--- title: Operating Expense Ratio I description: What is the operating expense ratio that is used in commercial mortgage underwriting? --- [![c-loans-logo-2025](https://info.c-loans.com/hs-fs/hubfs/images/c-loans-logo-2025.png?width=183&height=86&name=c-loans-logo-2025.png)](https://c-loans.com) [Terms of Use](https://www.c-loans.com/terms-of-use) | [Disclaimer](https://www.c-loans.com/disclaimer) | [Blog](https://info.c-loans.com/) # Commercial Loans and Fun Blog ## [Operating Expense Ratio I](https://info.c-loans.com/bid/73613/the-operating-expense-ratio-in-commercial-mortgage-underwriting-i) Posted by [George Blackburne](https://info.c-loans.com/author/george-blackburne) on Mon, Mar 26, 2012 - [Tweet](https://twitter.com/share) The Operating Expense Ratio is used by commercial mortgage underwriters to catch commercial borrowers who are trying to cheat.  The ***Operating Expense Ratio*** is defined as the Projected Operating Expenses divided by the Effective Gross Income (the Gross Income minus a 5% Reserve for Vacancy & Collection Loss), the result multiplied by 100%. Operating Expense Ratio = (Projected Operating Expenses / Effective Gross Income) x 100%   [![Free Commercial Loan Placement Kit](https://no-cache.hubspot.com/cta/default/37671/882eb54a-a8b4-4c38-a2ed-605338b6f07a.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/882eb54a-a8b4-4c38-a2ed-605338b6f07a)   [![Commercial Loan Size Calculator](https://no-cache.hubspot.com/cta/default/37671/69671e83-0549-4138-b4e0-02dccf0f19c9.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/69671e83-0549-4138-b4e0-02dccf0f19c9)   **Example:**  Suppose an apartment building owner is trying to refinance his 64-unit project.  His Projected Operating Expenses for next year, including a 6% off-site property management factor*, is $248,064 per year.  His Projected Gross Income is $1,000 per unit per month, or $64,000 per month.  Assuming a 5% Reserve for Vacancy and Collection Loss, his Effective Gross Income per month is $60,800 (95% of $64,000).  If we anualize that number, we get $729,600.  Therefore: Operating Expense Ratio = (Operating Expenses / Effective Gross Income) x 100% Operating Expense Ratio = ($248,064 / $729,600) x 100% Operating Expense Ratio = 34.0% *  Even if he manages the property himself, the owner has to figure in the cost of an outside management comapany because if the bank forecloses, the bank certainly isn't going to manage the property itself. If this ratio is too low, according to industry standards, the commercial lender will simply disregard the projected operating expenses provided by the borrower or broker and use an assumption instead.  This assumption is usually punitive and often kills the deal.   [![Free List of 3,159 Commercial Lenders Sort By Your Own Criteria](https://no-cache.hubspot.com/cta/default/37671/edc33fe8-9d87-477b-bf2f-07a33d3d2d24.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/edc33fe8-9d87-477b-bf2f-07a33d3d2d24)   When most commercial mortgage borrowers apply for a new commercial loan, the single most important term in their minds is the loan amount.  Most commercial mortgage borrowers want the largest commercial loan possible.  If a commercial mortgage borrower is buying a property for, say, $1,000,000; he'll usually want to be able to borrow at least $750,000.  This way he only has to put down $250,000 (25% of the $1MM purchase price). In real life, most commercial mortgage borrowers will choose a $750,000 loan at 5.75% over a $690,000 loan at just 5.0%.  It's the loan size, not the interest rate, that is usually the most important commercial loan term. The problem, however, is that the commercial loan size is limited by the **[debt service coverage ratio](http://www.c-loans.com/debt_service_coverage_ratio.html)**.  You'll recall that the debt service coverage ratio is defined as the net operating income (NOI) divided by the debt service (annual principal and interest payments on the proposed loan).     Most commercial lenders today require a debt service coverage ratio of at least 1.25. **The higher the NOI, the larger the commercial loan for which the borrower can qualify**, given a particular debt service coverage ratio. Borrowers and brokers therefore have a large incentive to make the projected expenses on their operating statements look as low as possible.  After all, the lower the projected expenses, the higher the NOI appears.  The higher the NOI appears, the larger the commercial loan for which the borrower can qualify. Commercial lenders therefore must be very suspicious of the projected operating expenses provided by either the borrower or mortgage broker.  The projected operating expenses are often understated or fudged. So how can a commercial lender check to see if the projected operating expenses are reasonable or understated?  Commercial lenders use the ***Operating Expense Ratio*** to check to see if the projected operating expenses are reasonable. So what are these industry standards for the Operating Expense Ratio?  We will cover them in our next blog article, [Operating Expense Ratio II - What Ratios Will Commercial Lenders Believe](https://info.c-loans.com/bid/73978/Operating-Expense-Ratio-II-What-Ratio-s-Will-Commercial-Lenders-Believe). If you found this training article to be instructive, you might want to subscribe to our blog and enjoy free training in commercial real estate finance.     [![Subscribe To Blog](https://no-cache.hubspot.com/cta/default/37671/7636800d-cf5e-48c6-88cb-f71c131eb6ee.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/7636800d-cf5e-48c6-88cb-f71c131eb6ee)   More commercial real estate loans are ballooning in 2016 than in any year in history.  For well-trained commercial mortgage brokers, it will be like a turkey shoot.   [![Nine-Hour Video Training Course How to Broker Commercial Loans](https://no-cache.hubspot.com/cta/default/37671/2fa994cb-f6ac-4671-821f-b4bd48cb5f1f.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/2fa994cb-f6ac-4671-821f-b4bd48cb5f1f)   Got a bankable commercial loan?  Find scores of banks hungry to make commercial loans.  And C-Loans is ***free*** to borrowers and commercial mortgage brokers.   [![Submit Your Loan to 750 Commercial Lenders Using C-Loans.com.  It's Free!](https://no-cache.hubspot.com/cta/default/37671/9f0b2bed-fb9b-455d-b8be-17d8f7960a2a.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/9f0b2bed-fb9b-455d-b8be-17d8f7960a2a)   Topics: [operating expense ratio](https://info.c-loans.com/topic/operating-expense-ratio) ### George Blackburne III Owner of C-Loans, Inc. ![george blackburne photo](https://info.c-loans.com/hs-fs/images/george-blackburne-photo.jpg?width=156&height=217&name=george-blackburne-photo.jpg) ### Subscribe via E-mail ### Connect with C-Loans ## [![Get the Latest Scoop on C-Loans Inc.](https://no-cache.hubspot.com/cta/default/37671/bacfb58b-143e-40d7-b126-33c182b5b90b.png)](https://cta-redirect.hubspot.com/cta/redirect/37671/bacfb58b-143e-40d7-b126-33c182b5b90b) C-Loans.com® is sponsored by  C-Loans, Inc. — For more information, contact Tom Blackburne 555 University Ave., Suite 150, Sacramento, CA 95825 Telephone: (916) 338-3232 x 317 * Tom Blackburne in Indiana: (574) 210-6686 * Fax: (916) 338-2328 Real Estate Broker -- California Department of Real Estate -- License Number 01330173 Arizona Dept. of Financial Institutions – License Number 0909472 The Florida Mortgage Brokers License Number: 0708758 [Read our many client Success Stories](https://c-loans.com/mortgage-brokers-overview/success-stories/) » © 2025 C-Loans, Inc. 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