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The short version
- Payment history and utilisation together carry about 65% of a FICO score
- Utilisation is reported on your statement date, so pay down before it generates
- Closing old cards usually hurts rather than helps
- A soft inquiry to check your own credit costs nothing
- Credit repair firms cannot remove accurate negative information
What actually moves a score
Credit scoring is not mysterious, but the weightings are widely misunderstood. In the FICO model, which most lenders use, five factors carry very different amounts of weight.
| Factor | Approximate weight | What it means |
|---|---|---|
| Payment history | 35% | Whether you pay on time. Nothing else comes close. |
| Amounts owed | 30% | Mostly credit utilisation: balances against limits. |
| Length of history | 15% | How long accounts have been open, and their average age. |
| New credit | 10% | Recent applications and newly opened accounts. |
| Credit mix | 10% | Whether you have handled both revolving and installment credit. |
Two factors carry 65% between them. Almost everything worth doing sits in those two, and almost every piece of folk advice about credit scores sits in the other 35%.
The two things that matter most
Never miss a payment, and if you do, act fast
A single payment reported 30 days late can cost a good score dozens of points and stays on your report for seven years. But a payment is not usually reported until it is 30 days past due, so a payment that is five days late is normally invisible to the bureaus. If you realise you have missed one, paying it before that 30-day mark often keeps it off your file entirely.
Autopay is the single most effective intervention available, because it removes the failure mode entirely. It is also why we discount the APR for it.
Keep utilisation low, and time it
Utilisation is your balance divided by your limit. Under 30% is the usual advice; under 10% is where the best scores sit. The detail most people miss is timing: card issuers report your balance on the statement date, not on the due date. Pay the balance down before the statement generates and a lower number gets reported, even if you use the card heavily.
Utilisation is also calculated per card and across all cards. One maxed card can drag the score even when your total across everything is modest.
The fastest legitimate improvement
Pay a high-balance card down before its statement date. Utilisation has no memory, so unlike payment history it improves as soon as the new balance is reported, often within one cycle.
What is worth less than people think
- Closing old cards. Usually counterproductive. It cuts your available credit, which raises utilisation, and eventually reduces average account age.
- Carrying a balance to "build credit". A myth. Paying in full reports the same on-time payment and costs no interest.
- Checking your own credit. A soft inquiry with no effect at all. Check it monthly if you like.
- Income. Not in the score. Lenders use it in their decision, but it is not a scoring factor.
- Opening accounts to improve credit mix. Worth 10%, and the new account costs you on age and inquiries first.
Where an installment loan fits
An installment loan can help a thin file, for two reasons. It adds a second account type to a profile that may only contain cards, and a completed loan leaves a closed account with a clean payment history on your report for up to ten years.
It only works if you can service it comfortably. A loan taken to improve a score, then missed, does far more damage than the thin file did. Run the payment through the affordability calculator before treating any borrowing as a credit-building exercise.
A realistic 12-month plan
- Month 1: get the factsPull all three reports free at annualcreditreport.com. Dispute anything wrong; errors are common and the bureaus must investigate, normally within 30 days.
- Month 1: automateSet autopay for at least the minimum on everything. This protects the 35% factor permanently.
- Months 2 to 4: attack utilisationTarget the card with the highest balance-to-limit ratio first, not the highest balance. Pay before the statement date.
- Months 4 to 9: leave things aloneNo new applications unless necessary. Inquiries and new accounts both cost points in the short term.
- Months 9 to 12: consider a limit increaseA higher limit on an existing card lowers utilisation without new debt. Ask whether the issuer does it with a soft pull.
What to avoid entirely
Credit repair companies that charge upfront fees are prohibited under the Credit Repair Organizations Act, and nothing they can legally do is anything you cannot do yourself for free. Nobody can remove accurate negative information, whatever they advertise. If debt itself is the problem rather than the score, a nonprofit counsellor through the NFCC at nfcc.org is the right call and costs little or nothing.
Common questions
Short answers to what people ask most about this.
How long does it take to improve a credit score?
Utilisation changes can show up within one billing cycle, sometimes 30 to 45 days. Payment history recovers slowly: a late payment stays on your report for seven years, though its impact fades after the first year or two.
Does checking my own credit score lower it?
No. Checking your own report or score is a soft inquiry, which has no effect. Only hard inquiries from credit applications affect scoring, and those typically cost a few points for a few months.
Should I close a credit card I no longer use?
Usually not. Closing it removes its limit from your available credit, which raises utilisation, and eventually reduces your average account age. Leaving it open with a zero balance is generally better unless it carries a fee or you cannot resist using it.
Does carrying a balance help my score?
No. This is one of the most persistent myths in personal finance. Paying in full each month reports the same on-time payment and costs no interest.
Do installment loans help credit scores?
They can, particularly on a thin file, by adding a second account type and building payment history. A completed loan stays on your report as a closed account in good standing for up to ten years. This only works if you can afford the payments comfortably.
Can a credit repair company remove bad marks?
Not if the information is accurate. Nobody can. Charging fees before performing services is prohibited under the Credit Repair Organizations Act, and everything a repair company can legally do you can do yourself for free.