Cap Rate Explained: Formula, Examples, and How It Prices Real Estate

A cap rate (capitalization rate) is the single most-used shorthand in real estate: net operating income divided by property value. It compresses a property's entire risk and return profile into one number, and it's the tool investors, brokers, and appraisers use to price income property, compare deals across markets, and gut-check whether an asking price makes sense. This guide covers the formula, how market cap rates set property values, going-in vs. exit cap rates, what actually drives them up and down, and - critically - where the cap rate stops telling you the whole story.

Every income-producing property - an apartment building, an office tower, a strip mall, a self-storage facility - gets priced the same way: investors look at what it earns (net operating income) and apply a yield (the cap rate) the market currently demands for that kind of risk. Move the cap rate by half a point and a $5 million property is suddenly worth $400,000 more or less, with nothing about the building itself having changed. Understanding what a cap rate is, and is not, is the difference between pricing a deal and guessing at one.

The Cap Rate Framework: One Ratio, Two Uses - Pricing and Risk Comparison

What Is a Cap Rate?

The capitalization rate is the unlevered yield a property throws off in its first year of ownership, before financing. It answers one question: if you paid cash for this property today, what percentage return would the income alone generate?

Cap Rate = Net Operating Income (NOI) / Property Value (or Purchase Price)

Because it's calculated before debt service, depreciation, and capital expenditures, the cap rate strips out how a specific buyer chooses to finance a deal and leaves only the property's raw operating yield. That's what makes it so useful for comparison: a levered cash-on-cash return depends on your loan terms, but two buyers looking at the same building with the same NOI will calculate the same cap rate regardless of how either one finances it.

Cap rates move inversely with price. A lower cap rate means investors are willing to accept a smaller yield for the income stream - usually because they see the asset as lower-risk, in a stronger market, or with more upside - which pushes the price up. A higher cap rate means investors demand more yield for the same income, which pushes the price down. This is the same inverse relationship bond investors know between yield and price, applied to real estate.

The Cap Rate Formula, Worked

Take a 40,000-square-foot grocery-anchored retail center listed at $5,000,000 with a projected Year 1 NOI of $350,000.

// Going-in cap rate
= NOI / Purchase_Price
= 350000 / 5000000
= 7.0%

That 7.0% is the property's unlevered, first-year yield - the return you'd earn on an all-cash purchase before any mortgage, before any appreciation, and before any NOI growth.

Using Cap Rate to Price a Property

Flip the formula and the cap rate becomes a pricing tool. If you know the NOI and you know what cap rate the market is paying for comparable assets, you can solve for value directly:

// Value from NOI and a market cap rate
= NOI / Market_Cap_Rate

Suppose three grocery-anchored centers sold in the same submarket over the last six months at an average 6.75% cap rate. Apply that market cap rate to our subject property's $350,000 NOI:

Implied Value = $350,000 / 6.75% = $5,185,185

The property is listed at $5,000,000 but comps suggest it should trade closer to $5,185,185 - the asking price is roughly 3.6% below where the market is currently pricing similar income. That gap is exactly what a cap rate analysis is for: it turns "does this feel like a good price?" into a number you can defend.

Why Small Cap Rate Moves Are Large Dollar Moves

Because value is NOI divided by a rate, and cap rates are small percentages, tiny shifts in the rate produce large swings in value. Holding NOI fixed at $350,000:

Moving from a 5.5% to an 8.0% cap rate - a swing that can happen across a single interest-rate cycle - cuts nearly $2 million (30%) off the value of a property whose income never changed. This is why cap rate assumptions, especially the exit cap rate on a multi-year hold, deserve as much scrutiny as your revenue or expense projections.

Going-In Cap Rate vs. Exit (Terminal) Cap Rate

Every hold-period analysis uses two different cap rates, and conflating them is one of the most common modeling errors in real estate:

• Going-in cap rate: Year 1 NOI divided by the purchase price. It tells you the yield you're buying at.
• Exit (terminal) cap rate: applied to the forward NOI (the year after your final year of ownership) to estimate the sale price when you model the eventual disposition.

Continuing the retail center example - 7.0% going-in cap rate, 3% annual rent growth passed through to NOI, a 5-year hold, and a conservative exit cap rate 25 basis points wider than the going-in rate (7.25%):

Exit Value = Year 6 (Forward) NOI / Exit Cap Rate
Exit Value = $395,993 / 7.25% = $5,461,971

After 3% selling costs (~$163,859), net sale proceeds come to roughly $5,298,112. Notice the deliberate conservatism: the exit cap rate (7.25%) is higher than the going-in cap rate (7.0%), meaning the model assumes the market pays slightly less per dollar of NOI at exit than it did at purchase. Underwriting the opposite - assuming cap rate compression you don't control - is one of the fastest ways to talk yourself into an overpriced deal.

What Actually Moves Cap Rates

Cap rates aren't set by any single formula - they're a market-clearing price for risk, set the same way bond yields are. Four forces dominate:

1. Interest rates. Cap rates and the risk-free rate move together over time (with a lag). When the 10-year Treasury yield rises, buyers demand more spread over their cost of debt, which pushes cap rates up and property values down. When rates fall, the reverse happens.
2. Perceived risk. Tenant credit quality, lease term, location, and asset condition all factor in. A single-tenant property leased to an investment-grade credit for 15 years trades at a materially lower cap rate than a half-vacant building with month-to-month tenants.
3. Growth expectations. Markets and asset classes with strong rent-growth prospects (think Sun Belt multifamily in an in-migration cycle) command lower cap rates because investors are willing to accept less income today for more income tomorrow.
4. Property type and location. Core, stabilized assets in gateway markets trade at the tightest (lowest) cap rates; higher-risk asset classes and secondary/tertiary markets trade wider.

