A credit score is a single number standing in for a much messier question — how likely are you to repay debt as agreed. Both major scoring systems, FICO and VantageScore, boil that question down to a handful of weighted factors pulled from your credit reports. None of it is secret, but the exact formulas are proprietary, so what follows are the well-documented general weightings, not an exact recipe. This is general information, not personalized financial or credit advice.
What changed in 2026
- Newer FICO and VantageScore versions increasingly weigh trended data — the trajectory of your balances over time, not just a snapshot — more heavily than older model versions did.
- Rent and utility payment reporting has kept expanding, letting more "thin file" consumers build history from payments that used to be invisible to scoring models.
- Medical debt continues to be treated more leniently in newer model versions and by the bureaus directly, following several years of policy changes.
- Buy-now-pay-later reporting is inconsistent across providers, meaning identical spending habits can show up very differently on different people's reports.
The five factors
| Factor |
Approx. weight (FICO) |
What it measures |
| Payment history |
~35% |
Whether you have paid on time, and how late/often when you have not |
| Amounts owed (utilization) |
~30% |
Balances relative to limits, both per-account and overall |
| Length of credit history |
~15% |
Age of oldest account, newest account, and average age |
| Credit mix |
~10% |
Variety of account types — cards, installment loans, mortgages |
| New credit |
~10% |
Recent hard inquiries and newly opened accounts |
VantageScore uses a similar set of inputs with somewhat different weighting and is more willing to score people with a shorter history, but the underlying signals — pay on time, keep balances low, do not open too much new credit at once — are consistent across both systems.
What actually moves the needle
Payment history is the heaviest factor and the slowest to repair: a single 30-day-late mark can stay on a report for years, even after the balance is paid. Utilization, covered in more depth in credit utilization ratio explained, is the fastest lever most people have — paying a balance down before the statement closes can shift a score within a single cycle.
Length of history rewards doing nothing: the oldest account on file and the average age across all accounts both matter, which is why closing a long-held card can quietly hurt a score even if it was rarely used. New credit and inquiries matter least of the five but still add up — several new accounts opened close together reads as risk-seeking behavior to the models, even if each application was reasonable on its own.
Common scoring myths
Checking your own score does not lower it — that is a soft inquiry, distinct from the hard inquiry a lender generates when you apply for credit. Carrying a small balance does not help your score versus paying in full; what matters is the reported balance being low, not the presence of interest charges. And there is no single "real" credit score — FICO alone has multiple versions, lenders often use industry-specific ones, and the score a free app shows you is frequently a different (though correlated) model than what a mortgage lender pulls.
FAQ
How often does my credit score update?
Typically whenever a creditor reports new information to the bureaus, often monthly, though timing varies by lender.
Do all three credit bureaus show the same score?
Not necessarily. Each bureau can hold slightly different information, which produces slightly different scores even under the same model.
Does income affect my credit score?
No. Income is not a factor in credit scoring, though lenders may consider it separately when deciding whether to approve you.
Can I have no credit score at all?
Yes — with too little credit history to score, sometimes called a thin file, which is different from having bad credit.
Where to go next
Related reading: credit utilization ratio explained, credit freeze vs credit lock, and identity theft protection explained.