Cap Rate Explained: What It Is, How It Works, and Beginner Mistakes
Understand cap rates in commercial real estate: definition, formula, examples, what affects cap rates, and why cap rate alone can mislead beginners.
What Is a Cap Rate?
Cap rate (capitalization rate) is a quick way to relate a property’s NOI to its price.
Cap Rate = NOI ÷ Purchase Price
Example:
NOI = $200,000
Price = $3,000,000
Cap rate = 6.67%
Cap rate is most useful for:
quick comparisons
rough valuation
understanding market pricing
But it’s not the full story.
Why Cap Rates Exist (And Why Beginners Overuse Them)
Cap rates are popular because they’re simple.
But simplicity can hide risk.
Cap rate does not directly account for:
financing terms
capital expenditures (capex)
lease rollover risk
tenant quality
required tenant improvements/commissions
near-term vacancies
A “higher cap rate” might mean “higher return”… or it might mean “higher risk.”
What Actually Moves Cap Rates?
Think of cap rates as a market “pricing multiple” influenced by:
1) Interest Rates and Debt Markets
When borrowing costs rise, buyers often pay less (cap rates may expand).
When borrowing costs fall, buyers may pay more (cap rates may compress).
2) Property Risk (Tenant & Lease Quality)
Long leases with strong tenants often trade at lower cap rates
Short leases, weak tenants, or uncertain demand often trade at higher cap rates
3) Location & Demand Drivers
Assets in strong, liquid markets tend to have lower cap rates than assets in thin or declining submarkets.
4) Asset Quality & CAPEX Needs
A building with a looming roof replacement should not be valued like a fully renovated building—capex effectively reduces what you can “really” pay.
5) Property Type Dynamics (Blend View)
Industrial often commands strong demand in many markets
Retail varies massively by tenant quality and location
Multifamily 5+ often trades differently due to depth of buyer pool
Mixed-use can be harder to finance/price due to complexity
Cap Rate Examples Across a Blended Portfolio
Example A: Retail Strip (Higher cap can = more risk)
NOI: $250,000
Price: $3,125,000
Cap: 8.0%
But: 1 major tenant expires in 18 months and pays below-market rent.
If they leave, NOI could drop hard.
Example B: Small-Bay Industrial (Moderate cap, durable demand)
NOI: $250,000
Price: $3,846,000
Cap: 6.5%
But: multiple tenants = diversified risk, simpler buildouts.
Example C: Mixed-Use (Cap rate hides capex and management complexity)
NOI: $250,000
Price: $3,571,000
Cap: 7.0%
But: residential turns + retail TI can add hidden costs.
Lesson: cap rate alone won’t tell you which is “better.”
Cap Rate vs Cash-on-Cash (Common Beginner Confusion)
Cap rate assumes an all-cash purchase (NOI vs price).
Cash-on-cash depends on your financing (cash flow vs cash invested).
You can buy:
a 6% cap deal with great financing and strong cash-on-cash
or an 8% cap deal with weak financing and weak cash-on-cash
Beginner rule: Use cap rate for market context, and cash-on-cash for “what do I earn on my money?”
Cap Rate vs IRR (Why Time Matters)
IRR reflects:
cash flow over time
value growth
sale proceeds
timing of money
A deal with low initial cap rate can still produce strong IRR if:
NOI grows meaningfully (value-add)
you refinance
the asset becomes more stable and sells at a better “multiple”
The 5 Beginner Mistakes with Cap Rates
Mistake 1: Treating cap rate as “return”
Cap rate is not your return—your financing and capex determine actual investor returns.
Mistake 2: Using pro forma NOI to claim a “cheap cap”
Beginners often calculate cap rate on projected NOI and assume it’s real.
Use in-place NOI for honest pricing. Use pro forma for potential, with costs.
Mistake 3: Ignoring lease rollover
A high cap rate might simply mean the market expects tenant churn.
Mistake 4: Ignoring capex
If you need $300,000 in near-term capex, your “real basis” is higher than the purchase price.
Mistake 5: Assuming your exit cap equals today’s cap
Underwrite conservatively: often assume a slightly higher exit cap to protect downside.
Quick Valuation: Value = NOI ÷ Cap Rate
This is the classic cap rate valuation method:
NOI = $300,000
Cap rate = 7.5%
Value ≈ $4,000,000
But beginners should always ask:
How durable is that NOI?
How much capex is needed to maintain it?
How much leasing cost is needed to keep it?
Beginner Cap Rate Checklist
When someone says “it’s a 7 cap,” ask:
Is that NOI in-place or pro forma?
Does NOI include realistic vacancy?
Are expenses normalized (taxes/insurance)?
What capex is required in the first 24 months?
How much lease rollover risk exists?
What’s a conservative exit cap assumption?
FAQs
What is a good cap rate?
Depends on market, asset quality, tenant risk, and growth. Higher can mean risk.
Why do cap rates change?
Rates, risk sentiment, market demand, and asset fundamentals.
Should beginners only buy high cap rate deals?
No—buy deals where you understand the business plan and risks. Clarity beats “cheap.”
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