What Is Float-Down?
When you lock a rate, you're protected if rates rise—but you're stuck if they fall. A float-down gives you a one-time (or sometimes multiple) chance to capture a lower rate if the market moves in your favor before closing. Lenders charge for this—either an upfront fee, a higher lock rate, or both. It's a form of rate insurance. Useful when you have a long escrow (45+ days) and expect interest-rate-cycle volatility. Check your closing disclosure and lock agreement for the exact terms—not all locks include float-down, and the rules vary by lender.
A float-down is an option that allows you to reduce your locked mortgage rate if market rates drop between the time you lock and closing. You pay a fee (or accept a slightly higher initial lock) for the right to "float down" to the lower rate.
At a Glance
- What it is: Right to lower your locked rate if market rates drop before closing
- Cost: Upfront fee or higher initial lock rate
- Typical trigger: Rate must drop by 0.25%–0.50% to exercise
- Use case: Long escrows, uncertain rate environment
- Documentation: Lock agreement, closing disclosure
How It Works
The rate lock trade-off
Locking a rate fixes your payment for 30–60 days. If rates rise, you're protected. If they fall, you're stuck—unless you have a float-down. The float-down is the lender saying: "We'll let you capture a drop, but we're not giving it away for free."
How float-down is priced
- Upfront fee: Pay $500–$1,500 at lock for the option. If you exercise, you get the lower rate. If you don't, you've paid for insurance you didn't use.
- Higher lock rate: Accept a rate 0.125%–0.25% above the standard lock. That's the "premium" for the float-down. If rates don't drop, you've paid more. If they do, you float down to the market rate.
- One-time vs multiple: Some float-downs allow one adjustment; others allow multiple (e.g., every 2 weeks) until a cutoff date.
The trigger
Lenders typically require the market rate to drop by a minimum amount—0.25% or 0.50%—before you can float down. You can't nickel-and-dime them for a 0.125% move. The trigger protects the lender from administrative churn.
Timing
Float-down must be exercised before closing. There's usually a cutoff—e.g., 5–7 days before closing—after which you can't change. Plan accordingly. If rates drop the day before closing, you may be too late.
Real-World Example
James locks a fixed-rate mortgage at 6.75% for a $320,000 loan on a rental in Tampa. He pays a $750 float-down fee at lock. Escrow is 45 days.
At day 30, the Fed signals a cut. Market rates drop to 6.25%. James's float-down allows a one-time adjustment if the rate drops 0.25% or more. It has. He exercises the float-down. New rate: 6.25%. His payment drops from $2,075 to $1,970—$105/month. Over 30 years, that's $37,800 in savings. The $750 fee was a bargain.
If rates had stayed at 6.75% or risen, he'd have paid $750 for nothing. In a volatile interest-rate-cycle, the float-down was a reasonable bet.
Pros & Cons
- Capture rate drops without re-locking (which can reset fees)
- Peace of mind in uncertain rate environments
- One fee for the option—no per-adjustment cost
- Can significantly reduce lifetime interest on large loans
- Fee or higher lock rate—costs money even if unused
- Minimum drop required—small moves don't qualify
- Cutoff date—must exercise before closing
- Not all lenders offer it; terms vary widely
Watch Out
Read the lock agreement: Float-down terms are in the fine print. What's the trigger? The fee? The cutoff? Don't assume—verify.
Long escrows: Float-down makes most sense when you have 45+ days to close. Short escrows (21 days or less) give rates little time to move. The fee may not be worth it.
Refinance alternative: If rates drop after you close, you can always refinance. Float-down is for capturing the drop before closing. If you're 2 weeks from close and rates just dropped, float-down helps. If you closed 6 months ago, refinance is the tool.
Compare to no float-down: Some lenders offer a lower base rate with no float-down. If you're confident rates won't drop, skip the option and take the lower lock.
The Takeaway
Float-down is rate-drop insurance. Pay a fee or accept a higher lock for the right to capture a lower rate before closing. Worth considering for long escrows in volatile interest-rate-cycle environments. Read the terms, know the trigger and cutoff, and decide if the cost is justified for your situation.