Credit Score Basics

Your credit score is a three-digit number, typically ranging from 300 to 850, that summarizes your creditworthiness based on your borrowing history. Mortgage lenders rely heavily on this score to assess the risk of lending to you. A higher score signals responsible credit management and translates directly into a lower interest rate, which can save you tens of thousands of dollars over the life of your loan.

The most widely used credit scoring model in mortgage lending is the FICO score. While there are multiple FICO versions, most mortgage lenders currently use FICO Score 2 (Experian), FICO Score 5 (Equifax), and FICO Score 4 (TransUnion). The FHFA has announced a transition to FICO 10T and VantageScore 4.0 for loans sold to Fannie Mae and Freddie Mac, so the specific models used may change in the near future. When you apply for a mortgage, your lender will pull all three scores and typically use the middle score for qualification purposes. If you are applying with a co-borrower, the lender uses the lower of the two middle scores.

Five factors determine your FICO score:

• Payment history (35%): Whether you have paid past credit accounts on time. This is the single most important factor. Even one 30-day late payment can drop your score by 50 to 100 points.
• Amounts owed (30%): How much of your available credit you are currently using, known as your credit utilization ratio. Keeping utilization below 30% is good; below 10% is excellent.
• Length of credit history (15%): How long your credit accounts have been open. A longer history gives lenders more data and generally helps your score.
• Credit mix (10%): The variety of credit types you manage, such as credit cards, auto loans, student loans, and mortgages. A healthy mix shows you can handle different types of debt.
• New credit (10%): How many new accounts you have opened recently and how many hard inquiries appear on your report. Multiple new accounts in a short period can lower your score.

Understanding these factors is the first step toward improving your score before you apply for a mortgage. For a broader look at what determines the rate you are offered, see our guide on how mortgage rates are determined.

Score Tiers and Typical Rate Differences

Lenders group credit scores into tiers, and each tier corresponds to a different interest rate. The exact rates change daily based on market conditions, but the relative differences between tiers remain fairly consistent. Below is a representative example of how FICO score ranges typically map to 30-year fixed mortgage rates:

• 760 and above: Approximately 6.50%. This is the best rate tier. Borrowers in this range qualify for the lowest available rates and the most favorable loan terms.
• 700 to 759: Approximately 6.75%. A strong score that still earns competitive rates, though slightly above the top tier.
• 660 to 699: Approximately 7.00%. Rates begin to climb noticeably at this level. This is considered a fair credit range for mortgage purposes.
• 620 to 659: Approximately 7.50%. Borrowers in this tier pay meaningfully higher rates and may face stricter underwriting requirements, such as larger down payments or additional documentation.
• Below 620: Conventional loan qualification becomes difficult. Borrowers in this range may need to explore government-backed loan options like FHA loans, which have more lenient credit requirements.

To put these differences in perspective, consider a $350,000 mortgage over 30 years. A borrower with a 760 score at 6.50% would pay approximately $2,212 per month in principal and interest. A borrower with a 620 score at 7.50% would pay approximately $2,447 per month. That is a difference of about $235 per month, or roughly $84,600 over the full life of the loan. Use our mortgage calculator to run the numbers for your own situation.

It is worth noting that these rate differences also affect how much home you can afford. A higher rate means a larger portion of each payment goes toward interest, which reduces the loan amount you can qualify for at a given monthly budget.

Minimum Scores by Loan Type

Different loan programs have different minimum credit score requirements. Understanding these thresholds helps you determine which programs you qualify for and whether it makes sense to improve your score before applying.

• Conventional loans: Minimum FICO score of 620. Conventional loans are not backed by the government and are sold to Fannie Mae or Freddie Mac. While 620 is the floor, borrowers below 740 will typically pay higher rates and may be required to carry private mortgage insurance (PMI) if their down payment is less than 20%.
• FHA loans: Minimum FICO score of 580 with a 3.5% down payment, or 500 with a 10% down payment. FHA loans are insured by the Federal Housing Administration and are designed for borrowers who may not meet conventional loan requirements. They are a popular choice for first-time homebuyers with limited savings or lower credit scores. For a detailed comparison, see our guide on FHA vs. conventional loans.
• VA loans: No official minimum credit score set by the Department of Veterans Affairs. However, most VA-approved lenders require a score of at least 620. VA loans are available to eligible veterans, active-duty service members, and surviving spouses, and they offer the significant advantage of no down payment and no mortgage insurance.
• USDA loans: Typically require a minimum FICO score of 640. USDA loans are guaranteed by the U.S. Department of Agriculture and are available for properties in eligible rural and suburban areas. They also require no down payment but have income limits based on your county.

Keep in mind that meeting the minimum score does not guarantee approval. Lenders consider your full financial picture, including income, employment history, debt-to-income ratio, and available assets. A higher score strengthens your overall application and gives you more negotiating power.

