Last reviewed: September 2026. General information, not financial advice — see our Disclaimer.
Credit scores attract more folklore than almost any other financial subject, and most of it is wrong in a specific and expensive way: it gets people to do things that do not help, while ignoring the one factor that matters most.
Carrying a balance to build credit. Closing old cards to tidy up. Avoiding checking your own score. All three are common, all three are wrong, and one of them costs real money every month.
The actual mechanics are published, unglamorous, and short enough to read in five minutes.
What the score is actually built from
The most widely used scoring model is FICO, and the company publishes the approximate weight of each category:
| Factor | Weight | What it means |
|---|---|---|
| Payment history | 35% | Whether you paid on time |
| Amounts owed | 30% | Mostly how much of your available credit you are using |
| Length of credit history | 15% | How long accounts have been open |
| New credit | 10% | Recent applications and new accounts |
| Credit mix | 10% | Different types of credit |
Two categories account for roughly 65% of the score. Paying on time and not using too much of your available credit is most of the game. Everything else is refinement.
The Consumer Financial Protection Bureau covers how scores are built, who produces them, and how they are used in lending decisions in its guidance on credit reports and scores.
Payment history: the only thing that is close to decisive
A single payment reported 30 days late can affect a score noticeably, and under the Fair Credit Reporting Act most negative information can remain on a credit report for up to seven years. Bankruptcies can remain for up to ten.
The practical implication is that autopay on the minimum for every account is the single highest-value action available. It costs nothing, requires no ongoing attention, and protects the largest factor. Paying more than the minimum is a debt strategy; paying something on time is a score strategy.
If you are about to miss a payment
Call the issuer before the due date rather than after. Accounts are generally reported as late at 30 days, not at one day, and issuers sometimes have options if you contact them first.
Utilisation: the fastest thing you can change
Utilisation is your balance divided by your credit limit. Common guidance is to keep it below 30%, and lower tends to be better.
What makes this the most actionable factor is timing. Utilisation is usually calculated from the balance your issuer reports, which is typically the statement balance — not what remains after you pay. So someone who spends heavily and pays in full every month can still show high utilisation, simply because the statement closed before the payment.
Two ways to change that without changing your spending:
- Pay before the statement closes, not just before the due date, so a lower balance gets reported.
- Request a credit limit increase. A higher limit with the same balance lowers utilisation arithmetically. Ask whether the issuer uses a soft inquiry for this.
Because it recalculates each cycle, utilisation is the one factor that can move a score within a month or two.
I do track mine. The two things that moved it most were paying the card on time and getting my usage down to under half the limit.
I also found an inquiry on my record that was not mine. I disputed it and it came off within a few weeks.
And one belief I had to drop: I thought keeping several cards open and at zero helped. In my case it did not raise the score at all. It just increased the temptation.
— Maycon da Silva Gonzaga, editor
What does not do what people think
Checking your own score
It does not hurt it. Checking your own report or score is a soft inquiry and has no effect. Only applications for credit create hard inquiries.
You are entitled to free credit reports from the nationwide consumer reporting companies, and the Federal Trade Commission is explicit that AnnualCreditReport.com is the only federally authorised source for them. Sites that look similar and ask for a card number are not it.
Closing old cards
Usually harmful rather than helpful. Closing a card removes its limit from your total available credit, which raises utilisation, and it can reduce the average age of your accounts. A no-fee card you rarely use is generally better left open.
Carrying a balance to “build credit”
This is the most expensive myth in circulation. Paying interest does not improve your score. Using the card and paying it off does exactly the same thing for your history, at no cost.
Your income
Not part of the score at all. Lenders consider it separately when deciding whether to approve you, but it is not an input to the score itself.
Inquiries, in proportion
A hard inquiry from a credit application typically stays on your report for two years and is generally considered in scoring for about 12 months. The effect of a single one is usually small.
Rate shopping is treated differently: multiple inquiries for the same type of loan within a short window are typically counted as one, so comparing mortgage or auto offers does not compound the damage. The window depends on the scoring model.
Check the report for errors
Errors are common enough to be worth an annual check, and they are free to dispute. Look for accounts you do not recognise, payments marked late that were not, balances that are wrong, and negative items older than the reporting limits.
The CFPB explains the dispute process and what the reporting companies are required to do in response. Disputing is free and does not require paying anyone to do it for you — a service charging to “repair” your credit cannot legally do anything you cannot do yourself.
There are several scores, not one
Different models and different bureaus produce different numbers, and the score you see in a banking app may not be the one a lender uses. Treat the number as a direction of travel rather than a precise figure.
If you are starting from nothing
No credit history is a different problem from bad credit. Scoring models generally need some months of reported activity before producing a score at all.
The usual routes are a secured card, where a deposit backs the limit, or being added as an authorised user on someone else’s long-standing account. Both produce reported activity. From there it is the same as everything above: pay on time, keep utilisation low, and wait — length of history cannot be accelerated.
Freezing your credit, and why it is separate
A security freeze restricts access to your credit report, which makes it much harder for someone to open an account in your name. It is free, it can be lifted temporarily when you need to apply for something, and it has no effect at all on your score.
It has to be done separately with each of the nationwide reporting companies. The official consumer guidance on placing a freeze, and on what to do if you find accounts you did not open, is available through USA.gov’s credit reports and scores pages.
Worth separating two things that get confused: a freeze protects against new fraudulent accounts. It does nothing about existing accounts, and it is not a substitute for checking your report.
What lenders see that the score does not show
A score is a summary, and lenders look past it. Two applicants with identical scores can receive different decisions because of things the number does not contain:
- Income and employment, which are not score inputs but are central to approval
- Debt-to-income ratio — monthly debt payments against monthly income — which matters heavily for mortgages
- The detail on the report itself, including how recent a negative item is, since a late payment from four years ago reads very differently from one from four months ago
- The specific product, because approval criteria differ between a card, an auto loan and a mortgage
This is why “what score do I need” has no single answer, and why improving the score is only part of preparing to borrow. Reducing the balances themselves helps both the score and the debt-to-income picture, which is covered in our guide to avalanche versus snowball.
Related guides
- Avalanche vs. snowball — how paying down balances interacts with utilisation.
- A budget that survives a real month — the automation that stops late payments happening at all.
- How high-yield savings accounts work — where savings belong once the debt side is under control.
Frequently asked questions
Does checking my credit score lower it?
No. Checking your own report or score is a soft inquiry with no effect. Only credit applications create hard inquiries.
What is a good credit utilisation ratio?
Below 30% is the common guidance, and lower generally scores better. It is calculated from the balance your issuer reports, usually the statement balance.
How long does negative information stay on my report?
Under the Fair Credit Reporting Act, most negative items can remain up to seven years; bankruptcies up to ten.
Should I close a credit card I no longer use?
Usually not, if there is no annual fee. Closing it removes its limit from your available credit and can shorten your average account age.
Does carrying a balance help my credit?
No. Paying interest does not improve your score. Using the card and paying it in full achieves the same reporting at no cost.
Where can I get my credit report for free?
Through AnnualCreditReport.com, which the FTC identifies as the only federally authorised source. Other sites may charge or enrol you in a subscription.
How quickly can a score improve?
Utilisation changes can show within a billing cycle or two. Payment history and length of history take considerably longer, and cannot be rushed.