Your credit score is one of the biggest levers on the mortgage rate you get, and most people either fixate on the wrong parts of it or make one move right before applying that quietly undoes months of good standing. The reality is that a better rate is not about chasing a perfect number. It is about knowing what actually drives the score and protecting it in the months before you apply.
What a lower score actually costs you
As of the week of July 9, 2026, Freddie Mac's Primary Mortgage Market Survey put the average 30-year fixed rate at 6.49%. That is the average. Where you land relative to it depends heavily on your credit.
Say your credit puts your rate three-quarters of a percentage point above that average. On a $350,000 loan, that is roughly $175 more a month, more than $2,000 a year, and over $60,000 across a 30-year loan. Same house, same down payment, same loan amount. The only thing that changed is the score. That is why this is worth taking seriously well before you start shopping.
What actually moves your score
Two factors do most of the work: your payment history and how much of your available credit you are using. Almost everything else matters less than people think, which is good news, because it means you can focus.
Keep your balances low
Credit utilization is the share of your available credit you are carrying, and it is one of the fastest levers you have. The common advice is to stay under 30%, but under 10% is better. What most people don't realize is that the balance reported to the bureaus is usually your statement balance, not what is left after you pay. So even if you pay in full every month, a high statement balance can still drag your score. Paying the card down before the statement closes, not just before the due date, can move your number in a single cycle.
Never miss a payment
Payment history is the single biggest factor in your score. One payment that goes 30 days late can knock 50 to 100 points off a strong profile, and it lingers for years. Set autopay for at least the minimum on every account you have. It is the cheapest, highest-return move on this entire list.
Let your accounts age
Length of credit history and a steady mix of accounts help you, but slowly, and mostly by staying out of the way. This is exactly why the timing of new credit matters so much, and it is where I see good buyers trip themselves up.
What to absolutely not do before you apply
This is the part I wish more people heard first. In the months before you apply, and all the way through closing, your job is mostly to leave your credit alone.
Absolutely do not open new credit. A new card or a financed purchase adds a hard inquiry, resets your average account age, and can spike your utilization all at once. Do not close old cards either, even ones you never use, because that erases available credit and makes your utilization look worse overnight.
Be careful with collections. Paying off an old collection feels responsible, but depending on how it is reported it can re-date the account and actually lower your score at the worst possible time. Some loan programs require it and some do not, so ask your loan officer before you touch it rather than acting on your own.
And hold off on big financed purchases. The new car or the furniture package for the house you are about to buy can wait until after you close. Financing them beforehand changes your debt-to-income ratio and your score at the same time, and it is one of the most common reasons an approval falls apart at the last minute. This is putting the cart before the horse in the most expensive way possible.
One more thing. Be skeptical of credit repair companies that promise fast, dramatic jumps for a monthly fee. Most of what they do you can do yourself for free, and the ones making the biggest promises are usually selling the confusion, not fixing it.
A realistic 60 to 90 day plan
So here is the order that actually works. Start by pulling your reports for free at annualcreditreport.com and reading them for genuine errors, then dispute anything that is truly wrong. Pay your balances down before the statements close so a lower number reports to the bureaus. Turn on autopay so a missed payment can't happen by accident. Then, and this is the hard part for most people, stop touching anything and let the next reporting cycle or two catch up.
The biggest mistake is treating your credit as something to fix in the final week before applying. By then the reporting cycle has already locked in against you. Give it 60 to 90 days and you are usually working with a very different number, and a very different rate.
If you want the one-page checklist I give clients before they apply, with the steps in the order that actually helps, reach out and I'll send it over. No pitch.