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Credit Explained: Everything You Need to Know
Summary
Credit measures how reliably you borrow and repay money and it directly impacts your ability to qualify for a mortgage, the loan type you're offered, and the interest rate you'll pay. Your credit score is calculated across five factors: payment history, credit utilization, length of credit history, credit mix, and new inquiries. To improve your score, focus on paying on time, keeping balances low, and avoiding new credit activity before applying for a mortgage. Ideally, start working on your credit 12–24 months before you plan to apply. The earlier you start, the more options you'll have.
Whether you're dreaming about your first home, planning to refinance, or just trying to make smarter financial decisions, there's one thing that will follow you through nearly every major milestone: your credit.
And yet, for something so important, credit can feel surprisingly mysterious. What's actually in your credit report? Why did your score drop when you did something that seemed perfectly reasonable? And what does any of it have to do with the interest rate on your mortgage?
Our goal is to help demystify credit and give you all the information you need to make smart financial decisions. In this guide you'll learn everything you need to know about credit: what it is, how it's calculated, why it matters for homebuying, and what you can do to put yourself in the best possible position when you're ready to apply for a mortgage.
What Is Credit? And How Does It Work?
At its core, credit is pretty simple: it's an agreement between you and a lender where they give you money now, and you promise to pay it back later (usually with interest). A credit card, a car loan, a mortgage — they're all just different versions of that same basic agreement.
Now to expand on that basic concept, there are different types of credit that serve different purposes. Not all credit works the same way, and understanding the difference can help you make smarter decisions about how you borrow.
Revolving Credit is the kind that gives you a spending limit you can borrow against repeatedly. Credit cards are the most common example. You spend, you pay it off (or carry a balance), and your available credit replenishes as you pay it down. A Home Equity Line of Credit, or HELOC, works similarly. With revolving credit, how much of your available limit you're using at any given time matters.
Installment Credit works differently. This is a fixed loan or a set amount you borrow and pay back in regular installments over a defined period of time. Mortgages, auto loans, student loans, and personal loans all fall into this category. The balance goes down with every payment, and once it's paid off, it's closed.
Having a healthy mix of both types is viewed favorably by lenders. It shows you can manage different kinds of financial responsibility.
Who’s Keeping Track of My Credit?
Every time you open an account, make a payment, miss a payment, or apply for new credit, that information gets reported to one or more of the three major credit bureaus: Equifax, Experian, and TransUnion. You can think of them as the recordkeepers of your financial history. They collect data from lenders and creditors and compile it into your credit report, which is a detailed snapshot of how you've managed credit over time.
From that report, a credit score is then calculated — a single number that gives lenders a quick, standardized way to assess how risky it might be to lend to you. The higher the score, the more confident a lender feels that you'll pay them back. That score carries a lot of weight, especially when it comes to buying a home.
How Your Credit Score is Calculated
Your credit score isn't random, and it doesn't just reflect whether you pay your bills on time. It's actually calculated using a specific formula that weighs several different factors. The most widely used scoring model is the FICO Score, and it breaks down like this:
- Payment History (~35%): The biggest piece of the puzzle. Lenders want to know if you pay what you owe, and do you pay it on time? A strong record of on-time payments is the single most powerful thing you can do for your score. Even one missed or late payment can leave a mark, and the more recent it is, the more it hurts.
- Credit Utilization (~30%): This refers to how much of your available revolving credit you're actually using at any given time. As a general rule, keeping your utilization below 30% is good; below 10% is even better. This is why maxing out a credit card, even if you pay it off every month, can temporarily ding your score.
- Length of Credit History (~15%): The longer your credit history, the better. This is one of the reasons financial advisors often caution against closing old credit cards, even ones you rarely use. That decade-old card you never touch? It might be quietly helping you.
- Credit Mix (~10%): Lenders like to see that you can handle different types of credit responsibly. Having a mix of revolving credit and installment loans signals that you're a well-rounded borrower.
- New Credit & Hard Inquiries (~10%): Every time you apply for new credit, the lender typically runs a hard inquiry on your credit report. One inquiry won't tank your score, but several in a short window can add up. It's worth being selective, especially in the months leading up to a mortgage application.
What Do the Numbers Actually Mean?
