You can build credit before 18, but the routes are limited and require an adult co-signer
Credit bureaus track financial behaviour from age zero, but you cannot sign a contract alone until you turn 18. That means every credit-building tool for teenagers — secured cards, authorized user accounts, credit-builder loans — requires a parent or guardian to co-sign or sponsor the account. The good news is that starting early, even with these restrictions, gives you a head start on the credit history that will affect your interest rates, insurance premiums, and rental applications for the next 30 years.
The three realistic paths are becoming an authorized user on a parent's card, opening a secured credit card with a co-signer, or taking out a credit-builder loan through a credit union. Each builds credit differently and carries different risks — both for you and for the adult involved.
Key Takeaways
- You need a parent or guardian to co-sign or sponsor any credit account before you turn 18, because you cannot legally sign a contract on your own.
- Becoming an authorized user on a parent's existing card is the easiest route if the primary cardholder pays on time, because their payment history counts toward your credit score.
- A secured credit card requires a cash deposit (usually $200 to $2,500) held as collateral, and builds credit only if the issuer reports to all three credit bureaus.
- Credit-builder loans from credit unions let you borrow money you cannot access until you repay it, which forces the savings habit while building credit history.
- The single biggest factor in your credit score is payment history, so missing even one payment as an authorized user or cardholder will damage both your credit and the adult's.
Becoming an Authorized User on a Parent's Card
This is the lowest-friction option if your parent or guardian has a credit card with a good payment history. When you are added as an authorized user, the card's entire history — including on-time payments, credit limit, and balance — typically reports to the credit bureaus under your name. You do not need to make payments yourself; the primary cardholder does. Your credit score rises or falls based on their behaviour.
The catch is that you inherit both the benefits and the risks. If the primary cardholder misses a payment, your credit score drops too. If they carry a high balance relative to the credit limit, that hurts your score even if you never use the card. Some issuers allow you to have a physical card; others issue only an account number. Ask the card issuer whether they report authorized user accounts to Equifax, Experian, and TransUnion — not all do, and if they report to only one bureau, the benefit is limited.
This route works best when the adult has a long history of on-time payments and keeps the balance low. If they are rebuilding their own credit or carry high balances, you are better off with a secured card or credit-builder loan instead.
Opening a Secured Credit Card with a Co-Signer
A secured card requires you and a co-signer to deposit cash — usually between $200 and $2,500 — into a savings account held by the card issuer. That deposit becomes your credit limit. You use the card like a regular credit card, and your monthly payments are reported to the credit bureaus. After 12 to 24 months of on-time payments, many issuers convert the card to an unsecured card and return your deposit.
The co-signer's role varies by issuer. Some require a co-signer to may provide the debt if you do not pay; others use the co-signer only to verify your identity. Before opening an account, ask the issuer in writing whether the co-signer is liable for the debt. If they are, they are taking on real risk — missed payments will damage their credit score too.
The deposit is not a fee; it is your own money held in reserve. But the card usually carries an annual fee ($25 to $100) and a higher interest rate than unsecured cards. Only open a secured card if you plan to use it and pay the full balance each month, because the interest charges will outweigh the credit-building benefit. Check that the issuer reports to all three credit bureaus; some secured card programs report to only one or two.
Credit-Builder Loans Through Credit Unions
A credit-builder loan is a tool designed specifically to build credit. You and a co-signer borrow a small amount — typically $500 to $1,500 — but the money is held in a savings account you cannot touch until the loan is repaid. You make monthly payments on the loan, and those payments are reported to the credit bureaus. Once you finish repaying, you get access to the money you borrowed.
This structure forces a savings habit while building credit. You are essentially paying yourself back, and the credit bureaus see a history of on-time payments. Credit unions often offer these loans to members with little or no credit history, and the terms are usually more forgiving than a secured card.
The co-signer is typically liable if you do not pay, so again, they are taking on risk. The interest rate is usually low (3 to 8 percent depending on the credit union), but you are still paying to borrow your own money. This is most useful if you need to build savings alongside credit history, and if you are confident you can make the monthly payments on time.
Why Payment History Matters More Than Anything Else
Your credit score is built on five factors: payment history (35 percent), amounts owed (30 percent), length of credit history (15 percent), credit mix (10 percent), and new credit inquiries (10 percent). As a teenager, payment history is the only one you can control when ready. A single missed payment will drop your score by 100 points or more, and it stays on your report for seven years.
This is why the adult co-signing or sponsoring your account is taking a real risk. If you miss a payment, their score drops too. Before you open any account, be honest with yourself: can you make the payment every month, on time, without reminders? If the answer is no, wait until you can. Building credit slowly with perfect payments is better than building it quickly and then destroying it with missed payments.
What to Avoid Before You Turn 18
Do not open multiple accounts in a short time. Each new account inquiry (called a hard pull) lowers your score slightly, and opening many accounts signals risk to lenders. Space out applications by at least six months.
Do not carry a balance on a credit card if you can help it. The interest charges are expensive, and a high balance relative to your credit limit (called utilization) damages your score. If you open a card, use it for small purchases you can pay off in full each month.
Do not let anyone else use your card or account, even a friend. You are liable for all charges, and if they do not pay, it is your credit that suffers. Similarly, do not co-sign for anyone else's debt before you turn 18 — you do not have the income or credit history to take on that risk.
Do not ignore your credit report. You can request a free copy from AnnualCreditReport.com once per year. Check it for errors or accounts you did not open. If you find fraud, report it to the credit bureau and the issuer when ready.
Building Credit Takes Time, But Starting Early Pays Off
Credit scores are built on history, and history takes time. A 16-year-old who opens a secured card and makes on-time payments for two years will have a stronger credit profile at 18 than a peer who waits until college to open their first account. That difference compounds: a higher score at 18 means lower interest rates on student loans, car loans, and mortgages over your lifetime.
The key is consistency. One missed payment can undo months of good behaviour. If you are not ready to make a payment every single month without fail, you are not ready for credit. Wait until you have the discipline and the income (from a job or allowance) to back it up. Starting late with perfect payments is better than starting early and building bad habits.
Frequently Asked Questions
Can I build credit without a co-signer?
No. You cannot sign a legal contract until you turn 18, so every credit account requires a parent or guardian to co-sign or sponsor it. Some issuers allow you to become an authorized user without a co-signer, but that still requires an adult to own the primary account.
What happens to my credit if the adult co-signing misses a payment?
Your score drops along with theirs. If you are an authorized user or the co-signer is liable for the debt, missed payments damage both credit reports equally. This is why it is critical to choose a co-signer with a strong payment history and to discuss the arrangement clearly before opening the account.
How long does it take to build credit as a teenager?
Credit bureaus need at least six months of payment history to generate a score. Most lenders want to see 12 to 24 months of on-time payments before they consider you a lower-risk borrower. Starting at 16 means you could have two years of history by the time you explore for a student loan at 18.
Should I get a credit card or a credit-builder loan?
A credit-builder loan is better if you need to build savings and have no income. A secured card is better if you have income and want to practice using credit responsibly. Both build credit equally well if you make on-time payments. Choose based on your situation, not on which sounds easier.
Will becoming an authorized user hurt the primary cardholder?
No, as long as you do not use the card or the primary cardholder pays the bill on time. If you use the card and the balance goes unpaid, it damages both credit scores. Discuss the terms clearly: will you have a physical card, or just an account number? Who pays the bill? What happens if you miss a payment?