You are in contract to buy your dream home, your interest rate is locked, and suddenly your lender calls to tell you that you have to accept a higher mortgage rate. It is every homebuyer's absolute nightmare, and as a mortgage lender with twenty years of experience, it is my nightmare too. My team is one of the top purchase teams in America, and we do everything we can upfront to avoid ever having to make that stressful phone call. While there are legitimate reasons your rate could go up after locking, some lenders will lie and blame the financial markets when they simply failed to lock your rate in the first place. If you want to work with a team that values honesty and helps people achieve homeownership every single day, you can reach us at 786-933-2077.
Why You Need a Written Paper Trail
If a lender tells you that your rate has to go up because of recent market fluctuations, but you believed your rate was already locked, they likely never locked you at all. To prevent this, I always recommend talking to your lender about locking your rate very early in the transaction. On my team, we try to lock you on day one because we can renegotiate if rates happen to improve. If a lender quotes you a rate of six percent with no points and no lender fees, and you want that deal, you must tell them verbally to lock it and immediately back it up with an email.
Send an email asking them to confirm that you are locked at that specific rate with no points and no lender fees. Having a written paper trail is the best way to ensure there is no miscommunication. Sometimes a client will email me to confirm their lock, and on the rare occasion where we are not on the exact same page, we can clear it up instantly rather than discovering a misunderstanding thirty days down the road. This practice is part of our zero stress mortgage process, and it will help you sleep much better at night.
The Impact of Loan to Value Changes
There are three legitimate reasons a mortgage rate can change while you are in contract, and the first is a change in your loan-to-value ratio. Imagine you plan to buy a home with a thirty percent down payment, but the appraisal comes in low, forcing you to use ten percent of your funds to cover the appraisal gap. Now you are only putting twenty percent down. Because lenders price loans based on risk factors, changing your down payment can alter your interest rate, particularly on an investment property.
This pricing is governed by loan-level pricing adjusters, which are entirely public information. You can search the Fannie Mae or Freddie Mac loan-level pricing adjusters online to see exactly how different loan-to-value brackets affect pricing. Interestingly, due to how these adjusters are structured, a first-time homebuyer putting three percent down might actually get a better rate than someone putting twenty percent down, though the latter avoids mortgage insurance. We see these loan-to-value adjustments play out even more frequently with cash-out refinances when an appraisal comes back lower than expected.
How Credit Score Fluctuations Affect Rates
The second legitimate reason your rate might change is a shift in your credit score. Generally, lenders do not want to run your credit again during a transaction because it introduces unnecessary risk and headaches. However, if your credit report expires in the middle of the transaction, the lender has no choice but to pull a new one. If your score was a seven hundred sixty when we first pulled it, but it drops to a six hundred eighty by the time we must rerun it, your rate will definitely take a hit.
Because of this, I strongly advise against playing credit games while you are in contract. Some clients see their consumer-facing credit score go up slightly and ask us to repull their credit to get a better pricing tier. I discourage this because consumer-facing scores rarely match the official credit reports that lenders use, and you risk your score coming in lower. The same warning applies to rapid rescores or paying off credit cards during a fully underwritten pre-approval. Do not make sudden credit changes when you are already in the process of buying or refinancing.
Shady Loan Program Changes and Tricks
The third legitimate reason for a rate change is switching your loan program, such as moving from an FHA loan to a conventional loan. You cannot simply carry an FHA interest rate over to a conventional program because they are completely different financial products. Unfortunately, this is also where some shady lenders pull a classic bait-and-switch. They might quote you an incredibly low rate meant for a specific low-income program that they already know you do not qualify for, just to win your business.
Once you fill out a bare-bones application, they lock that low rate. Weeks later, after the file finally goes through underwriting, the underwriter flags that you make too much money for that program. The lender then claims there is a change in circumstance and forces you into a higher rate. It is a highly deceptive practice that unfortunately happens all too often in our industry. My team refuses to play these games because I value my integrity and want to sleep peacefully at night, even if it means we lose some business to dishonest competitors.
The Bottom Line
If your lender suddenly tells you that your locked rate must go up, you need to ask them for the exact reason. For conventional loans under Fannie Mae and Freddie Mac, these rules are public, though jumbo loans, VA loans, and FHA loans are handled differently. If you want a second opinion on a quote or feel like you are being taken advantage of, please reach out to me or Sandy on my team. You can call us six days a week, Monday through Saturday, at 786-933-2077, and we will gladly tell you if your lender is being legitimate or if you are dealing with a deceptive trick.