In the United States, you generally have to be at least 18 to open your own credit card — but there’s an extra rule for people under 21, and younger teens still have ways to start building credit. Here’s how the age rules work and what your options are at each stage.
The basic age requirement: 18
You usually have to be at least 18 years old to legally sign a credit card contract in your own name. Before 18, you can’t be the primary account holder on a card.
But turning 18 alone isn’t always enough to get approved. Card issuers also look at whether you can repay what you borrow — which is where the under-21 rule comes in.
The special rule for ages 18 to 20
Under the Credit CARD Act, applicants under 21 generally need to show they have independent income to repay the card, or have a co-signer who takes responsibility for the debt. This rule exists to protect young adults from taking on debt they can’t handle.
Independent income can include money from a job. If you don’t have qualifying income, a co-signer or a different path (below) may be your best option — though not all issuers offer co-signing.
Options for teens under 18
If you’re under 18, the most common route is becoming an authorized user on a parent’s or guardian’s card. You get a card to use, and the account’s history can help you build credit — without you being legally responsible for the balance.
Some debit cards and prepaid cards are also designed for teens. These don’t build credit on their own, but they’re a safe way to practice managing money before you qualify for a real credit card.
Starter cards once you turn 18
When you’re ready for your own card, secured cards and student cards are common starting points. A secured card requires a refundable deposit that usually sets your credit limit, which makes approval easier when you have little or no credit history.
Used responsibly — small purchases, paid in full and on time — a starter card helps you build the credit history you’ll later need for better cards, apartments, and loans.
Frequently asked questions
Can I get a credit card at 18 with no job?
It can be harder. Applicants under 21 generally need to show independent income or have a co-signer. Without either, becoming an authorized user or using a secured card may be better first steps.
Does being an authorized user build my credit?
It can. If the card issuer reports authorized-user activity to the credit bureaus and the account is managed well, that positive history can appear on your credit report.
What’s the youngest age to start building credit?
There’s no single rule, but many parents add teens as authorized users years before 18. The account’s good history can help establish credit early.
By O.B., Founder · Last reviewed June 3, 2026
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This article is general education, not personalized financial advice. Card terms, fees, and benefits are set by the issuer and can change — always confirm details on your official card terms.