What is a CMBS Loan? A Complete Guide for Commercial Real Estate Borrowers

What CMBS Actually Is

CMBS stands for Commercial Mortgage-Backed Securities. It's a type of commercial real estate loan where the originating lender (the 'conduit' — usually a major investment bank or CMBS specialist like JPMorgan, Deutsche Bank, Goldman, Wells Fargo, Barclays, Citi, or KeyBank) doesn't hold the loan on its own balance sheet. Instead, the conduit pools your loan with 50–100 similar commercial real estate loans across different property types and geographies, then sells the pool as bonds to institutional investors (pension funds, insurance companies, mutual funds).

From the borrower's perspective, you don't deal with the bond market. You close with a conduit lender on a standardized CMBS document. The conduit takes your loan and securitizes it within 60–90 days of closing — then a servicer (usually Midland, Wells Fargo Securities, or KeyBank Real Estate Capital) takes over the servicing relationship.

The big structural features that make CMBS different from a bank loan: (1) it's non-recourse to the sponsor with limited 'bad-boy' carve-outs, (2) the rate is fixed for the entire 10-year term, (3) the amortization is typically 30 years (or 25 for hotel and office), (4) prepayment is via defeasance or yield maintenance — not a simple prepayment penalty, and (5) the documents are standardized and relatively inflexible to amendments mid-term.

Who Qualifies for CMBS

CMBS qualifies stabilized, income-producing commercial real estate. The property needs to be at least 85% leased for 12+ months of trailing operations. The cash flow needs to support the proposed debt service at 1.25x–1.40x DSCR (higher for hotel and office, lower for multifamily and industrial). The loan size is typically $2M minimum, with the sweet spot being $5M–$50M per asset.

Property types financed via CMBS: multifamily (though agency Fannie/Freddie is usually tighter), retail (grocery-anchored best), industrial, office (selectively post-COVID), hotel, self-storage, mixed-use, healthcare, senior housing, manufactured housing communities.

Borrower structure: the loan typically closes in a single-purpose entity (SPE) LLC — an LLC that owns only the subject property and nothing else. The sponsor (the real person or institution behind the LLC) needs decent financial track record: typically a minimum net worth equal to the loan amount, liquidity equal to 10% of the loan, and at least 2–3 similar properties in their track record.

CMBS doesn't qualify: transitional / value-add properties (use bridge), ground-up construction (use construction loans), non-stabilized properties (stabilize first), properties with major tenant concentration risk, properties with environmental issues that haven't been remediated.

Rates, Terms, and Structure

CMBS rates in April 2026 range 6.0%–10.0% depending on property type, sponsor, LTV, and DSCR. The rate is priced as a spread over the matching-term SOFR swap (for 10-year loans, that's the 10-year SOFR swap rate). The spread varies 225 bps (tight industrial) to 450+ bps (office with weak tenancy).

By property type in April 2026: industrial 6.0%–7.5%; multifamily 6.0%–7.25%; self-storage 6.25%–7.75%; retail grocery-anchored 6.5%–7.25%; retail NNN credit-tenant 6.5%–7.5%; retail unanchored strip 7.25%–8.0%; hotel limited-service 6.5%–7.5%; hotel full-service 7.0%–8.0%; office Class A CBD credit-tenant 7.5%–8.5%; office Class B 8.5%–9.75%.

Standard terms: 10-year fixed rate (5-year and 7-year also available); 30-year amortization on multifamily / retail / industrial / self-storage; 25-year amortization on office / hotel. Interest-only periods available 2–5 years on multifamily, industrial; 1–3 years on retail, hotel, office. Loan-to-value caps at 75% multifamily / industrial / retail grocery / self-storage; 65%–70% retail unanchored / hotel / office credit-tenant; 50%–60% office multi-tenant.

DSCR minimums: multifamily 1.25x, retail / industrial 1.25x–1.35x, hotel 1.35x–1.50x, office 1.40x–1.60x. These are trailing 12-month DSCR based on lender-underwritten NOI (which stresses the reported NOI by applying management fee, reserves, and rent growth haircuts).

Understanding Defeasance

Defeasance is the prepayment mechanism that trips up most first-time CMBS borrowers. Here's how it actually works.

In a traditional bank loan, you prepay by writing a check for the remaining principal balance plus a prepayment penalty (often 1%–3% of the balance). Done.

