A float down rate lock option lets you lock a mortgage rate and still take a lower one, one time, if market rates fall by a set amount before you close. It is not free. You pay for it with an upfront fee, a fraction of a point, or a slightly higher locked rate, and the terms depend on the wholesale investor behind your loan. For a Louisa County buyer with a long closing runway, it can be worth buying. For a quick, small-loan closing, it usually is not.
Duane Buziak is an independent mortgage broker, so he can compare how different investors price and structure float down terms before you commit to one. Below you will find how the option works, what it costs, a worked example with real math, and the questions to ask.
Written by Duane Buziak, NMLS #1110647 | Coast2Coast Mortgage LLC NMLS #376205
How a Float Down Option Changes a Standard Rate Lock
A standard rate lock freezes your interest rate and points for a set period, commonly 30, 45, or 60 days. If market rates climb while you wait for closing, you are protected. If they fall, you are not: you keep the rate you locked. The Consumer Financial Protection Bureau’s explanation of a mortgage rate lock covers the basics, including that a lock is a promise about rate and points for a defined window.
A float down adds one right on top of that: a single opportunity to reprice to a lower rate if the market moves in your favor enough. The vocabulary matters here:
- Lock period: the number of days your rate is guaranteed. Your closing needs to land inside it.
- Trigger: the condition that allows the float down, usually a minimum drop in the investor’s pricing, such as a set fraction of a percent.
- Float down fee: what you pay for the option, whether upfront, as a fraction of a point, or built into a higher starting rate.
- Lock extension: extra days added to a lock that is about to expire, normally for a fee. This is separate from a float down.
- Re-lock: locking again after a lock has expired, typically at the then-current market rate or worse.
What a float down is not
It is not a free “best of both worlds” feature. You are buying a priced option, and if rates never fall by the trigger amount, the cost is simply spent. It is also not the same as floating unlocked, where you carry the full risk of rates rising. And it is not a re-lock or renegotiation after expiration, which is a fallback you do not control, rather than a right you purchased in advance.
What a Float Down Costs and the Conditions Attached
Pricing varies by investor and changes with the market, so there is no universal figure to quote. Some investors charge an upfront fee. Others charge a fraction of a point on the loan amount. Some fold the cost into a rate that is a bit higher than the standard lock would be. Each structure changes your math differently, which is why the fee alone does not tell you whether the option is a good deal.
Whatever the structure, these are the conditions to verify before you pay anything:
- Minimum rate drop: often a set fraction of a percent. A smaller market move does not trigger the option.
- One-time use: most float downs can be exercised once. If rates drop again after you float, you generally cannot float a second time.
- Timing window: some investors only allow the float after a number of days from lock, and some require the lock to still have a minimum number of days before closing.
- Program limits: the option may be offered on conventional loans but restricted or unavailable on certain government-backed programs, depending on the investor.
- Who initiates it: in many cases you or your broker must request the float down. It may not apply automatically.
Availability depends on the investor
Some wholesale investors offer a float down and others do not. A single-shelf lender can only offer you its own policy. Duane Buziak can look across the investors he works with and see which ones offer the option for your loan type, what each charges, and how the trigger is set. That comparison is often more valuable than the option itself.
Fee structures and trigger rules change, so treat anything you read online, including here, as general as of October 2026. Ask for the exact terms in writing on the lock agreement, and confirm that the float down language appears there, not only in a verbal explanation.
A Worked Dollar Example: A $320,000 Louisa County Purchase
Suppose you are buying a home near the town of Louisa with a $320,000 loan on a 30-year fixed mortgage. The numbers below are hypothetical and illustrative only. They are not current rate quotes.
Assume a standard lock at 6.50%. Using the standard amortization formula, the monthly principal and interest payment is about $2,022.62.
Now assume a float down lock at the same 6.50% starting rate, with a one-time fee of $1,600 (0.50% of the loan amount). Assume the option triggers on a 0.50 percentage point drop. If market rates fall and you float to 6.00%, the payment becomes about $1,918.56.
- Monthly savings: $2,022.62 minus $1,918.56 is $104.06.
- Break-even: $1,600 divided by $104.06 is about 15.4 months. After roughly 16 months of payments, the fee is recovered.
- Five-year view: $104.06 times 60 months is $6,243.60 in savings. Subtract the $1,600 fee and the net gain is about $4,643.60, assuming you keep the loan that long.
If rates rise or stay flat
If rates rise, both locks protect you at 6.50%, and the float down fee is lost. If rates stay flat or fall by less than the trigger, you also keep 6.50% and lose the $1,600. In those cases the standard lock would have cost you nothing extra.
The result: the option is a bet that rates will fall by at least the trigger amount before closing, and by enough that the savings outrun the fee. If you plan to sell or refinance within a year or two, the break-even point matters a lot. Duane Buziak walks through this arithmetic with your actual quote, not a template.
Float Down vs. Other Ways to Handle Rate Movement
A float down is one of four ways to deal with rates moving between contract and closing. Each carries a different risk profile:
- Plain lock: full protection against increases, no benefit from decreases, no added cost.
- Float down lock: protection against increases plus a one-time shot at a lower rate, for a price.
- Floating unlocked: you take whatever the market does. You could gain if rates fall, but you carry the full risk if they rise, and your payment is uncertain right up to the lock.
