What happens if rates drop after I lock?

With a standard lock, you keep your locked rate. Some lenders offer a float-down option — usually requiring a meaningful market drop (0.25%+) and sometimes a fee — that lets you capture part of the improvement. Ask about float-down terms before locking, not after.

How long can you lock a mortgage rate?

Standard locks run 30–60 days, matching typical closing timelines. Extended locks of 90 days to 12 months exist for new construction, usually costing an upfront fee or slight rate premium — often worth it for builds in a rising-rate environment.

What if my lock expires before closing?

Extensions cost roughly 0.125–0.375% of the loan amount depending on length. This is one reason lender speed matters: a lender who closes in under 30 days rarely needs extensions, while slow retail queues turn lock extensions into a recurring tax.

Rates & Strategy

Should You Lock Your Mortgage Rate? Lock Strategy for Utah Buyers

By Chad Knowles, Owner/Broker NMLS #968860 · Published June 30, 2026

Short answer: Lock your rate when the monthly payment works for your budget — not when you think rates have bottomed. Nobody reliably times the bond market, including lenders. The practical strategy is locking a payment you’re happy with, choosing a lock period that comfortably covers your closing timeline, and knowing your float-down terms in case the market moves your way.

How a rate lock actually works

A lock is the lender’s written commitment to a specific rate and points for a set window — typically 30, 45, or 60 days. Until you lock, your quote floats with the market and can change daily (sometimes intraday). Once locked, market moves stop affecting you in either direction, unless your loan details change (loan amount, credit score, appraisal surprises), which triggers repricing.

When to lock: a decision rule, not a prediction

Ask two questions:

Does the payment at today’s rate fit comfortably? If yes, the downside of locking is only opportunity cost; the downside of floating is a payment you can’t afford. Asymmetric risk — lock.
Is closing inside 60 days? If yes, you’re eligible for standard lock pricing. Floating “to see what happens” during a 30-day escrow is gambling with your housing.

The refinance version is even simpler: you already ran the break-even math at a specific rate. If the math works, lock the rate that makes it work.

Float-downs, buydowns, and other fine print

Float-down options let you re-lock lower if the market improves meaningfully (usually 0.25%+). Terms vary a lot between lenders — one advantage of a broker is choosing a lender whose float-down terms are actually usable.
Locking with points is a separate decision — see our buydown guide. In a falling-rate environment, paying points to lock is often paying for something the market may give you free next year.
New construction needs extended locks (90 days to 12 months). Builders’ preferred lenders sometimes price these well; sometimes their “incentive” costs more than an independent extended lock. We quote against builder lenders weekly — make them compete.

The Utah wrinkle: speed is lock insurance

Every lock has an expiration, and extensions cost real money. A lender who reliably closes in under 30 days lets you use shorter, cheaper locks and never pay extension fees. That’s been our model since 2019.

Floating or locking on a purchase right now? Get a free quote with today’s pricing and our honest read on your specific timeline.