Rental property

Operating Expense Ratio Calculator

Measure operating expenses as a share of effective rental income. Replace every default with figures that apply to your property and location.

What this calculator estimates

Measure operating expenses as a share of effective rental income. It combines the inputs below to produce Operating expense ratio. Every assumption remains editable so the estimate can reflect the property, financing and location being evaluated.

Worked example

Using the displayed sample assumptions, the calculator produces 36.84%. This is an illustration, not a market quote. Change one input at a time to understand what drives the result.

Inputs and assumptions

• Annual gross potential income — sample input: 60000 currency units
• Vacancy and credit loss — sample input: 5 %
• Annual operating expenses — sample input: 21000 currency units

How to interpret the result

Review cash flow together with reserves, vacancy and financing risk. Compare a conservative case with an expected case and keep a record of the assumptions used.

Common mistake to avoid

Do not treat gross rent as net operating income. Local definitions, taxes, lending practices and measurement requirements can materially change the result.

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Reviewed 2026-09-08.