A vacancy and collection loss allowance should be derived from:
Correct Answer
C) Market evidence for competing properties of that type
Why this is correct: As the original explanation notes, a vacancy and collection loss allowance is a forward-looking, stabilized estimate. It should be based on market evidence (e.g., surveys of comparable properties) to reflect typical market conditions, not the subject's unique history or arbitrary rules. Why the other choices are wrong: 'The property's own vacancy in the single best year on record' is not representative of a typical year. 'A fixed five percent applied to every income property type' ignores property-specific and market-specific risks. 'The lender's underwriting minimum' is a financing criterion, not a market-derived estimate. Exam tip: Stabilized vacancy = market-based, not property-specific or rule-of-thumb.
Why This Is the Correct Answer
Market evidence for competing properties of the same type is the correct basis, because the income approach values the property as a typical investor would underwrite it rather than as the current owner has operated it. Competing properties define what a purchaser could reasonably expect, and using them keeps the subject's income consistent with the market from which capitalization rates were extracted. It also guards against importing an owner's unusual management skill or neglect into a market value opinion. The subject's own history informs the estimate but does not replace the market benchmark.
Why the Other Options Are Wrong
Option A: The property's own vacancy in the single best year on record
A single best year is by definition unrepresentative, capturing a period of unusually strong demand or fortunate timing rather than normal operations. Using it would understate vacancy, overstate effective gross income, and inflate value by the reciprocal of the capitalization rate. Stabilization exists precisely to smooth away single-year extremes in both directions.
Option B: A fixed five percent applied to every income property type
A flat five percent across every property type ignores that vacancy norms differ enormously between apartments, single-tenant net-leased buildings, multi-tenant office, and self-storage, and differ again by submarket and by the strength of the local economy. A rule of thumb is not market evidence and cannot support the estimate. It would be simultaneously too high for a long-term net-leased property and too low for a soft office submarket.
Option D: The lender's underwriting minimum for the loan program
A lender's underwriting minimum is a risk-management floor set for loan approval, not a measurement of market behavior, and adopting it would let a client's internal policy drive the value conclusion. Underwriting standards may be more conservative than the market, deliberately so, since their purpose is protecting the loan rather than estimating value. Using a client-supplied figure in place of market evidence also raises independence concerns.
What Would a Typical Buyer Expect
Every line of a stabilized statement answers the same question: what would a typical purchaser experience? Not the best year, not a rule of thumb, not the lender's policy. What competing properties actually do.
How to use: When a stem asks where an income or expense figure should come from, choose the market-derived option. Reject the subject's best or worst year, any fixed percentage, and any client or lender standard.
Exam Tip
Consistency between numerator and denominator governs here too. Vacancy must be estimated on the same basis as the sales from which the capitalization rate was extracted.
Common Mistakes to Avoid
- -Using the subject's current vacancy without testing it against the market
- -Applying a rule-of-thumb percentage across property types
- -Confusing physical vacancy with economic vacancy caused by below-market rents
Concept Deep Dive
Analysis
The vacancy and collection loss allowance converts potential gross income into effective gross income, and it is a forward-looking, stabilized estimate rather than a historical fact. Stabilized means it represents what a typical, competent owner would expect over a normal operating period, not what happened in any single year. Two components ride together in the line: vacancy, the physical space expected to be unoccupied through ordinary turnover and lease-up, and collection loss, the rent billed but never collected from tenants who default. Both are derived from market evidence, which means surveys of competing properties of the same type in the same submarket, published market reports, and the subject's own history read as one data point among several rather than as the answer. The subject's own experience matters when it diverges persistently from the market, since chronic underperformance may indicate a physical or locational problem the appraiser should investigate rather than average away.
Background Knowledge
You need the income build-up from potential gross income through vacancy and collection loss to effective gross income, and the requirement to analyze comparable rental and operating data so the income reflects market conditions. You should also understand stabilized versus actual figures and the distinction between physical vacancy, economic vacancy, and collection loss.
Real-World Application
An appraiser valuing a 40-unit apartment building surveys six competing complexes, finds physical vacancy running five to seven percent with modest collection loss, adopts a stabilized seven percent combined allowance, notes the subject's current three percent reflects below-market rents, and explains the reconciliation.
More Income Approach Questions
In a percentage lease, rent is commonly structured as:
In a DCF, what is the reversion?
Potential gross income differs from effective gross income in that PGI assumes:
The reversion in a discounted cash flow model represents:
Building A (new, credit tenant, 20-year lease) and Building B (older, month-to-month tenants) sell the same week. Their cap rates should differ how?
An overall rate extracted from a sale whose NOI excluded reserves, applied to a subject NOI that includes them, will:
Replacement reserves cover which kind of expenditure?
What is the primary distinction, for appraisal purposes, between 'vacancy loss' and 'collection loss'?
An appraiser is analyzing a mixed-use property with retail and office components. The retail segment has a potential gross income of $180,000 with a market vacancy of 8%. The office segment has a potential gross income of $120,000 with a market vacancy of 12%. What is the overall effective gross income for the property?
The mortgage constant represents:
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