Authorized user.
In plain English
An authorized user gets a card on someone else's account. The account holder owes everything; the authorized user owes nothing. The reason it matters for credit building: most issuers report the account's history to the authorized user's credit file too, so a parent's old, clean, low-utilization card can give a young adult years of positive history before their first solo account. A messy account transfers its mess the same way.
01Why it matters
It's the lowest-effort legitimate credit-building tool that exists, and the inverse warning matters equally: being added to a maxed-out or late account imports the damage.
02The math, step by step
A parent with a 10-year-old card, perfect payment history, 5% utilization, adds their 18-year-old. Within a couple of months the student's file shows the account's age and history, often producing a usable credit score before they've borrowed a dollar.
Illustrative example. The amounts here are hypothetical, chosen to show how the math works, not real quoted rates or figures.
03What this is NOT
Authorized user is not cosigning: no application, no liability, no DTI impact, removable at any time by a phone call. The flip side is that it builds thinner credibility with lenders than credit you've handled yourself.
Plain-English answers from our glossary. Receipts included. Never advice.
Educational tool. Answers come only from ClearMoneySchool's published glossary and are not advice. Why we never give advice