08/28/2026
Rate lock is one of those mortgage concepts that is explained quickly during the loan process and then largely forgotten until it becomes a problem. Here is what you actually need to know.
What a rate lock is.
When you lock your rate, your lender commits to a specific interest rate for a defined period — typically 30, 45, or 60 days. During that window, your rate does not change regardless of what happens in the broader market. If rates go up after you lock, you are protected. If rates go down, you typically do not automatically benefit, though some lenders offer float-down options at a cost.
When to lock.
The conventional wisdom is to lock your rate once you are under contract and have a clear closing timeline. Locking too early — before you have an accepted offer — may mean your lock expires before you close, requiring an extension or a new lock at current market rates. Locking too late — or not at all — exposes you to rate movement during the loan process.
What happens if your lock expires.
In Georgia, real estate closings typically happen 30 to 45 days after an accepted offer. If your lock period is 30 days and the closing gets delayed — for any reason — you may need to extend your lock, which usually comes at a cost. Knowing your lock expiration date and planning around it matters more than most buyers realize.
Rate lock extensions.
Most lenders can extend a lock, but it is not free. The cost varies and is typically added to your closing costs or reflected in a slightly adjusted rate. If you are in a transaction with moving parts, building a rate lock period that accounts for potential delays is worth discussing with your lender upfront.
Float-down provisions.
Some loan products allow you to lock your rate but capture a lower rate if the market improves before closing. These provisions have their own terms and costs. They are worth asking about, but not worth assuming they exist in your loan without confirming.
The right lender will walk you through all of this before you are under contract, not after. I can connect you with local lenders in Metro Atlanta who handle this conversation the right way from the start.
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