Commercial Loan Prepayment Penalty: Step-Down, Yield Maintenance and Defeasance Explained

Why prepayment protection exists at all

A lender funding a fixed-rate loan is matching an asset with a known yield against a liability with a known cost — a deposit base, an insurance company’s reserve obligations, or a bond investor’s coupon. Early repayment breaks that match, and it usually happens when rates have fallen, which is exactly when the lender can only redeploy the cash at a worse yield.

How aggressively that risk is documented depends on who holds the loan. A community bank keeping paper on balance sheet can live with a declining premium. A life company matching a 10-year loan to a 10-year liability wants to be made whole. A securitization trust, which cannot renegotiate anything, needs the cash flow left undisturbed entirely.

Step-down: a percentage of the balance, declining by year

The simplest commercial loan prepayment penalty structure. The premium is a stated percentage of the principal being repaid, falling each loan year — a 5-4-3-2-1 schedule means five percent of the balance in year one, four percent in year two, and so on, usually with an open period at the end when payoff is at par. Variants include 3-2-1 and schedules with a floor that never fully burns off.

The cost is knowable today without reference to any market variable, and it is arithmetic on the balance rather than a present-value calculation, so it does not move when Treasury yields move. Step-down is common on bank loans, agency multifamily products, bridge debt and DSCR investor loans. The trap sits in the partial-prepayment language: some notes let you pay down principal in defined annual increments without triggering the premium, others treat any principal reduction as a prepayment.

Yield maintenance: making the lender whole on lost interest

Yield maintenance abandons flat percentages and computes the lender’s actual economic loss. The mechanics are consistent across most notes even when the wording differs:

1. Take the remaining scheduled payments on the loan from the prepayment date forward.
2. Determine a reinvestment rate — typically the yield on a U.S. Treasury security whose maturity most closely matches the loan’s remaining term, sometimes plus a stated spread.
3. Discount those remaining payments back to present value at that reinvestment rate.
4. Subtract the outstanding principal balance; the excess is the premium.
5. Compare the result to the floor — most notes set a minimum, commonly expressed as one percent of the amount prepaid, so the premium never reaches zero.

Two consequences follow from that formula. When market rates sit below your note rate, the discounting produces a large number, because the lender genuinely cannot replace your coupon. When rates have risen above your note rate, the calculation collapses toward the floor and yield maintenance becomes cheap — borrowers who assume the clause is always punitive have this backwards in a rising-rate market.

The second consequence hides in a single phrase. Some notes discount the remaining payments to stated maturity; others discount only to the start of the open prepayment window, typically three to six months earlier, which strips months of interest out of the calculation. Find that phrase before you model anything. Yield maintenance is standard on life insurance loans and appears on many portfolio bank and agency executions.

Defeasance: substituting collateral, not repaying the loan

Defeasance is the one most often misdescribed, because it is not a prepayment at all. The loan is not repaid. It stays outstanding, with the same balance, the same rate and the same payment schedule, until its original maturity.

What changes is the collateral. The borrower buys a portfolio of U.S. government securities — Treasuries, and where permitted certain agency obligations — structured so their scheduled principal and interest match, dollar for dollar and date for date, every remaining payment the loan requires. That portfolio is pledged to the lender in place of the real estate, and a successor borrower, usually a special-purpose entity established by the defeasance consultant, assumes the loan and takes the securities. The lien on your property is released. The substitution is therefore precise: government securities replace real property, and the loan’s cash flow to the investor continues undisturbed.

Why defeasance exists in CMBS

Because the alternative is impossible. A conduit loan is pooled into a trust that elects REMIC status under the Internal Revenue Code, and the certificates are sold to bond investors who bought a defined stream of payments over a defined term. A REMIC is a passive vehicle: it cannot behave like an active lender by accepting a lump-sum payoff and reinvesting the proceeds, and the servicer has no authority to renegotiate for investors. Defeasance solves that. The trust keeps receiving exactly the payments it expected, now sourced from government securities rather than a building, and the bondholders’ cash flow is arguably improved, since Treasury-backed payments carry less credit risk than one mortgaged property. That is why defeasance is close to universal on fixed-rate cmbs loans and rare outside securitized debt.

Two structural points follow. Defeasance is generally unavailable until at least two years have run from the securitization’s start-up date, which is why conduit loans carry an initial lock-out. And the cost is set by the securities market rather than a schedule: when Treasury yields sit well below your note rate, buying that cash flow is expensive, and when yields rise toward or above it, the portfolio gets cheaper. Add consultant, accounting verification, servicer, trustee and legal costs.

The three structures side by side

The lead-time row is what derails transactions. Defeasance is a coordinated closing involving a consultant, an accountant, a securities purchase, a servicer and a successor borrower, so a 30-day close is a scheduling problem you created at signing.

Reading your own note: a checklist

1. Find the prepayment section of the note, then check the loan agreement for a defeasance article — on conduit debt the detail sits there, not in the note.
2. Write down the lock-out end date. Nothing can be paid before it.
3. Write down the open window start date, when payoff is at par. Sometimes waiting a quarter is the whole answer.
4. Identify which mechanism applies and whether the note offers a choice; some loans permit either yield maintenance or defeasance, most conduit loans permit only defeasance.
5. For yield maintenance, extract three things: the reinvestment rate definition, whether discounting runs to maturity or to the open window date, and the minimum floor.
6. For step-down, confirm the annual percentages and whether partial prepayment is allowed without a premium.
7. Check the notice requirement, commonly 30 days in writing and longer for defeasance, and whether that notice is revocable if your sale falls through.
8. Confirm what a sale triggers, since assumption is a separate right with its own fee and approval process.
9. Request a written payoff or defeasance quote from the servicer with a stated good-through date.

What this means for your deal

The prepayment structure belongs inside the decision, not behind it. If you hold conduit debt and Treasury yields have risen since origination, run a defeasance quote before assuming the property is unsellable — the number calculated against today’s securities pricing may be well below what you carry in your head. Two alternatives also deserve attention before you accept any commercial loan prepayment penalty: assumption, which transfers existing debt to a buyer and is often the cheapest exit on a below-market coupon, and a partial-release or paydown provision where your documents contain one.

On new debt, prepayment terms are negotiable in ways pricing often is not — a shorter lock-out, a longer open window, a step-down instead of yield maintenance, or a burn-off tied to your expected hold. Mission Valley Capital places transactions across local banks, national banks, correspondent lenders, alternative lenders and private-money sources, and those channels carry materially different prepayment conventions on otherwise similar loans. Raising the exit at term sheet stage costs less than negotiating with a servicer later.