Understanding Credit Scores
What they are, why they matter, and how to build yours
Your credit score follows you for life. It affects whether you can rent an apartment, get a car loan, qualify for a mortgage, or sometimes even get a job. Building good credit when you're young sets you up for decades of financial flexibility.
Practical next steps
Understand what a credit score is
A FICO score (range 300–850) tells lenders how reliable you are at repaying money. 720+ is 'good.' Scores are calculated by Equifax, Experian, and TransUnion.
Know what affects your score
Payment history (35%), amounts owed/utilization (30%), length of history (15%), credit mix (10%), new credit (10%).
Start building credit as early as possible
The length of your credit history matters. Starting at 18 means a much stronger score by your mid-20s when you need it most.
Start with a secured credit card
A secured card requires a cash deposit ($200–$500) that becomes your credit limit. Use it for small purchases and pay the full balance each month. Zero risk of going into debt.
Before 18: become an authorized user on a parent's card
If a parent has good credit and is willing, ask them to add you as an authorized user. Their good payment history can appear on your report — a head start before you're 18.
Pay on time, every single time
Payment history is 35% of your score. Set up autopay for the minimum amount due. One missed payment can stay on your report for 7 years.
Keep credit utilization below 30%
If you have a $500 limit, keep your balance below $150. High utilization signals financial stress.
Check your free credit report annually
Get your free annual report from all three bureaus at annualcreditreport.com. Dispute any errors — even small ones can hurt your score.
Resource starting points
- Annual Credit Report (Official Free Report)
The only official source — get your report from all 3 bureaus free.
- Credit Karma (Free Credit Score)
Check your credit score free anytime, no credit card needed.
Organizations featured in this guide
- Clarifi
Nonprofit credit counseling — free credit report reviews, credit-building plans, and debt management guidance.
- Philadelphia Federal Credit Union
Offers credit builder loans specifically designed to help members establish and improve credit scores.
- FINANTA
Financial coaching that includes credit-building strategies for underserved community members.
Helpful things to know
Time is your biggest advantage
Starting to build credit at 18 instead of 28 means a decade more of credit history.
Use credit like cash
Only charge what you would spend anyway, then pay the full balance every month.
Common questions
Will checking my own credit score lower it?
No. Checking your own score is a 'soft inquiry' with no effect. Only applications for new credit temporarily lower your score.