Cap Rate Guide: How to Calculate Net Operating Income & Commercial Yield
Institutional guide to Capitalization Rates in commercial real estate: Net Operating Income (NOI) derivation, OpEx ratios, and valuation sensitivity across interest rate cycles.
The Capitalization Rate (Cap Rate) is the unleveraged rate of return expected on a real estate investment property based on the Net Operating Income (NOI) it generates. Calculated as Cap Rate = (NOI ÷ Property Purchase Price) × 100, it excludes mortgage financing and corporate taxes, providing a clean metric to compare commercial and multi-family assets across diverse markets.
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Input gross scheduled rents, vacancy reserves, and operating expenses to calculate property cap rates and implied valuation tiers.
1. What Is a Cap Rate? The Capitalization Rate serves as the inverse price-to-earnings (P/E) ratio for physical real estate:
Because it assumes a 100% all-cash purchase, it eliminates the distorting effects of varying mortgage debt structures.
2. Calculating Net Operating Income (NOI) To determine true NOI: 1. **Gross Scheduled Income (GSI):** Total potential rent if all units are occupied 100% of the year. 2. **Effective Gross Income (EGI):** GSI minus vacancy and credit loss reserves plus ancillary revenue (parking, laundry, storage). 3. **Total Operating Expenses (OpEx):** Property taxes, hazard insurance, common area maintenance (CAM), property management fees, and structural repair reserves. 4. **NOI = Effective Gross Income − Total OpEx.**
3. Property Valuation Using Market Cap Rates Appraisers and institutional investors re-arrange the cap rate formula to establish commercial fair market value:
If an apartment building produces $150,000 in NOI and local comparable sales reflect a 6.0% market cap rate, its implied institutional asset value is $2,500,000.
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