Gross operating income is the total revenue generated from property operations before deducting operating expenses, including rent plus other income sources.
| GOI Component | Source |
| Base rental income | Primary revenue from tenants |
| Parking fees | Separate parking space charges |
| Storage fees | Additional storage unit rental |
| Laundry income | Shared laundry facilities |
| Pet fees | Additional charges for pets |
| Late payment fees | Penalties on overdue rent |
| Calculation Steps | Formula |
| Step 1: Potential gross income | Rent at 100% occupancy |
| Step 2: Vacancy and credit loss | Subtract expected losses |
| Step 3: Other income | Add ancillary revenues |
| Result: Effective gross income | Used to calculate NOI |
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