What Is a Credit Score?
A credit score is a numerical rating that reflects how reliably you've managed borrowed money in the past. Lenders — banks, mortgage providers, credit card companies — use it as one of the key factors when deciding whether to lend to you, and at what interest rate.
The higher your score, the less risk you're considered to represent, and the better the terms you're likely to receive. A lower score can mean higher interest rates, smaller credit limits, or outright rejection.
How Credit Scores Are Calculated
While the exact formula varies between scoring models and countries, credit scores are generally built from several key factors:
| Factor | What It Reflects | Relative Weight |
|---|---|---|
| Payment history | Whether you pay bills on time | Very High |
| Credit utilisation | How much of your available credit you're using | High |
| Length of credit history | How long your accounts have been open | Medium |
| Credit mix | Types of credit (cards, loans, mortgages) | Lower |
| New credit applications | Recent applications for new credit | Lower |
Payment history and credit utilisation are consistently the most impactful factors. Getting those right has the greatest effect on your score.
What Counts as a Good Score?
Score ranges differ between countries and providers. In general, most scoring systems rate borrowers on a scale where a higher number is better. Credit reference agencies typically describe scores in bands — from poor or very poor at the low end, through fair and good, up to excellent at the top.
The most important thing to understand is that your score is relative. A score considered "good" in one system might be "fair" in another. Check the scale used by whatever agency or lender you're dealing with, rather than fixating on a specific number.
How to Check Your Credit Score
In most countries, you have the right to check your credit report for free. In the UK, for example, you can check your report with agencies such as Experian, Equifax, and TransUnion — all of which offer free access through their own platforms or via third-party services. In the US, AnnualCreditReport.com provides free access to reports from the major bureaus.
Checking your own score does not affect it. Make a habit of reviewing your report at least once a year to spot errors or fraudulent activity.
Practical Ways to Improve Your Credit Score
1. Always Pay On Time
This is the single most impactful action you can take. Even one missed payment can damage your score significantly. Set up direct debits or automatic payments for at least the minimum balance on any credit accounts to ensure nothing is ever missed due to forgetfulness.
2. Reduce Your Credit Utilisation
If you're regularly using a large portion of your available credit limit, your score will reflect that negatively. Aim to keep your credit card balances well below your credit limit — a general guideline is to use less than 30% of your available credit at any given time. Paying down balances or requesting a higher limit (without increasing spending) both help.
3. Don't Close Old Accounts
The length of your credit history matters. Closing an old account shortens your history and can also increase your overall utilisation ratio. Unless an account has fees you can't justify, keeping it open and occasionally using it is often better for your score.
4. Limit New Applications
Every time you formally apply for credit, a hard inquiry is recorded on your report. Multiple applications in a short period suggest financial stress to lenders and can lower your score. Apply for new credit only when you genuinely need it.
5. Correct Errors on Your Report
Errors on credit reports are more common than most people realise — incorrect account details, accounts that aren't yours, or outdated information. If you spot an error, dispute it directly with the credit reference agency. Correcting a significant error can improve your score noticeably.
Building Credit From Scratch
If you have little or no credit history, it can feel like a catch-22 — you need credit to build credit. Some useful starting points include secured credit cards (where you provide a deposit as collateral), credit-builder loans available from some banks, or being added as an authorised user on a family member's established account.
The Long Game
Credit scores improve gradually, not overnight. Consistent, responsible behaviour over months and years is what builds a strong score. Focus on the basics — pay on time, keep balances low — and the score will follow.