Mortgage Rate Lock Guide: When Should You Lock Your Rate?
A mortgage rate lock can protect your interest rate while your loan moves toward closing. Learn when locking may make sense, how long a lock should last and what can still change after your rate is locked.
Serving Kansas and Missouri homebuyers since 1997
What is a mortgage rate lock?
A mortgage rate lock is an agreement that holds an offered interest rate for a stated period, subject to the terms and contingencies of the lock agreement. It helps protect you from market-driven rate increases while the loan is processed.
Interest rate
The lock generally protects the agreed interest rate through the expiration date, assuming the transaction closes on time and material application details do not change.
Points and lender credits
Rate-dependent points, credits and charges are typically tied to the locked pricing. Review the revised Loan Estimate after locking.
Expiration date
Your closing should occur before the lock expires. If it does not, an extension, relock or current-market pricing may apply.
Check page 1 of your Loan Estimate
The Loan Estimate shows whether your rate is locked and, when applicable, the lock expiration date and time. Receiving a Loan Estimate does not automatically mean the rate is locked.
When is the best time to lock a mortgage rate?
Most purchase borrowers consider locking after they have an accepted contract and a realistic closing date. The goal is not to predict the exact bottom of the market—it is to protect a payment and pricing structure that works for the transaction.
Locking may make sense when:
- You are under contract and closing within the available lock period.
- The current payment is affordable and meets your goals.
- You have limited tolerance for a payment increase.
- A rate increase could affect debt-to-income qualification.
- Important economic reports or market events are approaching.
Floating may be considered when:
- You are not yet under contract or do not have a reliable closing date.
- You can tolerate market movement in either direction.
- Your lender confirms there is sufficient time to monitor pricing.
- You understand that an unlocked rate can rise before closing.
- The potential benefit outweighs the risk to your budget.
A rate forecast is not a guarantee
Mortgage pricing can move quickly in response to inflation data, employment reports, Treasury yields and mortgage-backed securities. A lock decision should be based on your transaction—not a single prediction.
Where the rate lock fits in the mortgage process
Your exact sequence can vary, but most purchase transactions follow a similar path.
- 1Pre-approvalConfirm budget and loan options
- 2Offer acceptedEstablish contract and closing date
- Rate lockSelect pricing and expiration period
- 4Appraisal and underwritingVerify property and loan eligibility
- 5ClosingComplete before the lock expires
Common mortgage rate lock periods
Rate locks are commonly available for 30, 45 or 60 days, with longer periods sometimes available. Availability and pricing vary by lender, loan program and transaction.
Short closing window
Often appropriate when processing is well underway and the closing date is firm.
Lower time cushionStandard purchase timing
Provides more room for appraisal, underwriting and ordinary scheduling issues.
Balanced coverageLonger contract period
Useful when the closing date is farther away or additional processing time is expected.
More time protectionExtended or construction lock
May be available for new construction or long lead times, often with added cost or different terms.
Program-specificChoose a lock that extends beyond the scheduled closing
A small timing cushion can help protect against ordinary delays involving appraisal, title, insurance, documentation or seller scheduling. Ask who pays if an extension becomes necessary.
What happens after you lock?
A lock protects against one risk—market rates rising—but the tradeoff is that you may not automatically receive a lower rate if the market improves.
Your locked rate generally remains protected
Assuming you close before expiration and the loan details remain consistent with the lock agreement, market increases generally do not change the locked rate.
Your rate may stay at the locked level
A lower market rate is not automatically applied. Ask whether a float-down, relock or other repricing option is offered and what conditions or costs apply.
What is a float-down option?
A float-down is a lender-specific feature that may allow a borrower to obtain improved pricing after locking if market rates decline enough. Eligibility thresholds, timing, fees and the amount of improvement vary. It is not included with every loan or lock.
Can your mortgage rate change after it is locked?
It can under certain circumstances. A lock generally protects against market movement, not changes to the borrower, property, loan structure or transaction.
Appraisal or property changes
A lower appraised value, different property type or revised occupancy may change loan-to-value or pricing.
Borrower profile changes
Changes to credit, verified income, employment, debt or assets can affect eligibility and terms.
Loan amount or program changes
Changing the loan amount, down payment, term, product or points can require updated pricing.
The lock expires
If closing occurs after expiration, an extension fee, relock policy or current-market pricing may apply.
Questions to ask before locking your mortgage rate
Get the lock terms in writing and make sure the expiration period matches the transaction.
Is the interest rate currently locked, and what exact date and time does it expire?
Which interest rate, APR, discount points and lender credits are included?
Does the lock period leave enough time beyond the scheduled closing date?
What happens if the lock expires, and how are extension costs determined?
Is a float-down or repricing option available if rates improve?
Which changes to my application or property could alter the locked terms?
Common mortgage rate lock mistakes
Locking too early
A lock that starts before the closing timeline is reliable may expire and create extension costs.
Waiting for the perfect rate
Trying to time the exact market bottom can expose an affordable transaction to unnecessary risk.
Not reviewing the terms
Confirm the rate, points, credits, expiration date and extension policy instead of relying on a verbal quote.
Mortgage rate lock FAQs
Does a Loan Estimate mean my mortgage rate is locked?
No. Some lenders lock the rate when issuing the Loan Estimate, while others do not. Page 1 of the Loan Estimate identifies whether the rate is locked and, if so, the expiration date and time.
How long can I lock a mortgage rate?
Common periods include 30, 45 and 60 days. Longer locks may be available for extended closings or new construction, depending on lender and program guidelines.
Is a mortgage rate lock free?
Some standard locks may not require a separate upfront fee, but lock length can affect pricing. Extended locks, float-down features and extensions may involve fees, deposits or pricing adjustments.
Can I lock a rate before I find a house?
Some lenders offer lock-and-shop or extended-lock programs, but standard purchase locks generally work best after a property and closing timeline are known. Availability varies.
What happens if my rate lock expires before closing?
You may need an extension, relock or updated pricing. The cost and terms depend on the lender's policy, the reason for the delay and current market conditions.
Can I switch lenders after locking a rate?
You may change lenders, but a rate lock generally does not transfer. Starting with another lender can affect appraisal, underwriting and closing timelines, so compare the full consequences before changing.
Should I lock during a Federal Reserve meeting week?
A Fed meeting can contribute to market volatility, but mortgage rates are influenced by many factors and can move before or after the announcement. Base the decision on your closing deadline, approved payment and tolerance for risk.
Can my lender cancel my rate lock?
A lock remains subject to its written terms and contingencies. Material changes to the application, property or loan—or failure to close before expiration—can affect the locked pricing. Ask for a written explanation of any change.
Related mortgage rate resources
Protect a mortgage payment that works for you
Compare available pricing, lock periods, points and lender-credit options with a local mortgage advisor.
Rick Woodruff, NMLS #248984
Senior Mortgage Advisor at Metropolitan Mortgage Corporation. This educational guide explains general rate-lock concepts; actual lock terms, fees and eligibility depend on the lender, loan program and transaction.
Metropolitan Mortgage Corporation | Company NMLS #227722 | Equal Housing Lender. This page is for educational purposes and is not a commitment to lend, lock an interest rate or extend credit. Rates, terms, lock periods and program availability are subject to change without notice.