You lock your rate Monday morning at 6.75%. By Thursday, the market has fallen and new locks are going out at 6.25%. You feel stuck—except your lender offered a float-down option when you locked. Here's how these provisions work and what they actually cost.
What a float-down provision is
A float-down is a rider to your rate lock that lets you re-lock at a lower rate if the market improves during your lock period. You pay for the option at the time of the original lock, either as a flat fee or as a slightly higher initial rate. If rates fall enough to meet the lender's threshold, you exercise the float-down once; if rates rise or stay flat, you proceed with your original lock and the fee is sunk cost.
Typical cost structures
Most lenders charge 0.125% to 0.25% of the loan amount as an upfront fee—on a 400,000 dollar loan, that's 500 to 1,000 dollars. Some build the cost into the note rate instead, adding 0.125% to your locked rate in exchange for the option. A third structure combines a smaller fee with a smaller rate adjustment. The trade-off: pay cash now for flexibility, or accept a higher rate that you're stuck with if the market doesn't move in your favor.
Trigger thresholds and timing windows
Float-down provisions are not automatic. The new market rate must improve by at least 0.25% to 0.50% from your original lock—a 6.75% lock typically needs the market to fall to 6.50% or lower before you can exercise. You also face timing restrictions: many lenders require you to float down at least five to ten business days before closing, and you get only one opportunity to re-lock. Miss the window or fail to meet the threshold, and the option expires unused. These figures are illustrative; rates and products are subject to change and this is not a commitment to lend.
When the option makes sense
Float-downs are worth considering when volatility is high, your lock period is long (45 or 60 days), and the Federal Reserve or bond market signals possible easing ahead. They make less sense in a stable or rising-rate environment, on short 15- or 21-day locks, or when the fee pushes your closing costs beyond comfort. Run the math: if you pay 750 dollars for the option and rates drop enough to save you 85 dollars a month, you break even in nine months—but only if the drop actually happens and you exercise in time.
The Alliance take
Float-down provisions are insurance, not a guarantee. They cost real money and come with real restrictions. If you're locking during a Fed pivot or ahead of a major employment report, the option can be a sensible hedge. If the market is calm or you're closing in three weeks, you're usually better off putting that fee toward points or reserves. Want to model the scenarios for your loan? Use our APR calculator or start an application to discuss lock strategies with your loan officer.