Five main factors that affect your credit score
The actual FICO formula is a well-guarded secret. For example, there's no way to know exactly what combination of information will result in a particular score. But we do know the information used in the formula and how much weight each category carries.
Payment history (35%)
This shouldn't come as a surprise. The most important factor in your credit score is your payment history. Lenders want to know that you're likely to pay your bills on time, so it's only natural that this is the most important area of focus.
As a result, the most surefire way to increase your credit score over time is to pay all of your bills on time every month. Conversely, since it's such an important part of your credit score, making even one late payment can have a big negative impact on your credit that can take time to rebuild from.
The types of accounts typically used to gather your payment history data include (but are not necessarily limited to) credit cards, installment loans (like auto loans), and mortgages. If you have other credit lines, like a home equity line of credit (HELOC), those are typically included as well. Adverse information such as bankruptcies and legal judgments are also included in the payment history category.
Amounts owed (30%)
The next largest factor in your FICO® Score is the amount of money you owe to your creditors, which accounts for 30% of your score.
However, this doesn't necessarily mean the dollar amounts of your debt. This category has more to do with your credit account balances relative to your available credit limits, and your loan balances relative to their original amounts. This is a concept known as credit utilization ratio.
For example, if you have a credit card with a $5,000 limit and have a $2,000 balance, you're using 40% of your available credit. On the other hand, if you have a $4,000 balance on a card with a $20,000 limit, you're only using 20% of your credit. The latter situation could be considered more favorably in your FICO® Score even though the amount you owe is higher.
Experts typically suggest keeping your credit account balances at or below 30% of your available credit, and even lower than that is better.
Length of credit history (15%)
You don't need a long and established credit history to have a great FICO® Score, but it is one of the categories of information that is used in the calculation. Generally speaking, a longer credit history is better than a short one.
Specific time-related factors include the age of your oldest and newest credit accounts, the average age of all of your credit accounts, and how long each of your individual credit accounts have been open.
New credit (10%)
You may have heard that if you apply for new credit, your FICO® Score could go down. It's true, and this category is why. Research has shown that applying for too many new credit lines within a short period of time is an indicator of higher credit risk.
This includes credit inquiries, as well as newly opened accounts. To be sure, a single credit inquiry (also known as a hard credit check) or new account isn't likely to have much of an impact. But if you're applying for several new credit accounts at the same time, it could have a significant effect on your credit score.
Credit mix (10%)
This is one that many people don't realize is a data point. The FICO formula considers the variety of account types reported on your credit file. In other words, if you have a mortgage, an auto loan, and a credit card account, it could be better than having just three credit card accounts.
Fair Isaac, the company behind the FICO® Score, has said that the credit mix category is most important for people who don't have a ton of information in the other credit scoring categories. For example, if you have a relatively short credit history, a good credit mix could help increase your credit score.
