02 What you need to know
How new credit can affect your mortgage approval
New debt changes your DTI
DTI, or debt-to-income ratio, is your total monthly debt payments (including the new mortgage) divided by your gross monthly income. Most loan programs have a maximum.
For credit cards and other revolving accounts, lenders generally count the minimum monthly payment on your credit report. A new card with a balance adds a payment to your DTI.
Inquiries and new accounts can move your score
A hard inquiry happens when a creditor pulls your credit to approve an application. Hard inquiries and new accounts can lower your score, and your rate or eligibility may depend on that score. Lenders may also ask you to explain recent inquiries in writing.
Lenders often check again before funding
Many lenders monitor your credit during escrow or run a fresh credit check shortly before funding. If new debt shows up before closing, Fannie Mae guidelines require the lender to account for it, which can mean re-qualifying you.
Common ways buyers get caught
- Financing furniture, appliances or electronics. A “0% for 12 months” offer can still show a payment or be counted.
- Buying or leasing a car.
- Co-signing for someone else. That debt usually counts as yours.
- Closing old cards without asking. It can affect your score.
- Missing a payment on anything.
03 Real-world example
Example: a car payment added during escrow
Say you earn $15,000 a month and your approval was based on a 43% DTI. During escrow, you buy a car with a $650 monthly payment.
| Before the car | After the car | |
|---|---|---|
| Gross monthly income | $15,000 | $15,000 |
| Total monthly debts | $6,450 | $7,100 |
| DTI | 43.00% | 47.33% |
Assumptions: illustrative only. Total debts include the proposed mortgage payment. Hypothetical 45% maximum DTI for this example; actual limits vary by program and approval.
If your program caps DTI at 45%, your total debts can’t exceed $6,750. At $7,100, you’re over the limit, and the loan may need to be restructured or may not close as approved.
Assumptions: $650 per month of principal and interest on a 30-year fixed mortgage at a hypothetical 7% rate supports about $97,700 of loan. Illustrative only, not a current rate.
Put another way, that car payment uses up the same room as nearly $100,000 of mortgage.
04 What most people overlook
What borrowers overlook during escrow
- Pre-approval isn’t the finish line. Your finances can be checked again right up to funding. See why pre-approvals expire.
- “Just checking” can still be a hard pull. Applying for store cards at checkout counts.
- Paying off debt isn’t always helpful either. Using savings to pay something off can reduce your cash to close or reserves. Ask first.
- Your housemate’s or relative’s car loan matters if you co-signed it.
From application to funding: no new credit, no closed accounts, no missed payments, and no big purchases without a call to your lender first.
05 How I’d approach it
How I’d protect your approval before closing
The furniture can wait two weeks. Your loan approval can’t be rebuilt that fast.
When I pre-approve you, I tell you upfront what to avoid during escrow, and I ask about any planned purchases, like a car lease ending soon.
If something is unavoidable, I want to know before it happens. Then I can rerun your DTI in the affordability calculator and tell you whether it fits.
If an inquiry or new account does appear, I get ahead of it with a written explanation and updated statements, so it doesn’t surprise the underwriter days before closing.