Lock or Float? Timing Your Rate

You have a rate you are happy with, and your loan officer asks the question: lock it, or float and hope for better? It feels like a bet on the market — and the right framing takes the gamble out of it.

What locking does

Locking guarantees your rate for a set window while your loan closes, protecting you if rates rise. The trade is that if rates fall after you lock, you generally do not capture the drop — unless your lock includes a float-down option.

What floating does

Floating leaves your rate unlocked, so you benefit if rates fall before you lock — and you are exposed if they rise. It is a bet on short-term rate movement, which even professionals cannot reliably predict.

A clear way to decide

• If the payment at today’s rate already works and you are close to closing, locking removes risk for little cost. Take the certainty.
• If you have time and a strong stomach, floating can pay off — but treat it as the speculation it is, not a plan.
• In a clearly falling market, ask about a lock with a float-down, which captures some upside while protecting you.
• Match your lock length to your real closing date to avoid paying for a longer lock or needing an extension.