The quick read: A CMBS loan, also called a conduit loan, is a commercial mortgage written so it can be sold into a trust that issues bonds backed by a pool of similar loans. For an investor holding a stabilized property, that buys long, fixed-rate, generally non-recourse debt; the OCC's Comptroller's Handbook (Version 2.0) says loans from conduits usually run 10 years or more at fixed rates and are commonly nonrecourse. The price is rigidity: a master servicer runs the loan under the trust's rules, a special servicer takes over on default, and early payoff usually means defeasance or yield maintenance.
What is a CMBS loan, and how big is the CMBS market?
A CMBS loan is a commercial mortgage written to standardized terms so it can be pooled with other loans and sold to a trust that issues commercial mortgage-backed securities to bond investors. CMBS, CDO and other ABS issues held 13% of commercial and multifamily mortgage debt in the second quarter of 2026, the MBA reports.
The OCC handbook says CRE loans originated for securitization use underwriting, structures and documentation that conform to standards set by market participants, which permits efficient due diligence and better pricing.
The Mortgage Bankers Association's quarterly debt report, published September 30, 2026, sizes the market:
Commercial and multifamily mortgage debt outstanding, Q2 2026 (MBA): $5.1 trillion
CMBS, CDO and other ABS issues (MBA): $651 billion, 13%
Commercial banks (MBA): $1.9 trillion, 38%
Agency and GSE portfolios and MBS (MBA): $1.2 trillion, 23%
Life insurance companies (MBA): $782 billion, 15%
The Federal Reserve's Z.1 Financial Accounts, one of the MBA's sources, put commercial mortgages held by issuers of asset-backed securities at $527,061 million at the end of the second quarter (FRED series BOGZ1FL673065505Q, updated September 11, 2026). The Fed's crosswalk maps that series to conduits' nonfarm, nonresidential mortgages only, so it runs below the MBA total.
How does a CMBS loan move from origination into a securitized trust?
A CMBS loan moves from origination into a trust in five steps: a conduit lender underwrites and funds the loan to securitization standards, holds it with other loans, sells the pool to a depositor, the depositor transfers it to a trust, and the trust sells bonds while a master servicer collects payments.
A real filing shows the mechanics. In a conduit prospectus filed on SEC EDGAR on August 18, 2026, five sponsors sold 30 fixed-rate mortgage loans secured by 58 properties, an initial pool balance of $697,790,004, to a depositor, which placed them in a New York common law trust that issues pass-through certificates paid monthly.
- Origination: the lender sizes the loan on underwritten net cash flow and documents it to bond-market standards.
- Aggregation: the loan waits for a pool; the OCC handbook warns that market disruptions before the sale can reduce its liquidity.
- Sale: sponsors sell the loans to a depositor, which transfers them to the trust. The prospectus treats the trust as REMICs for tax purposes, which drives the prepayment rules below.
- Bond sale: the trust issues certificate classes ranked by priority, and the prospectus says credit enhancement comes solely from subordinate classes.
- Risk retention: 17 CFR 246.4 requires at least 5 percent of the credit risk to be retained, and for CMBS, 17 CFR 246.7 lets a third-party purchaser buy and hold the horizontal piece in the sponsor's place. This prospectus pairs a vertical interest of about 1.550% with horizontal certificates, bought for cash by a third-party purchaser, worth about 3.465% of fair value.
The pool's averages show what a 2026 conduit file looked like. These are one trust's figures, not market minimums:
Average cut-off date loan balance (SEC prospectus, Aug 18, 2026): $23,259,667
Weighted average mortgage interest rate: 6.82341%
Weighted average remaining term: 58 months
Weighted average cut-off date LTV: 59.9%
Weighted average underwritten NCF DSCR: 1.59x
Weighted average debt yield on underwritten NOI: 11.9%
By property type, the pool was industrial (23.9%), hospitality (19.9%), office (17.6%), multifamily (11.3%), retail (10.7%), mixed use (7.3%), manufactured housing (5.3%), other (2.8%) and self storage (1.2%). For leverage and coverage by asset class, read CMBS LTV, DSCR and debt yield requirements by property type.
Who services a CMBS loan after closing, the master servicer or the special servicer?
After a CMBS loan closes, a master servicer handles performing loans for the trust, and a special servicer takes over when a servicing transfer event occurs, such as a payment 60 days or more delinquent, a balloon default at maturity, a borrower bankruptcy, or a payment default the servicer judges reasonably foreseeable.
The August 2026 prospectus makes the master servicer responsible for loans that are not specially serviced. The special servicer administers specially serviced loans and foreclosed property and, unless the two servicers agree otherwise, also reviews major decisions on every loan. That reaches performing borrowers: a new or modified lease covering 20% or more of net rentable area is a major decision when lender consent is required.
