Tradeline Impact Calculator

How Our Calculator Works

Our tradeline calculator uses data from FICO, Experian, and CFPB research to estimate how authorized user tradelines will impact your credit score. Enter your current score, target score, and preferences to get personalized recommendations.

What Are Tradelines?

A tradeline is any credit account that appears on your credit report. When you become an authorized user on someone else's credit card account, that account's positive payment history can help boost your credit score. This is known as "credit piggybacking" and has been a strategy used for decades.

Seasoned vs. Young Tradelines

Seasoned tradelines are accounts that have been open for more than 2 years. They carry more weight with credit scoring models because they demonstrate long-term credit behavior. Young tradelines are less expensive but may have less impact on your score. Our calculator helps you understand the trade-off between cost and potential impact.

Factors That Affect Your Results

• Current Credit Score: Lower scores typically see larger improvements
• Number of Tradelines: More tradelines = more impact, with diminishing returns after 3
• Account Age: Seasoned tradelines have 1.8x more impact than young ones
• Credit Utilization: Lower utilization on existing cards = higher potential gain

Our Research Sources

This calculator is based on research from FICO, Experian, and the CFPB, as well as our internal data from hundreds of tradeline customers.