Should I lock my mortgage rate?
Locking can protect you from rates rising before you close. Floating leaves room for improvement, but it also keeps market risk open. Here is how to weigh the tradeoff for your own timeline.
A rate lock holds a lender's rate offer for a set window so a market move cannot raise it before you close. Locking can make sense when you are comfortable with the current quote and want certainty; floating keeps the chance of improvement open but also keeps the risk that rates rise. The right call depends on your closing timeline and how much uncertainty you can absorb, and I help clients make that decision case by case.
How a rate lock works
When you lock, the lender commits to a rate offer for a defined period, commonly tied to your expected closing date. If the market moves up during that window, you keep your locked rate. If your closing slips past the window, an extension may be needed and can carry a cost, so the lock window needs to match the real contract timeline.
Locking removes uncertainty. You trade the chance of a lower rate for protection against a higher one.
Lock or float: weighing the tradeoff
A lock is usually considered when you are comfortable with the quote, your closing is in sight, and protection from an upward market move matters. Floating only helps if rates fall before you close, and it exposes you to the opposite. For many buyers on a firm timeline, the question is whether certainty matters more than trying to catch a better market move.
I talk this through with every client based on Austin or Texas contract dates, lender lock terms, and risk tolerance rather than a blanket rule.
What if rates drop after I lock
Some programs offer a one-time float-down that may let you pursue a lower rate if the market improves meaningfully after you lock, subject to the lender's terms. Where it is available, I will point it out. If rates fall substantially after you close, a refinance may be worth reviewing.
All locks, float-downs, and loans are subject to program terms, credit approval, and eligibility.
Common questions
Should I lock my mortgage rate or float?
A lock is usually considered when you are comfortable with the quote and want protection from rates rising before you close. Floating keeps market risk open, including the risk that rates go up instead. For buyers on a firm Austin closing timeline, the practical question is whether payment certainty matters more than trying to catch a better market move.
How long does a rate lock last?
Locks run for a set window, commonly aligned with your expected closing date. If closing slips past the lock window, an extension may be available and can carry a cost, so it helps to align the lock with a realistic timeline.
What should I ask before locking my mortgage rate?
Ask how long the lock lasts, what happens if the closing date changes, whether an extension can carry a cost, whether a float-down is available, and what market movement would change the plan. Those answers make lock versus float a risk conversation, not a guess.
What happens if rates drop after I lock?
You generally keep your locked rate, but some programs offer a one-time float-down that may let you pursue a meaningful improvement, subject to the lender's terms. If rates fall substantially after closing, a refinance may be worth reviewing. I will point out whether a float-down is available.
Not sure whether to lock?
Tell me your contract dates and I will walk through lock versus float for your file. Watch the market with me on Rate Watch in the meantime.