A lender commitment to hold stated refinance pricing for a defined period while the replacement loan moves toward closing.
A refinance rate lock is a lender commitment to hold stated refinance pricing for a defined period while the replacement loan moves toward closing.
The commitment applies under the lender’s lock terms and the application facts on which the pricing was based.
Refinance value can be sensitive to small pricing changes. A higher rate may reduce monthly savings or extend the Recoupment Period. More discount points can increase upfront cost. A lock gives the borrower a defined pricing reference while appraisal, title, payoff, and underwriting work continues.
A lock is not loan approval. It also does not freeze every closing cost. The borrower and property still must qualify, and third-party or government charges may change under applicable rules.
Locked pricing can also be affected when important application facts change. A different loan amount, appraised value, credit profile, documented income, occupancy, loan product, or cash-out amount can require repricing even before the lock expires. The lender’s written policy controls.
The borrower may lock after application, after selecting an offer, or later in the process depending on lender practice. Page 1 of the Refinance Loan Estimate shows whether the interest rate is locked and, when locked, the expiration date and time.
The lock period should cover the expected closing timeline, including underwriting, valuation, title work, document preparation, and any applicable rescission period before disbursement. Closing near expiration leaves less room for a delayed appraisal, title condition, or document correction.
If the transaction will not close on time, the lender may offer an extension, relock, or other treatment. Cost and responsibility for an extension depend on the lock agreement and reason for delay.
| Lock item | Borrower-facing question |
|---|---|
| Interest rate | What note rate is protected? |
| Points or lender credits | What pricing is tied to that rate? |
| Expiration | By what date and time must the transaction reach the required stage? |
| Loan assumptions | What loan amount, value, occupancy, product, and credit facts support the lock? |
| Extension terms | What happens if closing is delayed, and who pays? |
| Float-down terms | Can pricing improve if market rates fall, and under what rules? |
The Loan Estimate identifies lock status, but a separate lock confirmation may contain additional conditions. Borrowers should compare both.
A borrower expects to save $180 per month and locks for 45 days. A title issue delays closing beyond the original date. The lender offers a seven-day extension for a fee.
The borrower compares the extension cost with the value of preserving the locked rate and with available current pricing. The initial lock did not guarantee a no-cost extension, and the title delay did not automatically extend the expiration.
A refinance rate lock differs from a Rate Lock only by transaction context. The general concept applies to purchase and refinance loans; this page focuses on timing and economics when replacing a mortgage.
It differs from a Lock Period. The rate lock is the pricing commitment; the lock period is its duration.
It also differs from Float Down. A standard lock protects against worsening market pricing but may not automatically give the borrower a lower rate if markets improve. A float-down is a separate feature governed by its own terms.