Your credit score quietly affects a surprising part of life: whether you’re approved for a mortgage or car loan, the interest rate you pay, and sometimes even rental applications and phone contracts. Yet many people only check it when they’re about to apply for something, and then discover a problem they don’t understand.
This guide covers credit score basics: how scores are calculated, what helps and hurts them, how long changes take to show, and a realistic plan to improve yours. It focuses on the US system, but the principles apply widely. If you’re building your finances from scratch, pair it with our guides to the 50/30/20 budget rule and building an emergency fund.
What a Credit Score Is
A credit score is a number that summarises how reliably you’ve handled borrowed money, based on information in your credit reports. Lenders use it to estimate how likely you are to repay on time.
In the US, the most widely used scores are FICO and VantageScore, both typically ranging from 300 to 850. Higher is better. Your score can differ slightly between the three credit bureaus (Equifax, Experian and TransUnion), because each may hold slightly different information.
| Score range (approximate) | How lenders often view it |
|---|---|
| 800–850 | Exceptional |
| 740–799 | Very good |
| 670–739 | Good |
| 580–669 | Fair |
| Below 580 | Poor |
The Five Main Factors
FICO publishes the general weight of each factor in its scoring model:
| Factor | Approximate weight | What it measures |
|---|---|---|
| Payment history | 35% | Whether you pay on time |
| Amounts owed | 30% | How much of your available credit you use |
| Length of credit history | 15% | Age of your oldest and average accounts |
| Credit mix | 10% | Variety, such as cards and instalment loans |
| New credit | 10% | Recent applications and new accounts |
The first two factors make up about two-thirds of the score. Paying on time and keeping balances low are what matter most.
What Raises Your Score
- Paying every bill on time: set up automatic minimum payments so you never miss one.
- Low credit utilisation: using a small share of your credit limits. Many experts suggest staying under 30%, and lower is better.
- Keeping old accounts open: older accounts lengthen your history, especially if they have no annual fee.
- Time: a long record of on-time payments steadily builds a stronger score.
- A healthy mix: handling both revolving credit (cards) and instalment loans responsibly can help modestly.
What Lowers Your Score
- Late payments: payments 30 days or more late are typically reported and can hurt significantly.
- High balances: maxed-out or nearly maxed-out cards raise utilisation.
- Collections and charge-offs: unpaid debts sent to collections are serious negatives.
- Many new applications: several hard inquiries in a short period can lower your score slightly.
- Bankruptcy, foreclosure or repossession: major negatives that last for years.
How Long Things Stay on Your Report
| Item | How long it typically stays |
|---|---|
| Hard inquiry | About 2 years (usually affects the score for less time) |
| Late payment | Up to 7 years |
| Collection account | Up to 7 years |
| Chapter 7 bankruptcy | Up to 10 years |
| Positive closed accounts | Often up to 10 years |
The good news: the impact of most negative items fades over time, especially if new on-time payments build up behind them.
Check Your Credit Reports for Free
You can get free reports from each of the three bureaus at AnnualCreditReport.com, the official site authorised by federal law. Review them for:
- Accounts you don’t recognise, which can signal identity theft
- Late payments that were actually on time
- Paid debts still shown as unpaid
- Wrong personal details
If you spot an error, dispute it directly with the bureau. The Consumer Financial Protection Bureau’s credit reports and scores resources explain your rights and how to dispute mistakes.
A 90-Day Plan to Improve Your Score
Days 1–7: Get the facts
- Pull all three credit reports and note any errors.
- List every account with balance, limit, due date and interest rate.
- Set up automatic minimum payments on every account.
Days 8–30: Fix problems and lower balances
- File disputes for any errors.
- Bring any past-due accounts current.
- Pay down the card with the highest utilisation first.
Days 31–90: Build good habits
- Pay cards before the statement date so lower balances are reported.
- Avoid new credit applications unless necessary.
- Keep old no-fee accounts open and use them lightly.
Utilisation changes can show within a month or two once new balances are reported. Recovering from late payments takes longer and depends on building a fresh on-time history.
Credit Score Myths
- Myth: checking your own score hurts it. Checking your own credit is a soft inquiry and doesn’t affect your score.
- Myth: you need to carry a balance. Paying in full each month is best; you don’t need to pay interest to build credit.
- Myth: income affects your score. Income isn’t part of the score, though lenders consider it separately.
- Myth: closing cards always helps. Closing cards can raise utilisation and shorten history.
Building Credit From Scratch
If you have little or no credit history, lenders have nothing to score. Common ways to start:
- Secured credit card: you put down a deposit that becomes your limit. Use it for small purchases and pay in full.
- Credit-builder loan: offered by some banks and credit unions; payments are reported while the money is held in savings for you.
- Authorised user status: being added to a family member’s well-managed card can help, as long as their history is positive.
- Rent and utility reporting: some services report on-time rent or bills, which can help certain scoring models.
After six months to a year of on-time payments, many people qualify for a regular card with better terms. Keep using credit lightly and paying in full, and your score will continue to grow over time.
How Credit Affects What You Pay
A higher score doesn’t just mean approval. It usually means lower interest rates. Over a 30-year mortgage or a five-year car loan, even a small difference in rate can add up to thousands in interest. Improving your score before a big application is one of the most valuable financial steps you can take.
Frequently Asked Questions
How fast can I raise my credit score?
Lowering card balances can help within one or two reporting cycles. Recovering from serious negatives can take years.
Do debit cards build credit?
No. Debit card use isn’t reported to credit bureaus.
What score do I need for a mortgage?
Requirements vary by lender and loan type. Higher scores usually qualify for better interest rates.
Does paying off a loan early hurt my score?
It can cause a small, temporary dip because an active account closes, but saving on interest usually outweighs that.
Do medical bills affect credit scores?
Rules have changed in recent years, and many paid and smaller medical collections no longer appear on reports. Check your reports for accuracy.
Key Takeaways
- Payment history and credit utilisation make up about two-thirds of a FICO score.
- Check all three credit reports for free and dispute any errors.
- Automate minimum payments so you never miss a due date.
- Keep card balances low and old no-fee accounts open.
The Bottom Line
Your credit score mostly reflects two habits: paying on time and keeping balances low. Check your reports for free, fix errors, automate payments and give good behaviour time to show. For more practical money guides, browse our Finance Tips.
General information only, not financial advice.
