No. Getting preapproved for a mortgage does not, by itself, lock your interest rate. Preapproval is an estimate based on an initial review of your finances. A rate lock is a separate, time-limited commitment from a lender. Check the top of page one of your Loan Estimate to see whether your rate is locked and, if so, the date and time the lock expires.
What preapproval tells you—and what it does not
A mortgage preapproval is a shopping tool, not a promise that your rate or loan is final. The lender reviews information about your finances and estimates how much you may be able to borrow and what interest rate you might pay. The estimate can help you understand your budget and compare lenders, but it is not the same thing as a rate lock or final loan approval.
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A lender may issue a preapproval without locking a rate. Some lenders may lock a rate later, including when they issue a Loan Estimate; practices vary. That means you should not infer your rate status from the word “preapproved,” a rate mentioned in a conversation, or a preliminary quote. Confirm the status in writing.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteThe Consumer Financial Protection Bureau (CFPB) explains preapproval as an estimate of what a lender may be willing to lend, while its rate-lock guidance describes a distinct commitment subject to a deadline and conditions. A Loan Estimate is also not final approval, and receiving one does not obligate you to use that lender.
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How to tell whether your rate is locked
- Open page one of your Loan Estimate. Look near the top for the interest-rate lock status. The form indicates whether the rate is locked and, when applicable, the expiration date and time.
- Read the lock agreement. The Loan Estimate shows key status and timing information, but the lender’s written lock terms explain the conditions, any fees, and what happens if the transaction changes or closing is delayed.
- Ask the lender to confirm the exact deadline. Ask, “Is my rate locked right now, and until what date and time, including the time zone?” Do not rely on an assumed number of days or a verbal estimate.
- Check that the estimate matches your loan. Confirm that the loan type, amount, down payment, and other application details are the ones you expect. A rate shown for different terms may not apply to your actual loan.
Under the CFPB’s Regulation Z, 12 CFR § 1026.37(a)(13), when a rate is locked for a specified period, the Loan Estimate must show the end date and time, including the applicable time zone. If the rate is not locked, it can change; the estimate is not a guarantee that the quoted rate will remain available.
What a rate lock protects—and its limits
A rate lock generally protects the agreed interest rate through closing for the specified period, provided the transaction meets the lock’s conditions. The CFPB’s rate-lock explanation, last reviewed May 2, 2023, puts it this way: “A lock-in or rate lock on a mortgage loan means that your interest rate won’t change between the offer and closing, as long as you close within the specified time frame and there are no changes to your application.”
That is a conditional protection, not an unconditional guarantee. The lock period matters, and the application must remain consistent with the assumptions behind the offer. A change in the loan amount, credit score, verified income, loan type, down payment, or appraisal circumstances may affect the terms or rate. Ask your lender which changes matter under your specific agreement and how they would be handled.
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A rate lock also does not mean the lender has approved the loan. The lender still needs to complete its review and verify the information supporting the application. Keep responding to requests for documents and tell the lender promptly if a relevant detail changes; do not assume the lock makes those steps unnecessary.
How long a mortgage rate lock lasts
A lock lasts for the period stated in the lender’s written terms. The CFPB’s guidance, last reviewed May 2, 2023, says rate locks are typically available for 30, 45, or 60 days, and sometimes longer. Those are examples in CFPB guidance, not a rule requiring every lender to offer the same terms or a guarantee that a particular term is available to you.
Compare the lock’s expiration date and time with the lender’s expected closing schedule. A longer lock may be useful when closing is likely to take more time, but the price and availability depend on the lender and offer. Ask whether you can choose a shorter or longer term and how the rate, points, or other costs would change. Do not choose solely by looking at the quoted interest rate without considering the time the offer must remain available.
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What happens if the lock expires before closing
If closing will not happen by the lock deadline, contact the lender before the lock expires. Ask whether an extension is available, what it costs, and whether approval is discretionary. A lock extension may involve a fee; the amount and rules are lender-specific, so do not assume an extension is automatic or free.
If the lock expires without an extension, the rate may no longer be protected. The lender’s terms determine how a new rate is set and what choices are available. Ask the lender to explain those consequences in writing and whether the revised terms affect the estimated monthly payment or other loan costs. When comparing offers, account for the likelihood of closing on time as well as the stated expiration date and extension policy.
Can your rate change after it is locked?
It can, in limited circumstances set out in the agreement. A lock is generally intended to hold the stated rate through closing if you close within the lock period and the application has not changed in a way that affects the offer. If key details change, or the loan no longer matches the assumptions used for the lock, the lender may need to revise the terms. The exact triggers and consequences depend on the written lock agreement.
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Market rates can also move while you are locked. Depending on the lender’s terms, a locked borrower may not automatically receive a lower rate if market rates fall. Ask whether the lender offers a “float-down” option or another adjustment, when it can be used, and whether it has a cost or other conditions. Do not assume that a rate lock includes this feature.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Questions to ask before accepting a lock
- Is my rate locked now, and what is the exact expiration date and time?
- What lock period does this offer include? Can I choose a shorter or longer period, and how would the price change?
- What happens if closing is delayed? Is an extension available, what would it cost, and can the lender refuse it?
- Which changes to my application could affect the locked rate or other terms?
- If market rates fall, is a float-down or other adjustment available? What are its conditions and cost?
- Does the quoted rate depend on points, lender credits, or other assumptions I should include when comparing offers?
Ask for answers in writing and keep the Loan Estimate and lock agreement together. Policies differ by lender; the written terms for your offer are more useful than assuming that a rule from another lender applies to yours.
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How to compare rate-lock offers fairly
Request and review Loan Estimates from multiple lenders, as the CFPB recommends. Compare offers using the same loan assumptions rather than ranking them by interest rate alone. A lower quoted rate may come with more points, a shorter lock, or less favorable extension terms.
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| Compare | What to line up | Why it matters |
|---|---|---|
| Loan terms | Loan type, amount, and down payment | A quote based on different loan details may not be a like-for-like offer. |
| Rate and upfront pricing | Interest rate, points, and lender credits | A lower rate may require higher upfront costs; compare the pricing alongside the rate. |
| Lock timing | Lock duration and exact expiration date and time | A shorter lock may expire before closing, leaving the rate unprotected unless the lender extends it. |
| Delay terms | Whether an extension is available, its cost, and any conditions | Closing schedules can change, and extension policies are not uniform. |
| Lock contingencies | Changes that could affect the rate or terms | A lock is conditional; the lender’s written agreement defines the relevant circumstances. |
Check each Loan Estimate’s lock status rather than assuming all lenders treat the quote the same way. If one estimate is locked and another is not, the quoted rates have different levels of certainty and should not be compared as though both were protected through the same date.
Preapproval, Loan Estimate, rate lock, and approval are different
- Preapproval: An early estimate based on a lender’s initial review of your finances. It helps with shopping but does not itself lock a rate.
- Loan Estimate: A standardized document describing proposed loan terms and costs. Its first page shows whether the rate is locked and, if so, the lock deadline. The estimate is not final approval and does not require you to choose that lender.
- Rate lock: A separate lender commitment to hold a specified rate for a stated period, subject to the written conditions and an on-time closing.
- Final loan approval: A later decision after the lender has completed the required review. A rate lock does not substitute for that review or guarantee approval.
Keeping these stages separate prevents a common misunderstanding: a lender can preapprove you, quote a rate, or provide a Loan Estimate without having locked the rate or completed its approval process.
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