Rate locks, deposits and breakage exposure

A rate-lock decision should answer two questions: which economic component becomes fixed, and which obligations the borrower accepts in return? An index lock, a complete note-rate lock and a preliminary quote can have different effects. The deposit paid today is also different from the final cost if the transaction does not close.

Begin with the signed agreement and its incorporated quote, not the email subject line. Record the locked amount, index or coupon, spread treatment, expiration, permitted amount changes, required deliverables and responsible parties. Identify whether final underwriting can change pricing or reduce proceeds. A lock should not be described as unconditional loan approval unless the actual documents establish that result.

A primary-source example shows why the label matters

Fannie Mae’s Streamlined Treasury Lock term sheet, reviewed October 21, 2026, describes an index lock before a full rate lock. It identifies subsequent delivery obligations, possible final-pricing changes and a defined breakage framework. This is one specified program, with eligibility and documentation requirements; it does not establish the terms of every agency or commercial lock.

Use that distinction when requesting proposals. Ask what happens if the appraisal reduces proceeds, a material lease changes, ownership changes or closing misses the deadline. Identify whether the response is repricing, an amount-adjustment fee, deposit retention, an extension option or termination. Those outcomes should be documented rather than inferred from the word “locked.”

Worked exhibit: deposit is not automatically the final expense

The following is an invented lock agreement used only for arithmetic. Assume a $10 million locked amount, a $200,000 cash deposit and a failure charge equal to the greater of $50,000 or documented hedge-unwind costs, capped at $200,000. Assume any deposit excess is refundable after reconciliation, with no other charges. These terms must be replaced with the actual agreement before use.

The cap limits the modeled charge only because the hypothetical agreement expressly says so. A different agreement might allow liabilities beyond the deposit or separately charge legal and administrative costs. The table is not a prediction of hedge values, and it does not calculate market breakage from interest-rate movements.

At signing, the borrower still needs the full $200,000 of liquidity. A possible later refund does not finance closing costs today. If the deposit is credited at closing, show that credit against the appropriate use of funds; do not count both the original deposit and its closing credit as two separate expenses.

Compare a lock with a credible closing plan

Assume a separate interest-only financing scenario in which waiting exposes a $10 million balance to a hypothetical 0.25-percentage-point increase for one year. The simple annual interest difference is $25,000. If a thirty-day closing delay also costs $40,000 in incremental carrying and transaction expenses, those are separate modeled effects.

It would be misleading to compare the $25,000 interest sensitivity directly with the entire $200,000 deposit as if both were certain expenses. The deposit is a cash requirement whose eventual treatment depends on the agreement. A meaningful comparison distinguishes expected interest, liquidity tied up, documented failure charges and costs caused by delay. Assigning probabilities would require justified assumptions; the scenario table itself supplies none.

Also test a lower final loan amount. If underwriting supports $9.4 million rather than $10 million, the investor must evaluate the $600,000 proceeds reduction and the lock’s amount-tolerance provisions separately. An agreement might tolerate the change without a fee while the transaction still requires substantial additional equity. Avoid declaring the lock successful solely because no breakage charge applies.

Build an obligation map before authorizing the lock

Create one row for each required deliverable: appraisal, environmental work, entity approvals, verified financials, title matters and any program-specific submissions. Use the actual checklist rather than assuming every item applies. Record who owns the item, its completion evidence and the last date on which a defect can realistically be corrected.

The critical path is often shorter than the nominal lock period. A report due two days before expiration may leave no time for underwriting questions. Ask the lender which items must be accepted before locking and which remain conditions afterward. Keep “ordered,” “received,” “reviewed” and “accepted” as different statuses.

If an extension becomes necessary, obtain its price, duration and conditions before the original period expires. Do not assume the deposit or pricing carries forward. Save the executed extension beside the original agreement and update the funding ledger.

The final decision should identify a person authorized to accept the obligation and a funded plan for the deposit, closing equity and a failed-close scenario. Counsel can confirm the scope of liability and the parties bound. The financial model then shows what the investor can afford under those terms, without representing a lock as either a free option or a guaranteed closing.