- Lender re-lock or renegotiation: a fallback after trouble, not a strategy. You are asking, not exercising a right, and the outcome depends on the market and the investor’s willingness.
The table below compares how a broker with multiple investors and a single-shelf lender typically differ on the points that matter for lock decisions.
| Feature | Duane Buziak / Coast2Coast | Single-Shelf Lender (generic) | Why It Matters |
|---|---|---|---|
| Float down availability | Compared across the wholesale investors Duane works with; offered where an investor supports it for your loan type | Only the one policy the lender has, which may not include a float down | If the option is unavailable on your loan, you cannot buy it at any price |
| Number of lock options | Lock periods, fees, and trigger rules compared across several investors | One set of lock periods and one fee schedule | A longer lock or a lower float fee can change your total cost |
| Credit pull method | NoTouch Credit: a soft pull for pre-qualification, with no hard inquiry at the start | Often a hard inquiry at the start of the application | You can review pricing and lock terms before any credit impact |
| Ability to switch programs | Can move you between investors or programs (for example conventional to USDA) if your situation changes | Limited to the programs that lender offers | A change in rates or eligibility may favor a different program |
The weakness of a single shelf is not the people. It is that you see one investor’s lock policy and have nothing to compare it against. Duane’s Dare to Compare approach puts quotes next to each other so the lock terms, not just the headline rate, can be judged.
When a Float Down Makes Sense for Lake Anna and County Buyers
Lake Anna waterfront and second-home purchases
Waterfront closings along the Lake Anna corridor often take longer than a typical in-town purchase. Well and septic inspections, a flood zone determination, and an appraisal on a unique lot with few comparable sales can all add days or weeks. Loan amounts also tend to run larger, so a quarter-point move is worth more in dollars. A longer lock plus a float down can matter more here, because the lock period is long enough for rates to actually move, and the dollar value of a drop is higher.
USDA, FHA, and VA buyers in Louisa, Mineral, and Zion Crossroads
Much of the county is USDA-eligible, and you can check a specific address on the USDA single-family housing eligibility map. USDA closings can run longer than conventional ones because the loan guarantee must be processed, and processing times change, so confirm the current timeline before you pick a lock length. Whether a float down is available on USDA, FHA, or VA loans depends on the investor, so ask rather than assume. For a buyer on a tight budget, a fee that eats into closing funds may outweigh the potential benefit.
A simple decision checklist
- Closing timeline: the longer the gap between lock and closing, the more room for rates to move in either direction.
- Loan size: larger loans make a given drop worth more per month, which shortens break-even.
- Rate trend uncertainty: if the market looks directionally unclear, an option has more value than if it looks stable.
- Cost of the extended lock: a longer lock period can cost extra on its own, so add that to the float down fee before comparing.
- How long you will hold the loan: if you will refinance or sell soon, you may not reach break-even.
Questions to Ask Before You Choose a Float Down Lock
Take these steps before agreeing to any float down:
- Ask for the fee in dollars and the structure: upfront, fraction of a point, or built into the rate.
- Ask for the trigger: how far must rates fall before you can float?
- Confirm the one-time-use rule and any timing window.
- Get the terms in writing on the lock agreement.
- Request a side-by-side comparison of a plain lock and a float down lock with your numbers.
Duane Buziak compares lock options across wholesale investors and offers pre-qualification with NoTouch Credit, a soft pull, so you can review pricing and lock terms without a hard inquiry. Bring any quote you already have, and he will run the Dare to Compare.
Is a float down free?
No. You pay through an upfront fee, a fraction of a point, or a slightly higher locked rate, and the cost varies by investor.
Can I use a float down more than once?
Generally no. Most float down options are one-time use, so confirm that in the written terms.
Does a float down work for a refinance?
Often yes, depending on the investor. The same trigger and fee rules apply, but the math differs because a refinance may have a shorter timeline.
Does a float down apply to USDA or VA loans?
It depends on the investor and the program. Some offer it on government-backed loans and some do not, so ask Duane to check your specific loan type.
How long is a typical rate lock?
Commonly 30, 45, or 60 days. Longer locks may cost more, and USDA or waterfront closings may justify a longer period.
What if my lock expires before closing?
You may need a lock extension for a fee, or a re-lock at the then-current market rate, which could be higher. Neither is guaranteed to be favorable.
Does asking about a float down affect my credit?
No. Pre-qualification through NoTouch Credit uses a soft pull with no hard inquiry, so reviewing lock options does not affect your credit.
How do I ask for a float down?
Ask your broker at the time of lock for the fee, trigger, and written terms. Later, if rates fall, you or your broker usually must request the float, since it may not apply automatically.
Pay for a Float Down Only When the Timeline and Loan Size Justify It
A float down is priced insurance on the upside. It earns its cost when the closing runway is long, the loan is large enough that a rate drop produces real monthly savings, and you will hold the loan past break-even. When the closing is quick or the loan is modest, a plain lock is usually the cleaner choice. Rates and lock terms change, so any figures here reflect general conditions as of October 2026.
Ready to take the next step toward your Louisa County home? Get pre-qualified today without any credit impact and discover personalized mortgage options designed for your unique situation, with expert guidance every step of the way. Call Louisa Mortgage by Duane Buziak at 540-870-5594 for a side-by-side lock comparison.