Questions About Mortgage Rate Locks and Float Downs

When you are shopping for a mortgage, one of the most confusing parts is understanding how the interest rate you are quoted today can change before you close on your home. You might hear your lender use terms like “rate lock” or “float down,” and it is important to know what these mean and what questions to ask. A rate lock is a promise from your lender that the interest rate they offered you will stay the same for a certain period of time, usually until you close the loan. A float down is a special option that lets you lower your locked rate if market rates drop during that waiting period. Asking the right questions about these two features can save you a lot of money and prevent surprises.

First, you need to ask your lender how long the rate lock will last and when it starts. Do not assume it begins the day you sign the application. Many lenders start the lock when you are pre-approved or when you have a signed purchase agreement. Ask for a clear start date and an exact expiration date. For example, a thirty‑day lock might start today and expire thirty days from now. But if your closing is delayed, even by a few days, that lock could end and you could be forced into a higher rate. So ask what happens if your closing takes longer than expected. Will they extend the lock for free? How much does an extension cost? Some lenders charge a small fee for each extra day, while others offer a one‑time extension at a set price. Knowing this helps you plan your timeline.

Next, ask whether the rate lock is tied to a specific loan program or can be transferred to a different product. Sometimes a lender offers a great rate for a particular type of loan, like a thirty‑year fixed rate. If you later decide you want a fifteen‑year loan or an adjustable‑rate mortgage, the locked rate might no longer apply. You should also ask if the lock is for a specific dollar amount. If your home appraises lower than expected and you need a larger loan, the lender might not honor the old rate. Get these details in writing so there is no confusion.

Another key question is about the cost of the rate lock. Some lenders offer free locks, while others charge a fee, sometimes called a lock fee or a rate lock fee. This fee might be a flat amount or a fraction of a percentage point of the loan amount. Ask if the fee is refundable if the loan does not close. Also ask if you can choose a longer lock period, like sixty days, for a higher fee, or a shorter lock for a lower fee. If you are buying a home in a busy market where closings often get delayed, paying a little extra for a longer lock might be worth the peace of mind.

Now, let’s talk about float downs. A float down option allows you to reduce your locked rate if market interest rates go down before you close. Not all lenders offer this, and those that do usually charge a fee. Ask if your lender has a float down policy. If yes, ask how it works. Some lenders let you float down only once, and only if rates drop by a certain amount, say a quarter of a percentage point. Others might charge a smaller fee each time you want to lower the rate. Ask whether the float down is automatic or if you have to request it. You do not want to miss out on a lower rate simply because you did not know the market moved.

Also ask what happens to the float down fee if you never use it. Is it refunded? Is it applied to your closing costs? Some lenders treat it as a non‑refundable fee, while others give you a credit. And ask whether the float down can be used with any loan product or only certain ones. For example, some lenders offer float downs only on conventional loans, not on government‑backed loans like FHA or VA.

Finally, ask your lender to explain the difference between locking your rate now and waiting. If you choose not to lock today, your rate will float with the market. That could go up or down. You might ask, “What is the risk of waiting to lock?” and “What is the benefit of locking right away?” A good lender will walk you through current market conditions and give you their honest opinion. They should not pressure you into locking just to get you to commit. Instead, they should explain that locking gives you certainty, while floating gives you a chance at a lower rate but also carries the risk of higher rates.

In summary, the most important questions to ask any lender about rate locks and float downs are: How long does the lock last? When does it start? What happens if closing is delayed? Is there a fee? Can I extend it? Do you offer a float down? How does that work? What does it cost? And can I wait to lock? Getting clear, simple answers to these questions will help you make a smart decision and avoid costly mistakes. Remember, the goal is to get a rate you can afford and keep it until you close, so take your time and ask every question that comes to mind.