Lock It or Float It? What a Mortgage Rate Lock Really Means for Florida Buyers

By Jorge R. Regalado, CEO — NEWLOANCO · Oct 29, 2026 · 6 min read

You found the house — maybe a bungalow in Winter Park, a townhome in Tampa, or a new build outside Jacksonville. Your offer is accepted, and then comes the question that makes every buyer pause: Should I lock my rate now, or wait and see if rates get better?

There is no magic answer, but once you understand what a lock actually does, the decision gets a lot less stressful.

What a rate lock actually is

A rate lock is a lender's commitment to hold a specific interest rate and price for your loan for a set number of days while your file moves through underwriting and closing. While you are locked, market swings do not change your rate — for better or for worse.

Floating is the opposite choice: your rate moves with the market until you lock. It can pay off if pricing improves, but a bad week in the bond market can also raise your payment right before closing.

A lock is not a loan approval. You still have to clear underwriting, appraisal, title, and insurance — it only protects the pricing while that work happens.

How long should the lock last?

Locks are commonly offered in windows such as 30, 45, or 60 days. The right window is the one that comfortably covers your real closing date, with a little cushion.

That cushion matters in Florida. Condo and HOA document reviews, insurance binders, survey questions, and — during storm season — weather delays can all stretch a timeline by a few days. An expired lock can sometimes be extended, but extensions may carry a cost and are not automatic. A slightly longer lock up front is often cheaper and calmer than scrambling in the final week. Ask: If everything takes a week longer than planned, are we still covered?

Three questions that make the lock-or-float decision easier

1. Can I afford the payment if rates move against me? If today's pricing already stretches your budget, floating is a gamble you probably cannot afford. Locking buys certainty, and certainty has real value when you are also budgeting for moving costs, insurance, and taxes.

2. How close are we to closing? The longer the road to closing, the more time the market has to move — in either direction. Buyers closing in two or three weeks have less to gain from floating, and less time to recover if pricing worsens.

3. What is actually moving rates right now? Rates respond to inflation reports, jobs data, and Federal Reserve signals — not to headlines alone, and not in a straight line. Nobody can time the market perfectly. A good strategy is to lock when the payment works for your budget, rather than holding out for a perfect day that may not come.

For illustration only: on a hypothetical $400,000, 30-year fixed loan, principal and interest would be about $2,661 a month at 7.000% and about $2,797 a month at 7.500%. That roughly $136-a-month difference — before taxes, insurance, and any HOA dues — is why the lock decision deserves a conversation, not a coin flip. These figures are a hypothetical example for illustration only; they are not a quote, an offer, or a rate available to any borrower.

What about a float-down?

Some locks include a one-time float-down: if pricing improves meaningfully after you lock, you may be able to take the improvement once, under set conditions. Float-downs are not on every program, the improvement usually has to clear a minimum threshold, and there may be a cost. Ask before you count on one — it is a nice safety valve, not a standard feature.

Where buydowns fit in

A temporary rate buydown is a different tool, and buyers in Orlando, Tampa Bay, and Jacksonville are seeing it in more offers. A seller credit pre-pays part of your interest, so your payment starts lower for the first year or two, then steps up to the full note rate. Your locked rate does not change — the buydown changes how the early payments are covered. It can help a deal work without a price cut, and eligibility and terms vary by program.

The bottom line

Lock when the payment fits your life and the lock period covers your closing date. Float only when you have budget room to absorb a move the wrong way — and a clear deadline to lock no matter what.

Jorge R. Regalado, Mortgage Broker, NMLS 1243458 · NEWLOANCO, NMLS 1369124 · 305-962-1170. Equal Housing Lender. This article is for general education only and is not a loan offer, rate quote, or commitment to lend. All loans are subject to credit review, underwriting approval, and program eligibility; assistance and buydown programs are subject to eligibility and funding availability, which change over time.