What Hurts My Credit Score Most Before Applying for a Mortgage?

The months right before you apply for a mortgage are exactly when your credit score deserves the most protection, not the least.

Quick Answer: A handful of common moves, opening new credit accounts, making large purchases on existing cards, missing payments, and closing old accounts, can all quietly lower your score at the worst possible time. None of these mistakes are complicated to avoid once you know to watch for them.

Opening New Credit Accounts

Applying for a new credit card, financing a car, or opening a store credit line all trigger a hard inquiry and add a new account to your file. Both of those can lower your score, and a new account also shortens the average age of your credit history. Even if you plan to use the new account responsibly, the timing alone can work against you if it happens close to your mortgage application.

Making Large Purchases on Existing Credit

Furnishing a home you have not closed on yet is one of the most common mistakes buyers make. Charging a large purchase to an existing credit card increases your credit utilization, which is a significant factor in your score. Lenders also frequently re-check credit shortly before closing, so a spike in balances between application and closing can create real problems even after you have already been approved.

Missing or Making Late Payments

This one seems obvious, but the stress of buying a home causes people to lose track of due dates more often than you would think. Payment history is the single largest factor in most credit scoring models, so even one missed payment in the months before applying can have an outsized effect. Set up automatic minimum payments during this period if you tend to run tight on bandwidth.

Closing Older Credit Accounts

It feels responsible to close a credit card you no longer use, but doing so can hurt you in two ways. It reduces your total available credit, which raises your utilization ratio even if your balances have not changed, and it can shorten your average account age over time. If you are within a few months of applying, leave old accounts open even if they are inactive.

Co-Signing for Someone Else

Co-signing a loan for a family member or friend adds that debt to your own credit profile and factors into your debt to income ratio, even if you are not the one making the payments. If you are planning to buy a home soon, this is not the time to take on that kind of obligation for someone else.

Letting Balances Sit High Relative to Your Limits

Credit utilization, meaning how much of your available credit you are actually using, matters more than most people realize. Paying down balances before you apply, rather than simply making minimum payments, can meaningfully improve your score in a fairly short window, since utilization updates as soon as your creditor reports the new balance.

What to Do Instead in the Months Before Applying

Keep your accounts as stable as possible. Continue paying everything on time, avoid new credit applications, keep balances low, and hold off on any major purchases until after closing.

Frequently Asked Questions

Q: How far before applying should I stop opening new credit accounts?

A: A good rule of thumb is to avoid new credit for at least several months before you plan to apply, and definitely once you are actively working with a lender.

Q: Does getting quotes from a few different mortgage lenders count against me the same way?

A: No. Mortgage-related inquiries made within a short shopping window are typically treated as a single inquiry by scoring models, which is different from opening unrelated new credit accounts.

Q: Should I close a credit card I never use before applying?

A: Generally no, especially close to your application. Closing an account can raise your utilization ratio and shorten your credit history, both of which can lower your score.

Q: What if I already have a large purchase planned, like a car?

A: Talk to your lender before making the purchase. Timing it after closing, or restructuring the plan, is often better than making a large purchase mid process.

Q: Can one missed payment really affect my mortgage approval?

A: Yes, particularly if it happens close to your application. Payment history carries significant weight in most scoring models, so even a single late payment can matter.

Closing Call to Action

If you know you’ll be applying for a mortgage in the next several months, let’s talk now rather than after something on this list has already happened. I would rather help you protect your credit ahead of time than help you recover from a surprise later.