No, you cannot lock a mortgage rate at closing. Rate locks must happen well before your closing date, typically after your application is approved and before the final stages of processing.
Here is the typical timeline for locking a rate and why waiting until closing is not an option.
When to Lock Your Rate
The ideal time to lock your rate is soon after your loan application is complete and your credit has been reviewed. Most borrowers lock when they have a signed purchase contract and are comfortable with the current rate. Locking early protects you from rate increases during processing.
Rate locks typically last 30, 45, or 60 days. Your lock period must extend past your expected closing date. If you lock at closing, the lock period would be zero, which defeats the purpose of protecting against rate changes.
Why You Cannot Lock at Closing
By the time you reach closing, your loan documents have been prepared based on the locked rate and terms. The Closing Disclosure, which you receive three days before closing, reflects your locked rate. Changing the rate at closing would require preparing all new documents and restarting the process.
Best Practice
Lock your rate as soon as you have a purchase contract and are satisfied with the rate. Choose a lock period that extends a few days past your expected closing to provide a buffer. This protects you from rate increases and gives you peace of mind.
Bottom Line
You must lock your rate well before closing. Lock early after contract acceptance to secure your rate and avoid last-minute surprises.