Fixed-rate commercial real estate loans are priced on the assumption that the lender will receive contractual interest payments for the full loan term. When a borrower prepays early, the lender receives the principal but loses the interest stream and faces reinvestment risk; finding an equivalent return may be impossible if market rates have fallen since origination.
Defeasance and yield maintenance are the two primary mechanisms lenders use to protect against this harm. Both appear as standard provisions in CMBS loans and many institutional commercial mortgages, and understanding them is essential for any borrower contemplating a sale or refinancing before maturity.
Yield maintenance compensates the lender for lost yield. The borrower pays a make-whole premium equal to the present value of the difference between the contractual interest rate and the reinvestment rate, typically the Treasury rate for the period matching the remaining loan term, discounted at the same Treasury rate.
If the borrower carries a 6.5% loan with three years remaining and the three-year Treasury is at 4.5%, yield maintenance compensates the lender for the 200 basis point differential over the remaining term, discounted to present value. Most yield maintenance provisions include a floor, commonly 1% of the outstanding principal balance, so the borrower always pays at least a minimum penalty even in a rising rate environment where the contractual rate is below market and the standard formula would produce zero or negative premium.
Defeasance does not prepay the loan; it replaces the real estate collateral with a portfolio of US government securities structured to produce cash flows that exactly match the remaining scheduled loan payments. The borrower purchases a Treasury bond or agency securities portfolio, pledges it to the lender as substitute collateral, and receives a release of the mortgage lien on the property.
The lender continues to receive exactly the cash flows it was contractually promised, now from default-free government securities rather than real estate income. The property is released from the lien and can be sold or refinanced without triggering any further obligation under the original loan.
The cost of defeasance is the market price of the qualifying securities portfolio minus the outstanding loan balance; in a low-rate environment, this can be very expensive because Treasury bonds yield less than the loan's contractual rate and must therefore be purchased at a premium.
CMBS loans almost universally require defeasance rather than yield maintenance because the structural requirements of a CMBS trust, with its pass-through certificate mechanics and strict payment waterfall, make yield maintenance payments legally and operationally complex to handle within the trust structure. Life company loans and some bank loans use yield maintenance.
Borrowers considering a sale or refinancing need to calculate the applicable prepayment cost early in the underwriting process, because this cost can be material enough to determine whether a transaction makes economic sense, affect the net proceeds to the seller, or determine which bid wins in a competitive property sale. Most loans have an open prepayment window, typically the final three to six months before maturity, during which the borrower can repay without penalty, and many borrowers time dispositions to align with this window to eliminate the prepayment cost entirely.
Yield maintenance is a make-whole fee that lets the borrower pay the loan off early while leaving the lender in roughly the position it would have been in had the loan run to term. The premium is the present value of the difference between the loan's contractual interest and what the lender can now earn reinvesting at a matching-term Treasury rate, discounted at that same rate.
For example, on a 6.5% loan with three years left when the three-year Treasury is 4.5%, the borrower compensates the lender for roughly the 200 basis point differential over the remaining term, discounted to present value. Most provisions add a floor, commonly 1% of principal, so the borrower always pays at least a minimum penalty even when rates have risen and the raw formula would produce little or nothing.
Defeasance does not repay the loan. Instead the borrower buys a portfolio of US government or agency securities structured so its cash flows exactly match the loan's remaining scheduled payments, pledges that portfolio to the lender as substitute collateral, and receives a release of the mortgage lien on the property.
The lender keeps receiving the same promised payments, now from default-free securities rather than real estate, and the freed property can be sold or refinanced. The cost is the market price of the qualifying securities minus the outstanding loan balance; in a low-rate environment the securities must be bought at a premium, which can make defeasance expensive.
CMBS conduit loans almost universally require defeasance because the trust's pass-through certificate mechanics and payment waterfall make a cash yield-maintenance prepayment awkward to administer. Life-company loans and many bank loans use yield maintenance, and some loans instead use a simpler step-down (declining percentage) penalty.
Neither cost is trivial, so borrowers should price the applicable prepayment amount early in any sale or refinancing analysis: it can change net proceeds to a seller, decide which bid wins a competitive sale, or determine whether a refinancing pencils at all.
Yield maintenance is a prepayment penalty on a fixed-rate commercial loan that makes the lender whole for interest it loses when the borrower repays early. The borrower pays the present value of the difference between the loan's contract rate and a matching-term Treasury reinvestment rate, usually subject to a minimum floor such as 1% of the balance.
Defeasance is a prepayment-protection mechanism in which the borrower replaces the real estate collateral with a portfolio of US government or agency securities that reproduces the loan's remaining payments. The mortgage lien is released and the property can be sold or refinanced, while the loan legally stays outstanding and the lender continues to receive its scheduled cash flows.
Yield maintenance pays the loan off and compensates the lender for lost interest with a make-whole fee, so the loan is retired. Defeasance keeps the loan alive by swapping the property collateral for a matching portfolio of government securities, so the loan is not repaid, the lien is released, and the securities service the debt to maturity.
A step-down penalty is a fixed, declining schedule of percentages of the balance (for example 5% in year one, then 4%, 3%, and so on) that does not depend on interest rates. Yield maintenance instead ties the penalty to the interest-rate differential between the loan and Treasuries, so it can be much larger than a step-down when rates have fallen since origination.
CMBS loans are held in a securitization trust that passes fixed cash flows through to bondholders in a strict waterfall. A cash yield-maintenance prepayment would disrupt those mechanics, so CMBS loans generally require defeasance, which substitutes government securities that keep the promised payment stream flowing to the trust unchanged.
Defeasance cost is the market price of the government securities needed to replicate the loan's remaining payments, minus the outstanding loan balance, plus transaction and advisory fees. When Treasury yields are below the loan's contract rate the securities must be bought at a premium, which can make defeasance expensive; when yields sit above the contract rate the cost falls and can even turn slightly negative.
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