Commercial Loans for Real Estate Investors: NOI, Cap Rate & DSCR Explained

Commercial financing runs on a different vocabulary than residential investor loans. If you've mostly worked with DSCR loans on single-family rentals and you're looking at your first multifamily, mixed-use, or retail deal, the underwriting logic will feel familiar in spirit but different in the details. Here's the terminology and structure you actually need to know.

What counts as "commercial" here

In lending terms, commercial financing generally applies to:

• Multifamily properties with 5+ units (1–4 unit properties are typically financed as residential investment property, even though they're still rentals)
• Mixed-use buildings (residential over retail, for example)
• Retail, office, and industrial properties
• Other income-producing commercial real estate

The line at 5 units matters because it's where Fannie Mae/Freddie Mac residential guidelines stop applying and commercial underwriting standards take over — a real, structural distinction, not just industry jargon.

NOI: the number everything else is built on

Net Operating Income (NOI) is the property's annual income after operating expenses, but before debt service (loan payments) and before depreciation or income taxes:

Nearly every other commercial underwriting metric — cap rate, DSCR, loan sizing — is calculated from NOI. Getting a clean, accurate NOI picture (usually from trailing 12-month financials, a rent roll, and an expense history) is the single most important input to the whole process.

Cap rate: how commercial properties are valued

Capitalization rate (cap rate) is a shorthand for property valuation based on income:

Lower cap rates generally correspond to lower-risk, higher-demand properties (think stabilized multifamily in a strong market); higher cap rates typically reflect more risk or a value-add opportunity. Cap rate helps you and your lender sanity-check whether a purchase price is reasonable relative to the income the property produces.

DSCR still applies — just at the property, not you

Commercial loans use DSCR the same way residential DSCR loans do — measuring whether the property's income covers its debt payments — but the calculation uses NOI rather than simple gross rent:

Commercial lenders commonly want to see a DSCR comfortably above 1.0 — the exact minimum varies by lender, property type, and loan program, similar to residential DSCR underwriting.

Recourse vs. non-recourse

This is a distinction that doesn't really exist in residential investor lending but matters a great deal in commercial deals:

• Recourse loans let the lender pursue the borrower's other assets if the property's collateral doesn't cover the debt in a default.
• Non-recourse loans limit the lender's remedy to the property itself in most circumstances (though nearly all non-recourse loans carry "bad boy" carve-outs for fraud, misrepresentation, or bankruptcy that can trigger personal liability anyway).

Non-recourse terms are more common on larger, institutional-quality commercial loans; smaller commercial and bridge-to-commercial deals are frequently recourse. This is a term worth negotiating explicitly, not assuming.

Amortization vs. balloon terms

Many commercial loans amortize over a longer period (25–30 years) than their actual term (5, 7, or 10 years) — meaning the payment is calculated as if the loan lasted decades, but the full remaining balance comes due (a "balloon payment") at the end of the shorter term. This keeps monthly payments manageable while giving the lender a periodic opportunity to reprice the loan. Know your balloon date and refinance/exit plan well before it arrives.

Getting started

For a first commercial deal review, have ready: trailing 12-month financials or a rent roll, the purchase price or current value, and your basic plan (buy-and-hold, value-add, refinance). That's enough for a broker with commercial lender relationships to tell you quickly whether the deal pencils.