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Module Your Mortgage Plan, explained

Locking your rate

The question: When should I lock my rate, and for how long?

For: Buyers under contract and homeowners ready to refinance

2-minute readFrom Stage 3: Shopping smartLast reviewed October 2026

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The short version

A rate lock is the lender's promise to hold your rate, points and lender credits until a set date, as long as you close by then and your application does not change. Locks commonly run 30, 45 or 60 days. Longer locks usually cost somewhat more, so the right lock is the shortest one that safely covers your closing date.

Mortgage rates tend to follow the bond market, so they can move every day with the news: inflation, jobs reports, the Federal Reserve and events around the world. Good news for the economy often means higher rates, and bad news lower ones, but surprises happen both ways. Nobody can time it, and that includes us.

When you can lock. For a purchase, a rate can be locked once there is an accepted contract on a home, your application documents are in, your credit has been pulled, and the loan is structured and approved through automated underwriting. For a refinance, it is the same without the contract. Some lenders offer a lock while you shop, before there is a contract. It is expensive, and we can show you its cost in your Mortgage Plan.

Waiting for a better rate is a bet. Locking when the numbers work is a decision.

How we lock. When you are ready and the numbers look right, we lock. We will tell you what is moving the market. We will not tell you where it is going.

After the lock. The lender sends a revised Loan Estimate within three business days, and page 1 shows the lock and when it ends. From then on, the work is to close before that date. A locked rate can still change if your file changes: a different loan amount or down payment, an appraisal that comes in high or low, a credit change, or income that cannot be documented.

Rural files often need more time. Appraisers covering acreage, wells and septic, or one-of-a-kind homes can take longer to schedule, and water tests, septic inspections and surveys add days. In building season, contractors and inspectors are often fully booked. It is better to build that cushion into your lock than to pay for an extension later.

Try it

Move the rate up or down to see how the payment changes before you lock.

Go deeper

Choosing a lock period

Start from the closing date in your contract and count back. Then add a cushion for the steps that can run long: the appraisal and any repairs it calls for, inspections, title work and HOA documents.

A purchase lock is usually tied to a specific property, so it starts once you are under contract and the other conditions for a lock are met.

A lock that is slightly too short can cost more than a longer one once you add an extension. We price both for you before you choose.

Extensions and expired locks

If closing slips past your lock date, most lenders will extend the lock for a fee, often quoted as a fraction of a point for a set number of days. Your Loan Estimate will not show extension costs, so we tell you the cost before you lock, and who pays if a delay is the lender's.

If a lock expires, you will need to relock. Many lenders relock at the worse of your original pricing or today's market. Policies vary, so we confirm the lender's relock policy before you lock.

Float-downs

A float-down lets you lower a locked rate if the market improves before closing. Terms vary widely:

  • Rates must fall by a set amount first.
  • You can use it once, often only within a window before closing.
  • It may cost a fee or slightly higher pricing up front.

A float-down works like insurance. It is worth it only when the cost is small compared with the savings you would realistically see.

New construction and renovation

New builds and large renovations can take months, longer than a standard lock. You have two choices: an extended lock, which costs more because the lender carries the risk longer, or floating and locking closer to completion.

An extended lock protects your budget if rates rise during the build. Floating keeps the cost down if they do not. We price both in writing, and you weigh them against how much a rate rise would strain your budget.

Your next step

Step 10 of 16Mortgage insurance, explainedMortgage insurance lets you buy with less down. Here is what it costs on each loan type, how it is paid and when it comes off.Go to step 10