To start building credit at 16, the workable route is being added as an authorized user on a parent’s or guardian’s credit card so their account’s payment history begins appearing on your credit report. A co-signed credit-builder loan through a credit union is a secondary option. You cannot open a credit card or loan on your own at this age, and no legal workaround changes that.
Why You Can’t Open Your Own Account Yet
Two rules block it. Contract law lets minors void most contracts in nearly every state, so lenders have no reliable way to enforce repayment against someone under 18. On top of that, federal law under 15 U.S.C. § 1637(c)(8) prohibits opening a credit card account for anyone under 21 unless they either provide a co-signer at least 21 years old or show independent ability to repay.1Office of the Law Revision Counsel. 15 USC 1637 – Open End Consumer Credit Plans Layer the two together and issuers won’t take the risk, even with a co-signer, because the minor could still void the underlying contract.
That leaves two real paths at 16: piggybacking on an adult’s existing account, or borrowing on a credit-builder product with an adult on the hook alongside you.
Getting Added as an Authorized User
This is the most effective option. The primary cardholder contacts their card issuer — online, by phone, or in person — and provides your full legal name and Social Security number. You usually receive a card in your name linked to their account, and the account’s history can begin flowing onto your credit file.
It works because the credit bureaus create a file for you and attach the account’s data to it. If the primary cardholder has years of on-time payments and low balances, that positive track record is effectively inherited.
Call the Issuer Before You Do Anything
Not every issuer reports authorized user activity to the credit bureaus when the user is under 18. Some add the account to your credit file immediately; others wait until you turn 18, which means being added at 16 produces nothing during those two years. Minimum ages vary too — Discover allows authorized users as young as 15, and American Express sets its minimum at 13.2Experian. What Is the Minimum Age for an Authorized User
Before going through the process, call the issuer and ask two specific things:
- Can a 16-year-old be added as an authorized user on this card?
- Will the account be reported to the credit bureaus before the user turns 18?
If the answer to either is no, the account won’t build credit at 16, and it’s worth looking at a different card the parent may already hold.
Which Card Should the Parent Use
The account itself matters more than most people realize. Look for three things:
- A long history of on-time payments. Payment history is roughly 35% of a FICO score.3myFICO. How Are FICO Scores Calculated
- Low utilization. The share of the limit being used makes up about 30% of the score. A card regularly run close to its limit will hurt both the primary cardholder and you.
- An account the parent plans to keep. If they close it later, the history stops aging on your report, which can drag your score down.
How This Actually Affects Your Score
When things go well, you gain years of history most young adults don’t have. Payment history, account age, and utilization all flow onto your report. By the time you apply for your own card at 18 or a car loan at 20, the file already has substance behind it.
The flip side is real. If the primary cardholder misses a payment, maxes out the card, or falls behind, that negative activity also shows up on your report, and you have no control over it.4myFICO. How Do Authorized User Accounts Impact the FICO Score
Newer FICO models also weigh authorized user accounts less than accounts where you’re the primary borrower.4myFICO. How Do Authorized User Accounts Impact the FICO Score It’s a strong starting point, not a permanent substitute for an account in your own name.
What the Parent Is Signing Up For
The primary cardholder is fully responsible for every charge, including anything the authorized user puts on the card without asking. If the teen overspends, the parent owes the balance. Setting a low spending limit through the issuer (if allowed) or simply not giving the teen the physical card are common ways to reduce this risk. Plenty of parents add a child purely for the credit-building effect and keep the card put away.
Credit-Builder Loans With a Co-Signer
Some credit unions offer credit-builder loans to borrowers as young as 16 if an adult co-signs. The loan amount, often between $300 and $1,000, sits in a savings account or certificate while you make fixed monthly payments over 6 to 24 months. You receive the funds only after the loan is fully repaid, and each payment gets reported to the credit bureaus.
This does something authorized user status can’t: you’re the primary borrower with the co-signer backing you, so newer scoring models give the account full weight. The co-signer is equally responsible for the debt, meaning any missed payment damages both credit files.5Federal Trade Commission. Co-signing a Loan FAQs
Not every institution offers credit-builder loans to minors. Local credit unions are the most likely to have this option, so call a few before assuming it’s unavailable.
What Doesn’t Build Credit at 16
Several products feel like credit but don’t produce any reporting. Skip these if credit-building is your goal:
- Prepaid debit cards. You’re spending money you already loaded, so no credit is being extended and nothing is reported to the bureaus.
- Standard debit cards. Spending from a checking account generates no credit data no matter how carefully you use it.
- Teen checking or savings accounts. These are useful for other reasons, but deposit accounts aren’t reported to credit bureaus.
Habits That Move the Score
Having access to credit at 16, even as an authorized user, is a chance to build habits that map directly to how a FICO score is calculated.3myFICO. How Are FICO Scores Calculated
- Pay on time, every time. Payment history is 35% of the score, and a single missed payment can stay on a report for up to seven years. If the primary cardholder lets you handle some charges, make sure those amounts are covered by the due date.
- Keep balances low. Try to use no more than about 30% of the available limit at any point. Lower is better. On a $5,000 limit, staying under $1,500 protects both scores.
- Let the account age. Length of credit history is about 15% of the score. Staying on the account in good standing rewards patience.
If you take out a credit-builder loan, set up automatic payments. The whole point of the product is a clean record of on-time payments.
What Changes at 18 and 21
At 18, you can legally enter binding contracts, so lenders can hold you to what you sign. The Credit CARD Act still requires applicants under 21 to show independent income or bring a co-signer to open a credit card account.1Office of the Law Revision Counsel. 15 USC 1637 – Open End Consumer Credit Plans
Income you can count includes wages from a job, regular allowance or family support deposited into an account in your name, financial aid refunds, and investment or trust distributions you receive directly. A parent’s or household income doesn’t count unless it’s actually deposited into your own account.6Consumer Financial Protection Bureau. 1026.51 Ability to Pay
At 21, the income restriction lifts and you can apply based on any income you have reasonable access to. If you started at 16, you could be walking into that point with five years of credit history behind you, which matters for an apartment lease, a car loan, or your first major card.
When you do open your own account, don’t rush to come off the authorized user card. Keeping it active while your primary account gets going helps hold your available credit and average account age steady. A common approach is to open a student or secured card in your own name while staying on the parent’s card until your own history is well established.