When Should You Start Building Credit?
The short answer: as soon as you turn 18. That's the minimum age to open a credit account in your own name under federal law. But there's no upper limit — whether you're 18 or 58, starting now beats waiting.
Here's why timing matters. The FICO scoring model needs at least one account open for six months and at least one account reported to a credit bureau within the last six months before it generates a score. VantageScore can generate a score faster — sometimes within one or two months of your first reported account. Either way, the clock doesn't start until you open something.
If you're under 18, you still have options. A parent or guardian can add you as an authorized user on their credit card. The account history gets reported to your credit file, giving you a head start. The Consumer Financial Protection Bureau notes that authorized user status is one of the most accessible ways to begin establishing credit.
The real cost of waiting isn't just a missing score — it's the compounding effect. Length of credit history accounts for roughly 15% of your FICO score. Every month you delay is a month of history you'll never get back.
The best age-based approach
| Your age | Best first move |
|---|---|
| Under 18 | Become an authorized user on a parent's card |
| 18–21 | Secured credit card or credit builder loan |
| 21+ with income | Student or starter unsecured card |
| Any age, any income | Rent reporting services |