CMBS vs Bank Financing for CRE: Which to Choose

Two lenders quoted the same deal. The bank offered $9.2 million at a floating rate with no prepayment penalty after year two. The CMBS lender offered $10.8 million fixed at a lower spread — but with a yield maintenance penalty for the full 10-year term.

The borrower sold the property in year four. The yield maintenance penalty was $1.4 million.

The proceeds advantage evaporated. The CMBS loan cost more on net. But if the borrower had held for the full 10 years, the CMBS rate advantage would have saved more than the penalty cost. Two correct decisions — with opposite outcomes depending on the exit.

Choosing between CMBS and bank financing is not a rate comparison. It is a structure decision. Here is how to think through it.

What CMBS financing is

CMBS stands for commercial mortgage-backed securities. A CMBS loan is originated by a lender, then sold into a securitized trust with thousands of other commercial mortgages. Investors buy bonds backed by the pool. The trust is managed by a servicer — a separate entity from the originator.

Key implications:

• The originator cannot modify the loan after securitization. All loan changes go through the servicer, who is bound by the pooling and servicing agreement (PSA), which is designed to protect bondholders, not borrowers.
• Underwriting is non-recourse. The borrower is not personally liable beyond the property and agreed-upon carve-outs (the "bad boy" guaranty).
• Proceeds are sized to the pool's required credit standards, governed by CREFC market conventions and rating agency requirements — not the originator's discretion.

What bank/portfolio financing is

A bank or portfolio lender keeps the loan on its own balance sheet. The same institution that underwrites the deal services it for the entire term. No securitization, no PSA, no rating agency constraints.

Key implications:

• Recourse, typically. Most bank commercial real estate loans include a personal guaranty or partial recourse from the principals.
• Flexibility. The lender can modify loan terms, grant extensions, adjust covenants, or waive defaults through a direct relationship — subject to regulatory constraints.
• Balance sheet concentration limits. FDIC regulations on CRE concentrations and Federal Reserve capital adequacy rules constrain how much exposure a bank can carry in commercial real estate — which is why banks periodically pull back from certain property types or markets.

The underwriting comparison

When CMBS wins

Higher proceeds on stabilized assets. CMBS underwriting is calibrated to securitization pool standards, which typically allow higher LTV and lower debt yield floors on stabilized income properties than bank credit policies. A property that produces 9.2% debt yield might clear a CMBS program at 65%–70% LTV but only get 60%–65% LTV from a bank that applies more conservative capital requirements.

Long-term rate certainty. A 10-year fixed-rate CMBS loan provides complete certainty on financing cost for a decade. On a stabilized property with long-term leases, locking the financing cost for the same duration as the income stream eliminates refinancing risk and interest rate exposure simultaneously.

Non-recourse structure. For investors who want to firewall personal liability, CMBS non-recourse financing limits exposure to the property itself. The carve-outs (fraud, environmental, misappropriation of insurance proceeds) are meaningful but narrow.

NNN credit tenant properties. CMBS is exceptionally well-suited for single-tenant NNN properties with long-term creditworthy tenants. The income is predictable, the tenant is underwritable, and the securitization pool treats investment-grade credit tenant income as highly reliable.

When bank wins

You need flexibility. If there is any chance you modify the business plan, sell the asset before term, or encounter a lease expiration that requires loan modification, a bank relationship is dramatically preferable. A CMBS servicer's job is to protect bondholders per the PSA. A bank's relationship manager's job is to keep your business.

Short hold period. If your exit is within 3–5 years, the CMBS prepayment penalty often exceeds the rate advantage. Defeasance costs — buying a Treasury portfolio to substitute for the loan cash flows — can be substantial when you exit early in a high-rate environment. A bank loan with a step-down prepayment and clean exit after year 2–3 preserves the gain on sale.

Transitional asset. Any property in transition — value-add, partial vacancy, short lease terms — will either be declined by CMBS or underwritten at a very conservative level. Banks and portfolio lenders have more discretion to underwrite to-be-stabilized income with appropriate reserves and cash management structures.

Property types CMBS avoids. CMBS programs have pulled back sharply from office, certain retail formats, and hospitality. Banks with strong relationship borrowers in these sectors may still finance assets that CMBS cannot touch — at higher debt yield floors and with recourse, but financeable.

