What is the greatest weakness in using GIM as a unit of comparison?

• A. It is highly precise for all property types
• B. It ignores vacancy and expenses
• C. It overemphasizes debt service
• D. It is simplistic, and may not fully address vacancy or expenses

Answer: (D)

GIM uses price relative to gross income, but it ignores what it actually costs to operate the property. Because of that, vacancy losses and operating expenses aren’t reflected, so two properties with the same gross income can produce very different net incomes and values. It’s a simplistic approach that doesn’t adjust for how vacancy and expenses affect cash flow, making it a rough comparison rather than a precise one. For quick screening it’s useful, but for more accurate comparisons you’d rely on net operating income and capitalization rate analyses.