You can lock in a mortgage rate for as little as 15 days or as long as roughly 360 days, but most lenders build their pricing around 30-, 45-, and 60-day windows. How long can you lock in a mortgage rate depends on where your loan is in the pipeline, how long your closing will realistically take, and how much you’re willing to pay for the extra time. Longer locks cost more, and certain changes on your end can void the rate no matter how many days are left on the clock.
Standard Lock Periods: 30, 45, and 60 Days
The most common rate lock windows are 30, 45, and 60 days, which line up with the typical timeline for completing an appraisal, title search, and underwriting on a residential mortgage.1Consumer Financial Protection Bureau. What’s a Lock-In or a Rate Lock on a Mortgage? A 45-day lock is a popular middle ground because it builds in a small cushion for routine delays without paying for time you probably won’t need.
If your loan has already cleared the major underwriting steps and is close to funding, some lenders offer a 15-day lock at a slightly better price. That option really only makes sense once you have a clear-to-close in sight.
When You Need More Time: 90 to 360 Days
Locks of 90 or 120 days are available for situations where closing will take longer than usual, such as complex title work or coordinating multiple parties. A handful of lenders also run “lock and shop” programs that let you secure a rate for around 90 days while you search for a property, with optional extensions if you need more time.
For new construction, where a home may not be ready for months, some lenders offer extended locks of 180 to 360 days. These programs let you secure a rate when you sign the construction contract rather than waiting until the home is complete. Because new construction carries more uncertainty from permits, weather, and material delays, extensions on these locks also tend to be available in larger increments of 30 to 90 days.
How Longer Locks Affect Your Cost
Rate locks are not free. A 30-day lock usually carries the lowest rate or fewest upfront points, while a 60-day or 90-day lock on the same loan may come with a slightly higher rate or additional points. The lender takes on more risk when committing to hold a rate for a longer window, and that risk gets passed to you.
For extended locks of 120 days or longer, some lenders charge an upfront fee, often around 1 point (1 percent of the loan amount), that may be refundable at closing. A borrower locking a $350,000 loan for 360 days during new construction, for example, might pay $3,500 upfront to secure the rate. Others build the cost into a slightly higher rate instead. When comparing lenders, ask specifically how much each lock period costs, and whether any upfront fee is refundable, so you can weigh the premium against the protection.
Note that your Loan Estimate will not tell you how much the lock itself costs, what it would cost to extend it, or whether a shorter or longer lock period would change your pricing.1Consumer Financial Protection Bureau. What’s a Lock-In or a Rate Lock on a Mortgage? You need to ask your lender about those details separately.
Extending a Lock Before It Expires
If your closing date slips past the end of your lock period, most lenders allow you to extend the lock in increments, commonly 7 or 15 days at a time. Extensions are not free. Fees generally range from 0.125 percent to 0.25 percent or more of your loan amount per extension, depending on the lender and the length of the add-on. On a $300,000 loan, a 15-day extension at 0.125 percent would cost $375. Some lenders charge a flat fee instead.
You must request the extension before the original lock expires. Miss that deadline and the lock lapses.
Who caused the delay matters. If the lender is responsible, many lenders will waive the extension fee or cover it themselves. If a third party such as the appraiser or title company is responsible, the lender may split the cost with you. Ask about that policy before you lock.
What Happens If Your Lock Expires
When a rate lock expires without an extension, your rate is no longer guaranteed. You generally have three options: pay for an extension to preserve the original rate, accept whatever rate the lender offers based on current market conditions, or let the rate float and lock again closer to closing.
An expired lock does not mean you lose the loan, just the rate. If market rates have risen since you originally locked, you will face a higher rate unless you pay to extend. If rates have fallen, letting the lock expire and relocking at the current market rate could actually save you money. Before deciding, compare the extension fee against the monthly payment difference under the new rate over the life of the loan.
What Can Change Your Locked Rate Before Closing
A rate lock does not guarantee your rate under all circumstances. Even with a lock in place, your rate can change if key details of your application shift. Common reasons a locked rate may be adjusted include:
- Switching loan programs or changing your down payment, which can alter the pricing tier your loan falls into.
- An appraisal that comes in higher or lower than expected, changing the loan-to-value ratio.
- A drop in your credit score from taking on new debt, applying for other credit, or missing a payment during the lock period.
- Income your lender cannot verify, such as overtime or bonuses you originally reported.
Each of these scenarios changes the risk profile of your loan, and the lender is permitted to re-price accordingly.1Consumer Financial Protection Bureau. What’s a Lock-In or a Rate Lock on a Mortgage? The safest approach during a lock is to avoid opening new accounts, making large purchases on credit, or changing jobs.
Locks Don’t Transfer to Another Lender
A rate lock is an agreement between you and one specific lender. You cannot take it to a different lender. If you decide to switch after locking, you forfeit that rate, start the application process over, and get whatever rate the new lender offers based on current market conditions.
Appraisals generally do not transfer between lenders either, meaning you may need to pay for a second one. FHA loans are an exception: HUD requires the original lender to transfer the appraisal to the new lender within five business days if the borrower requests it. The rate lock itself, however, remains non-transferable.
Choosing the Right Length for Your Loan
Match the lock to a realistic closing timeline, not an optimistic one. If your purchase contract sets a 45-day close, a 30-day lock leaves no margin for a slow appraisal or missing document, and the extension fee on a $300,000 loan can easily wipe out the small savings from choosing the shorter window. If you are refinancing and everything is already documented, a 30-day lock may be enough. For new construction, look at extended-lock programs from more than one lender, since both the fee structures and the refund policies vary significantly. And whatever length you choose, ask your loan officer what a float-down option would cost, since it can only be added at the time of the lock.