How Credit Works: Understand Your Credit Report And Score
Learn what information goes on your credit report, how credit scores are calculated and how banks use your credit history to make lending decisions.

If you only have 15 seconds to learn how credit works, memorize the graphic above. It shows you the six key factors that make up your credit score, the three-digit number that summarizes the entire US credit reporting system and determines whether you can get approved for a loan or a credit card.

The keys to a good credit score are paying your bills on time, having a mix of accounts (credit cards and loans), and keeping these accounts in good standing for many years.

But, have you ever wondered: How does credit work? Why do you need a credit report, anyway?

Why do we have credit reports and scores?

The credit history reporting system helps banks avoid lending money to customers who are already overextended or who have a history of not paying their debts.

Less than 100 years ago, banking was a very personal experience. If you wanted to borrow money, you would need to walk into a local bank and personally convince a loan officer to give you the loan. You would have needed to show proof of employment and, quite possibly, personal references who could vouch for your character.

Back then, nearly all lending was secured, meaning you would need to put up collateral in order to take out the loan. The most common example of a secured loan is a app德扑圈官方网址home mortgage in which the bank takes an interest in the property.

Since then, the rise of credit cards as a convenient, electronic purchasing tool has made unsecured lending quite common. And although unsecured lending can be more profitable for banks, it’s also highly risky because there’s no collateral for the bank to repossess if the debtor doesn’t pay back the loan.

As a result, the credit report system was created to give banks a centralized source of information about potential borrowers.

When did credit reporting start?

By the late 1950s and early 1960s, banks began collaborating to share customer credit data including account balances and payment histories.

These early “credit bureaus” were small and limited to individual communities. By 1970, however, a few large companies emerged as leaders in credit reporting. These companies would become the three credit bureaus we know today: TransUnion, Experian (with enrollment in Experian CreditWorksSM), and Equifax.

In 1970, Congress first passed the Fair Credit Reporting Act (FCRA) to regulate how credit reporting companies handled consumers’ personal information, but credit reporting was still primitive compared to the comprehensive reports we have today. By the early 1980s, credit bureaus began to electronically store the detailed personal information (Social Security numbers, addresses, dates of birth) as well as the loan, inquiry, and payment data that still comprise our credit reports today.

What information is on your credit report?

Your credit report contains information that identifies you, such as your name, address, and Social Security number and information about your borrowing activity, such as loan applications, balances, and payment histories.

In addition to your name, Social Security number, and date of birth, your report may also contain previous addresses and employment information. Despite all of this unique information, credit report mix-ups are still quite common, especially if you have a common last name like Jones or Brown.

The bulk of your credit report contains detailed information about recent activity on your financial accounts. This includes:

  • Credit inquiries: Any time you apply for credit—whether or not you are approved.
  • Open loans: Data will include the bank, the loan amount, the date you opened the loan, your monthly payment amount, and your payment history.
  • Open revolving accounts: These are your credit cards. Data includes the bank, your credit limit, the date you opened the account, your payment history, and the balance on the account as of your last statement date.
  • Closed accounts: Accounts will remain on your report even after they are closed for up to seven years.
  • Collections accounts: In the event you have a bill sold to collections, this account will appear on your credit report. This can happen even if the original debt wasn’t included on your credit report, such as a medical bill.
  • Public records: These include tax liens, court judgments, and bankruptcy filings.
  • Comments: Credit bureaus give you the ability to add comments to your credit report to explain records. Creditors can also add comments.

One thing your credit report does not contain is your credit score. The credit report is designed to track your credit history. The score is issued based on the information.

How do banks use your credit report?

Today, companies use the data in your credit report to create credit scores, which most lenders will use in their underwriting as an alternative to manually reading your credit file.

That said, you can expect an underwriter to look more closely at your credit report when you’re applying for a larger loan—such as a mortgage—or in cases where your credit score is “on the fence.”

In addition to approving your loan, your credit may determine how much you’ll pay for the credit. The higher your credit score is, the less interest bank will charge you for the loan.

Who cares? Well, you should if you care about saving money. For example, the difference in total interest payments on a $250,000, 30-year mortgage between a 5% interest rate and 8% interest rate is about $179,000. That is the cost of less-than-perfect credit.

Sometimes, companies will use your credit score for other decisions, too.

For example, you might be asked to submit to a credit check when renting an apartment or applying for a job that involves financial responsibility. (Some employers have used credit checks more broadly in their hiring process. I think that practice has dubious value, but it’s yet another reason to take care of your credit.)

Finally, insurance companies often use a specific version of your credit score in determining how much you’ll pay for car insurance.

What is a credit score?

