at 7.5% exists partly because the pool of institutional buyers is smaller than in New Jersey or Boston.
Lower cap rate = more competition, lower yields, often primary markets. NYC multifamily at 5% doesn't reflect a "better" deal — it reflects an enormous pool of capital chasing limited supply in the most liquid market in the country. Buyers accept lower current yields in exchange for appreciation potential and liquidity.
This is why a CT industrial deal at 7.5% cap and an NYC multifamily deal at 5.0% cap can both be good deals — they serve different investor profiles and risk appetites. The CT industrial buyer is prioritizing income yield; the NYC buyer is prioritizing capital preservation and liquidity.
The Risk Hierarchy in Northeast Markets
From lowest cap rates (most competition, lowest perceived risk) to highest:
- NYC Gateway assets (multifamily, industrial near ports)
- NJ industrial (I-95/I-78 corridor logistics)
- Boston/Cambridge (life science, multifamily)
- Fairfield County, CT (NYC commuter premium)
- Hartford Metro, New Haven (strong fundamentals, less institutional competition)
- Eastern CT, Western MA, suburban PA (highest yields, least competition)
How NDI Uses Cap Rates in Deal Scoring
Cap rate performance versus submarket average is 30% of the NDI deal scoring rubric — the single largest weighting factor. Here's how it works:
- Every deal is compared to the current submarket average cap rate for that property type in that specific market
- A deal at 9.8% cap in a 5.5–7.0% multifamily market scores much higher on this dimension than a 6.2% cap in the same market
- Deals above submarket average get the highest cap rate scores; deals at or below average score proportionally lower
- We track and update submarket averages quarterly based on transaction data
Combined with price/SF vs. comparable sales (25% weight), location fundamentals (20%), value-add potential (15%), and 1031 suitability (10%), this gives every deal a 1–10 score. Scores of 7+ make the daily alert; scores of 9–10 get flagged as exceptional.
See cap rate benchmarks in action across Connecticut, Massachusetts, New Jersey, and New York.
Common Mistakes When Using Cap Rates
1. Using Asking Price Instead of Your Purchase Price
A seller may advertise a "7.8% cap rate" based on the asking price. If you negotiate a 5% discount, your actual cap rate improves. Always calculate cap rate at the price you're actually paying — never trust the seller's headline number without verification.
2. Accepting Seller-Reported NOI Without Normalizing
Sellers routinely underreport management costs (especially if they self-manage), exclude reserves, or boost NOI with one-time income items. Always re-underwrite the income and expenses using market-rate assumptions. A property "managed for free" by the seller should have a 10% management fee added back in your underwriting.
3. Ignoring Vacancy
A 100% occupied building is a snapshot, not a projection. If the market vacancy for that property type is 7%, you should underwrite 7% vacancy — even if the building is full today. Underwriting with 0% vacancy on a stabilized asset inflates NOI and understates cap rate risk.
4. Comparing Cap Rates Across Different Markets
A 6% cap on a Hartford industrial property is not the same risk/reward as a 6% cap on a NYC warehouse. The markets have different liquidity, appreciation potential, and tenant demand dynamics. Cap rate comparisons are most meaningful within the same submarket and property type.
5. Ignoring the Lease Structure
A 7.5% cap rate on a gross-lease building (landlord pays all expenses) is fundamentally different from 7.5% on a NNN building (tenant pays expenses). As expenses rise, the gross-lease cap rate erodes. The NNN cap rate is insulated. Always understand what the landlord is actually netting.
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Frequently Asked Questions
What is a cap rate in real estate?
A cap rate (capitalization rate) is the ratio of a property's Net Operating Income to its purchase price, expressed as a percentage. It represents your annual return if you bought the property with all cash. Formula: Cap Rate = NOI / Purchase Price × 100. It's the most widely used metric for comparing commercial real estate deals.
How do you calculate a cap rate?
