Expense Modeling
% of Rent Mode
Operating expenses are estimated as a single percent of gross rent.
This is fast and good for quick filters.
Typical ranges vary widely by property/market. If unsure, start conservative.
Itemized Mode
Vacancy, management, repairs, and capex are entered as percentages of gross rent, plus “Other Monthly.”
Itemizing can reduce surprises — but only if your inputs are realistic.
What counts as Operating Expenses?
In this calculator, operating expenses generally include vacancy, property management, repairs/maintenance,
capital expenditures (CapEx reserves), and any owner-paid utilities/HOA/yard/snow.
Property taxes and insurance are handled separately in the calculator (they are not included in the OpEx %).