What Is Income Approach
The Income Approach values a property based on the net income it generates rather than construction costs or comparable sales prices. Assessors calculate this by dividing annual net operating income by a capitalization rate (cap rate) to arrive at estimated property value. This method applies most directly to rental properties, commercial buildings, and any property generating tenant revenue.
For income-producing properties, assessors often use this approach alongside the Cost Approach to triangulate a defensible assessment. Understanding how assessors apply the Income Approach matters significantly in appeals, because errors in income calculations or cap rate selection can inflate assessments by 15 to 25 percent.
How Assessors Calculate It
Assessors follow this process when using the Income Approach:
- Determine annual gross rental income from leases and market rents for comparable units
- Subtract typical vacancy losses, usually 5 to 10 percent depending on local market conditions
- Deduct operating expenses including property taxes, insurance, maintenance, utilities, and management fees (typically 25 to 35 percent of gross income)
- Calculate net operating income (NOI) by subtracting total expenses from adjusted gross income
- Divide NOI by the capitalization rate to obtain estimated property value
For example, a 10-unit apartment building generating $120,000 gross annual rent with 7 percent vacancy and 30 percent operating expenses yields $75,600 NOI. Using a 6 percent cap rate produces a $1.26 million assessed value.
Challenging Income Approach Assessments
At board of review hearings, focus your appeal on three vulnerable areas: income figures, expense calculations, and cap rate selection. Request the assessor's documentation showing actual lease amounts, not inflated market rent assumptions. If the assessor used 8 percent cap rate when comparable income properties in your market trade at 6.5 percent, you have grounds for reduction. Similarly, challenge unrealistic expense deductions if the assessor omitted significant costs like capital reserves or property management fees.
Bring supporting documentation to your hearing: actual tenant leases, operating expense receipts, and recent appraisals from your lender. These substantiate whether the assessor's income and expense inputs match reality.
Common Questions
- Can assessors use projected future income instead of current actual income? Some assessors apply speculative upward adjustments for anticipated rents. Challenge this at your board of review hearing by presenting actual lease terms and recent comparable rental rates. Most jurisdictions require assessors to use current-year income or historical averages, not forecasted amounts.
- What cap rate should be used in my assessment? The cap rate varies by market, property type, and financing conditions. Rates typically range from 5 to 8 percent. Research recent sales of comparable income properties in your area and calculate implied cap rates. If your property's implied cap rate differs significantly from market comps, you have a clear appeal argument.
- How does the Income Approach differ from the Cost Approach for my commercial property? The Cost Approach estimates value by adding land value and depreciated building replacement cost. The Income Approach reflects what investors would actually pay based on cash flow. Market conditions often make these approaches yield different values, which is why assessors weight them differently depending on property type and local assessment practices.