A rate lock is a lender’s commitment to hold a specific interest rate and pricing for your loan for a set number of days while you finish the purchase. If market rates rise during that window, your locked terms stay the same, as long as your loan and closing stay within the conditions of the lock. If the lock expires before you close, you may need an extension or a relock, which can change your costs.
That is the short version. The details are where Florida buyers can save themselves stress, so let us walk through them.
What a lock actually protects
Mortgage pricing moves with the bond market, sometimes several times in one day. Until you lock, the rate you were quoted is only a snapshot. Once you lock, the lender holds that rate and the related pricing, such as any points or credits, for the lock period.
A lock is tied to the loan as it was described when you locked. It generally assumes:
- The same loan program and term.
- The same loan amount and down payment, or close to it.
- The credit profile used at the time of the lock.
- The same property type and occupancy, such as primary residence or second home.
- A closing date within the lock window.
If one of those changes, for example the appraisal comes in low and the loan amount shifts, the pricing can be adjusted even though you are locked. That is not the lender breaking the lock. It is the lock being repriced for a different loan.
Choosing a lock period
Lock periods commonly come in blocks such as 30, 45, or 60 days, with longer options for new construction. Longer locks often cost more because the lender is holding the rate longer. The goal is to pick a period that comfortably covers your closing date without paying for time you do not need.
In Florida, a few things regularly stretch a timeline:
- Insurance: finding a homeowners policy for an older home or a coastal property can take longer than expected, and new policies usually cannot be bound while a named storm is threatening the area during hurricane season.
- Condo approvals: lenders review condo budgets, reserves, and questionnaires, and associations do not always respond quickly.
- Repairs and inspections: a four-point or roof issue can mean repairs before closing.
- New construction: builder completion dates often slide.
When Michael sets a lock with a buyer, he looks at these factors with the real estate agent and the closing agent, not just the date written in the contract.
When to lock
Most buyers lock once they have a signed purchase contract and a property address, since a lock is tied to a specific property. Some lenders offer ways to lock earlier, but those programs have their own rules.
No one can predict where rates are heading next week, so trying to time the market is risky. A more useful question is: what monthly payment am I comfortable with, and does today’s pricing get me there? If it does, locking removes one source of worry for the rest of the process. Run a few rate scenarios through the mortgage calculator to see how much a small change affects your payment.
Extensions, relocks, and float downs
These terms come up when timelines or markets shift. Here is how they generally differ.
| Term | What it usually means |
|---|---|
| Extension | Adding days to an existing lock, often for a cost |
| Relock | Locking again after a lock expires, often at the higher of the old or current pricing |
| Float down | An option some lenders offer to capture a lower rate if the market improves after you lock, with conditions |
| Floating | Choosing not to lock yet and accepting that pricing can move either way |
Policies vary a great deal between lenders, so ask how each of these works before you lock, not after. Our article on what to ask when a rate lock may expire before closing covers the extension conversation in more depth.
It also helps to know that locks and points work together. When you lock, you are locking a combination of rate and price. A slightly lower rate may come with discount points paid at closing, while a slightly higher rate may come with a lender credit toward your costs. Neither is right for everyone. It depends on how long you expect to keep the loan and how much cash you want to bring to closing.
If you are weighing points, see our guide to building a break-even question list for mortgage points.
Frequently asked questions
Can I switch lenders after I lock?
You can, but the lock usually stays with the original lender, so you would start over with new pricing. Switching late in the process can also delay closing. Talk it through with your loan officer before making that move.
Does a rate lock also lock in my closing costs?
A lock covers the rate and its pricing, not every closing cost. Third-party fees, insurance, taxes, and prepaid items can still change. Your Loan Estimate and Closing Disclosure show which figures can change and by how much.
What happens if rates drop after I lock?
Without a float down option, your locked terms generally stay the same. Some lenders will consider a renegotiation if the market moves a lot, but that is a lender decision and not something to count on.
If you have a contract coming together and want to talk through lock timing, Michael Akialis is glad to help from his office in Flagler Beach. You can read about Michael’s mortgage background, find more Florida mortgage guidance, or call (386) 793-5435.
Mortgage information is for educational purposes only and is not a commitment to lend or extend credit. All loans are subject to credit approval, property approval, underwriting guidelines, program eligibility, and availability. Program rules, rates, fees, and requirements can change. Michael Akialis, NMLS #832250; American Home Mortgage Group LLC, NMLS #1812447.