How to Improve Your Score Before Applying

If your credit score is not where you want it to be, the good news is that meaningful improvement is possible in three to six months with disciplined effort. Here are the most effective strategies, ordered by potential impact:

• Pay down credit card balances: Reducing your credit utilization ratio is one of the fastest ways to boost your score. Aim to get each card below 30% utilization, and ideally below 10%. If you carry $5,000 in balances on cards with a $10,000 total limit, paying down to $1,000 could raise your score by 20 to 50 points.
• Make every payment on time: Set up autopay for at least the minimum payment on all accounts. A single missed payment can do significant damage, and the effect lingers on your report for up to seven years.
• Check your credit reports for errors: Request your free annual reports from AnnualCreditReport.com and review them carefully. Dispute any inaccurate late payments, incorrect balances, or accounts that do not belong to you. Correcting errors can produce immediate score improvements.
• Avoid opening new accounts: Each new credit application triggers a hard inquiry, which can lower your score by a few points. More importantly, a new account reduces the average age of your credit history. Hold off on new credit cards, auto loans, or personal loans in the months leading up to your mortgage application.
• Keep old accounts open: Even if you no longer use a credit card, keeping it open helps your credit utilization ratio and your average account age. Closing an old card reduces your total available credit, which can increase your utilization percentage.
• Become an authorized user: If a family member has a credit card with a long, positive payment history and low utilization, ask to be added as an authorized user. Their account history may appear on your credit report and help boost your score.
• Pay off collection accounts if possible: While paying a collection account will not remove it from your report, newer FICO scoring models give less weight to paid collections. Some lenders also view paid collections more favorably during manual underwriting review.

Start these efforts at least three to six months before you plan to get pre-approved. Significant score changes take time to reflect on your credit reports, and you want your improved score to be the one your lender sees.

What Hurts Your Score During the Mortgage Process

Once you begin the mortgage application process, your credit behavior is under heightened scrutiny. Lenders may pull your credit again just before closing, and any negative changes could jeopardize your approval or lead to less favorable terms. Here are the most common mistakes to avoid:

• Opening new credit accounts: Do not apply for new credit cards, auto loans, or furniture financing between pre-approval and closing. New accounts and hard inquiries lower your score, and additional debt changes your debt-to-income ratio, which can cause your lender to rescind the approval.
• Making large purchases on credit: Even if you do not open a new account, charging a large purchase to an existing card increases your utilization and can drop your score. Wait until after closing to buy appliances, furniture, or other big-ticket items.
• Missing any payments: A missed payment during the mortgage process is especially damaging because it raises a red flag with underwriters at the worst possible time. Automate all your payments to eliminate this risk.
• Closing credit card accounts: Closing a card reduces your total available credit, which increases your utilization ratio. Even if a card has an annual fee you want to avoid, wait until after your mortgage closes.
• Co-signing for someone else: Co-signing a loan makes you legally responsible for that debt. It appears on your credit report and adds to your debt obligations, which can affect your qualification.
• Making large, unexplained deposits: While this does not directly affect your credit score, lenders will question large deposits that appear during underwriting. They need to verify that your funds are not borrowed money, which can delay or complicate closing.

The general rule during the mortgage process is simple: maintain the financial status quo. Do not take on new debt, do not close accounts, and do not make any major financial moves until after you have the keys to your new home.

Key Takeaways

• Your credit score is one of the most influential factors in the mortgage rate you receive. A score of 760 or above qualifies for the best rates, while each tier below adds roughly 0.25% to 0.50% to your rate.
• The five FICO factors are payment history (35%), amounts owed (30%), length of credit history (15%), credit mix (10%), and new credit (10%). Focusing on the first two delivers the biggest improvements.
• Minimum score requirements vary by loan type: 620 for conventional, 580 for FHA with 3.5% down (500 with 10% down), typically 620 for VA, and typically 640 for USDA.
• Start improving your score three to six months before applying. Paying down balances, correcting report errors, and avoiding new credit inquiries are the most effective strategies.
• Protect your score during the mortgage process by avoiding new debt, large credit purchases, and closing accounts between pre-approval and closing.
• Even a 40-point score improvement can save you $200 or more per month, adding up to over $70,000 across a 30-year loan. The effort is well worth it.

Frequently Asked Questions

Does checking my own credit score hurt it?

No. Checking your own credit score or pulling your own credit report is considered a soft inquiry and has no effect on your score. You can check as often as you like without any impact. Hard inquiries, which do affect your score, only occur when a lender or creditor pulls your report as part of a credit application. It is a good practice to monitor your score regularly, especially in the months leading up to a mortgage application, so you can track your progress and catch any issues early.

Will multiple mortgage applications hurt my score?

The credit scoring models recognize that comparison shopping for a mortgage is responsible behavior. If multiple mortgage lenders pull your credit within a 14- to 45-day window (depending on the FICO version), all of those inquiries are treated as a single inquiry for scoring purposes. This means you can and should get quotes from multiple lenders without worrying about damage to your score. Just make sure to complete your rate shopping within that window. Learn more about the process in our pre-approval vs. pre-qualification guide.

How long does it take to rebuild a credit score?

The timeline depends on what caused the score drop. If the issue is high credit card utilization, paying down balances can improve your score within one to two billing cycles, often within 30 to 60 days. If the problem is a missed payment, the negative impact diminishes over time but the mark stays on your report for seven years. A bankruptcy can remain for seven to ten years. That said, you do not need to wait years to see improvement. Consistent positive behavior — on-time payments, low utilization, and no new delinquencies — will steadily raise your score even while older negative items are still on your report.

What credit score do I need to get the best mortgage rate?

Most lenders reserve their best rates for borrowers with FICO scores of 760 or higher. However, the definition of "best" changes with market conditions. In a given rate environment, the difference between a 760 score and an 800 score is typically negligible — both fall into the top tier. The meaningful rate jumps happen at the tier boundaries: dropping from 760 to 739, from 700 to 659, or from 660 to 619. If your score is close to one of these boundaries, even a small improvement of 10 to 20 points could move you into a better tier and save you meaningfully over the life of the loan. Use our mortgage calculator to see exactly how different rates affect your monthly payment.