Quick Answer
Lock if the rate is acceptable and your closing is near; float only if rates are trending down and you are far from a contract. A lock guarantees your rate and points, while floating exposes you to market moves in both directions. I recommend locking once you are under contract with a closing date. The certainty of a locked payment beats the gamble of a lower number. Ask Patrick how locking vs floating your rate would work for your timeline.
Here is the money problem, Patriot Nation: the rate you choose today sets your payment for the next 30 years, and the market reprices every single day. Do you lock in certainty, or float and hope the numbers fall your way? It is a five-minute decision with decade-long consequences, so let's make it a smart one.
What locking your rate actually means
The term: the guarantee. A rate lock holds your interest rate and your points for a set window, so the payment you are quoted is the payment you get at closing.
The meaning: locking removes the guessing. Whatever the market does while your loan processes, your locked terms do not move.
The money: the rate is the single biggest lever on your monthly payment. Locking freezes the math so your budget stays real from offer to keys.
The real-world consequence: the trade is simple. You give up the chance at a lower rate in exchange for protection if rates rise.
When to lock your rate
The term: the timing. Lock once you are comfortable with the current rate and your closing is inside the window, typically 30 to 45 days out.
The meaning: the surest moment is after you are under contract with a closing date. The deal is real, the timeline is set, and the lock can do its job.
The money: if rates rise between now and closing, your locked payment is protected. If rates fall, you stay at your number unless you have a float-down option.
The real-world play: a rate that works for your budget today beats a rate that might not be there tomorrow. Lock when good enough is genuinely good enough.
When to float your rate
The term: the gamble. Floating means you leave your rate uncommitted, betting it will drop before you need to lock.
The meaning: it only makes sense when closing is far off, think 60 plus days, and rates are clearly trending down. Watch the market signals, not your gut.
The money: the risk is a rise. If rates move against you, your monthly payment grows and you may be priced out of the home you wanted.
The real-world consequence: historically, trying to time rate locks rarely works. Borrowers who locked at the first acceptable rate generally came out ahead of those who waited for a better number.
Your risk tolerance decides
The term: the honest question. Can your budget absorb a higher rate if you wait?
The meaning: if a rate increase would break your budget or force you into a cheaper house, you are not floating, you are gambling with your down payment.
The money: a cushion changes the math. If you have room in your payment, floating is a real option.
The real-world play: when you cannot afford the downside, lock regardless of the market outlook. Certainty beats a gamble.
The bottom line
The term: the call. Lock when the rate works and closing is near; float only when you can genuinely afford the risk.
The meaning: most buyers do not have the flexibility to time the market, and they do not need to. The goal is a house you can afford at a payment you can live with.
The money: your Loan Estimate locks in the numbers that matter. A float-down can hedge your bet if your lender offers one.
The real-world play: if the rate works for your budget, lock it and move on to the fun part: the new house. Make it a great one.
Ask Patrick about locking vs floating your rate
Get a straight answer on locking vs floating your rate, from the window and costs to the timing that fits your closing.