Why locking your mortgage rate won’t box you in

Published August 14, 2020

Updated May 6, 2025

Lucy Randall (NMLS ID: 1571868)
by Lucy Randall (NMLS ID: 1571868)

 Row of Multi-Colored Attached Homes with Text That Reads: Lock it Down But Stay Flexible


If you’re applying for a mortgage or refinancing a current loan, one of the steps you’ll take is “locking” your interest rate. While interest rates can go up or down during the course of the underwriting process, locking your rate guarantees a specific interest rate for your loan. Though that terminology may seem final, the truth is you may still have some flexibility even after you’ve locked in your rate. Keep reading to learn more about how rate locks work.

What locking your mortgage rate means

You can lock in an interest rate when you and your lender feel market conditions are favorable enough to provide the best available rate for your mortgage.

Note that the final interest rate you end up locking may be different from the rate that was used when you received your preapproval letter. However, after you lock, your lender will honor that rate, even if market fluctuations cause rates to increase.

Keep in mind that rate locks don’t go on indefinitely. They typically last between 30-60 days, which is long enough to get most loans through underwriting and to the closing table. When you do decide to lock in your rate, confirm that the lock period extends beyond your closing date. If your rate lock expires before this time, it can be extended—just check with your lender to find out if doing so will result in any additional fees.

Why you should lock your mortgage rate

When you lock in your interest rate, you’re taking a crucial step toward figuring out for sure how much your mortgage payment will be each month. Until then, your interest rate, and therefore payments, are subject to daily market fluctuations based on how the mortgage market is doing. Learn more about how rates work here.

If market volatility results in interest rates going up then the total cost of your loan and your monthly payments may end up higher than the original quote by your lender.

On the flip side, if market conditions improve significantly and rates go down, your locked rate won’t go down. But there may be a silver lining: In some cases and in times of extreme market volatility, you may be able to arrange a one-time “float down” to secure a lower rate if it becomes available. This feature may come with additional costs, so find out how rate lock and float down options work with your lender.



When can you lock your mortgage rate?

You can lock your interest rate any time (after pre-approval) throughout the loan process once you’ve been pre-approved, but ideally, this will happen before you receive full loan approval and are cleared for closing. Your lender will likely nudge you to do so, but don’t be afraid to check in and request a rate lock, either.

Remember, locking in a rate simply protects against any future market volatility, and rates could go up or down from the moment you lock.

In the end, choosing when to lock your rate is about committing to an interest rate where you feel confident in your ability to make your monthly mortgage payments.

Gif: Green Lock Entering From Left

Once you lock your rate, you’ll still have flexibility.

The idea of locking may seem limiting, but you’re not actually handcuffed to one final option. In fact, you’ll still be able to:

  • Select a different type of loan: When you lock your mortgage rate, you’re essentially requesting that we hold all of the rates available to you across all of our products for that day. So for example, if you later decide to change from a fixed-rate to an adjustable-rate mortgage, we’ll honor the original day’s rates for whichever loan type you choose.
  • Change your mind on taking credits versus paying points: When you lock your rate, you’re also locking all of the points and credit options associated with that rate. For instance, if you decide later on that you want to pay more points up-front for a lower rate, we’ll do that math based on the original rate you locked.
  • Make changes to your application: Even after you lock your rate, you can still make changes to your loan amount or add a co-borrower (keep in mind that actions like these may change your rate options, but they’ll still be based on the day you locked your rate).

You can lock your rate when it works for you and still adjust your options to meet your goals. If you like what you see, you can lock your rate instantly online.


Related posts

What is a VA appraisal: How they work and requirements

Understand what a VA appraisal is, how it works, fees, property requirements, and what to do if the appraisal comes in low when buying with a VA loan.

Read now

A Comprehensive Guide to VA IRRRL Refinance

Discover how a VA IRRRL can cut your rate and payment with fewer documents, no appraisal, and rolled in costs. Start your streamlined veteran refinance today.

Read now

What is a no-closing-cost mortgage? Full guide

What is a no-closing-cost mortgage? Discover how this option can reduce your upfront expenses and whether it’s the right fit for your home financing goals.

Read now

How first-time homebuyers can compete as prices rise

First-time homebuyers are getting left behind as home prices skyrocket. Follow these tips to improve your standing, without putting more money down.

Read now

Second home vs Investment Property: What's the difference?

Discover the nuances of buying a second home versus an investment property and which option may be best for your goals.

Read now

Advice for First-Time Homebuyers Facing Rising Prices

Home prices continue to rise, but the holiday season could spell opportunity for some. See multiple ways first-time buyers can get a competitive edge.

Read now

How much house can I afford with a 70k salary? Tips and more

Wondering how much house I can afford with a 70k salary? Learn budgeting tips, loan options, and key factors that impact home affordability on a $70K income.

Read now

Can you refinance a home equity loan? What you need to know

Can you refinance a home equity loan? Explore your options, including HELOCs and cash-out refinancing, and learn how to qualify for better rates or terms.

Read now

More affordable homes are hitting the market

Want to buy a home for the first time? More affordable homes are hitting the market now, giving first-time buyers more choices and a better shot at ownership.

Read now

Related FAQs

Interested in more?

Sign up to stay up to date with the latest mortgage news, rates, and promos.