Home Buying Guide

Understanding Credit Scores: Your Key to Better Mortgage Rates

Hommie Team·
6 min read·
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Your credit score is one of the most important numbers in your financial life, especially when it comes to buying a home. It can mean the difference between getting approved for a mortgage and being denied, or between paying thousands more or less in interest over the life of your loan.

What Is a Credit Score?

A credit score is a three-digit number that represents your creditworthiness—essentially, how likely you are to repay borrowed money. The most commonly used credit scoring model is the FICO score, which ranges from 300 to 850.

Credit Score Ranges

Understanding where your score falls can help you know what to expect:

  • Excellent (800-850): You'll qualify for the best rates and terms
  • Very Good (740-799): You'll get favorable rates and terms
  • Good (670-739): You'll get reasonable rates, though not the best
  • Fair (580-669): You may qualify but with higher rates and stricter terms
  • Poor (300-579): You'll have difficulty qualifying for traditional mortgages

How Credit Scores Are Calculated

Your FICO score is calculated using five main factors, each weighted differently:

Payment History (35%)

This is the most important factor in your credit score. It looks at whether you've paid your bills on time, including:

  • Credit cards
  • Retail accounts
  • Installment loans
  • Mortgage payments
  • Public records like bankruptcies or tax liens

Even one late payment can negatively impact your score, and the more recent the late payment, the more it hurts.

Credit Utilization (30%)

This measures how much of your available credit you're using. For example, if you have a credit card with a $1,000 limit and a $300 balance, your utilization rate is 30%.

Best Practice: Keep your utilization below 30% on each card and overall. For the best scores, aim for under 10%.

Length of Credit History (15%)

This considers how long you've had credit accounts open. A longer credit history generally helps your score because it provides more data about your payment patterns.

Tip: Keep old credit cards open, even if you don't use them regularly, to maintain a longer average account age.

Credit Mix (10%)

Having different types of credit accounts—credit cards, auto loans, mortgages—can positively impact your score. It shows you can manage various types of credit responsibly.

New Credit (10%)

Opening several new credit accounts in a short period can lower your score. Each application for new credit results in a "hard inquiry" that can temporarily decrease your score by a few points.

Why Credit Scores Matter for Mortgages

Mortgage lenders use your credit score to assess risk and determine:

  • Whether you qualify for a loan
  • What interest rate you'll receive
  • What loan programs are available to you
  • How much you can borrow

The Cost of a Lower Credit Score

The difference in interest rates between excellent and fair credit can be substantial. For example, on a $300,000 30-year mortgage:

  • 760+ credit score: 6.5% rate = $1,896/month
  • 680 credit score: 7.0% rate = $1,996/month
  • 620 credit score: 7.8% rate = $2,161/month

Over the life of the loan, the borrower with a 620 credit score would pay about $95,000 more in interest than someone with a 760+ score.

How to Improve Your Credit Score

The good news is that credit scores can be improved with time and effort. Here are the most effective strategies:

Pay All Bills on Time

Since payment history is the most important factor, make sure you never miss a payment. Set up automatic payments or calendar reminders to help you stay on track.

Reduce Credit Card Balances

Focus on paying down existing balances to lower your utilization ratio. Consider these strategies:

  • Pay more than the minimum payment
  • Make multiple payments per month
  • Pay before the statement closing date to lower reported balances

Don't Close Old Credit Cards

Closing old accounts can hurt your score by reducing your available credit and shortening your credit history. Instead, keep them open and use them occasionally for small purchases.

Limit New Credit Applications

Only apply for new credit when necessary. If you're shopping for a mortgage, do it within a focused timeframe (typically 14-45 days) so multiple inquiries count as one.

Monitor Your Credit Report

Check your credit reports regularly for errors and dispute any inaccuracies. You're entitled to one free credit report per year from each bureau at annualcreditreport.com.

Common Credit Score Myths

Myth 1: Checking Your Credit Hurts Your Score

Checking your own credit score is a "soft inquiry" and doesn't affect your score. You should monitor your credit regularly.

Myth 2: You Need Perfect Credit to Buy a Home

While excellent credit gets you the best rates, many loan programs accept lower scores. FHA loans, for example, may accept scores as low as 580 with a 3.5% down payment.

Myth 3: Paying Off All Debt Will Maximize Your Score

While paying off debt is generally good, closing all credit accounts can actually hurt your score by eliminating your credit history and available credit.

Myth 4: Credit Repair Companies Can Fix Everything

Legitimate credit repair companies can help dispute errors, but they can't remove accurate negative information from your report. You can dispute errors yourself for free.

Timeline for Credit Improvement

Improving your credit score takes time, but you can see progress relatively quickly:

  • 1-2 months: Paying down balances can improve utilization ratios
  • 3-6 months: Consistent on-time payments start to have a positive impact
  • 6-12 months: Significant improvements possible with consistent good habits
  • 2+ years: Major negative items (like late payments) have less impact

Special Considerations for First-Time Homebuyers

If you're new to credit or have a limited credit history, consider these options:

Become an Authorized User

Ask a family member with good credit to add you as an authorized user on their account. Their positive payment history can help build your credit.

Consider Alternative Credit Data

Some lenders now consider alternative data like rent payments, utility bills, and bank account history when evaluating creditworthiness.

Look into First-Time Buyer Programs

Many programs are designed specifically for buyers with less-than-perfect credit, offering more flexible requirements and down payment assistance.

Preparing for Your Mortgage Application

As you prepare to apply for a mortgage:

  1. Check your credit score at least 6-12 months before you plan to buy
  2. Review your credit reports for errors and dispute any inaccuracies
  3. Avoid major financial changes like new credit accounts or job changes
  4. Keep documentation of any credit improvements you've made

The Bottom Line

Your credit score is a powerful tool that can save you thousands of dollars on your mortgage. While improving your score takes time and discipline, the financial benefits make it well worth the effort.

Remember, you don't need perfect credit to buy a home, but the better your score, the more options you'll have and the less you'll pay over time. Start working on your credit early in your homebuying journey, and you'll be rewarded with better rates and terms when you're ready to make an offer.

Ready to see how your credit score affects your mortgage readiness? Hommie tracks your credit progress alongside your savings and helps you understand exactly what you need to qualify for your dream home.

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Written by Hommie Team
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