Guides for loan officers

Pre-Approval Is Not a Rate Lock

By Travis · October 27, 2026 · 2 min read

Few misunderstandings in a home purchase cause as much frustration as this one. A buyer gets pre-approved, sees a rate mentioned during the process, and reasonably assumes that rate is theirs. Weeks later, under contract, the rate has moved and the payment is different, and the buyer feels something was taken away. Usually, nothing was taken away. The rate was never locked, because a pre-approval is not a lock.

What a pre-approval actually does

A pre-approval is a lender's review of your income, assets, debts, and credit, leading to a statement that you appear qualified to borrow a certain amount, subject to the property and final underwriting. It tells sellers and agents that you are a serious, checked-out buyer. It is about you.

A pre-approval does not reserve a rate, and it does not guarantee final approval. The rate figures discussed during pre-approval are simply the rates available that day, used to estimate a payment.

What a rate lock actually does

A rate lock is a lender's commitment to hold a specific rate and price for a set period, usually tied to a specific property under contract. It is about the loan, at a moment in time. Locks have expiration dates, and they are normally made once you have a contract, because the lock period needs to cover the time to closing.

Between pre-approval and lock, rates float with the market. They can move up, down, or sideways, sometimes by enough to change the payment in a way that matters.

When the lock conversation should happen

The honest answer is that lock timing is a judgment call, and anyone who promises to time the market perfectly is guessing. What a good loan officer can do is make the choice a conscious one. When you go under contract, ask three questions. What is today's rate and payment? What happens to my payment if rates rise a quarter point before closing? And if rates fall after I lock, what, if anything, can be done?

Buyers who have had that conversation rarely feel ambushed. Buyers who have not are the ones calling in a panic three days before closing.

The point for your clients

Most buyers will do this a handful of times in their lives, so the vocabulary is new to them even when it is daily language to you. A plain explanation of pre-approval versus lock, sent before they start shopping, prevents one of the most common sources of stress in the whole process.

LO Market Update exists for exactly that kind of explanation: a monthly update under your name that teaches your clients how this actually works, in plain language, so they come into the process calmer and better prepared.

← All guides