Checking whether a quoted mortgage rate is actually locked
Protect your financing by verifying whether your interest rate is locked or floating, ensuring your mortgage offer remains stable until closing.
The short answer
A rate lock protects you against interest rate fluctuations between your application and closing. However, not all quotes are locked. You must verify if your rate is locked on your Loan Estimate, as an unlocked rate can change, affecting your monthly payment and overall affordability.
Verifying Your Rate Status
A rate lock is a formal agreement with your lender. On your Loan Estimate, check the section regarding rate locks. If it says "NO," your rate is floating, meaning it could change before you finalize your loan.
Action: Look specifically at the first page of your Loan Estimate for the rate lock confirmation. If it is not locked, ask your loan officer for the written terms of their rate lock policy.
Understanding Rate Fluctuations
If your rate is not locked, external market factors can cause your quoted interest rate to change. This directly impacts your monthly payment. Being aware of this risk allows you to better prepare your budget for potential changes.
Hypothetical Planning: Budget for a scenario where your interest rate increases by 0.5%. If your monthly payment remains affordable under this stress test, you may feel comfortable waiting to lock the rate.
Requesting a Lock
If you decide that rate stability is a priority, ask your lender to lock your rate. Ensure you receive written confirmation of the lock, including the expiration date. A lock is typically valid for a specific period, covering the time until your scheduled closing.
Action: Ask your lender: What is the expiration date of my rate lock, and are there any fees associated with extending the lock if closing is delayed?
Closing and Rate Stability
The time preceding closing is critical. Ensure your rate lock is sufficient to cover the period leading up to your final signing. Miscommunication regarding the lock status can lead to unexpected changes in your Closing Disclosure.
Action: Confirm the lock status periodically with your loan officer throughout the mortgage process.
Checklist
- Review the Loan Estimate for the 'Rate Lock' box.
- Obtain written confirmation of any rate lock agreement.
- Check the expiration date of your rate lock.
- Ask the lender about potential extension fees for the lock.
- Monitor your loan status to ensure the lock remains active until closing.
Common questions
Does the Loan Estimate guarantee my interest rate?
No. Unless you have a signed rate lock agreement, the rate on your Loan Estimate is subject to change based on market conditions.
What happens if my rate lock expires before closing?
If your lock expires, you may need to pay an extension fee or your interest rate could revert to the current market rate, which may be higher or lower.
Sources
- CFPB — Buying a houseChecked October 12, 2026
- CFPB — Loan Estimate explainerChecked October 12, 2026
This guide is general educational content from SQFT IO, prepared with AI assistance. It is not legal, tax or loan advice. Talk with a licensed attorney, tax professional or lender about your situation. SQFT IO Illinois license 478.027617.