Mortgage Rate Lock

Also called: Rate Lock

Common prompts: "what is a mortgage rate lock," "how long can you lock a mortgage rate," "should I lock my mortgage rate"

Definition

A mortgage rate lock is a lender's commitment to hold a specified interest rate for a defined window — commonly 30 to 60 days — while the borrower completes the loan process, protecting them from rate increases before closing. Some locks include a float-down option allowing the borrower to capture a lower rate if rates fall.

Why it matters

In a volatile-rate environment, the timing and terms of a rate lock can materially change a buyer's monthly payment, making it a high-anxiety decision. Borrowers search constantly for guidance on when and whether to lock. Lenders and brokers who publish clear, authoritative explanations capture this high-intent demand and build credibility precisely when the borrower is choosing whom to trust.

Example

A mortgage lender publishes a structured guide on rate locks, float-downs, and timing strategy — surfacing in AI answers when anxious buyers research whether to lock.