A credit score is a three-digit number derived from the data in your credit report that indicates how likely you are to repay a loan on time in relation to other borrowers.

Different companies produce different credit scores under brand names like FICO Score and VantageScore.

Each of these companies may have several different versions of their score for different end uses (for example, one for mortgage lenders, one for credit card banks, another for car insurance companies).

Finally, each of these credit scores may differ depending on which of your three credit reports was used to pull the data. There are three credit bureaus: TransUnion, Experian with enrollment in Experian CreditWorksSM, and Equifax. Although most of your credit report will be the same across all three, there can be differences.

FICO Scores, which are used by 90% of lenders, are a highly trusted measure of whether a loan will be paid on time. Other types of scores simply use payment history to calculate your score, whereas FICO’s algorithms calculate your creditworthiness based on the information found in your credit report.

In general, however, all credit scores fall somewhere on a range between 350 and 900. The higher the score, the better your payment history and creditworthiness. A lower score means banks will consider you a higher risk customer.

What is a good credit score?

Although it depends on which score you’re looking at, you can be confident that a score of 720 is “good” on most scales, while a score of 800 is “very good” on most scales.

If you have a score of at least 700, you’ll have the best chance of getting approved for the best credit card offers, auto loan rates, and mortgage rates.

Scores in the high 600s aren’t necessarily bad, but they won’t qualify you for all loans or the best rates. With a sub-700 credit score, you could also still be declined for many of the best credit card offers.

Finally, it’s important to note that once your credit score approaches the high 700s to low 800s, any further increases won’t do much for you…banks will already give you the best rates. (It’s like if a prof awards an A+ to numerical grades of 97-100, once you hit 97 there’s no additional benefit to getting a 98 or 99, etc.)

How do you get a good credit score?

There are three big components to a good credit score: establishing a healthy mix of loans and revolving accounts over time, paying bills on time (every time), and avoiding high levels of debt.

How long does it take to build a good credit score?

The first step—building credit by establishing a healthy mix of loans and revolving accounts—is often the trickiest, because it’s a catch-22: You need to get credit before you have a credit history, but it’s difficult to get credit before you have a credit history!

There are several ways to establish credit for the first time, but it’s arguably easier to do when you’re young and either in college or still dependent on your parents. For example, you can:

  • Ask a parent to make you an ized user on one of their credit cards.
  • Take out a federal student loan, which generally does not require a credit check.
  • Take out a loan with a cosigner.
  • Get a secured credit card, which works like a prepaid debit card except it builds credit.
  • Get a credit builder loan.
  • Use a free service like Experian Boost™, which allows you to benefit from on-time payments that otherwise wouldn’t be included in your credit profile.

Once you have one open account, it becomes easier to get additional accounts after about six months. Over time, you’ll get the best credit score when you have at least one or two credit cards and one or two loans (like student or auto loans). That said, having more accounts is not necessarily better.

Finally, a key part of credit scoring is time. It typically takes three years of responsible credit use to have an average credit score in the mid to high 600s and up to seven years to develop a very good credit score of 700 or more.

Why is paying your bills on time so important?

Your payment history accounts for approximately 35% of your credit score, more than any other factor. Making consistent on-time payments is the number one thing you can do to build a good credit score.

Not surprisingly, nothing will wreck your credit score faster than failing to pay these bills on time. The longer you take to pay them (and the more often you’re late), the lower your credit score will fall.

An example: I’ve had fairly good credit all my life, but once many years ago I screwed up and paid two bills late (just by a few days). My credit scores fell by an average of 60 points and it took two years to fully recover.

How does debt affect your credit score?

Too much debt is bad for your finances and it’s bad for your credit score, too. Your overall debt level accounts for 30% of your credit score.

Credit-card utilization (or how much of a balance you carry in relation to your credit limit) affects your credit score. The higher your combined balances in relation to your combined credit limits, the more your credit score will suffer. For the best credit score, you want to keep this “utilization ratio” as low as possible.

Keep in mind that even if you pay your balance in full every month, your credit report reflects your card balance on the last day of your billing cycle. If you frequently use most of your available credit each month, your credit score will suffer even though you’re paying the balance in full every time. You can avoid this by paying off most of your balance on the day before your credit card billing statement closes. Your credit report will show a $0 balance—or close to it.

Other factors affecting your credit score

Other factors that affect your credit score include the average age of your credit accounts (credit file age), account diversity, recent credit inquiries, and public records. With the exception of public records, each of these factors make up about 10 to 15% of your credit score.

The longer you have had credit accounts open, the better. If you don’t have to cancel an old, unused credit card, don’t.

Your credit score won’t be as good as it could be if you only have credit cards or only have loans.

