Using a credit card before closing on a house is not automatically a problem, but it can become one fast. Small, routine charges on a card you already have are usually safe. A large purchase, a maxed-out balance, or a brand-new account opened during this window is one of the most common ways buyers derail a mortgage that was already approved. The reason is simple: your lender is going to look at your credit again right before funding, and anything that raises your monthly obligations or lowers your score is fair game to reopen the file.
The Final Credit Check Before Closing
Your lender will pull an updated credit report or credit supplement before funding the loan, even after underwriting has issued a clear-to-close. This refresh typically happens a few days to a couple of weeks before your closing date. Some lenders run it the morning of closing itself.
Fannie Mae requires lenders to identify undisclosed liabilities through its Desktop Underwriter system. Under a policy effective November 15, 2025, lenders who discover new non-mortgage debts during origination must recalculate the borrower’s debt-to-income ratio and resubmit the file through underwriting before the loan can close.1Fannie Mae. Undisclosed Liabilities A single new credit card balance can trigger a full re-review.
Credit card issuers generally report account balances to the bureaus once per billing cycle, usually around the statement closing date. Because reporting dates vary by issuer, a charge you made weeks ago might not appear until right before closing, and a charge you made yesterday might show up sooner than you expect. You cannot reliably time your way around it.
How a New Balance Changes Your Debt-to-Income Ratio
Your debt-to-income ratio compares your gross monthly income to your total recurring monthly debt payments, including the projected mortgage payment, taxes, insurance, and every existing loan and credit card obligation. Lenders use it as the core measure of whether you can carry the new mortgage on top of what you already owe.
Fannie Mae caps the ratio at 50 percent for loans processed through its automated Desktop Underwriter system, and at 45 percent for manually underwritten loans with compensating factors (36 percent without them).2Fannie Mae. Debt-to-Income Ratios If you were already near the limit at application, a modest new balance can put you over.
Fannie Mae’s guidelines treat revolving credit card balances as part of a borrower’s recurring monthly obligations. When the credit report does not show a required minimum payment, the lender must use 5 percent of the outstanding balance as the assumed monthly payment.3Fannie Mae. Monthly Debt Obligations A $5,000 furniture charge adds roughly $250 per month to your debt load under that formula. That may be enough to disqualify you from the loan amount you need.
What you bought does not matter. Groceries, gas, appliances, and electronics are all treated identically: the lender looks at the balance and the minimum payment, not the purpose.
How a New Balance Can Drop Your Credit Score
Credit utilization, the percentage of your available credit you are currently using, makes up roughly 30 percent of a standard FICO score.4myFICO. What Should My Credit Utilization Ratio Be? Running up a balance before closing reduces your available credit and can cause an immediate score drop, even if you plan to pay the card off next month.
Score minimums vary by loan program: Fannie Mae requires a minimum of 620 for fixed-rate conventional loans and 640 for adjustable-rate mortgages, and FHA loans allow scores as low as 580 for maximum financing with a 3.5 percent down payment.5Fannie Mae. General Requirements for Credit Scores A drop of 10 or 20 points can push you below one of these thresholds entirely.
Even a score that stays above the minimum can cost you money. Fannie Mae applies loan-level price adjustments based on credit score, so a lower number at the final pull can mean a higher interest rate or additional upfront fees than what you were originally quoted.5Fannie Mae. General Requirements for Credit Scores Over 30 years, even a small rate increase compounds into thousands in extra interest.
What Happens If the Lender Finds New Debt
When new credit activity shows up after a clear-to-close, the outcome depends on how much it changes your file. The range runs from an inconvenient delay to a canceled loan.
- Re-underwriting. The lender must recalculate your DTI with the new obligation and resubmit the file. This can take days and pushes your closing date back.1Fannie Mae. Undisclosed Liabilities
- Rate lock expiration. Most rate locks last 30 to 60 days. If re-underwriting drags past the lock, you may pay for an extension or accept the current market rate, which could be higher.
- Loan repricing. A lower score or higher DTI can worsen your pricing even if you still qualify. Same loan, worse rate.
- Outright denial. If the new debt pushes DTI above the cap or drops your score below the program minimum, the lender denies the loan and the transaction collapses.
Your Earnest Money May Be at Risk
Most purchase contracts include a financing contingency that protects you if the mortgage falls through for reasons beyond your control. If your loan is denied because you took on new debt during closing, the seller can argue the denial was your fault rather than a good-faith failure to obtain financing. In that scenario you could forfeit your earnest money deposit, often 1 to 3 percent of the purchase price, and you may face a breach-of-contract claim if the seller lost time or another buyer.
Opening a New Card Is Worse Than Using an Existing One
The two are not equal risks. A charge on an existing card raises your balance and utilization. Opening a new card does that and more: the application generates a hard inquiry, and the new account shortens your average credit age and appears as a brand-new tradeline. All of those show up on a final credit check.
A hard inquiry alone rarely kills a mortgage. Combined with a new account and a balance on it, the effect is much larger. Lenders reviewing a new tradeline may require a written explanation and re-underwrite the file from scratch. The safe rule is to apply for no new credit of any kind, including cards, auto loans, personal loans, or store financing, from the day you submit your mortgage application until the loan is funded.
If You Already Charged Something
Pay off the balance if you can. Fannie Mae’s guidelines state that if a revolving account balance is paid off at or before closing, the monthly payment on that balance does not need to be included in the borrower’s DTI ratio.6Fannie Mae. Debts Paid Off At or Prior to Closing You do not have to close the account. Just bring the balance to zero and provide proof.
Timing matters. If you pay off the card after the statement closes but before the next reporting cycle, your credit report may still show the old balance when the lender pulls it. The cleanest approach is to pay before the statement closing date, so a zero or low balance is what gets reported. If that window has already passed, ask your card issuer for a letter confirming the current zero balance and send it directly to your loan officer.
Don’t drain your reserves to do it. Your lender verified you have enough for the down payment, closing costs, and any required reserves. Emptying your savings to pay off a card can create a different underwriting problem: insufficient assets to close.
Tell your loan officer either way. If you already made a large purchase or opened a new account, disclose it before the final credit pull catches it. Being upfront gives the underwriter time to work with you. Expect to write a brief letter of explanation covering what happened, why, and what you have done about it (a payoff confirmation helps). A clear explanation paired with proof of resolution often lets the file move forward.
If paying off is not possible, the underwriter will rerun your DTI and score with the new debt included. Sometimes the numbers still work, particularly if you had a comfortable cushion. If they don’t, your options narrow to a smaller loan amount, a different loan program, or a delayed closing while you pay the debt down.
When You Can Use Your Cards Freely Again
The restriction lifts once the loan is funded, meaning the lender has actually disbursed the money, not just when you sign the closing documents. Funding usually happens the same day as closing or within one to two business days after. Once the loan is funded, the lender has no reason to pull your credit again, and new purchases will not affect the terms you locked in.
If you have been holding off on furniture, appliances, or other items for the new house, waiting the extra few days for confirmation that the loan has funded is worth it. After that, budget for the new mortgage payment before you load up on additional spending.