What Factors Affect a Credit Score and How Scoring Models Read Them

Last updated October 7, 2026 · 1,352 words · Credit Scores

Five categories drive a credit score: payment history, amounts owed, length of credit history, new credit, and credit mix. FICO publishes approximate weights for each, while VantageScore uses its own weighting and does not publish fixed percentages. The underlying records come from Equifax, Experian, and TransUnion.

This guide is general educational information for U.S. readers. It is not financial advice and does not describe your individual credit file. Figures such as score ranges and timeline estimates are typical examples, not promises.

Key takeaways

Most credit scores, including FICO and VantageScore, use a range of 300 to 850.
FICO weights payment history at about 35% and amounts owed at about 30%, with length of credit history at 15% and new credit and credit mix at 10% each.
VantageScore uses its own factor weighting and does not publish fixed percentages.
Scores are calculated from data reported to Equifax, Experian, and TransUnion, and each agency maintains a separate file on the same consumer.
Most negative information, including late payments, stays on a credit report for 7 years, while a Chapter 7 bankruptcy stays for 10 years.
The FCRA gives consumers the right to a free credit report from each nationwide agency every 12 months, and the three agencies currently provide free reports weekly through AnnualCreditReport.com.

Most credit scores, including FICO and VantageScore, use a range of 300 to 850, and the factors that affect a credit score come from the accounts and inquiries recorded in your credit reports. Payment history and amounts owed carry the most weight in the FICO model, followed by length of credit history, new credit, and credit mix. VantageScore applies its own factor weighting and does not publish fixed percentages.

Because scores are built from reported account data rather than from income or savings, understanding what factors affect your credit score means understanding how the reporting system works. The sections below cover each factor category, the records behind it, and how long those records remain on file.

The five factor categories in the FICO model

A credit score is a statistical summary of a credit file at a moment in time. The Consumer Financial Protection Bureau describes scores as a snapshot of report information, and each scoring model reads that information differently. FICO publishes approximate weights for the categories it considers.

FICO factor	Approximate weight	What the model reads
Payment history	35%	On-time payments, late payments, collections, public records
Amounts owed	30%	Revolving balances compared with limits, total debt, accounts with balances
Length of credit history	15%	Age of oldest account, age of newest account, average age of accounts
New credit	10%	Recently opened accounts and hard inquiries
Credit mix	10%	Combination of revolving and installment accounts

Those weights are approximate, and scoring models are updated over time. VantageScore uses its own factor weighting and does not publish fixed percentages, so the same file can produce different numbers under different models. The guide to how credit scores are calculated walks through the mechanics, and FICO vs. VantageScore compares the two models side by side.

Payment history

Payment history is the largest category in the FICO model, at roughly 35%. It reflects whether accounts were paid as agreed and how any delinquencies were recorded. Late payments, collection accounts, and public records all sit in this category, and severity is part of the record: a delinquency that runs longer is treated differently from one that is resolved quickly. Under the Fair Credit Reporting Act, most negative information, including late payments, stays on a credit report for 7 years. Payment history and credit scores covers how this category is structured.

Amounts owed

Amounts owed accounts for about 30% of the FICO model. It looks at revolving balances compared with credit limits, both across all accounts and on individual accounts, as well as the number of accounts carrying a balance and total debt. Installment balances, such as auto loans and student loans, are read here too. Because the ratio of balance to limit sits at the center of this category, the same dollar balance can read differently depending on the limits that furnishers report. Credit utilization explained covers the ratio in detail.

Length of credit history

Length of credit history is about 15% of the FICO model. It includes the age of the oldest account, the age of the newest account, and the average age across all accounts. Because average age is part of the calculation, the set of accounts open at any given time is what the model reads: a file with a long record of open accounts produces a different average than one with a short record. Length of credit history explained has more on how the ages are measured.

New credit

New credit is roughly 10% of the FICO model. This category reads recently opened accounts and the hard inquiries generated when a lender checks a file in connection with an application. Hard inquiries typically remain on a credit report for 2 years. Inquiries that are not tied to an application, such as a consumer checking their own report, are classified as soft inquiries and are not read the same way. See credit check for the difference between inquiry types.

Credit mix

Credit mix is about 10%. It reflects the variety of accounts in a file, principally whether both revolving accounts (credit cards and lines of credit) and installment accounts (auto loans, student loans, mortgages) are present. A file with a single type of account is read differently from one containing several types. This category carries the smallest published weight, alongside new credit.

