How Operating Expenses Affect Investment Property Financing

Gross rent shows what a property earns; operating expenses show what it produces. Learn how expenses shape NOI, DSCR, and investment property financing.

How Operating Expenses Affect Investment Property Financing

A rental property can generate substantial income and still be a poor investment.

Why?

Because gross rental income isn't the same as Net Operating Income (NOI).

Taxes, insurance, maintenance, management, utilities, vacancy, and other operating expenses can significantly affect the economics of an investment property.

And those numbers can also affect financing.

Gross Rental Income vs. Net Operating Income

Consider a property generating:

$120,000 in annual rental income

Now assume the property has:

• $15,000 property taxes
• $8,000 insurance
• $7,000 maintenance
• $10,000 property management
• $5,000 other operating expenses

Total operating expenses:

$45,000

Approximate NOI:

$120,000 − $45,000 = $75,000

The property doesn't actually produce $120,000 of NOI.

It produces approximately $75,000 before debt service and other items excluded from NOI.

Why NOI Matters to Financing

For many larger commercial properties, lenders evaluate the property's actual operating income and expenses to determine NOI.

Belsky Mortgage's FAQ specifically notes that commercial properties may be evaluated using actual rental revenue over a trailing period along with actual expenses, with NOI then used in the DSCR calculation.

That means investors should understand their property's operating statement—not simply its gross rents.

Property Taxes

Property taxes can have a meaningful impact on investment-property economics.

A property with low taxes may produce substantially different cash flow from an otherwise similar property with higher taxes.

Investors should investigate:

• Current property taxes
• Recent reassessments
• Expected taxes after purchase
• Local tax rates
• Special assessments

Don't assume the seller's current tax bill will necessarily remain unchanged after a transaction.

Insurance

Insurance is another expense investors should investigate before purchasing.

This is particularly important in markets where insurance costs have increased significantly.

Before buying, investors should obtain a realistic insurance estimate and incorporate it into the investment analysis.

An attractive property can look considerably less attractive when the actual insurance premium is known.

Property Management

Professional property management can provide tremendous value.

But it also represents an expense.

Investors should determine whether the property currently uses professional management and what management fees are being charged.

Even investors who plan to self-manage may want to model a management expense.

Why?

Because the goal is to understand the property's economics independently of who happens to manage it.

Maintenance and Repairs

Older properties often require more maintenance.

Investors should consider:

• Roof
• HVAC
• Plumbing
• Electrical
• Appliances
• Exterior maintenance
• Landscaping
• Common areas

Ignoring maintenance can artificially inflate projected returns.

Vacancy

A property that is 100% occupied today isn't necessarily going to remain 100% occupied.

Investors should understand the local vacancy environment and consider appropriate assumptions.

This becomes especially important when evaluating multifamily properties.

Why Two Properties With Identical Rents Can Have Different Financing

Consider two properties:

Property A

Annual rent: $120,000
Operating expenses: $30,000
NOI: $90,000

Property B

Annual rent: $120,000
Operating expenses: $50,000
NOI: $70,000

Both generate exactly the same gross rent.

But Property A produces $20,000 more NOI.

That difference can materially affect:

• DSCR
• Property value
• Loan sizing
• Cash flow
• Investor returns

The Financing Connection

For 1–8 unit residential DSCR loans, lenders commonly focus on rental income relative to PITIA.

For larger commercial properties, underwriting can be based more directly on NOI and property-level operating performance. Belsky's current DSCR information specifically distinguishes these approaches.

This is one reason investors should know whether they are evaluating a residential investment-property loan or a commercial transaction before assuming the underwriting will work the same way.

Stress-Test Your Investment

Don't ask only:

"Does this property cash flow today?"

Also ask:

"What happens if expenses increase?"

Try scenarios involving:

• Higher insurance
• Higher taxes
• Increased maintenance
• Vacancy
• Lower rents
• Higher management costs

If the investment still works under reasonable stress scenarios, you've learned something important about its durability.

Frequently Asked Questions

What expenses are included in NOI?

Generally, NOI reflects property operating income minus normal operating expenses, but the exact treatment can vary by property and underwriting methodology.

Do property taxes affect DSCR?

Yes. Property taxes can affect the property's expenses and therefore its qualifying income and debt-service coverage.

Does insurance affect investment-property financing?

Yes. Insurance costs can affect property economics and, depending on the loan structure, the payment used in qualification.

Why is NOI important for commercial real estate?

NOI provides a measure of the property's operating income before debt service and is an important component of commercial property valuation and loan underwriting.

Final Thoughts

Real estate investors shouldn't evaluate a property based solely on purchase price and monthly rent.

The real question is:

What does the property actually produce after operating expenses?

Understanding that number can help you make better investment decisions and have a more productive conversation with your lender.

Explore Belsky Mortgage's DSCR financing

Visit the Belsky Mortgage Investor FAQ

Have a rental or commercial property you're evaluating? Submit the basic deal information through the Belsky Mortgage Quick App to start the conversation.