US credit scores: what moves them and why they matter
What you'll learn
Understand the FICO score range, the factors that move a score, and why a higher score means cheaper borrowing.
A US credit score is a number, usually on the FICO range of 300 to 850, that tells lenders how risky you look. Higher means cheaper borrowing: the same mortgage or auto loan costs a strong-score borrower thousands less in interest than a weak-score borrower over its life.
What moves the score
Five factors drive a FICO score, and the weights are approximate figures published by FICO itself.
| Factor | Approximate weight | What helps |
|---|---|---|
| Payment history | 35% | Pay every bill on time, every time |
| Amounts owed (utilisation) | 30% | Keep card balances low relative to limits |
| Length of credit history | 15% | Keep old accounts open and ageing |
| New credit | 10% | Space out applications |
| Credit mix | 10% | A varied mix builds naturally over time |
Two of those do most of the work. Payment history rewards boring reliability, and utilisation rewards keeping card balances well below your limits. Together they are roughly two thirds of the score.
Why it matters
The score prices your borrowing. Lenders use it to set the interest rate on mortgages, auto loans and credit cards, and landlords and utility companies may check your credit too. A stronger score does not make you richer directly; it makes every dollar you borrow cheaper.
You are entitled to free copies of your credit reports from the three national bureaus, and it is worth checking them for errors, because the score is only as accurate as the report behind it.
Key takeaways
- FICO scores usually run from 300 to 850; higher means cheaper borrowing.
- Payment history (roughly 35%) and amounts owed (roughly 30%) dominate the score.
- On-time payments and low card utilisation are the two habits that matter most.
- The score is built from your credit reports, so check them for errors.
Approximate weights published by FICO for the general population; the exact mix varies by person and by scoring model. Source: myfico.com. Illustrative, not a formula you can game to a decimal.
Frequently asked questions
What is a good credit score?
Lenders set their own cut-offs, but on the common 300 to 850 FICO range, higher is better and scores in the upper part of the range generally unlock the best rates. There is no single official threshold.
Does checking my own credit score hurt it?
No. Checking your own score or report is a soft inquiry and does not affect your score. Hard inquiries, which happen when you apply for credit, can nudge it down slightly for a while.
How fast can a credit score improve?
Paying every bill on time and cutting card balances can move a score within months, but the biggest factors, payment history and account age, reward patience measured in years.
Is a credit score the same as a credit report?
No. The report is the underlying record of your accounts and payments held by the credit bureaus. The score is a number calculated from that record. Fixing errors on the report can improve the score.
General information, not financial advice. The value of investments can fall as well as rise, and figures and rules can change; check the current position before acting.