12.1 Sources of Income Generation

Why Income Sources Come First in Area VI

AQB Content Area VI — Income Approach is the largest single methodology block at Certified General (21 items / 19.1% of scored items) and still appears at Certified Residential (9 / 8.2%) and Licensed Residential (5 / 4.5%). Before multipliers, overall rates, or yield models, the ECO opens with VI.a Sources of income generation: (1) rent and leases, (2) reimbursements, and (3) owner/operator income.

The income approach converts a property income stream into value. If you misstate what is income, every later step—effective gross income (EGI), net operating income (NOI), cap rates, and DCF—is contaminated. National Exam items test definitions, lease-structure effects on who pays what, and whether a dollar line is real-property income or business income.

Working sequence you will use throughout Chapters 12–13:

1. Identify rights appraised (fee simple, leased fee, leasehold) and income premise (market rent vs contract rent).
2. Build potential gross income (PGI) from rents, reimbursements, and other property income.
3. Deduct vacancy and collection loss → EGI.
4. Deduct operating expenses (and treat reserves consistently) → NOI.
5. Capitalize or discount NOI (Chapter 13).

This section owns step 1–2’s income side.

Rent and Leases: The Core Income Source

For most investment real estate, the dominant income is rent paid under leases (or market rent assumed for vacant or owner-occupied space under a fee-simple analysis).

Contract Rent vs Market Rent

Contract rent answers: What does this tenant legally owe under this lease?
Market rent answers: What would a typical tenant pay today for this space under current market lease terms?

Worked comparison:

• Space: 5,000 SF office
• Contract rent: $22/SF/year = $110,000/year
• Market rent: $28/SF/year = $140,000/year

Under a fee simple / market rent PGI build-up for this space alone, annual rent income = $140,000.
Under leased fee / contract for the remaining term (simplified, ignoring other terms), annual rent income = $110,000.
The $30,000 annual shortfall vs market is the economic signal of a below-market lease—critical later for leased fee vs leasehold, but first you must label the rent correctly.

Exam trap: Using the owner’s actual rent roll as “market income” on a fee-simple problem when the stem says rents are below market (or the reverse).

Other Rent-Related Lease Terms (Recognition Level)

• Base rent — fixed minimum rent before percentage or escalations
• Escalations — step-ups, CPI, or fixed bumps over the term
• Options — renewal, expansion, termination (affect duration and risk of the income stream)
• Concessions — free rent, moving allowances, tenant improvements (TI) paid by landlord
• Expense stops / base years — limit landlord expense burden; excess often reimbursed by tenant

You do not need to draft leases on the exam, but you must know that lease clauses change both income and which expenses appear as landlord operating costs.

Gross vs Net Leases

Lease structure determines who pays operating expenses and therefore how PGI and operating expenses (OE) are arrayed.

Critical exam nuance: Labels are not standardized nationwide. “NNN” in one market may still leave roof and structure on the landlord. Always follow what the stem says the parties pay, not the three-letter slogan alone.

Worked rent comparison (same building, different lease forms)

Property OE if landlord pays all: $80,000/year. Market has two pricing conventions for the same space:

Same NOI if the market fully shifts expenses into the rent difference. In real problems, net and gross markets do not always equate perfectly—risk, vacancies, and unreimbursed expenses differ—but the exam loves the idea that you cannot mix a gross rent with NNN expenses without reconstruction.

Trap: Taking gross contract rent from the rent roll and excluding expenses the landlord actually pays (or the reverse: using NNN rent while still deducting full gross expenses).

Reimbursements (CAM, Taxes, Insurance, and Related)

Reimbursements (also called recoveries, passthroughs, or additional rent) are amounts tenants pay the landlord to reimburse specified operating expenses under the lease.

Consistency rule (memorize)

If the landlord incurs the expense and the tenant reimburses the landlord, show both:

• + Reimbursement income in PGI (or as other income)
• − Full expense in OE

If the tenant pays the vendor directly (true direct pay, not through landlord), typically:

• No reimbursement income
• No landlord OE for that item

Worked reimbursement example:

• Landlord pays property taxes $60,000 and insurance $12,000
• Tenants reimburse 100% under NNN leases: +$72,000 reimbursement income
• Landlord also pays unreimbursed management $15,000

If you omitted the $72,000 reimbursements but kept the $72,000 tax/insurance expenses, you would understate income by $72,000 and destroy NOI. That is a classic reconstruction error.

