Mortgage Rate Lock: When to Lock and How It Works in DC, MD & VA (2026)

With 30-year mortgage rates oscillating between the mid-6% and low-7% range through September 2026 — and the Fed widely expected to deliver another rate cut at its September 16 meeting — the question every DC, Maryland, and Virginia buyer is asking us right now is some version of "should I lock today or wait?" It is the right question, but most people frame it backwards. A rate lock is not a bet on where rates are going. It is a decision about how much certainty you want on the largest monthly bill you will carry for the next 30 years. Here is how a rate lock actually works, how long it lasts, what it costs, and how to think about the timing in the DMV.

What a Mortgage Rate Lock Actually Is

A rate lock is a written agreement between you and your lender that guarantees a specific interest rate — and often a specific set of points and lender credits — for a defined period, regardless of what happens in the bond market between the day you lock and the day your loan closes. Once the lock is in place, your rate does not move. If rates shoot up a full point the next morning, your rate stays. If rates drop a full point, your rate also stays — unless your lock includes a feature called a float-down, which we cover below.

When You Can Lock

Most lenders let you lock once you have a property address and a signed purchase contract. Some offer an extended-lock program that lets you lock before you find a home — typically with a fee or a slightly higher rate — but for most buyers the lock happens after contract acceptance and before closing. You cannot lock on a pre-approval that has no property attached, because the lender has no loan to bind the rate to.

With us, the typical timeline is: you get pre-approved (24 hours), you find a home and get a contract accepted, we send your file to the lender, and we lock the day you are ready — usually within 48 hours of contract. From there, the lock has to cover the time until closing, which is roughly 30 days on a conventional, FHA, or VA loan.

Lock Periods and How They Affect Price

Rate locks come in set lengths — most commonly 30, 45, and 60 days, with some lenders offering 75 or 90-day locks. The longer the lock, the more it costs the lender to hedge the rate in the bond market, and that cost is passed to you in one of two ways: a slightly higher rate, or a point-based lock fee.

The right lock period is the shortest one that comfortably covers your timeline. A 30-day lock on a 30-day close is the cleanest and cheapest option. If your contract has a 45-day close, a 45-day lock is safer than a 30-day lock plus a rush extension. We watch the calendar and pick the lock that fits your contract, not the other way around.

What Happens If the Lock Expires Before Closing

If your loan does not close before the lock expires, you have two options — and neither is free. The lender can extend the lock for a fee (typically 0.125% to 0.25% of the loan amount per 5-to-7-day extension), or you can re-lock at the current market rate, which could be higher or lower than your original. This is why the buyers who close on time are the ones who respond to document requests within hours, not days. A delay caused by a missing paystub can turn a 30-day lock into a 38-day lock — and that extension comes out of your pocket.

Lock vs Float: How We Think About It

"Floating" means leaving your rate unlocked in the hope that rates drop before closing. It is the more aggressive move, and in a falling-rate environment like the one we are in right now — with the Fed cutting in 2025 and another cut on the table for September 2026 — it can pay off. But floating carries real risk: mortgage rates do not move in lockstep with Fed cuts, and a single hot inflation print can push the 10-year Treasury up a quarter-point overnight, dragging mortgage rates with it. A bond-market reaction to one jobs report can wipe out a month of gradual rate improvement in a single session.

Our approach is not to gamble. We lock when the rate you have been quoted meets your budget and your goals, and we talk through the float-down option if you want to keep some upside. We do not try to time the bottom of the market — because nobody can, and the cost of being wrong on a $500,000 loan in Fairfax County is real money.

The Float-Down Option

Some lenders offer a one-time float-down (sometimes called a lock-with-float-down or a renegotiation) that lets you take a lower rate if market rates fall by a set amount — usually 0.25% — between your lock date and closing. It is not free: it typically costs 0.125% to 0.25% of the loan amount up front, and some lenders limit it to once per loan. But for a buyer who wants to lock in certainty and still capture a rate drop, it is the cleanest middle path.

How Rate Locks Differ by Loan Type

The lock mechanics are similar across conventional, FHA, VA, and non-QM loans, but the timing flexibility varies:

• Conventional — locks are typically 30 to 60 days; pricing adjusts daily with the bond market
• FHA — same lock windows; rates tend to be slightly less volatile because FHA MIP is fixed, not risk-priced
• VA — same lock windows; VA funding fee can be financed, which adds a small wrinkle to the lock amount
• Bank statement / non-QM — lock windows are often shorter (30 to 45 days) and pricing is set by individual lenders, not a daily bond-market sheet
• Construction-to-perm — the lock is often structured as a long-term lock (up to 12 months) with a separate rate at the perm conversion

What to Check Before You Lock

1. 1Confirm the lock period matches your contract close date with a few days of buffer
2. 2Confirm the locked rate, points, and any lender credits in writing — a verbal lock is not a lock
3. 3Confirm whether the lock includes a float-down option and what it costs
4. 4Confirm the lock expiration date and the extension fee structure
5. 5Confirm that nothing in your file is about to change — new credit pulls, new jobs, or new debt can break a locked loan even if the rate is set

The DMV Market Right Now

As of mid-September 2026, the 30-year fixed is sitting in the mid-6% range, with the Fed's September meeting expected to deliver another cut and forecasters (Bankrate, MBA, Goldman Sachs) projecting rates drifting toward the low-6% range through the rest of the year. Northern Virginia and close-in Maryland remain competitive — multiple offers are still common on well-priced homes — and in that environment a fast, clean lock on a 30-day close gives you certainty without slowing the deal. If you are buying new construction with a 60-to-90-day close, the longer lock or a float-down becomes more attractive, because there is more time for rates to move.

Lock With a Broker Who Watches the Market for You

A retail bank locks the rate it has. A broker shops the lock across 100+ lenders — so the rate you lock is not one bank's number, it is the best number in the market that day. We watch the bond market, we track the Fed calendar, and we tell you when to lock and when a float-down makes sense. The consultation is free, the lock strategy is built into your file, and our services cost you nothing because the lender compensates us directly. If you are under contract in DC, Maryland, or Virginia — or about to be — let us run the lock numbers for you today.