When should you lock a mortgage rate?

Westend61/Getty Images
Bankrate Logo

Why you can trust Bankrate

While we adhere to strict , this post may contain references to products from our partners. Here's an explanation for .

When it comes to interest rates, mortgage applicants should pay close attention because every little bit of interest counts. A quarter of a percentage point doesn’t sound like much, but it can mean thousands of extra dollars in interest paid, or not paid, over the life of a typical 30-year loan.

For buyers worried that rates will rise between the time they apply and their closing date, a feature called rate lock could be the solution.

What is a mortgage rate lock?

A rate lock freezes the interest rate, usually for a fee paid when you agree to the terms of the loan. The lender guarantees (with a few exceptions) that the mortgage rate offered to a borrower will remain available to that borrower for a stated period. With a lock, the borrower doesn’t have to worry if rates go up between the time they submit an offer and close on the home.

Rate locks typically last from 30 to 60 days, though they sometimes last 120 days or more. Some lenders do offer a free rate lock for a specified period. After that, however, even those generous lenders may charge fees for extending the lock.

When should you lock in a mortgage rate?

Borrowers typically can’t lock in a rate until after the initial loan approval — and they worry that by locking in too early, they may miss the opportunity for a better rate before they complete a purchase, or that they may get stuck paying extra to extend the lock once it expires.

A longer rate lock is more expensive. For example, a borrower who chooses a 30-day lock on a fixed-rate 30-year loan may pay a 4 percent rate and zero points, while a 60-day lock might cost 1 point (equal to 1 percent of the loan) or a slightly higher rate with a half-point.

However, if mortgage rates are expected to rise, you might consider jumping on the lower rate as soon as possible. It’s a gamble, because no one really knows what interest rates are going to do because they’re set based on a variety of factors that can change from day to day. It might be helpful to look at rates from the past 60 days to get a sense of how they fluctuate.

Float-down mortgage rate locks

Some lenders will offer a rate lock with a float-down provision. This means that if rates fall within a specific period after your loan is approved, you get the lower rate. If rates go up, you get the rate you were quoted.

But there’s a cost to this feature, so consider your options carefully. Rates may not move at all or in your favor and the float-down means you will have to pay a higher interest rate for the life of the loan or shell out money for points that you’ll never see again.

Questions to ask your lender before you lock

Be sure to get a clear explanation of your lender’s rate lock rules. Find out if your locked rate can change in certain circumstances — for example, if mortgage rates drop, or if you change from a 30-year fixed-rate mortgage to an FHA loan. If you’re offered a rate lock for a fee, balance that cost against the upside risk.

Finally, be sure that your rate lock will be in effect long enough to cover the entire homebuying process. For example, if you anticipate that your closing will take longer than a month, talk to your lender about locking in a rate for that extended period —  preferably without paying additional fees. In general, it’s best to get a 60-day lock, at minimum.

How to make sure you’re financially prepared for a mortgage

Before you lock in a rate, make sure your budget is in order and you are financially prepared to apply for a mortgage, including having the cash to cover the rate-lock fee, if there is one.

Hopper says to ask yourself these questions:

If you lock in a rate too soon and end up going with a different type of loan, your rate lock might be void. Borrowers also can lose a rate lock if their circumstances change — such as a shift in their credit score or in their debt-to-income ratio — before settlement. The underwriting process could uncover factors you weren’t aware of or knew were important, so if possible, ask your lender what conditions would void the lock before you commit to it.

Learn more:

Written by
Zach Wichter
Mortgage reporter
Zach Wichter is a mortgage reporter at Bankrate. He previously worked on the Business desk at The New York Times where he won a Loeb Award for breaking news, and covered aviation for The Points Guy.
Edited by
Senior mortgage editor
Reviewed by
President, Real Estate Solutions
Urgent! Rates expected to jump on Fed Day
-- Days  :  
-- Hours  :
  -- Minutes  :
  -- Seconds
Close icon
Compare refinance rates