The CMBS prepayment reality

CMBS loans typically include one of two prepayment structures:

Yield maintenance: The borrower pays the difference between the loan's contract rate and the Treasury rate for the remaining term, applied to the outstanding balance. In a falling-rate environment (when Treasury rates drop below the loan rate), yield maintenance is expensive. In a rising-rate environment (when Treasury rates rise), it can be minimal — sometimes almost nothing.

Defeasance: The borrower purchases a portfolio of Treasury or agency securities that generate cash flows matching the remaining loan payments. The cost depends on current Treasury rates. Defeasance in a high-rate environment is less expensive than defeasance in a low-rate environment.

Both structures are designed to make the securitization trust whole — the borrower cannot simply repay the loan because that would leave the trust with cash it needs to reinvest at potentially lower rates.

For a 10-year CMBS loan originated at 6.5%, defeasance or yield maintenance in year 4 (with 6 years remaining) can cost 2%–6% of the outstanding balance depending on rate movements. A $10 million loan could carry $200,000–$600,000 in exit costs. Model this explicitly before choosing CMBS over a bank loan with a 1%–2% prepayment step-down.

The role of debt yield in CMBS vs bank decisions

CMBS underwriting is more rigidly debt-yield-driven than bank underwriting because the rating agencies that rate CMBS bonds require debt yield tests as part of their credit analysis. CREFC conventions standardize how debt yield is calculated across the pool, which means CMBS originators cannot deviate from the formula the way a bank credit officer might apply discretion.

Bank underwriting is relationship- and DSCR-weighted. Banks use debt yield as one of several checks, but the primary conversation is usually DSCR and LTV. A bank credit officer who knows the borrower's track record and portfolio exposure may approve a deal at a debt yield that a CMBS program would decline.

For more on CMBS-specific debt yield requirements and how those floors are set, that post covers the CREFC standards in detail. For the debt yield formula itself and how it compares to DSCR, see Debt Yield vs DSCR.

Use the debt yield calculator to run both your CMBS and bank proceeds scenarios side-by-side before committing to a lender.

Frequently asked questions

Can I refinance out of a CMBS loan into a bank loan during the term? Yes, but it triggers defeasance or yield maintenance. The cost depends on how much of the loan term remains and where rates are at the time. If you have reason to believe you will want to refinance mid-term — to tap equity, to modify the loan for a new tenant, or to sell the property — factor the prepayment cost into your CMBS analysis before closing.

What is a B-piece buyer and why do they matter in CMBS? In CMBS securitization, the loans are split into senior bonds (AAA through investment grade, sold to broad institutional investors) and subordinate bonds (the B-piece or first-loss piece, typically retained by a specialized buyer). The B-piece buyer reviews every loan in the pool before securitization and can kick out loans they find too risky. If your loan is kicked, it either gets modified to clear the B-piece buyer's concerns or exits the pool entirely. B-piece buyer objections are rare but consequential — they occur on loans where the credit looks marginal on close examination.

Are there hybrid loan structures between CMBS and bank? Yes. Life company loans are a common middle ground: fixed-rate, long-term (10–20 years), non-recourse in many cases, but held on a life insurance company's balance sheet with more flexibility than CMBS securitization requires. Life companies historically focus on best-in-class stabilized assets with conservative LTV and strong credit. Mortgage Bankers Association data tracks life company, bank, CMBS, and agency lending volumes quarterly.

Do CMBS loans require personal guaranties? CMBS loans are typically non-recourse except for standard carve-outs: fraud, intentional misrepresentation, environmental liability, misappropriation of insurance or condemnation proceeds, failure to maintain insurance, unauthorized transfers. These "bad boy" carve-outs can become recourse if triggered, but they are narrow and generally avoidable. Bank loans almost universally include a full or partial personal guaranty.

Can the same property work for both CMBS and bank financing? Yes — and running both to term sheet simultaneously is often the best strategy. Different lenders may quote very different proceeds and terms on the same property. Having competitive quotes from a CMBS program and a bank puts you in a position to choose based on the actual numbers rather than assumptions about which is better.