How To Calculate Operating Expense Ratio For Rental Property
For beginner real estate investors, understanding the financial health of your rental property is paramount. One key metric to grasp is the Operating Expense Ratio (OER). This ratio helps you assess how much of your rental income is consumed by operating expenses, providing clarity on your property’s profitability. A lower OER generally indicates a more efficient and potentially more profitable investment.
What is the Operating Expense Ratio?
The Operating Expense Ratio (OER) is a simple yet powerful formula that illustrates the relationship between a property’s operating expenses and its gross operating income. It tells you, as a percentage, what portion of your income is going towards keeping the property running.
Why is the Operating Expense Ratio Important?
- Profitability Assessment: It provides a snapshot of your property’s efficiency and profitability. A high OER might signal the need to reduce expenses or increase income.
- Comparison Tool: You can use OER to compare the financial performance of different properties in your portfolio or to benchmark against industry averages (though these can vary widely by property type and location).
- Investment Decision Making: Before purchasing a new property, calculating its projected OER can help you determine if it aligns with your investment goals and expected returns.
- Budgeting and Forecasting: Understanding your OER helps in creating realistic budgets and financial forecasts for your rental property.
Elements of the Operating Expense Ratio
1. Gross Operating Income (GOI)
Your Gross Operating Income is the total income generated by your rental property before deducting any expenses. For a rental property, this primarily includes:
- Rental Income: The total amount of rent collected from tenants.
- Other Income: This could include laundry income, parking fees, pet fees, late fees, etc.
Note: Do not include security deposits in GOI, as they are a liability, not income.
2. Operating Expenses (OE)
Operating expenses are the costs associated with running and maintaining your rental property. It’s crucial to distinguish these from non-operating expenses.
Common Operating Expenses:
- Property Management Fees: If you hire a property manager, their fees are a significant operating expense.
- Maintenance and Repairs: Routine maintenance (e.g., landscaping, cleaning) and minor repairs (e.g., leaky faucet, appliance repair).
- Utilities: If you pay for utilities like water, electricity, gas, or trash for common areas or vacant units.
- Property Taxes: Payments made to local government based on the property’s assessed value.
- Insurance: Landlord insurance protecting against perils like fire, liability, and loss of rent.
- Advertising and Marketing: Costs associated with finding new tenants (e.g., online listings, signage).
- Legal and Accounting Fees: Costs for legal advice (e.g., eviction, lease drafting) or tax preparation.
- HOA Fees: If your property is part of a homeowners’ association.
- Supplies: Cleaning supplies, light bulbs, etc., for the property.
What NOT to Include in Operating Expenses:
- Mortgage Principal and Interest: These are financing costs, not operating expenses.
- Capital Expenditures (CapEx): These are major improvements that increase the property’s value or extend its useful life (e.g., a new roof, HVAC system, major renovation). While important for the property, they are treated differently for accounting and OER purposes.
- Depreciation: A non-cash expense for tax purposes, not an actual outflow of cash for operations.
- Vacancies and Credit Losses: While these reduce your income, they are typically accounted for before calculating GOI or as a separate line item, rather than as an operating expense.
The Operating Expense Ratio Formula
The formula is straightforward:
Operating Expense Ratio (OER) = (Total Operating Expenses / Gross Operating Income) x 100
Step-by-Step Calculation Example
Let’s assume you have a rental property with the following financial data for a year:
Gross Rental Income: $24,000
Other Income (e.g., parking fees): $500
Operating Expenses:
- Property Management Fees: $2,400
- Maintenance and Repairs: $1,200
- Property Taxes: $1,800
- Landlord Insurance: $900
- Utilities (owner-paid common areas): $600
- Advertising: $300
Step 1: Calculate Gross Operating Income (GOI)
GOI = Gross Rental Income + Other Income
GOI = $24,000 + $500 = $24,500
Step 2: Calculate Total Operating Expenses (OE)
OE = Sum of all operating expenses
OE = $2,400 (PM Fees) + $1,200 (M&R) + $1,800 (Taxes) + $900 (Insurance) + $600 (Utilities) + $300 (Advertising)
OE = $7,200
Step 3: Calculate the Operating Expense Ratio
OER = (OE / GOI) x 100
OER = ($7,200 / $24,500) x 100
OER = 0.293877… x 100
OER ≈ 29.39%
In this example, approximately 29.39% of your rental property’s gross operating income is consumed by operating expenses.
Interpreting Your OER
What’s a “good” OER? This isn’t a one-size-fits-all answer. According to a National Multifamily Housing Council (NMHC) report for 2023, which surveys large apartment properties, operating expenses can vary significantly. However, for well-managed multifamily properties, OERs often fall in the range of 30% to 50%. For single-family rentals, this can vary, but generally, a ratio below 50% is considered healthy by many investors. High-quality, newer properties in desirable locations might have lower OERs due to less maintenance and higher rents, whereas older properties or those in demanding markets might have higher OERs.
If your OER is consistently high (e.g., above 60-70% for an extended period), it might indicate issues with your income generation or expense management, warranting a deeper dive into your financials.
FAQs
1. What is a “good” operating expense ratio for a rental property?
A “good” OER can vary widely based on property type, age, location, and market conditions. For single-family rentals, many investors aim for an OER between 30% and 50%. For larger multifamily properties, the NMHC reports show averages that can be in this range or higher depending on specific expense categories. Generally, a lower OER is better as it means more of your income is retained as profit.
2. Should I include debt service (mortgage payments) when calculating OER?
No, you should not include debt service (principal and interest payments) when calculating the Operating Expense Ratio. Mortgage payments are considered financing costs, not operating expenses. The OER focuses purely on the property’s operational efficiency.
3. Why shouldn’t capital expenditures (CapEx) be included in OER?
Capital expenditures are significant investments that improve the property or extend its useful life (e.g., a new roof, HVAC system). They are generally non-recurring large expenses, whereas operating expenses are ongoing costs. Including CapEx would skew the OER, making it less useful for assessing the property’s day-to-day operational efficiency. CapEx is typically budgeted and accounted for separately.
4. How often should I calculate my Operating Expense Ratio?
It’s beneficial to calculate your OER regularly, at least annually, to track trends and make informed decisions. Many investors calculate it quarterly or even monthly for more granular insights, especially when a property is new or undergoing significant changes.
5. Can a high OER be acceptable in some situations?
While generally undesirable, a temporarily high OER might be acceptable if there’s a clear reason, such as significant, one-time marketing expenses for a new property, or an unusual repair that won’t recur. However, a persistently high OER without an explainable temporary cause warrants careful review.
6. How does OER relate to Net Operating Income (NOI)?
The Operating Expense Ratio and Net Operating Income (NOI) are closely related. NOI is calculated as Gross Operating Income – Total Operating Expenses. OER essentially expresses expenses as a percentage of income, while NOI gives you the absolute dollar amount of income remaining after operating expenses, before debt service and taxes. Both are critical metrics for property analysis.
7. What if my OER is much higher than expected?
If your OER is significantly higher than anticipated, it’s a call to action. Review your income streams to see if rents are competitive or if there’s potential for additional income. More importantly, scrutinize every expense line item. Are property management fees too high? Are maintenance costs excessive? Could you find a cheaper insurance provider? Are there any unnecessary expenses you can cut?
Bottom Line
The Operating Expense Ratio is a fundamental tool for any real estate investor. By understanding and regularly calculating your OER, you gain valuable insights into your rental property’s financial health, enabling you to make data-driven decisions to optimize profitability and build a sustainable investment portfolio.