Illustrative cap rate ranges across property types, from tightest to widest (actual rates vary by market cycle, submarket, and asset quality - always underwrite from real, recent comps, not from a table like this one):

Cap Rate Compression and Expansion

Compression describes a period when cap rates fall - buyers accept lower yields, and values rise for the same NOI. Compression typically happens when interest rates fall, capital floods into an asset class, or investor sentiment turns bullish on a sector's growth. Expansion is the reverse: cap rates rise, values fall, usually driven by rising rates, tightening credit, or a deteriorating outlook for the asset class.

The practical modeling implication: never underwrite compression as your base case. A property bought at a 6.0% cap rate that you assume sells at a 5.5% cap rate five years later is betting on a friendlier market than the one you're buying into - a bet you don't control and shouldn't need to win to hit your return target. Flat or modestly wider exit cap rates (as in the 7.0% → 7.25% example above) are the industry-standard conservative assumption.

Cap Rate vs. Discount Rate vs. IRR

These three get confused constantly, and they measure different things:

• Cap rate is a single-year, unlevered snapshot: this year's NOI divided by value. It says nothing about how NOI, financing, or value change over a hold period.
• Discount rate is the rate used to bring a stream of future cash flows back to present value - it reflects the time value of money and the risk of those specific cash flows, and it's an input to a DCF, not an output of one.
• IRR is the annualized, levered (or unlevered) return across an entire hold period, accounting for the timing and size of every cash flow, including the sale. It's an output of a full cash-flow model, not a single ratio.

A cap rate can tell you today's price is reasonable. It cannot tell you whether a 5-year hold with debt, rent growth, and a future sale will hit your 15% IRR target - that requires the full pro forma. (For the mechanics of discounting a full cash-flow stream, see our guide to NPV vs IRR.)

Cap Rate vs. Cash-on-Cash Return: The Leverage Question

The cap rate is unlevered. Most real buyers use debt, and once you do, your actual cash yield depends on the loan constant - the annual debt service divided by the loan amount - not just the interest rate.

Financing the $5,000,000 retail center at 65% LTV, 6.75% interest, 25-year amortization:

// Annual debt service via PMT
= -PMT(Rate/12, Years*12, Loan_Amount) * 12
= -PMT(6.75%/12, 300, 3250000) * 12
= $269,455

The loan constant is the annual debt service divided by the loan amount:

Loan Constant = Annual Debt Service / Loan Amount
Loan Constant = $269,455 / $3,250,000 = 8.29%

Here's the test that determines whether leverage helps or hurts you: compare the going-in cap rate to the loan constant, not to the interest rate.

Going-In Cap Rate (7.0%) < Loan Constant (8.29%) → Negative Leverage

Even though the 6.75% interest rate is below the 7.0% cap rate, the loan constant (8.29%) - which bakes in principal amortization, not just interest - is higher than the cap rate. That's negative leverage: debt is diluting the levered return relative to the unlevered yield.

The 4.35% cash-on-cash return sits below the 7.0% unlevered cap rate - direct evidence of the negative leverage the loan constant test predicted. This is a normal, financeable deal (a 1.30x DSCR comfortably clears most lenders' 1.20x–1.25x minimum), but it's a reminder that "the interest rate is lower than the cap rate" is not, by itself, proof that leverage is working for you.

Full 5-Year Return Picture

Running the same deal through the 5-year hold - NOI growing at 3% annually, level debt service, and a sale at a 7.25% exit cap rate net of 3% selling costs and the remaining loan balance (~$2,953,141 after 5 years of amortization) - produces:

// IRR across the full cash-flow stream (Year 0 to Year 5)
= IRR(B2:B7)

• Levered IRR: ~9.65%
• Equity Multiple (MOIC): ~1.53x
• Average Cash-on-Cash (Years 1–5): ~5.3%

A 7.0% going-in cap rate with negative leverage still produces a financeable, ~9.65% IRR deal once rent growth and the eventual sale are included - the point being that the cap rate is a useful entry snapshot, not the final word on your return.

Common Mistakes to Avoid

1. Treating cap rate as a return metric. It's a single-year yield, not an IRR. It ignores financing, hold period, and NOI growth entirely.
2. Underwriting cap rate compression at exit. Assuming you'll sell at a lower cap rate than you bought is a bet on the market, not the deal. Default to flat or wider.
3. Comparing interest rate to cap rate instead of loan constant to cap rate. The interest-rate comparison ignores amortization and will overstate how much leverage is helping you.
4. Using stale or thin comps. A cap rate pulled from one dated sale, or from a different asset class or market tier, will misprice your subject property. Use recent, similar transactions.
5. Applying a market cap rate to an inflated pro forma NOI. If the NOI used to derive value assumes rents pushed to market or expenses trimmed unrealistically, the resulting "value" is fiction. Cap rate the NOI you can actually underwrite.
6. Ignoring the property-type and location context. An 8% cap rate is normal for hospitality and expensive for Class A multifamily. Cap rates are only comparable within a like-for-like risk bucket.