FICO scores range from 300 to 850. Here's a general breakdown of how those numbers are typically categorized:
| Score Range | Rating |
|---|---|
| 800-850 | Exceptional |
| 740-799 | Very Good |
| 670-739 | Good |
| 580-669 | Fair |
| 300-579 | Poor |
Most conventional mortgage lenders look for a score of at least 620, though a higher score will almost always mean better loan terms and a lower interest rate. If your score is on the lower end right now, don't panic. Scores can improve with time and the right habits.
Understanding Your Credit Report
Your credit score gets a lot of attention, but it's actually your credit report that tells the full story. Think of your credit report as the detailed chapter book and your credit score as the summary on the back cover. The score gives lenders a quick snapshot, but the report is where all the important detail lives.
What’s in a Credit Report?
Your credit report is compiled by the three major credit bureaus (Equifax, Experian, and TransUnion) and contains four main categories of information:
- Account Information: A record of every credit account you've opened, including credit cards, mortgages, auto loans, and student loans. For each account, your report will show the lender's name, the date the account was opened, your credit limit or loan amount, your current balance, and your payment history.
- Payment History: A detailed log of whether you've paid your accounts on time, including any late or missed payments. This is the section lenders scrutinize most closely, and negative marks here can stay on your report for up to seven years.
- Credit Inquiries: A list of everyone who has accessed your credit report. This includes hard inquiries (triggered when you apply for new credit) and soft inquiries (like when you check your own credit or a lender pre-screens you for an offer). Only hard inquiries affect your score.
- Public Records: This section captures major financial events like bankruptcies. These are serious negative marks that can significantly impact your ability to get approved for a loan and can remain on your report for seven to ten years depending on the type.
How to Get a Free Credit Report
You're entitled to a free copy of your credit report from each of the three bureaus every year through AnnualCreditReport.com (the only federally authorized source for free credit reports). Since each bureau may have slightly different information on file, it's worth checking all three.
When you pull your report, look for anything that seems off: accounts you don't recognize, incorrect balances, or payments marked late that you know you made on time. If you spot an error, you have the right to dispute it directly with the bureau, and they're required to investigate.
If you're planning to apply for a mortgage in the next year or two, reviewing your credit report early gives you time to address any issues before they affect your loan application.
What do Mortgage Lenders Look for in a Credit Report?
When considering you for a loan, mortgage lenders will review your credit report and use the information found there to decide:
- Whether or not to approve you for a loan
- The type of loan for which you qualify
- The interest rate to charge you
Your credit report displays your credit history and the credit score derived from this history. Your credit score, shown as a number, provides lenders with a fast and objective way to predict how likely you are to repay a loan.
How to Build or Improve Your Credit
If you’re someone who has a fair to low credit score, the good news is that there are concrete steps you can take to improve it. Credit scores aren't fixed, they respond to your behavior over time. If you're planning to apply for a mortgage in the next year or two, here's where to focus your energy.
Pay On Time, Every Time
This one isn't surprising, but it's worth mentioning. Payment history is the single largest factor in your credit score, accounting for about 35% of your total score. One missed payment can do real damage, and the later a payment gets, the worse the impact.
The easiest way to protect yourself is to set up autopay. Even if it's just the minimum payment, automating your bills removes the risk of a forgotten due date derailing your score. If autopay isn't an option, setting calendar reminders a few days before each due date works too.
Keep Your Credit Utilization Low
As a general rule, try to keep your credit card balances below 30% of your available limit and if you're actively trying to improve your score, aim for under 10%. If you have a $5,000 credit limit, that means keeping your balance under $500 when possible.
A few practical ways to do this:
- Pay your balance down before your statement closing date, since that's typically when your balance gets reported to the bureaus
- Ask your card issuer for a credit limit increase — if your spending stays the same, a higher limit automatically lowers your utilization
- Spread purchases across multiple cards rather than concentrating them on one
Don't Close Old Accounts
It can be tempting to close a credit card you no longer use, but think twice before you do. Closing an account reduces your total available credit (which raises your utilization) and can shorten the average age of your credit history, both of which can pull your score down.
