Short Answer
A rate lock is a lender's guarantee that a specific interest rate will be held for a set period, typically 30 to 60 days, while you complete your home purchase. You should lock your rate when you are comfortable with the current rate and want protection against future increases. The best time to lock is usually when you have an accepted offer and a clear closing timeline. Some lenders offer a float down option if rates drop after you lock.
Interest rates can change daily based on market conditions. A rate lock protects you from rate increases during the loan process. When you lock your rate, the lender guarantees that rate for a specific period, usually 30, 45, or 60 days. Longer lock periods typically cost more in the form of points or a slightly higher rate. You should lock your rate when you are confident in your closing timeline and you are satisfied with the current rate. Trying to time the market by waiting for rates to drop can backfire if rates rise unexpectedly. Some lenders offer a float down option, which allows you to take advantage of a lower rate if rates drop after you lock. This option usually costs extra but can provide peace of mind. Your lender should discuss rate lock timing with you and help you decide when to lock based on your specific situation and market conditions.
Bob's Advice
Redfin Senior Agent · AI Certified Agent
I have seen buyers try to wait for a better rate and end up with a worse one. The old saying in real estate is that you marry the house and date the rate. If the rate works for your budget, lock it in and move forward. You can always refinance later if rates drop. The most important thing is getting into the home that works for your family. Your lender will guide you on when to lock, but do not let rate anxiety paralyze you from making a good decision.
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