Rate locks: how to protect your rate

In depth

Why rate locks exist

Mortgage rates move with the market, sometimes daily. Between the moment you apply and the day you close, weeks can pass — and without protection, a rate you were counting on could change before your loan funds. A rate lock solves that: it’s a commitment to hold your rate for a defined window while the loan is processed, giving you certainty to plan around.

A lock is tied to a specific lock period — commonly 30, 45, or 60 days, though other lengths exist. The period needs to be long enough to comfortably reach closing. Lock too short and you risk the lock expiring before you close; lock unnecessarily long and there can be trade-offs. Choosing a sensible lock period for your timeline is part of the strategy, and it’s something your loan originator helps you judge based on where your transaction stands.

Extensions, expirations, and float-downs

Sometimes a closing slips — an appraisal takes longer, a document is outstanding, a closing date moves. If your lock is set to expire before you close, a lock extension can hold your rate longer, though extensions may carry a cost. The best defense is a realistic lock period and a responsive process that keeps the loan moving, which is part of why working with a proactive originator matters.

Some situations also allow a float-down — an option that lets you take advantage if rates improve meaningfully after you’ve locked, so you’re protected from rises but can still benefit from a significant drop. Availability and terms for float-downs vary, and they involve trade-offs. Whether one makes sense depends on your situation and the specifics offered, which is a conversation worth having rather than a one-size-fits-all rule.

• A lock period holds your rate for a set window — choose one that comfortably reaches closing.
• A lock extension can hold the rate longer if closing slips, sometimes at a cost.
• A float-down may let you benefit if rates drop meaningfully after locking.
• A responsive, well-managed process is the best protection against a lock expiring.

Locking with confidence

The goal of a rate lock is peace of mind — removing one major uncertainty from an already busy process. You don’t need to become an expert in timing the market; you need a clear plan for your specific transaction, and a loan originator who manages the lock and the process together so the two stay aligned. When the loan moves efficiently, the lock does its job quietly in the background.

Because this page doesn’t quote rates or terms — those depend on the market and your situation and are set by a licensed loan originator — the most useful next step is simply to talk through your timeline. We’ll explain the lock options that fit your scenario and manage the process so your rate is protected through to closing, with no obligation to proceed.

It’s also worth keeping locks in perspective. A lock is a tool for certainty, not a game to be won by perfectly timing the market — something virtually no one does consistently. The healthier mindset is to lock when you have a rate you’re comfortable with and a clear path to closing, then let the process do its work. Trying to squeeze out the last basis point by waiting can backfire if the market moves against you, and the peace of mind a sensible lock provides is usually worth far more than a speculative gamble.