The date mortgage pricing protection ends if the loan has not closed or funded.
Rate lock expiration is the point when a mortgage rate lock no longer protects the borrower because the locked pricing period has ended before the loan closes or funds.
Rate lock expiration matters because mortgage pricing can change after the original protection runs out. A borrower may have planned around one rate, one point structure, and one cash-to-close estimate, but those terms may need to be extended, relocked, or repriced if the closing does not happen in time.
It also matters because lock expiration is often a timing problem rather than a shopping problem. Appraisal delays, title issues, underwriting conditions, seller timing, or document scheduling can push a file past the original lock window even when the borrower acted in good faith.
Borrowers encounter lock-expiration risk after a Rate Lock is issued and before the mortgage closes. The key question is whether the transaction can reach closing or funding before the stated expiration date.
The term becomes practical when a lender, loan officer, or closing team warns that the file may need a Rate Lock Extension or a new pricing decision.
| Term | Main question it answers |
|---|---|
| Rate Lock | Is a specific rate and pricing structure protected? |
| Lock Period | How long does that protection last? |
| Lock expiration | When does that protection end if the loan is not closed or funded? |
| Rate Lock Extension | Can the existing lock be kept alive for more time? |
| Relock | Is a new lock needed after the prior one is no longer valid? |
A borrower locks a rate for 30 days, but the closing is delayed because a title issue needs extra review. If the lock expires before closing, the borrower may need an extension, a relock, or current-market pricing instead of assuming the original quote still applies.
Rate lock expiration differs from Lock Period. The lock period is the length of the original protection window. Expiration is the end of that window.
It also differs from Rate Lock Extension. Expiration describes the deadline problem. The extension is one possible way to keep the original lock alive for additional time.
It also differs from Rate Float. A borrower is floating when pricing has not been locked. Lock expiration happens after a lock existed but no longer protects the file.