Your credit score is one of the biggest factors lenders use to determine both whether you qualify for a mortgage and what interest rate you’ll be offered. Even a modest improvement in your score in the months before applying can translate into meaningfully lower monthly payments and thousands of dollars in interest savings over the life of the loan.
Lenders use your credit score to gauge risk. A higher score signals a stronger history of managing debt responsibly, which typically qualifies you for lower interest rates. The difference between a “good” and “excellent” credit score can shift your rate by a noticeable margin — often enough to change your monthly payment by $100 or more on an average-sized loan.
| Credit Score Range | General Rate Impact |
|---|---|
| 760+ | Best available rates |
| 700-759 | Competitive rates, small premium |
| 660-699 | Noticeably higher rate |
| 620-659 | Significantly higher rate; limited loan options |
| Below 620 | May require FHA or other specialized loan programs |
Before doing anything else, pull your credit reports from all three major bureaus and review them carefully. Errors — like accounts that aren’t yours, incorrect late payments, or outdated balances — are more common than most people expect, and disputing and correcting them can produce a quick score improvement.
Your credit utilization ratio — the percentage of your available credit you’re currently using — is one of the most influential factors in your score. Paying down credit card balances, ideally to below 30% of your limit (and even lower if possible), can produce a meaningful score increase, often within one to two billing cycles.
In the months leading up to a mortgage application, avoid opening new credit cards, auto loans, or other financing — each application creates a hard inquiry and can lower your average account age, both of which can temporarily dent your score. Similarly, avoid closing old credit cards, since this can reduce your overall available credit and shorten your credit history.
Payment history is typically the single largest factor in your credit score. Set up autopay or reminders for every bill — not just loans, but utilities and other accounts that may report to credit bureaus — to avoid any late payments in the months before applying.
Co-signing a loan for someone else adds that debt to your own credit profile and debt-to-income calculations, even if you’re not the one making payments. Avoid taking on this kind of obligation while preparing to apply for a mortgage.
The length of your credit history contributes to your overall score. If you have older credit cards with no annual fee, consider keeping them open and using them occasionally (paying the balance in full) rather than closing them, even if you don’t rely on them heavily.
Lenders like to see that you can responsibly manage different types of credit — revolving accounts like credit cards, and installment loans like auto loans or student loans. This shouldn’t be a reason to take on unnecessary debt, but if you already have a mix, it can support a stronger score.
Some changes — like correcting a credit report error or paying down a large credit card balance — can show results within 30-45 days, in time for your next reporting cycle. Others, like building a longer payment history or letting a hard inquiry age out, take months to a couple of years to fully play out. If you’re planning to buy in the next 3-6 months, focus on the fastest-acting steps: paying down balances, correcting errors, and ensuring on-time payments.
Once you have a clearer sense of your likely credit tier, see how it might affect your budget using our Affordability Calculator, which factors in your income, debts, and down payment to estimate what home price fits your situation.
If your timeline doesn’t allow for months of credit-building, talk to a lender about loan programs designed for a range of credit profiles, such as FHA loans, which can accept lower scores than many conventional loan programs, often with a larger down payment or slightly different terms.
Improving your credit score before buying a home isn’t about chasing a “perfect” number — it’s about moving into the best tier available to you within your timeline. Even modest, consistent improvements in the months before applying can meaningfully change the interest rate you’re offered, which compounds into real savings over the life of your loan.