Step 1: Calculate gross rental income. Step 2: Subtract vacancy (typically 5–10%). Step 3: Subtract all operating expenses (taxes, insurance, maintenance, management fees). Step 4: The result is NOI. Step 5: Divide NOI by purchase price and multiply by 100. Example: $63,200 NOI ÷ $875,000 price = 7.23% cap rate.
What is a good cap rate for commercial real estate?
"Good" depends on market and property type. In the Northeast: CT industrial 7.0–8.5% (strong buy below 7.5%); CT multifamily 5.5–7.0% (strong buy below 6.5%); retail NNN 6.5–8.0%; NYC multifamily 4.5–6.0%. The key is comparing the deal's cap rate to the submarket average for that specific property type.
What's the difference between cap rate and yield?
Cap rate uses NOI (after expenses) divided by purchase price. Gross yield uses gross income (before expenses) divided by price — inflating the apparent return. Cap rate is the more reliable comparison metric because it accounts for actual operating costs. Never compare a gross yield to a cap rate directly.
What is cap rate compression?
Cap rate compression happens when prices rise faster than income — cap rates decline. NJ industrial compressed from ~7.5% to 5.5–6% as institutional capital flooded the market. Compressed markets offer lower current yields but potentially higher appreciation. When buying in a compressed market, underwrite conservatively and have a clear exit.
Why are industrial cap rates higher than multifamily?
CT industrial at 7.0–8.5% vs. NYC multifamily at 4.5–6.0% reflects the difference in investor demand and liquidity. NYC multifamily attracts enormous institutional capital, compressing yields. CT industrial has strong fundamentals but a smaller buyer pool — meaning more opportunity for individual investors who know the market.
How can I improve NOI on a commercial property?
To improve NOI: raise rents to market rates (if currently below-market); reduce vacancy through better marketing or tenant retention; cut controllable expenses with competitive bids on insurance and maintenance contracts; add income streams (parking, storage, cell tower leases, laundry). Even modest NOI improvements dramatically increase value when capitalized at market rates.
Does financing affect cap rate?
No — cap rate is calculated before financing and ignores debt entirely. A 7.5% cap rate is the same whether you pay cash or put 25% down. However, financing heavily affects cash-on-cash return. If your borrowing cost (6.5%) approaches your cap rate (7.5%), leverage provides minimal benefit and negative leverage is a real risk if rates rise.
What is a good cap rate for Connecticut commercial real estate?
In Connecticut: industrial 7.0–8.5% (strong buy below 7.5% along I-91/I-95); multifamily 5+ units 5.5–7.0% (strong buy below 6.5%); retail NNN 6.5–8.0%; office 7.5–9.5% (distressed market, proceed carefully). NDI tracks these submarket averages and flags every deal that outperforms the benchmark.
What is a good cap rate for NNN properties?
NNN cap rates vary by tenant credit quality. Investment-grade nationals (Walgreens, Dollar General, CVS, McDonald's) trade at 5.5–7.0%. Regional credit tenants: 7.0–8.5%. Local single-tenant NNN: 8%+. Always match the cap rate to the credit risk — don't pay investment-grade pricing for a weak local tenant, and don't dismiss a local tenant if the cap rate appropriately compensates for the risk.
How does NDI use cap rates to score deals?
Cap rate vs. submarket average carries 30% weight in the NDI deal scoring rubric — the single largest factor. We track submarket averages by property type across all 9 Northeast states and compare every new listing. A deal trading significantly above submarket average scores highest on this dimension; a deal at or below average scores proportionally lower.
What common mistakes do investors make with cap rates?
Top mistakes: (1) Using asking price instead of your actual offer price; (2) Accepting seller-reported NOI without normalizing for management costs and reserves; (3) Underwriting with 0% vacancy when market vacancy exists; (4) Comparing cap rates across different markets without adjusting for risk; (5) Confusing cap rate with cash-on-cash return; (6) Ignoring lease structure — gross vs. NNN delivers very different actual NOI.
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