Finally, try to limit credit applications to no more than two every six months. Checking your own credit score is known as a “soft inquiry” and does not count toward this limit.

Too many credit applications in a short period of time can cause your score to go down because it looks like your desperate for credit. There’s an exception, however, for credit inquires of the same nature that indicate you’re rate shopping. If these inquiries are within a month or so of each other, they will generally only be counted as one inquiry.

Public records are one thing you definitely do not want on your credit report, because it usually means that someone has taken you to court over a debt. Many, like tax liens or credit judgments, can drag your score down for years.

A bankruptcy filing can be the kiss of death to your credit score, at least for a number of years. Your credit score can recover from bankruptcy, but it will take between seven and 10 years. Like building credit from scratch, the hardest part will be getting your first one or two credit accounts after bankruptcy. With few exceptions, this usually means starting with a secured credit card.

How do you fix bad credit?

The same way you build good credit! By paying your bills on time and staying out (or getting out) of debt.

Unless you’ve been the victim of identity theft or otherwise have errors on your credit report, the only way to “repair” your credit is to pay your bills, pay down debt over time, and limit applying for new credit.

Expect it to take between one to two years of responsible credit management to make an impact on a troubled credit score (longer in the case of bankruptcy), and be wary of anybody who tries to sell you shortcuts to a better credit score.

For more, read our article on how to repair your credit on your own.

How do you track your own credit?

These days it’s easy to track your credit score with any number of free credit monitoring apps or paid subscriptions. Many credit cards even provide your FICO Score on monthly statements, too.

You can sign up for a monthly credit monitoring service. There are both free and paid credit tracking services. The free services will typically give you one version of your credit score and a limited look at your credit report. Paid services are more likely to give you access to all of your credit scores and/or complete access to your credit report.

In the United States, the best way to review all three of your credit reports for free is to go to The US government mandates that all consumers can receive each of their three credit scores from this site once a year for free. While checking your complete reports at least once a year is the bare minimum, I would also recommend using another free credit monitoring service to routinely monitor your score and get alerted to any problems.

It’s important to re-emphasize that your credit report will not contain your credit score. For that, you can sign up for a service like myFICO if you don’t receive the information from your lending institution or credit card provider. Make sure you’re keeping an eye on your FICO score, as it’s the one most likely to be used when you apply for credit in the future.

Credit monitoring is also really helpful if you’re getting ready to apply for a mortgage or you suspect you’re susceptible to someone else trying to use your credit information.

To get an immediate idea of where your score is without creating any new accounts, use our simple credit score estimator tool.

Credit Score Estimator

Estimate your credit score in about 30 seconds. Just answer a few simple questions about your past credit usage:


Another way to improve your score is to sign up for a tool that monitors it for you. myFICO not only allows you to monitor your FICO score, but you can also set up alerts for any unusual activity. By catching fraud early, you’re more likely to protect your credit score. myFICO gives you credit scores on all three bureaus and up to 28 versions of your FICO score, as well as credit reports and identity theft protection.

Pricing for myFICO starts at $19.95 per month. Once you have the app, you can set goals and get tips on working toward reaching them. If you want to buy a house, for instance, myFICO will give you the score most closely connected to getting a mortgage.

Credit Score Estimator

Estimate your credit score in about 30 seconds. Just answer a few simple questions about your past credit usage:
1 Have you ever had a credit card or loan?
2 How long ago did you open your first credit card or loan?
3 Have you ever made a late loan or credit card payment?
4 How many new loans or credit cards have you opened or applied for in the past 6 months?
5 In the last five years, have you:
  • Gone through foreclosure or repossession?
  • Had debt go to collection?
  • Made a loan or credit card payment 90 days (or more) late?
6 In the last ten years, have you declared bankruptcy?
7 What is the total credit limit for all your credit cards?
8 What is your total amount of credit card debt?


Credit reports record your payment history on all of your installment loans and credit cards.

Credit scores quickly summarize your creditworthiness on a scale between 300 and 900 based on the data contained in your credit report—the higher your score, the higher your chance of getting the best rates on loans and credit cards.

Banks use credit reports and scores to decide whether to loan money, but your credit information may also be used for apartment rentals, employment screening, and insurance underwriting.

Maintaining a good credit score isn’t difficult. Don’t overextend yourself, but don’t avoid credit altogether. Get a loan and a couple of credit cards and pay the bills religiously.

Check your credit now: Find the right credit monitoring service to start tracking your credit score today.

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About the

Total Articles: 354
David Weliver is the founder of Money Under 30. He's a cited ity on personal finance and the unique money issues he faced during his first two decades as an adult. He lives in Maine with his wife and two children.

