Lock period
Definition
A lock period is the stated time frame of a rate lock. If the loan does not close within that window, the lock can expire unless it is extended under the lender’s policy.
In plain English
A rate lock is the promise. The lock period is how long that promise is written to last. Lenders offer different lengths, sometimes at different cost. This page does not name typical lengths. Those figures vary and are not the definition.
Technical definition
CFPB’s rate-lock explanation treats the specified time frame as part of the lock and tells consumers the Loan Estimate shows how long a lock lasts. That time frame is this concept.
Why it matters
A lock that is shorter than the remaining path to closing is a process risk, not a different product.
Related terms
Sources reviewed
What's a lock-in or a rate lock on a mortgage?
ObservedSeptember 6, 2026
Important note
This page does not state typical lock lengths or extension fees.