CAM pools and gross-ups (awareness)

Shopping centers and offices often allocate CAM by pro-rata share of occupied or leased SF. Some leases gross-up variable expenses to a stabilized occupancy (e.g., 95%) so occupied tenants do not unfairly subsidize vacancy. On the exam, if a stem mentions gross-up, apply the stated percentage; do not invent one.

Percentage Leases (Overview)

Percentage leases are common in retail: tenant pays base rent plus a percentage of gross sales above a breakpoint.

Natural breakpoint (concept): Base rent ÷ percentage rate.
Example: Base rent $100,000; percentage rate 5% → natural breakpoint = $100,000 ÷ 0.05 = $2,000,000 in sales. Sales above $2,000,000 generate percentage rent at 5%.

Appraisal issues:

• Percentage rent is variable and often riskier than base rent—markets may capitalize or trend it carefully.
• Use stabilized or market-supported sales, not a one-year spike, unless the problem is a short-term cash flow.
• Some leases use an artificial breakpoint different from base ÷ rate—read the stem.

For Chapter 12, know the structure and that percentage rent is still real-property rental income when it is rent under a real estate lease (not a separate business valuation of the retailer’s enterprise).

Owner/Operator Income

Owner/operator income arises when the owner operates a business in the real estate rather than (or in addition to) leasing it to third parties—hotels, self-storage with retail sales, parking operations, marinas, congregate care, owner-operated restaurants, etc.

Exam distinction:

• Valuing real property only → use market rent a typical lessor would earn, or a reconstructed real-estate NOI, not the owner’s entire business profit.
• Valuing a going concern (when the assignment requires it) → business income, FF&E, and intangibles may be in play—but the National Exam’s income approach core is still real property income unless the stem clearly expands the assignment.

Owner-occupied property: For market value of the real estate, appraisers typically impute market rent as if leased (fee simple), rather than using “zero rent because the owner pays no rent.” Owner’s saved rent is not a substitute for market income analysis.

Other Property Income (Often Bundled with Sources)

Besides base rent, reimbursements, percentage rent, and operator revenue, PGI may include:

• Laundry, vending, and parking fees (multifamily)
• Antenna/billboard licenses
• Storage fees
• Interest on tenant deposits (sometimes; follow market practice in stem)

Treat these as other income when they are attributable to the real property and transferable to a typical buyer.

Building Potential Gross Income (Preview)

Potential gross income (PGI) is the total income the property could generate at full occupancy / full collection under the assumed rent levels before vacancy and collection loss.

Simplified multifamily PGI:

Office example with reimbursements:

Vacancy and collection loss come next (Section 12.2); do not bury vacancy inside “PGI” if the stem uses standard appraisal terminology.

Rights, Income Premise, and Consistent Use

Consistent use still applies: do not pair industrial market rents with an office expense structure for a different HBU.

Common Exam Traps — Income Sources

• Confusing contract rent with market rent
• Mixing gross rent with NNN expenses (or NNN rent with full-service expenses)
• Omitting reimbursement income while including the related expenses
• Treating percentage rent as business goodwill rather than lease income
• Using owner’s business profit as real-estate NOI without reconstruction
• Assuming “NNN” always means zero landlord expenses
• Ignoring concessions when the stem gives free rent or TI that affect effective rent

Bridge to the Rest of Chapter 12

You can now identify what dollars count as property income and how lease form reshapes the statement. Section 12.2 reduces PGI for occupancy, vacancy, and collection loss to reach EGI. Section 12.3 classifies operating expenses and reserves. Section 12.4 ties the full chain PGI → EGI → NOI by reconstructing a messy owner operating statement—the highest-yield math skill in this chapter and a direct setup for ECO VI.d (reconstruction of the operating statement) and direct capitalization in Chapter 13.