What Actually Affects Your Credit Score

Search for how credit scores work and you will find the same pie chart everywhere: 35% payment history, 30% amounts owed, and so on. Those figures come from one scoring company's general guidance about one family of models. They are not a rule, and they are not published by any regulator.

Here is what is actually established.

There is no single score

The CFPB describes a credit score as a prediction of your credit behaviour, such as how likely you are to repay a loan on time. Crucially, scores vary depending on the scoring model used, which credit bureau's data it is run against, and the date it was calculated.

That means the number your card issuer shows you free each month may differ from the one a mortgage lender pulls, and neither is wrong. Most scores fall in a 300 to 850 range, with higher scores generally producing better approval odds and rates.

Chasing a specific number across different providers is a waste of energy. Watching the direction of travel is not.

The factors that scoring models consider

Per the CFPB, credit scoring models typically take account of:

• Payment history - whether you have paid on time
• Current unpaid debt - how much you owe now
• Number and type of loan accounts you hold
• Length of time you have held your accounts
• Credit utilisation - how much of your available credit you are using
• Recent applications for new credit
• Negative events such as collections, foreclosure or bankruptcy, and how recently they occurred

Notice what the regulator does not do: assign weights. Different models weight these differently, which is precisely why your scores differ between providers.

What this means in practice

Payment history is the one nobody disputes. Every model considers it and a missed payment is the most damaging single event most people will experience. Automating at least the minimum payment on every account protects against the worst outcome, even in a bad month.

Utilisation is the fastest lever. It is calculated from your reported balances against your limits, and it updates every cycle. Unlike payment history, which takes years to rebuild, utilisation can change within a month. Paying a card down before the statement date - not just before the due date - is what reduces the balance that gets reported.

Age of accounts rewards patience and punishes closures. Closing an old card you no longer use removes both its history and its credit limit, which can raise your utilisation on everything else. If it carries no annual fee, leaving it open and occasionally used is usually the better call.

Applications matter, but less than people fear. A single application has a modest, temporary effect. Several in a short window is a different signal.

What is not in there

Your income is not a factor in your credit score. Neither is your savings balance, your job, or your net worth. Lenders consider those separately when they assess an application, but they are not inputs to the score itself.

Checking your own score does not affect it either.

A reasonable approach

You do not need to optimise a number you cannot see the formula for. You need to:

• Never miss a payment
• Keep reported balances well below your limits
• Open new accounts deliberately rather than opportunistically
• Leave old, fee-free accounts open
• Check your credit reports for errors, which you are entitled to do free

Errors are more common than people assume, and a wrong entry can cost you more than any amount of optimisation gains you.

Sources

• CFPB: What is a credit score?
• CFPB: Credit reports and scores

Current as of August 2026.