Yield maintenance is a commercial mortgage prepayment penalty that compensates a lender for interest it loses when a borrower repays early. The fee equals the present value of the loan's remaining payments, discounted at a Treasury yield matched to the remaining term, less the outstanding balance. It guarantees the lender the yield it expected through maturity.
How Does Yield Maintenance Work?
Yield maintenance works by charging a borrower who prepays the present value of the interest the lender would have earned had the loan run to maturity. The penalty is calculated as the present value of the remaining payments, discounted at a Treasury yield matched to the remaining term, minus the outstanding principal. It ensures the lender's original yield is preserved.
Per Commercial Real Estate Loans and CommLoan, yield maintenance is most common on CMBS loans, Fannie Mae and Freddie Mac multifamily loans, and life insurance company loans. The penalty falls as the loan approaches maturity, because fewer payments remain to discount, and it shrinks when market rates rise toward the loan coupon, because the lender can reinvest the returned principal at closer to its original yield.
Input | What it represents |
Outstanding balance | Principal being repaid early |
Loan coupon | The note's contract interest rate |
Remaining term | Months from prepayment to maturity |
Treasury yield | Reinvestment rate matched to remaining term |
Rate differential | Coupon minus Treasury yield |
Per CommLoan, if the matched Treasury yield rises above the loan coupon, the computed penalty can fall to zero, so most loan documents impose a minimum prepayment fee, commonly 1 percent of the outstanding balance, as a floor.
The Yield Maintenance Formula
Yield maintenance is the present value of the loan's remaining payments discounted at the matched Treasury yield, minus the outstanding balance. A widely used equivalent form is the present value of the lost interest differential:
Yield Maintenance = PV of remaining payments at Treasury yield - Outstanding balance
The lost-interest form makes the driver explicit:
Yield Maintenance = sum over remaining months of [ Balance x (Coupon - Treasury) / 12 ] discounted at the monthly Treasury rate
Both forms produce the same number. The penalty rises with a wider coupon-to-Treasury spread and with more months remaining, and it approaches zero as either the spread narrows or the term runs off. Per Commercial Real Estate Loans, the Treasury used is the current yield on a note whose maturity matches the loan's remaining term.
Example
A borrower wants to prepay a $6,000,000 interest-only loan at a 5.75 percent coupon with 48 months remaining. The matched 4-year Treasury yields 3.90 percent, so the rate differential is 1.85 percent. The monthly interest payment is $6,000,000 times 5.75 percent divided by 12, or $28,750.
Item | Value |
Outstanding balance | $6,000,000 |
Loan coupon | 5.75% |
Months remaining | 48 |
Matched Treasury yield | 3.90% |
Rate differential | 1.85% |
Monthly interest payment | $28,750 |
Discount the 48 remaining $28,750 payments plus the $6,000,000 balloon at the monthly Treasury rate of 3.90 percent divided by 12. That present value is approximately $6,410,485. Subtract the $6,000,000 balance, and the yield maintenance penalty is about $410,485, or 6.84 percent of the balance. The equivalent lost-interest form, present-valuing $6,000,000 times 1.85 percent divided by 12 each month, produces the same $410,485, confirming the calculation.
Variations and Edge Cases
Yield maintenance behavior depends on the rate environment, the loan documents, and where the loan sits in its term. The table covers variants an operator should confirm before pricing a prepayment.
Variant | Treatment |
Wide spread | Coupon well above Treasuries; penalty is large, the common case in falling-rate markets |
Narrow spread | Coupon near Treasuries; penalty is small |
Inverted spread | Treasury yield above coupon; computed penalty hits the 1 percent minimum floor |
Near maturity | Few months remain; penalty is small regardless of spread |
Open window | Final months usually allow prepayment at par with no penalty |
The common mistake is treating the penalty as fixed. It moves daily with Treasury yields and shrinks each month as the term runs off, so a quote from one week can be materially wrong the next. Price it close to closing and stress-test the deal economics against a rate move before committing.
Yield Maintenance vs Defeasance
Yield maintenance is often confused with defeasance, and both compensate a lender for early payoff, but they work differently. Yield maintenance is a single cash penalty equal to the present value of the lender's lost interest, after which the loan is retired. Defeasance substitutes a Treasury portfolio for the property, so the loan technically continues on paper.
The practical difference is mechanism and speed. Yield maintenance is one payment that ends the loan and is faster to execute. Defeasance is a securities transaction requiring a successor borrower, consultants, and weeks of work, though it can be cheaper in some rate environments and is often the only method a CMBS loan permits. Which applies is dictated by the loan documents, not the borrower's preference.
Frequently Asked Questions
What is yield maintenance in commercial real estate?Yield maintenance in commercial real estate is a prepayment penalty that compensates a lender for the interest it loses when a borrower repays early. The fee equals the present value of the loan's remaining payments, discounted at a Treasury yield matched to the remaining term, less the outstanding balance, preserving the lender's expected yield.
How is yield maintenance calculated?Yield maintenance is calculated as the present value of the loan's remaining payments, discounted at a Treasury yield matched to the remaining term, minus the outstanding principal. An equivalent form present-values the lost interest differential, the balance times the coupon-minus-Treasury spread, over each remaining month. Both forms produce the same penalty.
When is a yield maintenance penalty zero?A yield maintenance penalty approaches zero when the matched Treasury yield rises to meet or exceed the loan coupon, because the lender can reinvest the returned principal at its original yield. Per CommLoan, most loan documents then impose a minimum fee, commonly 1 percent of the outstanding balance, as a floor.
Is yield maintenance the same as defeasance?No. Yield maintenance is a single cash penalty that retires the loan, while defeasance substitutes a Treasury portfolio for the property so the loan continues on paper. Yield maintenance is faster to execute, but defeasance is often the only prepayment method a CMBS loan permits, and which applies is set by the loan documents.
Related Terms
Defeasance
CMBS Loan
Permanent Loan
Interest Rate Cap
Cash Out Refinance