Factors That Affect Credit Scores Across Different Scoring Models

Payment history typically carries the largest weight in both FICO and VantageScore models — roughly 35% under standard FICO scoring. It records whether you've paid accounts on time, and critically, it logs any delinquencies, defaults, charge-offs, collections, bankruptcies, or public records attached to your credit file.

A single 30-day late payment can meaningfully reduce a high score, and the damage grows with the severity of delinquency — 60-day and 90-day late marks carry progressively larger penalties. The good news: negative payment events lose scoring impact over time, and a consistent pattern of on-time payments eventually outweighs older blemishes.

Credit utilisation — the percentage of your available revolving credit that you're currently using — accounts for approximately 30% of a standard FICO score and is weighted heavily by VantageScore as well. It's calculated both in aggregate across all revolving accounts and on individual accounts.

Scoring models generally reward lower utilisation. Carrying high balances relative to your credit limits signals greater financial strain, even if you pay on time. Because balances are reported monthly, utilisation is one of the most responsive factors in a credit profile. Credit utilisation deserves its own detailed look — the mechanics behind it reveal why timing your payments matters as much as making them.

Under FICO models, length of credit history accounts for roughly 15% of a score. This category considers the age of your oldest account, the age of your newest account, and the average age of all accounts. A longer track record generally supports higher scores because it gives lenders more data to assess reliability.

This is why financial advisors often caution against closing older credit card accounts unnecessarily — doing so can reduce average account age and potentially remove a long-standing positive payment history from active consideration. VantageScore handles account age somewhat differently but still factors it meaningfully into scoring calculations.

Credit mix refers to the variety of account types in your credit file — revolving accounts (such as credit cards and lines of credit) versus instalment loans (such as auto loans, mortgages, and student loans). FICO weights this factor at approximately 10%, and VantageScore incorporates it as well, though the precise weighting differs by model version.

Models tend to reward borrowers who can responsibly manage different account types, as it demonstrates broader credit competence. However, you shouldn't open accounts you don't need purely to diversify — the benefit is modest and the hard inquiry cost and additional debt risk may outweigh it. For a closer look at how lenders view these account types structurally, see our article on revolving credit vs. instalment loans.

When you apply for new credit, lenders typically pull your credit report — generating a hard inquiry. FICO weighs new credit at roughly 10%, and each hard inquiry can cause a small, temporary score dip. Most inquiries affect scores for about 12 months, though they remain on your report for two years.

Scoring models are designed to distinguish between rate-shopping behaviour and aggressive credit-seeking. Multiple hard inquiries for the same loan type (such as mortgage or auto) within a short window — typically 14 to 45 days depending on the model — are generally treated as a single inquiry. Opening several new accounts in a short period carries more risk because it also lowers average account age and signals potential financial stress to lenders.