California real estate brokers who serve investor clients must be fluent in the financial metrics used to evaluate income-producing properties. These metrics allow investors to compare opportunities, evaluate returns relative to risk, and assess how leverage affects performance. This section covers the core investment analysis tools tested on the California broker exam.
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NOI is the foundation of commercial real estate valuation and analysis. It measures the property's income-generating ability before debt service.
Formula:
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NOI = Gross Scheduled Income (GSI)
- Vacancy and Credit Loss
= Effective Gross Income (EGI)
- Operating Expenses
= NOI
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Gross Scheduled Income (GSI): Total rent if all units were occupied at market rate for a full year.
Vacancy and Credit Loss: Typically 5–10% for stabilized properties; higher for value-add or distressed assets.
Effective Gross Income (EGI): GSI minus vacancy = actual expected income.
Operating Expenses include: Property taxes, insurance, utilities (landlord-paid), property management fees, maintenance and repairs, landscaping, reserves. Operating expenses do NOT include: mortgage payments (debt service), depreciation (non-cash), capital improvements, or income taxes.
Example:
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The cap rate is the most widely used measure of value for income properties. It expresses the relationship between NOI and property value.
Formula:
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Cap Rate = NOI ÷ Value
Value = NOI ÷ Cap Rate
NOI = Value × Cap Rate
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Interpretation:
Example: A building generates $66,000 NOI. Market cap rates for this property type are 5.5%. Indicated value = $66,000 ÷ 0.055 = $1,200,000
Cap rate and interest rates: When interest rates rise, cap rates tend to rise (values fall). The "cap rate spread" — the difference between cap rates and long-term Treasury rates — is a key risk premium metric.
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The GRM is a simpler, quick-screening tool that compares price to gross rent without accounting for expenses.
Formula:
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GRM = Price ÷ Annual Gross Rent (or monthly gross rent)
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Use case: A buyer looking at residential income properties can quickly compare GRMs across multiple properties. A property with a GRM of 14 (price = 14 × annual rent) is priced higher relative to rent than one with a GRM of 10.
Limitation: GRM ignores vacancy, expenses, and NOI. Two properties with the same GRM can have very different cash flows if one has higher expenses. GRM is a rough filter, not a substitute for full analysis.
Example: Price $1,200,000 ÷ Annual Gross Rent $120,000 = GRM of 10
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Cash-on-cash measures the annual pre-tax cash flow return on the equity invested (down payment + closing costs).
Formula:
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Cash-on-Cash Return = Annual Before-Tax Cash Flow ÷ Total Cash Invested
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Annual Before-Tax Cash Flow = NOI − Annual Debt Service
Example:
Cash-on-cash captures the effect of leverage — it shows the actual cash yield on the investor's equity, not the property's overall yield (which is the cap rate).
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The DSCR measures the property's ability to cover its debt obligations. Lenders use it as a key underwriting metric.
Formula:
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DSCR = NOI ÷ Annual Debt Service
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Lender requirements: Commercial lenders typically require a minimum DSCR of 1.25 (some require 1.20 or 1.30 depending on property type and market conditions). DSCR of 1.25 means the NOI is 1.25 times the annual mortgage payment — 25% cushion above debt service.
Interpretation:
Example: NOI $66,000 ÷ Annual debt service $48,000 = DSCR 1.375 — acceptable to most lenders.
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Leverage (using borrowed money) amplifies returns — both positive and negative.
Unleveraged return (cap rate): What the property earns on its total value, assuming all-cash purchase. The cap rate IS the unleveraged return.
Leveraged return (cash-on-cash): What the equity earns after paying debt service.
Positive leverage: When the cap rate exceeds the mortgage interest rate, leverage increases the cash-on-cash return above the cap rate. Example: 6% cap rate, 4.5% interest rate = positive leverage.
Negative leverage: When the mortgage rate exceeds the cap rate, leverage REDUCES the cash-on-cash return below the cap rate. This is common in low-cap-rate markets where interest rates have risen. Example: 4.5% cap rate, 7% interest rate = negative leverage — the investor earns less cash-on-cash than an all-cash buyer would earn on the cap rate.
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The IRS allows investors to depreciate the cost of residential income property over 27.5 years (commercial: 39 years) using straight-line depreciation. Only the structure depreciates — not the land.
Formula:
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Annual Depreciation = (Purchase Price − Land Value) ÷ 27.5
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Example: $1,200,000 property, land value $200,000:
Depreciation is a non-cash deduction — it reduces taxable income without any actual cash outflow. This makes real estate a highly tax-advantaged investment compared to stocks or bonds.
Depreciation recapture: When the property is eventually sold, the IRS recaptures depreciation at a 25% tax rate (Section 1250 gain). A 1031 exchange defers depreciation recapture along with capital gains.
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IRS passive activity loss rules affect how investors can use real estate losses:
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The Operating Expense Ratio (OER) expresses operating expenses as a percentage of EGI:
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OER = Operating Expenses ÷ EGI
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Typical OERs:
A high OER relative to market benchmarks may indicate operational inefficiency or deferred maintenance being expensed as repairs.
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Standard underwriting assumptions:
Vacancy assumptions should be based on comparable market data. Underestimating vacancy is one of the most common errors in pro forma analysis.
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Investment analysis should incorporate exit strategy:
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Quiz Questions:
Q1. A 20-unit apartment building generates gross scheduled income of $240,000/year. Vacancy runs 6%. Operating expenses are $80,000. What is the NOI?
A) $160,000 B) $145,600 C) $240,000 D) $146,000
Answer: B — EGI = $240,000 × (1 − 6%) = $225,600. NOI = $225,600 − $80,000 = $145,600.
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Q2. An apartment building has NOI of $145,600. A buyer requires a 6% cap rate. What is the indicated value?
A) $8,736 B) $2,426,667 C) $1,820,000 D) $2,200,000
Answer: B — Value = NOI ÷ Cap Rate = $145,600 ÷ 0.06 = $2,426,667.
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Q3. An investor purchased a building for $2,000,000 with a $500,000 down payment. The NOI is $100,000 and annual debt service is $80,000. What is the cash-on-cash return?
A) 5% ($100,000 ÷ $2,000,000 — the cap rate) B) 8% ($80,000 ÷ $1,000,000) C) 4% ($20,000 ÷ $500,000) D) 10% ($100,000 ÷ $1,000,000)
Answer: C — Cash flow = NOI − Debt Service = $100,000 − $80,000 = $20,000. Cash invested = $500,000 (down payment). Cash-on-cash = $20,000 ÷ $500,000 = 4%.
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Q4. A commercial lender requires a minimum DSCR of 1.25. A property generates NOI of $150,000. What is the maximum annual debt service the lender will allow?
A) $120,000 B) $112,500 C) $125,000 D) $187,500
Answer: A — DSCR = NOI ÷ Debt Service, so Debt Service = NOI ÷ DSCR = $150,000 ÷ 1.25 = $120,000 maximum annual debt service.
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Q5. An investor purchases a $2,000,000 residential rental property. The land is valued at $400,000. What is the annual depreciation deduction?
A) $72,727 ($2,000,000 ÷ 27.5) B) $14,545 ($400,000 ÷ 27.5) C) $58,182 ($1,600,000 ÷ 27.5) D) $51,282 ($2,000,000 ÷ 39)
Answer: C — Land is not depreciable. Depreciable basis = $2,000,000 − $400,000 = $1,600,000. Annual depreciation = $1,600,000 ÷ 27.5 = $58,182.