Tradelines are one of the most misunderstood tools in personal finance. Let's clear it up.
What is a tradeline?
Any account that reports to the credit bureaus is a "tradeline" — a credit card, mortgage, auto loan, student loan. When we talk about "buying tradelines," we mean being added as an authorized user on someone else's aged, well-managed credit card.
Why does it move your score?
FICO looks at:
- Payment history (35%)
- Utilization (30%)
- Length of credit history (15%)
- Credit mix (10%)
- New credit (10%)
When you're added as an authorized user, that account's entire history — often 10+ years of on-time payments — reports to your credit file. If it's low utilization and long history, it drags your averages up.
Is it legal?
Yes. Federal Reserve Regulation B requires FICO to include authorized-user accounts when calculating your score, specifically so married couples and family members aren't penalized. Companies that facilitate authorized-user placements are operating within that framework.
What to avoid
- CPNs (Credit Privacy Numbers) — these are fraudulent Social Security substitutes. Never touch them.
- "Guaranteed approval" promises without a plan
- Firms that won't tell you the card issuer, age, and limit before charging you
Who benefits most?
- Thin files (fewer than 3 accounts)
- Recovering credit after bankruptcy or settlement
- Anyone approaching a mortgage, auto, or business-loan application in the next 6 months