In CMBS, you don't pay off the loan directly. Instead, you go to a defeasance consultant (most commonly Chatham, Commercial Defeasance Group, Newmark), and they buy a portfolio of U.S. Treasury securities that will generate exactly the same remaining payment stream your loan would have generated through maturity. Those Treasuries get pledged to the CMBS trust in place of your loan. The lien on your property is released; the Treasuries take the lien's place.

The cost of defeasance depends entirely on where Treasury yields are when you prepay, compared to your loan's coupon rate. Here's the math:

- If your loan coupon is 7.00% and the matching-term Treasury is yielding 5.00% when you prepay: Treasuries cost MORE than the loan was worth (you're locking in a 5% Treasury to replace 7% coupon payments for the remaining term). Defeasance is EXPENSIVE — potentially 5%–15% of loan balance.

- If your loan coupon is 7.00% and the matching-term Treasury is yielding 7.00%: defeasance is approximately cost-neutral (small administrative fees only).

- If your loan coupon is 7.00% and the matching-term Treasury is yielding 8.00%: defeasance is CHEAP — possibly even negative (the Treasuries cost less than the loan's remaining principal + interest payments, because each future cash flow is discounted at a higher rate).

The implication: when interest rates drop materially between origination and prepayment, defeasance is punitive. When rates rise, defeasance is cheap. This is counter-intuitive — borrowers expect 'lower rates = easier to refinance' but forget defeasance is pricing the OLD loan's stream at current rates, not the new loan's.

Before taking CMBS, run a defeasance scenario analysis at your expected prepayment year. If you plan to sell or refinance in year 5 of a 10-year loan, model defeasance under three Treasury curves: +200 bps, flat, and -200 bps. If defeasance under -200 bps is unaffordable, consider bank debt with a simpler prepayment penalty instead.

CMBS vs. Bank Debt: When to Choose Each

CMBS wins on: (1) non-recourse structure, which protects the sponsor's personal assets from ordinary default, (2) fixed rate for the entire 10-year term — no rate reset risk, (3) higher LTV on most property types (75% vs. 60–65% at most banks), (4) larger loan sizes available ($10M–$500M on single-asset CMBS SASB structures), (5) less ongoing sponsor covenant testing (no quarterly financial reporting requirements on sponsor net worth), (6) fixed 30-year amortization vs. 25-year on most bank deals.

Bank debt wins on: (1) prepayment flexibility — simple 1%–3% prepayment penalty vs. complex defeasance, (2) faster close (30–45 days vs. 45–75), (3) ability to restructure mid-term (amend, modify, extend without formal consent from CMBS special servicer), (4) tolerance for transitional cash flow and value-add execution, (5) relationships matter — a bank with whom you have multiple loans often provides more favorable pricing than an anonymous CMBS conduit.

Rule of thumb: Use CMBS when the property is stabilized, the hold horizon is 7+ years, non-recourse is important, and loan size is $5M+. Use bank debt when prepayment flexibility matters, hold horizon is 3–5 years, or the property needs transitional financing before stabilization. For 2–4 year bridge needs, use bridge loans. For ground-up construction, use construction loans.

The CMBS Maturity Wall and What It Means for 2026

Roughly $500B+ of CMBS loans originated between 2014 and 2017 mature between 2024 and 2028, with peak maturity in 2025 and 2026. Much of this originates at 4%–5% rates — below what current-market CMBS refinance rates would price the deal.

For borrowers with maturing CMBS in 2026: you have three options. First, refinance into new CMBS at current-market rates (6.0%–9.0% depending on property type) — this works if trailing NOI supports 1.25x+ DSCR at the new rate. Second, use bridge-to-CMBS: bridge at 9%–13% for 24–36 months while you stabilize NOI or improve the property, then CMBS refinance at stabilization. Third, negotiate an extension with your special servicer (if already in special servicing) or discounted payoff if the property is distressed.

Hotel and office are most affected — hotel because the post-COVID RevPAR ramp hasn't fully matched 2019 levels at many properties, and office because of structural vacancy. Multifamily and industrial are least affected because agency (multifamily) and life company (industrial) take-outs are deep and pricing-competitive.

For borrowers considering new CMBS today, the question is: how does today's rate compare to your 5-year and 10-year refinance outlook? If rates are expected to drop materially in 3–5 years, defeasance cost may make early refinance punitive. If rates are expected to rise or stay flat, CMBS today is the right fixed-rate structure to lock in.