Why It Matters
What is yield maintenance and when does it apply? Yield maintenance applies primarily to CMBS loans, Fannie Mae DUS loans, Freddie Mac multifamily loans, and life company debt. Because these lenders pool loans into securities sold to investors, prepayment disrupts the expected cash flow — yield maintenance makes the lender whole by forcing the borrower to cover the difference between the note rate and current reinvestment rates. It is triggered any time a borrower refinances, sells, or pays off the loan before maturity during the yield maintenance period.
At a Glance
- Common loan types: CMBS, Fannie Mae DUS, Freddie Mac, life company loans
- Purpose: protects the lender's expected yield if the borrower prepays before maturity
- Formula concept: present value of remaining payments at note rate minus present value at current treasury rate
- Typically expressed as a percentage of the outstanding loan balance
- Penalty can range from 5% to 15%+ of loan balance depending on timing and rate environment
- Most loans include a "lockout period" (often years 1–3) where prepayment is completely prohibited
- After the lockout, the yield maintenance period applies — sometimes followed by step-down prepayment in the final years
- Differs from defeasance: yield maintenance pays a cash penalty; defeasance substitutes treasury securities for the loan collateral
- Many loans have a minimum floor of 1% of the outstanding balance even when treasury rates approach or exceed the note rate
How It Works
When a lender originates a commercial loan, it prices the deal around an expected stream of interest payments over the full term. That stream is sold to bond investors in CMBS, or retained by a life company. If the borrower prepays, those investors lose the income they were promised. Yield maintenance forces the borrower to replace that income.
The calculation has three steps. First, project the remaining interest payments the lender expected through maturity. Second, calculate what those payments are worth if reinvested today at the comparable treasury rate. Third, the difference is the penalty:
YM Penalty ≈ (note rate − treasury rate) × remaining balance × remaining term factor (discounted)
When treasury rates are low relative to the note rate, the spread is wide and the penalty is large. When they converge, the gap shrinks — but most loan documents set a 1% floor, so the borrower rarely escapes entirely.
Loan timeline: Years 1–3 are typically a hard lockout (no prepayment under any circumstances). Years 4–9 carry yield maintenance, sometimes transitioning to a step-down schedule (e.g., 3%, 2%, 1%) in the final year or two. Borrowers must build the entire lockout and prepayment penalty window into their analysis before closing, not after a buyer appears.
Yield maintenance differs from defeasance. Under defeasance, the borrower purchases a portfolio of treasuries that replicates the original loan's cash flows — the loan stays in place, the collateral is substituted. Under yield maintenance, the borrower pays a cash penalty and retires the loan. Both make the lender whole; which applies depends on the loan documents.
Real-World Example
Kevin owns a 32-unit apartment complex in Columbus, Ohio, financed with a Fannie Mae DUS loan. He closed $2.3 million seven years ago at 4.85% fixed, 10-year term. His property manager recently retired, and buyers have been calling — it feels like the right time to sell.
His broker brings an LOI at $3.8 million. Kevin runs the numbers: pay off the $2.1 million balance, net roughly $1.6 million. Then his servicer sends the payoff quote.
The yield maintenance penalty: $147,000.
Kevin hadn't modeled it. The 3-year treasury sits at 4.22% — close to, but still below, his 4.85% note rate. That 63-basis-point spread, applied to $2.1 million over 36 remaining months and discounted to present value, produces a number that changes the deal math significantly.
His attorney puts it in perspective: "You're in good shape, actually. If you'd tried to sell in year three when rates were 200 basis points below your note, this could have been $280,000 or more."
Kevin revises his net proceeds, confirms the deal still works, and moves forward. He also makes a note for the next acquisition: get the full prepayment schedule before signing the loan commitment — not after the LOI is on the table.
Pros & Cons
- Lender receives compensation for lost interest income, enabling them to offer more competitive fixed rates at origination
- Predictable penalty structure — the formula is disclosed in loan documents, so borrowers can model it before closing
- Compared to arbitrary make-whole premiums, the treasury-based calculation is transparent and defensible
- The floor provision protects against scenarios where rising treasury rates eliminate the penalty calculation entirely
- Early exits become expensive, especially when treasury rates have fallen sharply since origination — the penalty can match or exceed a full year of net operating income
- Refinancing to capture lower rates is often uneconomical: rate savings are offset by the yield maintenance cost, eliminating the benefit
- Borrowers must underwrite exit scenarios at origination, before they know future rate environments or hold periods
- The lockout period adds a layer on top — not only is exit costly, it may be impossible for the first few years
Watch Out
Confusing yield maintenance with defeasance. The terms are sometimes used interchangeably but the structures are different. Defeasance substitutes treasury collateral while the loan stays in place; yield maintenance is a cash payment that retires the loan. Which one applies is in the loan documents — verify before assuming.
Not modeling exit costs at origination. The penalty is disclosed in the loan commitment, but borrowers often skip the math when the hold period feels certain. Run the calculation at multiple exit points (year 3, year 5, year 7) before closing, not after the buyer calls.
Assuming low treasury rates reduce the penalty. When treasury rates drop, the spread to the note rate widens — the penalty grows, not shrinks. The 1% floor means it never disappears entirely, even when treasury rates exceed the note rate.
Ask an Investor
The Takeaway
Yield maintenance is the primary reason CMBS and agency multifamily loans carry lower origination rates than shorter-term bank debt — lenders price aggressively because they know exit is controlled. For borrowers, it works well when the hold period aligns with the loan term. When business plans change, the penalty can be significant. Model it before closing, not at the point of sale.