Nancy Chu, of Nancy Chu Homes
Here is the short version. Once you are under contract and approved for a mortgage, the fastest way to lose that loan is to change something. Do not change your job, do not take on new debt, do not move money around, and do not go quiet on your lender. Your approval is not a finish line. The lender keeps verifying your file right up to the day you close, and in North Jersey, where closings move fast and timelines are tight, the small stuff is what sinks deals. Here is what not to do during the mortgage process, and what to do instead.
Why your lender is still watching after you are approved
You got the pre-approval, you won the house, you are under contract. It feels done. It is not. Lenders re-verify employment, pull credit again, and review your bank activity right before the loan funds. Some even re-check after you have the keys. Anything that moves your debt-to-income ratio or your credit between approval and closing can change the loan you qualified for, or end it. The rule for the next few weeks is simple. Keep everything boring.
1. Do not change your job or income
Do not quit, do not switch companies, and do not go from a salaried job to self-employed while you are closing. Lenders check your employment right before funding, sometimes the morning of. I once had a buyer two weeks from the keys finally walk away from a job that was making them miserable. The lender panicked, we panicked, and we only got through because the other partner's income was enough to carry the loan on its own. Not everyone has that cushion. If your job situation is about to change, tell your agent and your loan officer before you do anything.
2. Do not make big purchases
That new couch for the new living room can wait. So can the car. A large purchase before closing moves your credit and your debt-to-income ratio, and that can change the loan you were already approved on. Furniture, appliances, a car, all of it waits until after you have the keys. Put the wallet away for a few weeks.
3. Do not open or run up credit
Do not open a new credit card during your mortgage, not even the one at the register that saves you ten percent today. A new card is a hard inquiry plus a fresh line of debt, and both can move the numbers your approval was built on. The same goes for running up the cards you already have or missing a payment. Lenders like to see steady, consistent usage. Keep paying for gas and groceries the way you always do, and skip the big one-off charges.
4. Do not co-sign for anyone
This one is hard, because it usually comes from a good place. A friend or a family member needs a co-signer on a lease or a car loan. If you co-sign while you are buying a house, that debt counts against you even if you never pay a dollar of it, because you are legally on the hook. It raises your debt-to-income ratio and shrinks what you can borrow. Help them after you close, not before.
5. Do not move money around or make large undisclosed deposits
Do not switch bank accounts or restructure your finances in the middle of a loan. The mortgage company has to track your money, and changing accounts makes that harder. And do not drop a large, unexplained deposit into your account. Every big deposit gets a question: where did this come from? The lender has to confirm the money was not borrowed or obtained some way they cannot verify. If someone is gifting you money toward the purchase, we document it with a gift letter and source it from their account, and it is far easier if that happens well before you start the loan rather than in the middle of it.
6. Do not touch your closing funds
The cash you have set aside for closing costs and your down payment needs to sit still. When the lender asks for it, they usually want it wired the same day. If you have moved it around, spent part of it, or parked it somewhere new, you slow down the paperwork, and slow paperwork can push your closing date. Keep that money in one place and do not touch it, not even a little, until we are done.
7. Do not sit on your paperwork
When your lender asks for a document, send it as fast as you can. Here is the part that frustrates every buyer: they will ask for the same thing two or three times. It is not that they lost it. They are confirming that the information you send stays consistent. The timeline depends as much on you as on them, because you are the one providing what they need when they need it. Every day you sit on a request is a day your closing waits.
What to do instead: your closing-week playbook
Keep it boring and keep us in the loop. Hold your job and your income steady. Put off every big purchase and every new line of credit until after closing. Leave your bank accounts and your closing funds exactly where they are. Document any gift money early, with a letter. And when the lender asks for something, send it the same day. If a change is unavoidable, a job offer you cannot pass up or a family situation, call your agent and your loan officer first, so we can plan around it instead of reacting to it.
Frequently asked questions
Can I buy a car before closing on a house?
Wait until after you close. A car loan adds monthly debt that raises your debt-to-income ratio and can change or cancel your mortgage approval, even if the car payment feels small next to the house.
Does the lender really re-check my employment?
Yes. Lenders verify employment right before the loan funds, and sometimes again after closing. A job change, a resignation, or a switch to self-employment during this window can put the loan at risk.
How do I document a gift for my down payment?
With a gift letter, and by sourcing the money from the giver's bank account so the lender can confirm where it came from. Do this as early as you can, ideally before the loan process starts, not in the middle of it.
I already did one of these. What now?
Call your agent and your loan officer right away. Some of these are fixable if we catch them early. The worst move is to hope the lender does not notice, because they will.
Watch the full breakdown
I walk through all seven of these in a short video: How to Not Lose Your Mortgage Approval. And if you want to see what your monthly payment actually looks like in North Jersey, taxes and insurance included, run the numbers on our mortgage payment calculator.
Buying or selling in North Jersey and want someone in your corner from offer to close? Call or text Nancy at 917.992.3098.
This article is general education, not lending, legal, or tax advice. Always confirm your specific situation with your loan officer.
Nancy Chu, Nancy Chu Homes, Keller Williams NJ Metro Group. NJ License 0568990. Serving Montclair and North Jersey across Essex, Hudson, Bergen, Morris, and Union Counties.
