How to Build and Optimize Your Credit Score

When applying for a home loan, your credit score is one of the first things a lender reviews. It helps determine not only whether you qualify, but also which loan programs are available to you and how favorable your interest rate and pricing will be.

Because of this, understanding your credit — and how to improve it — is an important part of preparing for homeownership.

What Is a Credit Score?

A credit score is a numerical representation of your creditworthiness, typically ranging from 300 to 850. Mortgage lenders most commonly rely on a Classic FICO score, which is calculated using information from all three major credit bureaus.

Credit scores are generally grouped into tiers:

• Excellent: 800–850
• Very Good: 740–799
• Good: 670–739
• Fair: 580–669
• Poor: Below 580

While exact requirements vary by loan program, many conventional loans require a minimum score around 620, with government-backed loans sometimes allowing lower scores depending on the full loan profile.

How Credit Tiers Affect Your Loan

When reviewing an application, lenders don’t look at your score as a single number. Instead, scores fall into credit tiers, and each tier carries different pricing.

Even a small increase in your score can move you into a better tier, which may result in lower interest rates or improved loan terms. This is why managing balances and timing your application carefully can have a meaningful impact.

Also, don’t be surprised if your Classic FICO score is lower than the score you receive on a free credit tracking service or your bank or credit card statement. The Classic FICO score skews lower than other industry scores by sometimes 40-60 points.

Optimizing Credit When You Already Have It

If you have established credit, improving your score is often about making small adjustments rather than major changes:

• Make all payments on time, as payment history is the largest factor in your score.
• Keep credit card balances low, ideally using less than 30% of your available credit.
• Avoid opening or closing accounts unnecessarily, especially before applying for a loan.
• Limit new credit inquiries, as multiple applications in a short period can temporarily lower your score.
• Allow older accounts to remain open and age, which helps strengthen your credit history.
• Review your credit reports periodically to check for errors or inaccuracies.

Tip: Payoff your card at the end of the billing cycle instead of the due date. Bureaus often pull credit at the end of the billing cycle.

Building Credit If You’re Just Getting Started

For borrowers who are young or have little to no credit history, the goal is simply to establish consistent, positive activity:

• A student or starter credit card can be a good first step.
• A secured credit card may be helpful if traditional cards aren’t available.
• Becoming an authorized user on a trusted person’s well-established account can help build history.
• Using credit lightly and paying balances in full each month is often sufficient.
• A co-signed auto loan can help, as long as payments are made on time.
• Be mindful of “buy now, pay later” programs, as many do not contribute to building positive credit history.

Tip: Pay off your card at the end of the billing cycle instead of the due date. Bureaus often pull credit at the end of the billing cycle

Credit is built over time, not overnight. Whether you’re working to optimize an existing score or starting from the beginning, consistent habits: paying on time, keeping balances low, and avoiding unnecessary changes, make the biggest difference.

If buying a home is part of your future plans, understanding your Classic FICO score and how credit tiers work can help you prepare more confidently for the loan process.