A tradeline is any account that appears on your credit report — a credit card, an auto loan, a mortgage, a student loan, or a line of credit. Each tradeline reports its own history: opening date, balance, limit, payment record, and status.
Primary vs. authorized user tradelines Primary tradelines are accounts you own. Authorized user (AU) tradelines are accounts owned by someone else on which you've been added as an authorized user; the account's history reports to your file even though you're not legally responsible for the debt.
Why the distinction matters Lenders and scoring models increasingly can identify AU tradelines and may weight them differently. That's why the age, payment history, and quality of any tradeline matter — not the label alone.
What tradelines don't do Adding a tradeline doesn't erase existing negative items on your report. It supplements the profile with an additional data point.
If you're curious whether a tradeline strategy fits your situation, a consultation is the right starting point — a professional can look at your specific report and goals before recommending anything.