PreparingYourCreditforaMortgage

Getting a mortgage is one of the few times your credit really earns its keep. Lenders look at it closely, pull it from all three bureaus, and use score versions you have probably never seen. The good news is that the preparation is straightforward: fix what you can, protect what you have, and shop smartly so the process itself does as little damage as possible.

Which scores mortgage lenders actually use

Here is the part that surprises most people: the score in your banking app is almost certainly not the score a mortgage lender will pull.

Mortgage lenders typically use older FICO versions: FICO Score 2 (from Experian), FICO Score 4 (from TransUnion), and FICO Score 5 (from Equifax) ³ . They pull a full tri-merge report from all three bureaus, then typically use the middle of the three scores. If two people are applying together, lenders commonly use the lower middle score of the two borrowers ³ .

This matters because different FICO versions can produce different numbers from the same underlying file. The FICO Score 8 that most free apps and credit cards show you is not what a mortgage underwriter sees. We cover why in the FICO vs. VantageScore guide.

The practical takeaway: don’t assume the score you see is the score a lender will use. The factors that drive those older versions are the same fundamentals (payment history, balances, age of accounts), so improving your file improves every version. But be prepared for the number at application to look different from your app’s figure.

Check your reports for errors before you apply

Before doing anything else, pull your credit reports from all three bureaus at AnnualCreditReport.com. That is the federally mandated free source ¹ . Read each one carefully.

Errors are more common than people expect. An account reported as late when you paid on time, a balance that has not been updated after you paid it off, a debt that belongs to someone else: any of these can drag down the bureau score a lender picks up. Disputing an error before you apply is far easier than trying to correct it while a loan is in underwriting. See the dispute errors guide for how to file a dispute with each bureau.

45 days is the rate-shopping window: get quotes from multiple mortgage lenders within that window and all the inquiries roll into one on your credit score.

The two levers that matter most

Not all credit factors are equal, and they never matter more than they do before a mortgage application. FICO’s published breakdown is direct: payment history makes up 35% of the score and amounts owed makes up 30% ⁴ . Together, those two factors account for nearly two-thirds of the number a mortgage lender will see.

Payment history is the most important factor by far. Even a single late payment from relatively recently can weigh on the older FICO versions mortgage lenders use. The best preparation here is time: keep paying every account on time, every month, well before you apply.

Amounts owed (primarily your revolving utilization, meaning how much of your credit card limits you are carrying as balances) is the lever you can actually move quickly. Paying down cards in the months before you apply directly lowers this factor. You do not need to hit zero; the goal is to show lenders that you are not stretched thin. See the credit utilization guide for how the math works and how lenders read it.

A mortgage lender is not just reading a number. They are reading your file to judge how you manage debt. The biggest part of that judgment comes down to whether you pay on time and how much of your available credit you are using.

Your score is necessary, but not sufficient

A strong score gets you in the door, but it doesn’t get you the loan by itself. Underwriters weigh several things alongside it:

• Debt-to-income ratio (DTI). This is all your monthly debt payments divided by your gross monthly income ⁶ . If your monthly debts are $2,000 and your gross income is $6,000, your DTI is 33% ⁶ . Lenders use it to judge whether you can actually carry the payment. Limits vary by loan type and lender ⁶ , but a DTI at or below 43% has long been the benchmark for a Qualified Mortgage ⁷ . Paying down debt before you apply lowers both your utilization and your DTI.
• Income and employment stability. Lenders are generally required to verify the source of your income ⁸ . Steady, documented income is the foundation, and because the lender is verifying it, a job change in the middle of the process can complicate that verification. If a change is unavoidable, tell your loan officer early rather than letting it surface at underwriting.
• Down payment and assets. Lenders also verify the source of your down-payment funds ⁸ , so the money needs to be documented, not just sitting in the account.

A simple timeline

You don’t need a perfect file. You need a clean, stable one by the time you apply. A rough sequence:

• Six or more months out: pull all three reports and dispute any errors; keep every account current; start paying down card balances.
• One to three months out: stop opening new credit, keep balances low, and gather your documents, namely pay stubs, tax returns, and bank statements.
• Application through closing: change nothing you don’t have to. That means no new credit, no large undocumented deposits, no avoidable job disruption. Keep your credit and finances stable until the keys are in your hand.

The classic mistake: opening new credit before closing

This is the error that derails real applications. Many buyers, excited about furnishing a home or tempted by a promotional offer, open a new credit card or take out a car loan during the mortgage process. The CFPB is explicit: try to avoid applying for any new credit (a card, a car loan, or any other loan) right before or during the mortgage process ¹ . Each new application is an additional hard inquiry that can lower your score.

A single inquiry, on its own, is not catastrophic: hard inquiries stay on your report for up to two years, but FICO typically only weighs them for about 12 months, and a single inquiry usually moves a score by less than five points ⁵ . The problem before a mortgage is not any one inquiry: it is adding unnecessary ones when the timing is most sensitive, or signaling that you are taking on more debt right before a major loan.

The clean approach is to lock your credit behavior in the months before and during the application: pay everything on time, pay down balances, dispute any errors, and do not open anything new until you are past closing.