What is a credit score and why should a teen care?
A credit score is a number from about 300 to 850 that says how reliably you pay back money you borrow. Lenders use it to decide whether to give you a credit card or loan, what interest rate to charge, and sometimes even your phone plan or insurance rate.
Most people do not think about it until they need it — and by then it is late.
Payment history (~35%)
The single biggest factor. Did you pay on time, every time? Even one missed payment by 30+ days does serious damage.
Credit utilization (~30%)
What percent of your limit are you using? Aim for 30% or less. Lower is better. Try the credit score utilization tool to see how usage moves your score.
Length of history (~15%)
How long have you had credit? Older accounts help. Do not close your oldest card just because you got a fancier one.
Credit mix (~10%)
Different types of credit (card, loan) help slightly. Not worth chasing. Get this naturally over time.
New credit (~10%)
Opening many new cards in a short window dings you temporarily. Do not apply for 4 cards in 3 months just for sign-up bonuses.
One missed payment can undo eight months
- Month 0: Sam gets a starter card with a $500 limit. Score: not yet established.
- Month 1–6: Spends ~$100/month, pays it off in full each month. First score: 705.
- Month 8: Misses one payment by 4 days. Score drops to 665.
- Month 12: No more missed payments. Score back up to 712.
Payment history is everything.
At 18, take three small steps
- Try the credit score utilization tool to see how balance vs limit moves your score.
- Get a starter card with a low limit ($300–500), set auto-pay for the full balance, and use it for one small recurring charge.
- Pull your free credit report once a year at AnnualCreditReport.com (the official site).