A mortgage rate lock is an agreement to hold specified pricing for a defined period, subject to the loan details and conditions used when the lock was issued. It is not a blanket guarantee against every file change.
A lock is tied to a scenario
Loan amount, property, occupancy, credit profile, program, points, closing timeline, and other factors support the locked price. If a material detail changes, the lock may need to be adjusted or the loan re-priced.
Expiration is a project-management issue
The lock should cover underwriting, appraisal or valuation, conditions, signing, and funding. Delays caused by the borrower, property, lender, or third parties can make an extension necessary. Ask who pays for it.
Floating has risk and opportunity
Waiting to lock can benefit from better pricing or suffer from worse pricing. Market predictions are uncertain. Choose based on affordability and closing needs rather than trying to call the exact bottom.
Get the lock terms in writing
- Rate and APR
- Points or lender credits
- Lock date and expiration
- Loan amount and program
- Extension policy
- Float-down terms if offered
Do not assume a float-down
Some lock programs offer a limited opportunity to improve pricing if the market moves, while others do not. Ask about timing, market-movement thresholds, fees, and whether a float-down is automatic or must be requested.
A locked rate still needs a closable file
Submit documents quickly and resolve property or title issues early so the timeline supports the lock period.
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This article is educational and does not provide financial, legal, or tax advice. Program availability, pricing, guidelines, and documentation vary. All loans are subject to eligibility and underwriting.