Your credit score is a three-digit number — typically between 300 and 850 — that represents how likely you are to pay your bills on time. According to Equifax, creditors and lenders use it as one of their primary factors when deciding whether to approve you for a loan, credit card, or mortgage, and it directly influences the interest rate and terms you're offered. Think of it as a financial reputation score — one that follows you into nearly every major money decision you'll make.

But your credit score's reach goes well beyond borrowing. As Bankrate reports, landlords, insurers, and employers also frequently use credit information as a measure of reliability and responsibility. Without good credit, you may face fewer housing options, higher security deposits, higher insurance premiums, and in some states, reduced job prospects. Good credit, by contrast, opens doors — to better loan terms, lower monthly payments, and thousands of dollars in savings over the life of a mortgage or car loan.

The good news: your credit score is not fixed. It's calculated from the information in your credit report, and the behaviors that drive it — paying on time, keeping balances low, maintaining older accounts — are entirely within your control. The interactive tool below breaks down exactly how each factor is weighted and what you can do right now to move the needle.