Unless a card carries a high annual fee that isn't worth it, the better move is usually to keep it open and use it occasionally for a small purchase, then pay it off right away. That keeps the account active without adding any financial burden.
Avoid Opening New Accounts Before a Mortgage Application
Every time you apply for new credit, it triggers a hard inquiry on your report, and opening several new accounts in a short period of time can signal financial instability to lenders. In the six to twelve months before you plan to apply for a mortgage, it's best to avoid applying for new credit cards, financing large purchases, or taking out any new loans unless absolutely necessary.
This also applies to co-signing on someone else's loan. Even if you never make a single payment, that debt shows up on your credit report and can affect both your score and your debt-to-income ratio.
How Long Does It Take to See Improvement?
This is one of the most common questions people have, and the honest answer is: it depends on where you're starting from and what's affecting your score.
Here's a general sense of the timeline:
- Quick wins (1–2 months): Paying down high balances and lowering your utilization can show up in your score relatively quickly, sometimes within a billing cycle or two.
- Medium-term improvements (3–6 months): Establishing a consistent pattern of on-time payments starts to meaningfully move the needle within a few months.
- Longer-term recovery (1–2+ years): Bouncing back from more serious negative marks like missed payments, collections, or high debt takes more time and sustained effort. The good news is that the impact of negative items fades as they get older.
How Far in Advance Should You Start Working on Your Credit?
When it comes to preparing for a mortgage, one of the biggest mistakes buyers make is waiting too long to think about their credit. It's easy to put it off and think “I’ll deal with it when the time comes”, but by then, you may not have enough time to make meaningful improvements before your application.
If homeownership is on your horizon, the sweet spot for starting your credit preparation is one to two years before you plan to apply for a mortgage. That might sound like a long time, but it gives you the breathing room to make some of the improvements listed above.
Even if your credit is already in good shape, starting early gives you the opportunity to fine-tune your profile and potentially qualify for a better interest rate (which can save you tens of thousands of dollars over the life of your loan).
Why Checking Your Credit Early Is Worth It
Pulling your credit report early in the homebuying journey isn't just about knowing your score, it's about giving yourself options. When you know where you stand, you can make informed decisions about timing, set realistic expectations about the loan types and rates you might qualify for, and tackle any issues while you still have time to fix them.
And remember: checking your own credit is a soft inquiry, which means it has absolutely no impact on your score. There's no downside to looking.
Ready to Take the Next Step?
Understanding your credit is one thing, but knowing how to use it to your advantage in the homebuying process is another. At Onity Mortgage, our experienced loan officers work with borrowers at every stage of the credit journey, whether you're just starting to build your profile or you're polishing up a strong one before applying.
We can help you understand exactly where you stand, what mortgage options may be available to you, and what steps (if any) are worth taking before you apply. The earlier you start that conversation, the more we can do to help set you up for success.
Contact one of our loan officers today or explore our mortgage resources and FAQs to learn more. You can also reach us directly at 1-877-319-0577 to further explain credit and discuss your personal situation.
Credit FAQs
No, checking your own credit is considered a soft inquiry and has zero impact on your score. You can (and should) check it regularly without any concern. The only inquiries that affect your score are hard inquiries, which happen when a lender pulls your credit as part of a loan or credit application.
It depends on the loan type. Most conventional loans require a minimum score of 620, FHA loans can go as low as 580 (with a 3.5% down payment), and VA loans typically require 620 through most lenders — though the VA itself doesn't set a minimum. Keep in mind that a higher score almost always means better terms and a lower interest rate.
Most negative marks, like late payments or collections, stay on your report for up to seven years. More serious events like bankruptcies can remain for seven to ten years depending on the type. The good news is that their impact on your score fades over time, especially as you build positive history alongside them.
There isn't a magic number, what matters more is how you manage them. Having more than one card can actually help your score by increasing your total available credit (which lowers your utilization) and contributing to your credit mix. The key is keeping balances low and paying on time across all of them.
Possibly, it depends on how low your score is and what type of loan you're pursuing. FHA loans are the most accessible option for borrowers with lower scores. That said, a lower score typically means a higher interest rate, which increases your monthly payment and the total cost of your loan. Working with a loan officer early can help you understand your options and decide whether it makes sense to apply now or spend time improving your credit first.
