One common credit card question: Does your salary and income impact your credit score? You may be glad to know it doesn't. The size of your paycheck does not influence whether you have a good or bad credit score.
"Income isn't considered in credit scoring systems," John Ulzheimer, formerly of FICO and Equifax, tells CNBC Select.
"Income isn't even on your credit reports so it cannot be considered in credit scores because credit scores only consider what's on your credit reports," Ulzheimer explains. "In fact, no wealth metrics are factored into your credit scores."
That means your debt-to-income ratio and net worth also don't impact your credit score.
Are you struggling with a low credit score? Check out CNBC Select's round-up of the best cards for building or rebuilding credit.
Income doesn't affect your credit score, but it's still important to know the five main factors of a FICO credit score, which is the most common credit score used by lenders.
While income doesn't affect your credit score, Ulzheimer adds a disclaimer: "That certainly doesn't mean income and wealth aren't considered by lenders." After all, when you fill out a credit card application, you will be asked to enter your income.
When lenders review your eligibility for credit, he explains, they typically measure two things: Your ability to pay your bills (also known as capacity) and whether you pay your bills (also known as credit risk).
Income is considered a measurement of your capacity, not credit risk. While income doesn't have a direct impact on your credit score, it can have an indirect impact since you need to have sufficient income to pay your bills. And if you don't make enough money to cover your bills, you can rack up debt or miss payments, which can negatively impact your credit score.
The size of your income doesn't necessarily affect your credit limit, and having a high salary doesn't guarantee a higher line of credit. However, if you update your income with a card issuer to a higher amount, you may see an increase in your credit limit, which could be positive for your credit utilization ratio. Also some charge cards, like the American Express® Gold Card, have no preset spending limit, which means they don't assign a credit limit.
Want to learn more about credit scores? Here's how to understand and check your credit score for free and how to check your odds of getting approved for a credit card without hurting your credit score.