Pre-qualify

Rate lock vs. float: when to lock in your mortgage rate

June 25, 20262 min readHelloLend Team

Once your mortgage application is in, you face a decision that can quietly cost or save you thousands of dollars: lock your rate now, or let it float in hopes of a better one.

Lock or float
LockFloat
Your rateGuaranteed for 30, 45 or 60 daysSet closer to closing
If rates riseYou're protectedYour payment rises with them
If rates fallHeld to the lock, unless you have a float-downYou benefit
Fits whenRates are rising or closing is nearRates are falling and closing is further out

A float-down option, for a fee, allows one reset if rates drop before closing.

What locking and floating mean

A rate lock guarantees your quoted rate for a set period, typically 30, 45 or 60 days, regardless of what happens in the market. If rates rise during that window, you're protected. If rates fall, you're held to your locked rate unless your lender offers a float-down option.

Floating means you don't lock, and your final rate is set closer to closing. If rates drop, you benefit. If they rise, your payment rises with them.

When each one makes sense

Locking tends to make sense when:

  • Rates are trending upward
  • You're close to closing and don't want to risk volatility
  • The current rate already supports the payment you're comfortable with

Floating tends to make sense when:

  • Rates are clearly trending downward
  • You have a longer closing timeline and time on your side
  • You can afford a slightly higher payment if rates rise against you

The middle path: a float-down

With a float-down option, your lender allows one rate reset, for a fee, if rates drop before closing. It costs more upfront but gives you the security of a lock with some of the upside of a float.

Most borrowers benefit more from locking early than from trying to time the market.

Predictability has real value when you're making one of the largest financial decisions of your life.

Published June 25, 2026 by the HelloLend Team. General information, not legal or financial advice. Talk to your loan officer about your own loan. This is not a commitment to lend or extend credit.

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