What sits outside the scoring formula

Credit files contain material that is not part of the FICO factor list. Income, employment history, and identifying details such as name, address, and date of birth are used to match records to the right consumer rather than to produce a score. Aggregate consumer borrowing is tracked separately by the Federal Reserve, whose G.19 release reports total outstanding consumer credit, but that figure describes the economy rather than any individual file.

Where the data comes from

Three nationwide credit reporting agencies, Equifax, Experian, and TransUnion, hold consumer credit files. Each collects information from furnishers such as banks, card issuers, and collection agencies, and each maintains its own file, so the records behind a score can differ from one agency to another. Credit reports covers what appears in a file and how to read it. Experian also publishes consumer education on how reported data is used.

The Fair Credit Reporting Act, 15 U.S.C. section 1681, gives consumers the right to a free credit report from each nationwide agency every 12 months. The three agencies currently provide free reports weekly through AnnualCreditReport.com. The law was enacted in 1970 and amended by the Fair and Accurate Credit Transactions Act in 2003.

How long records stay on file

Timing matters because a score is calculated from whatever sits on the report on the day it is pulled. The retention periods below are set by the FCRA.

Record	Time on a credit report
Most negative information, including late payments	7 years
Chapter 13 bankruptcy	7 years
Chapter 7 bankruptcy	10 years
Hard inquiries	2 years
Initial fraud alert	1 year
Extended fraud alert	7 years

Disputes, accuracy, and identity theft

Because scores read report data, the accuracy of that data is part of the picture. Under the FCRA, a credit reporting agency generally must investigate a dispute within 30 days; the period can extend to 45 days if the consumer provides additional information during the initial 30-day period. Consumer reporting agencies do not calculate scores themselves, and the dispute process applies to the underlying file rather than to a score.

Fraud alerts and identity theft blocking are addressed in FCRA sections 605A and 605B, at 15 U.S.C. section 1681c-1 and 1681c-2. A security freeze is free to place, temporarily lift, or remove under federal law; see credit freeze. If identity theft occurs, it can be reported at IdentityTheft.gov and to the IRS using Form 14039, and identity theft covers the reporting steps. The Consumer Financial Protection Bureau, created by the Dodd-Frank Act in 2010 and operating since 2011, supervises consumer financial products and publishes complaint data.

Why one person can have several scores at once

Different agencies hold different records, and different models weight factors differently, so several scores can exist for the same person at the same time. Credit score ranges explained describes the 300 to 850 scale and what the bands represent, while credit scores is the hub for the topic. Credit monitoring is a service category that tracks changes in file data over time rather than a scoring model itself, and a credit profile refers to the broader picture of accounts and history that scoring models read.

Reading the factors together

No factor operates alone. A file with a long payment record but high revolving balances reads differently from one with low balances and a short record, and the FICO weights reflect that trade-off. What the models consistently consider is the information reported by furnishers to the three nationwide agencies: how accounts were paid, how balances compare with limits, how long accounts have been open, how recently credit was sought, and what types of accounts are present. VantageScore considers a similar set of information under its own weighting and does not publish fixed percentages.

This page is for education only and is not financial advice.

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Frequently asked questions

What factors affect a credit score the most?

Payment history and amounts owed are the two largest categories in the FICO model, at approximately 35% and 30%. Length of credit history accounts for about 15%, and new credit and credit mix account for about 10% each. VantageScore uses its own weightings and does not publish fixed percentages.

Do income and employment affect a credit score?

They are not part of the FICO factor list. Income and employment history may appear in a credit file in some contexts, but they are used to match or verify records rather than to calculate a score. The categories the model reads are payment history, amounts owed, length of credit history, new credit, and credit mix.

How long do late payments stay on a credit report?

Under the FCRA, most negative information, including late payments, stays on a credit report for 7 years. A Chapter 13 bankruptcy stays for 7 years and a Chapter 7 bankruptcy stays for 10 years. Hard inquiries typically remain on a report for 2 years.

Does checking your own credit score affect it?

A check of your own report or score is classified as a soft inquiry, which is not read the same way as the hard inquiries generated by applications for credit. Hard inquiries typically remain on a credit report for 2 years and fall under the new credit category.

Why do the three nationwide agencies hold different information?

Equifax, Experian, and TransUnion each maintain a separate file and collect data from furnishers independently. Because the underlying records differ and scoring models weight factors differently, scores pulled at the same time can vary.

What happens if the data behind a score is inaccurate?

The FCRA gives consumers the right to dispute inaccurate or incomplete information. A credit reporting agency generally must investigate a dispute within 30 days, and that period can extend to 45 days if the consumer provides additional information during the initial 30-day period.