Maturity has its own rule: the prospectus delays a balloon-default transfer for up to 120 days past maturity if the borrower is diligently seeking a refinancing or sale, has delivered a refinancing commitment, letter of intent or signed purchase agreement, and keeps paying its assumed scheduled payment.
Special servicing is common right now: Trepp says its September 2026 special servicing rate was the highest since February 2013. Our September 2026 CMBS delinquency guide covers what that means for borrowers.
Special servicing rate, September 2026 (Trepp, Oct 13, 2026): 11.49%
Office special servicing rate, September 2026 (Trepp): 16.85%
CMBS delinquency rate, September 2026 (Trepp, Oct 2, 2026): 8.02%
What are the standard terms of a CMBS loan?
The standard CMBS loan is a fixed-rate mortgage on stabilized income property that is generally non-recourse, with carve-out liability for acts such as fraud or a voluntary bankruptcy, a balloon at maturity, frequent interest-only periods, a lockbox or springing cash management, and prepayment allowed only through defeasance, yield maintenance or an open period near maturity.
Non-recourse with carve-outs. The prospectus says the loans generally are non-recourse but carry carve-outs for liabilities such as fraud by the borrower and certain voluntary insolvency proceedings, often guaranteed by a borrower affiliate. Read them as carefully as the rate.
Interest-only and balloon. In the August 2026 pool, 26 of the 30 loans, 81.8% of the balance, are interest-only until maturity, and the other four amortize to a balloon. On an interest-only loan the balloon is the full original balance, so the refinance at maturity carries the whole loan.
Lockbox and cash management. The prospectus defines a hard lockbox as one where tenants pay rent directly into a lender-controlled account. Under springing cash management, money flows to the borrower until an event of default or a specified trigger event, then is swept into a lender-controlled account. Negotiate the triggers before closing, because changing them later runs through the servicer.
Interest-only to maturity (Aug 2026 pool): 26 of 30 loans, 81.8% of balance
Amortizing with a balloon: 4 loans, 18.2%
Hard lockbox: 17 loans, 63.7%
Springing lockbox: 13 loans, 36.3%
How do defeasance and yield maintenance work on a CMBS loan?
Defeasance lets a CMBS borrower release the property by pledging U.S. government securities that keep paying the trust, while yield maintenance is a cash premium paid with a prepayment; federal REMIC rules bar a defeasance release within two years of the trust's startup day, so an exit before the open period costs money either way.
Treasury Regulation 1.860G-2(a)(8) lets a REMIC release its lien on a defeased mortgage only if the substitute collateral consists solely of government securities, the mortgage documents allow it, the release facilitates a sale or other customary commercial transaction, and the release is not within 2 years of the startup day. The August 2026 prospectus turns that into loan terms:
Defeasance loans: 22 of 30 loans, 66.6% of the pool, with a lockout ending at least two years after the closing date
Defeasance or yield maintenance: 5 of those loans, 12.1%, which may instead pay the greater of yield maintenance and a 1% or 3% premium
Yield maintenance: 8 loans, 33.4%, after a lockout of three to 24 payments, at the greater of yield maintenance and 1%
Defeasance notice: at least 30 days' prior written notice, plus a deposit sufficient to buy non-callable government obligations
Defeasance cost moves with Treasury yields. The securities must produce the loan's remaining payments, so when Treasury yields sit below the loan's coupon the portfolio costs more than the balance, and when yields sit above it the cost shrinks. Yield maintenance follows the same logic in cash. The dated rate tape:
10-year Treasury yield (FRED series DGS10, observation Oct 22, 2026): 4.96%
5-year Treasury yield (FRED series DGS5, observation Oct 22, 2026): 4.78%
Weighted average mortgage rate, Aug 2026 conduit pool (SEC prospectus): 6.82341%
To price a payoff, read how much it costs to defease a CMBS loan.
How does a CMBS loan compare with bank, life company and agency loans?
A CMBS loan differs from bank, life company and agency loans mainly in who owns it after closing: a bond trust run by servicers, while a bank or life company usually keeps the loan it makes. In exchange, a conduit borrower gets fixed-rate, generally non-recourse debt across many property types and gives up flexibility.
