Rental property expenses include more than the mortgage payment and annual maintenance. To evaluate an investment accurately, investors should estimate the property’s recurring operating costs, financing expenses, vacancy, and long-term capital needs.

Calculate Effective Rental Income

Begin with the property’s expected rental income, then account for vacancy and unpaid rent:

Gross potential rent + other property income – vacancy and credit loss = effective gross income

Other income may include parking, storage, laundry, or pet fees.

Estimate Operating Expenses

Operating expenses are the recurring costs required to own and maintain the property. Common examples include:

• Property taxes
• Insurance
• Repairs and routine maintenance
• Property management
• Landlord-paid utilities
• HOA fees
• Landscaping and pest control
• Leasing, legal, and accounting expenses
• Licenses and inspections

Subtracting these expenses from effective gross income produces net operating income:

Effective gross income – operating expenses = net operating income (NOI)

Mortgage payments are not included in NOI because financing varies by investor.

Account for Debt Service and Capital Costs

To estimate cash flow, investors should also subtract mortgage principal and interest, along with reserves for major future expenses such as roof, HVAC, or appliance replacement:

NOI – debt service – capital costs and reserves = estimated cash flow

Fixed percentage rules may provide a quick initial estimate, but they should not replace property-specific research. Costs vary based on the property’s age, condition, location, unit count, and management needs.

Verify the Numbers

Whenever possible, investors should review:

• Historical operating statements
• Property-tax records
• Current insurance quotes
• Utility bills
• Maintenance records
• Existing leases
• Management agreements
• Inspection reports

Investors should also stress-test projections using higher assumptions for vacancy, repairs, taxes, and insurance.

The Bottom Line

Accurately calculating rental property expenses helps investors evaluate cash flow, establish appropriate reserves, and determine whether a property can support financing.

CoreVest offers business-purpose financing for residential real estate investors, including long-term rental loans evaluated primarily using property cash flow. Learn more about CoreVest’s 30-Year DSCR Loan, or contact our team to discuss an eligible rental property.

This article is provided for informational purposes only and does not constitute legal, tax, accounting, investment, financial, real estate, or lending advice. Expenses and financial results vary by property and transaction. All loans are subject to underwriting, credit approval, eligibility requirements, and applicable terms and conditions.

CoreVest Finance | NMLS #1627183

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