What a Credit Score Is Made Of
A credit score is a three-digit number — typically ranging from 300 to 850 — that summarizes how reliably you've managed borrowed money. Lenders use it to decide whether to approve you for a loan, credit card, or other form of credit, and at what interest rate. For a fuller picture of what that number means and how lenders interpret it, see our plain-language breakdown of credit scores.
The score isn't random. It's calculated from specific pieces of information in your credit report. Most scoring models, including the widely used FICO® model, group those pieces into five categories — each carrying a different weight.
| Score Range (FICO®) | 300 – 850 (myFICO.com) |
| Payment History Weight | ~35% of score (FICO scoring model) |
| Credit Utilisation Weight | ~30% of score (FICO scoring model) |
| Length of Credit History Weight | ~15% of score (FICO scoring model) |
| Credit Mix Weight | ~10% of score (FICO scoring model) |
| New Credit / Hard Enquiries Weight | ~10% of score (FICO scoring model) |
The Five Factors, Explained Simply
1. Payment History (roughly 35% of your score)
This is the single biggest factor. It tracks whether you've paid your bills on time — credit cards, loans, and other accounts. Even one missed payment can leave a mark that stays on your report for up to seven years. Consistent on-time payments, over time, do more to build a strong score than almost anything else.
2. Credit Utilisation (roughly 30%)
This measures how much of your available credit you're actually using. If your credit card limit is $1,000 and your balance is $300, your utilisation rate is 30%. Scoring models generally treat lower utilisation more favourably. Keeping this figure below 30% is a reasonable general guideline, though lower is usually better.
3. Length of Credit History (roughly 15%)
Older accounts help your score because they give lenders more information about your habits over time. This includes the age of your oldest account, your newest account, and the average age of all your accounts. This is one reason closing an old card — even one you rarely use — can sometimes have unintended consequences.
4. Credit Mix (roughly 10%)
Lenders like to see that you can manage different types of credit — for example, a credit card alongside an auto loan or a student loan. You don't need every type; this factor simply rewards variety if it exists naturally in your history.
5. New Credit / Hard Enquiries (roughly 10%)
When you apply for new credit, the lender typically performs a hard enquiry — a formal check of your credit report. Each hard enquiry can temporarily lower your score by a small amount. Multiple applications in a short window can add up. Note that checking your own score is a soft enquiry and does not affect your score at all.
Percentage Weights Are Approximate
The percentages shown for each factor are general guidelines based on the widely used FICO® scoring model. Other scoring models — like VantageScore — use slightly different weightings. Your actual score can also vary depending on which bureau's data is used and the specific version of the model a lender applies. The relative importance of each category, however, is broadly consistent across most models.
If you're new to borrowing entirely, this beginner's guide to credit explains the basics before you dive into score-building.
How to Use This Information
Knowing the five factors helps you make smarter, more deliberate choices. Paying on time every month protects the most valuable slice of your score. Keeping balances low on revolving accounts (like credit cards) helps with the second-largest slice. Being cautious about opening several new accounts at once reduces unnecessary enquiries.
Credit Utilisation Rate
The percentage of your total available revolving credit that you're currently using. It's calculated by dividing your current balance by your credit limit. A lower rate is generally better for your score.
Hard Enquiry
A formal check of your credit report triggered when you apply for new credit. Hard enquiries can temporarily lower your score by a few points and remain on your report for up to two years.
Soft Enquiry
A credit check that does not affect your score. Checking your own credit or pre-qualification screenings by lenders are common examples of soft enquiries.
Revolving Credit
A type of credit account — like a credit card — where you can borrow up to a set limit, repay it, and borrow again. The balance and payment amounts can vary month to month.
Installment Loan
A loan repaid in fixed, regular payments over a set period — such as a car loan or student loan. Installment loans differ from revolving credit because the payment schedule is fixed at the start.
Some habits that seem harmless — like carrying a small balance to "show activity," or closing unused cards to "clean up" your profile — can actually work against you. Our article on common credit score myths covers these misconceptions in detail. And if you want to understand what can quietly erode your score over time, see things that quietly damage your credit.
Your credit score doesn't exist in isolation, either. It connects to your broader financial picture — savings habits, debt levels, and spending patterns all interact. The Your Financial Starting Point resource brings those threads together in one place.
This article is for general informational purposes only and does not constitute personalised financial or legal advice. For guidance specific to your situation, consult a qualified financial professional.