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robert chilelli says:

the only issues im having even though my cresit score was up to a 715 twice my father and I have the sane name and he filed bankruptcy and they merged everythibg onto my credit..
so I’m soing my best to pay it back down once agaib

Kelsey says:

Hey David,

How can I entitle a free credit report, can you tell me about it?

Kelsey says:

And also, who is allowed to view your credit record?

Matt says:

Hello David is there a UK equivalent to Credit Karma I have just signed up to Experian for a 30 day trial to see what is on there and remove any indiscrepancies. I have checked google but haven’t had much luck so far.

Abbey says:

Thank you so much! I’m a senior about to head off to college and had no idea what a credit score was until I had to write a speech about financial responsibility. This was really easy to follow and I finally realize just how important a credit score is. Thanks again!

Rachel says:


I have heard that checking your credit score brings it down, is that true?

David Weliver says:

Rachel, checking your own credit report or score will NOT bring it down. If you apply for credit and somebody ELSE checks your credit—then your score may decrease a few points.

James says:

I created an account with Credit Sesame based on this site’s recommendation, and in this month’s update it reported my credit score lowered by 15 points. The only change in my spending & debt in this period is my using two credit cards for every purchase I make. The reason is reward points, and my (maybe mistaken) understanding that higher usage, with the balance paid in full each month, will help raise my credit score. But my usage is still at only about 4% of my limit. Can the higher usage negatively impact the score — or, since you mention above that Credit Karma is “accurate within 10-20 points of my actual FICO score,” should I not obsess over Credit Sesame’s figure?

James says:


After reading this post I created an account with Credit Karma and that site reported my credit score 113 points below the number I was given by Credit Sesame. What are your thoughts on the discrepancy? Thanks!

David Weliver says:

Hi James: Each credit score is a little bit different. Whether you get it from Credit Karma, Credit Sesame, myFico or another paid credit score provider, each could be using a different algorithm and a different credit reporting provider. Hence, your credit score is relative…the best thing to do is to find one source and track your score for a few months. From each source, you can also find out what the max score is…if one is on a scale up to 850 and another 950, you can see how it’s not apples to apples…

Liz says:

This is probably a basic question, but I’m 20 and just opened my first credit card. Is it bad for my credit score if I make payments throughout the month online versus paying at the end of the month when my statement is due?

Alex says:

Thanks for all the info! Quick question: I have a Southwest Visa (I fly a lot) and like to use it to pay my school bills. Unfortunately, every time I use it to pay my school bill, I max it out – although I’m careful to not exceed the credit limit. I pay it back almost immediately… but is the fact I’m periodically using most of my credit negatively affecting my credit score?

The Prudent Planner says:

When I worked at the bank I had quite a few non-resident aliens come in to open a secured credit card. I think it’s a good way to start and put credit on your name.

Michal says:

Great Tips! You make if very easy to understand how credit works!

The Oil Barron In Training says:

How does paying things off early affect your score. I recently bought a car and put half down. I had planned on buying it out right, but my old car broke down before I had the cash. I took out a 5 year loan, but three months later I hit a big win in the stock market and paid my car off way early. Being that this drastically reduced the interest paid on the loan, will it hurt my credit score?

David Weliver says:

Hey Oil Barron. I too, paid off a car loan early and was surprised to see my credit score go down…but it came back up within a few months. It’s one of many flaws (IMO) of our credit system that penalize smart behavior. The logic is that a person with a mix of OPEN accounts (credit cards, mortgage, auto loans, etc.) is a better credit risk than somebody who only has credit cards. So when you pay off (and CLOSE) one of those accounts, it may impact your score negatively, at least in the short-run.

Amber says:

I like Credit Karma because it actually allows you to put all these different factors into play and simulate the effects they will have on your score. For example, thinking of skipping a bill payment? That’ll be 10 points or more. Thinking of getting a second credit card? no effect. Etc. It really answered questions I have had about How Much different actions impact your score, regardless of how close to FICO their free score really is.

Laurie says:

I went to creditkarma. I was a little weary because it asked for my social security, but because you recommended it and it was a secure site.. I went for it. Now I know my credit score 🙂

David Weliver says:

Glad it worked for you Laurie. They’re legit; they need your SSN to get your credit information as does any credit checking site.

Laurie says:

Thanks for all the helpful tips. I am going to try the free website 🙂

Tim says:


LOVE the napkin! Seriously, I might use that in one of my presentations…

Like you said, it might be somewhat remedial, BUT just like budgeting skills…to know and to practice are two very different things, and a friendly reminder can be a nice way to kick you in the butt and get you back on the right track.

Keep up the good work!


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