What is a multi-family or commercial loan?
A multi-family or commercial loan finances properties with 5 or more residential units, mixed-use buildings, or commercial real estate. Unlike residential mortgages, these loans qualify on the property's net operating income (NOI) and Debt Service Coverage Ratio (DSCR) — not your personal income.
For 5 to 20 unit properties, most investors use a DSCR-based loan: the property's rental income must cover the mortgage payment (a DSCR of 1.0 or higher). The lender looks at the rent roll, the operating expenses, the appraisal, and your experience — but not your W-2s or tax returns. This is the same DSCR logic used for single-family investment properties, scaled up.
For 20+ unit properties, agency financing (Fannie Mae, Freddie Mac) and bridge-to-permanent structures become available, often with interest-only periods and longer amortization. Mixed-use and commercial properties (retail, office, industrial) are underwritten on the NOI and the lease strength. Portfolio loans can bundle 2 to 10+ properties under a single blanket mortgage, streamlining underwriting and letting you grow faster than loan-by-loan.
Multi-family & commercial at a glance
Things most people don't know about multi-family loans
The details that scale a portfolio.
The NOI is the whole game
Net Operating Income — gross rents minus operating expenses (taxes, insurance, maintenance, management, vacancy) — is what qualifies the loan. A building with strong rents and tight expenses supports more debt than one with the same revenue but bloated costs. Improve the NOI and you improve the loan.
Agency financing unlocks at 20+ units
Fannie Mae and Freddie Mac offer multifamily loans for 20+ unit properties with fixed rates, 25 to 30 year amortization, and interest-only periods. These agency loans are among the cheapest commercial financing available — but they require stronger financials and more documentation than a DSCR loan.
One loan can cover your whole portfolio
A portfolio loan bundles 2 to 10+ properties under a single blanket mortgage with cross-collateralization. This streamlines underwriting (one set of documents, one closing), reduces per-property costs, and lets you grow faster than doing each property as a separate loan.
Mixed-use income counts from all units
A mixed-use property with retail on the ground floor and apartments above can qualify on the combined income from all units — residential and commercial. The lender looks at the total NOI, not just the residential portion, which can push the DSCR higher and unlock better terms.
Bridge-to-perm lets you stabilize first
A bridge loan acquires a value-add property (below-market rents, deferred maintenance), you improve it and raise rents, then you refinance into a permanent agency or DSCR loan based on the stabilized NOI. The bridge is the tool; the perm is the hold. This is how many investors add value before locking in long-term financing.
Reserves scale with the deal size
Lenders want 6 to 12 months of reserves — but for a 20-unit building, that is a much larger number than for a single-family rental. Some programs let you finance the reserves into the loan; others require them liquid. Plan for this early, because reserve shortfalls are a common reason deals stall at closing.
Check your DSCR for multi-family
Most multi-family loans qualify on the DSCR. Enter the purchase price, gross rents, and operating costs to see your DSCR ratio, monthly cash flow, and the largest loan a 1.0 DSCR supports at your rate.
DSCR Calculator
Debt Service Coverage Ratio = monthly rent ÷ PITIA (P&I + taxes + insurance + HOA). Lenders want 1.0 or higher.
DSCR Ratio
1.01
Meets the 1.0 minimum
Max loan at DSCR = 1.0
With this rent and rate, the largest loan a 1.0 DSCR supports is $283,175 — a max purchase price of $353,969.
Important Note
DSCR loans are Non-QM. No personal income or tax returns are used. LTV, reserves, and minimum DSCR vary by lender; many require 1.0–1.25.
Who a multi-family or commercial loan fits best
- Investors buying or refinancing a 5 to 20 unit apartment building.
- Investors scaling to 20+ unit properties with agency or non-agency financing.
- Investors acquiring mixed-use properties (retail + residential).
- Portfolio investors bundling 2 to 10+ properties under a single blanket loan.
- Investors using a bridge-to-perm strategy to stabilize a value-add property.
Frequently asked questions
Most lenders want 1.0 to 1.25 — the property's NOI covers the debt service with a margin. A DSCR of 1.0 means the income exactly covers the mortgage; 1.25 means there is 25% cushion. Higher DSCR (1.3+) unlocks better pricing and terms. If a property sits below 1.0, a bridge or value-add loan can work while you improve the NOI.
Educational content only. This page is not financial, legal, or tax advice, a commitment to lend, or an offer of credit. Program requirements and terms vary by lender and change over time; figures cited reflect the sources below as of the dates noted, and eligibility always depends on your full financial profile. Liuver Duran, NMLS #2579601. Sociable Mortgage LLC, NMLS #2498240. Equal Housing Opportunity.
Sources
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