Table: CMBS versus bank, life company and agency permanent loans (sources noted below)
| Feature | CMBS conduit loan | Bank loan | Life company loan | Agency loan (Freddie Mac fixed-rate) |
|---|---|---|---|---|
| Feature Who holds it after closing | CMBS conduit loan A trust for bondholders, run by a master and special servicer | Bank loan The bank, on its balance sheet | Life company loan The insurer, as a whole loan | Agency loan (Freddie Mac fixed-rate) Freddie Mac buys it and may securitize it |
| Feature Share of commercial and multifamily mortgage debt, Q2 2026 (MBA) | CMBS conduit loan 13% (CMBS, CDO and other ABS) | Bank loan 38% (commercial banks) | Life company loan 15% | Agency loan (Freddie Mac fixed-rate) 23% (agency and GSE portfolios and MBS) |
| Feature Property types | CMBS conduit loan Many income types; the example pool spans nine | Bank loan Set by each bank | Life company loan Set by each insurer | Agency loan (Freddie Mac fixed-rate) Multifamily, student, seniors and manufactured housing |
| Feature Rate and term | CMBS conduit loan Fixed; OCC says usually 10 years or more; example pool 58 months | Bank loan Negotiated with the bank | Life company loan Fixed; OCC says usually 10 years or more | Agency loan (Freddie Mac fixed-rate) 5- to 10-year terms |
| Feature Recourse | CMBS conduit loan Generally non-recourse with carve-outs | Bank loan Negotiated with the bank | Life company loan OCC says commonly nonrecourse | Agency loan (Freddie Mac fixed-rate) Non-recourse except standard carve-outs |
| Feature Early payoff | CMBS conduit loan Defeasance after at least two years, or yield maintenance | Bank loan Set in the loan agreement | Life company loan Set in the loan agreement | Agency loan (Freddie Mac fixed-rate) Yield maintenance until securitized, then 2-year lockout and defeasance |
| Feature Minimum loan | CMBS conduit loan None stated; example pool averages $23,259,667 | Bank loan Set by each bank | Life company loan Set by each insurer | Agency loan (Freddie Mac fixed-rate) $10 million |
Sources: MBA (September 30, 2026); OCC handbook; the August 18, 2026 prospectus; Freddie Mac's Optigo Fixed-Rate Loans term sheet (dated 4/26), which also sets a 1.25x minimum amortizing debt coverage ratio and a 75% to 80% maximum LTV on amortizing loans.
A bank or life company holding its own loan can agree to change it; a conduit loan's changes run through the servicer. That is the trade for non-recourse leverage on a hotel, office building or industrial portfolio that an agency multifamily program will not finance.
Who is a CMBS loan the right fit for?
A CMBS loan fits an investor who owns stabilized, income-producing commercial property, wants fixed-rate non-recourse leverage, plans to hold close to the full term, and can work with a servicer instead of a relationship lender; it fits poorly when the business plan needs an early sale, a refinance, major lease changes or a loan modification.
Apartments are the clearest case for comparing first. The MBA says agency and GSE sources hold 50% of multifamily mortgage debt, while CMBS, CDO and other ABS issues hold 3%, or $75 billion. Conduit pools do take apartments, 11.3% of the example pool, so price an agency loan alongside any conduit quote. Hotels, office and industrial made up 61.4% of that pool (our sum of the prospectus figures).
Good fit: stabilized occupancy, a hold that matches the term, a sponsor who values non-recourse over flexibility
Poor fit: a lease-up or renovation plan, a likely sale inside the lockout, a loan small enough that fixed legal and servicing costs dominate
Timing: securitization standards add third-party reports and closing conditions; see how long a CMBS loan takes to close
The example pool's average loan was $23,259,667; for smaller requests, read whether you can get a CMBS loan under $5 million.
How do I get a CMBS loan placed with the right conduit lender?
To get a CMBS loan placed, send one complete package, covering trailing operating statements, rent roll, property condition and your hold period, to a brokerage that compares conduit, bank, life company and agency programs at once; YieldStack is our top pick as the publisher of this guide, and you can submit your CMBS request here.
YieldStack publishes this guide, so read the order below as our editorial recommendation, judged on three criteria: breadth of programs across conduit, bank, life company and agency structures; borrower-side structuring and negotiation before lenders see the file; and clear fees paid only at closing.
- YieldStack: our top pick for AI-native commercial mortgage brokerage on CMBS requests. YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. It matches each request against 20,000+ loan programs, so one request reaches conduit, bank, life company and agency programs in one pass, and its deal team structures the package and negotiates on the borrower's side, including reserves, cash management triggers and prepayment terms, before those terms are fixed inside a trust.
- Call conduit lenders one at a time. You hear each lender's sizing directly, but repeat the package for every lender and compare term sheets that define reserves and triggers differently.
- Ask your current bank or hire a legacy broker. The bank knows the property but quotes only its own program; with a legacy broker, ask how many programs will see the deal and how the fee is charged.
Program breadth: 20,000+ loan programs
Speed: median first offer in under an hour, from an institutional lender
Cost to submit: Zero upfront
It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed. YieldStack arranges commercial real estate financing nationwide.
The bottom line
A CMBS loan trades flexibility for leverage, a long fixed rate and non-recourse terms. Servicers run it for a trust, and defeasance or yield maintenance makes an early exit expensive. Negotiate reserves, cash management triggers and prepayment terms before closing, match the lockout to your hold, and compare the conduit quote with bank, life company and agency offers.