How to Calculate Cap Rate on a Rental Property (US Guide)
Learn the exact formula for capitalization rate, when to use it, and how US investors apply it to evaluate rental properties in 2026.
To calculate cap rate on a rental property, divide the annual Net Operating Income (NOI) by the property's current market value, then multiply by 100. If a property generates $18,000 in NOI per year and is valued at $240,000, the cap rate is 7.5%. Cap rate is the most widely used metric for comparing investment properties because it measures return independent of financing.
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What Is Cap Rate?
Capitalization rate (cap rate) is the return a property would generate if purchased with 100% cash — no mortgage, no financing. It tells you how efficiently the property converts its value into income.
Formula:
Cap Rate = (Annual Net Operating Income / Property Value) × 100
Annual Net Operating Income = Gross rental income minus vacancy minus all operating expenses (taxes, insurance, maintenance, management, HOA, utilities). It does NOT include mortgage payments.
Property Value = Current market value, not your purchase price. If you bought a property two years ago for $180,000 and it's now worth $240,000, you use $240,000 to calculate the current cap rate.
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Step-by-Step Cap Rate Calculation
Step 1: Calculate Annual Gross Rental Income
Add up all rent collected in a year. For a single-family home renting at $1,600/month:
$1,600 × 12 = $19,200 annual gross rent
Step 2: Subtract Vacancy
Budget 8% for vacancy (approximately one month per year):
$19,200 × 0.08 = $1,536 vacancy
Effective Gross Income = $19,200 - $1,536 = $17,664
Step 3: Subtract Operating Expenses
Expense Annual Amount
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Property taxes (0.9% of $240K) $2,160
Insurance $2,400
Maintenance (1% of value) $2,400
CapEx reserve $1,800
Property management (8%) $1,413
Total Operating Expenses $10,173
Step 4: Calculate NOI
NOI = $17,664 - $10,173 = $7,491
Step 5: Calculate Cap Rate
Cap Rate = ($7,491 / $240,000) × 100 = 3.12%
That's a low cap rate. At $240,000, this property delivers a 3.12% unleveraged return. Many investors in appreciation markets accept this — but for cash flow investors, this is too thin.
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What Is a Good Cap Rate?
Cap rate thresholds vary by market, property type, and investor strategy:
Cap Rate Assessment
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Under 4% Appreciation play — typical in high-cost coastal markets
4-6% Moderate — most Class A suburban markets
6-8% Strong cash flow — target for BRRRR/buy-and-hold
8-10% High yield — often C-class neighborhood or distressed
10%+ Verify the numbers — may reflect high vacancy or deferred maintenance risk
For investors in PincerPro's core ICP markets (FL, TX, TN, GA, AZ, OH, NC), targeting 6-8% cap rates on stabilized properties is the right benchmark in 2026.
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Cap Rate vs. Purchase Price: Why the Relationship Matters
Cap rate is inversely related to price. In high-demand markets, investors accept lower cap rates because they expect appreciation to compensate. In slower-growth markets, cash flow investors demand higher cap rates.
Example — Same property, different markets:
Market Property Value NOI Cap Rate
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Austin, TX $420,000 $18,000 4.3%
Memphis, TN $185,000 $14,000 7.6%
Columbus, OH $210,000 $15,500 7.4%
The Memphis and Columbus properties have stronger cap rates — better cash flow per dollar invested. The Austin property is pricing in future appreciation.
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Cap Rate vs. Cash-on-Cash Return
Cap rate and cash-on-cash return are often confused. The key difference:
- Cap rate ignores financing — it's the unleveraged yield on property value
- Cash-on-cash return measures yield on your actual cash invested, including debt service
For leveraged investors (using a mortgage), cash-on-cash return is more relevant because it shows the actual yield on your out-of-pocket investment.
Example with financing:
- Property: $240,000 NOI: $18,000 Cap Rate: 7.5%
- Down payment: $60,000 (25%) Mortgage payment: $1,276/mo ($15,312/yr)
- Annual cash flow = NOI - Mortgage = $18,000 - $15,312 = $2,688
- Cash-on-cash return = $2,688 / $60,000 = 4.5%
The cap rate is 7.5% but cash-on-cash is only 4.5% because the mortgage takes a significant cut of NOI.
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Common Cap Rate Mistakes
1. Using gross rent instead of NOI
Dividing gross rent by purchase price gives you "gross yield," not cap rate. Gross yield inflates the return by ignoring all expenses.
2. Including mortgage in operating expenses
NOI deliberately excludes debt service. Including your mortgage payment underestimates the cap rate.
3. Using purchase price instead of current market value
A property you bought for $150,000 three years ago might be worth $220,000 today. The current cap rate should use $220,000. Using your original purchase price flatters the return.
4. Ignoring management fees
Even if you self-manage, include 8-10% management fees in your expense estimate. Your time has value, and you may not self-manage forever.
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Calculate Cap Rate in Seconds
Use PincerPro's free Go/No-Go calculator to instantly calculate cap rate, cash-on-cash return, and monthly cash flow for any US rental property. Enter purchase price, rent, and basic expense inputs — the calculator handles all the math and delivers a clear Go or No-Go verdict.
For AI-powered deal analysis with PDF reports and scenario modeling, see the full PincerPro platform.