How Your Credit Score Is Calculated and How to Improve It

Those weightings tell you where to spend effort. Payment history and amounts owed together make up 65 percent of the score, which means the two most effective actions available to almost anyone are paying on time and reducing balances relative to limits. Everything else is marginal by comparison.

Utilisation is the fastest lever

Credit utilisation is your revolving balance divided by your total revolving limit. It updates monthly when issuers report, which makes it the only major factor you can change quickly.

Conventional advice says keep it under 30 percent. The data suggests scores keep improving below that, with the best results in the low single digits. Someone carrying $4,000 across $10,000 of limits sits at 40 percent; paying down to $800 lands at 8 percent and can move a score meaningfully within one or two reporting cycles.

A detail worth knowing: utilisation is measured on the statement balance, not on whether you pay in full. Someone who spends $3,000 monthly on a $4,000-limit card and clears it every month still reports 75 percent utilisation. Paying down before the statement date, rather than before the due date, fixes this without changing anything about your spending.

Never close old accounts casually

Length of credit history uses both your oldest account and the average age across all accounts. Closing a card you have held for twelve years removes that history from the calculation over time and raises utilisation by removing its limit.

If a long-held card has an annual fee you resent, ask the issuer to convert it to a no-fee product rather than closing it. Product changes typically preserve the account's age and its limit, which is the outcome you want.

Hard enquiries and rate shopping

Applying for credit generates a hard enquiry, which knocks a few points off temporarily and remains visible for two years, though it only affects scoring for one.

Rate shopping is treated differently. Multiple enquiries for mortgages, auto loans or student loans within a short window — typically 14 to 45 days depending on the scoring model — are consolidated into a single enquiry. So comparing five mortgage lenders properly does not damage your score, provided you do it within the window rather than spread over months.

Errors are common and disputes work

Studies by the Federal Trade Commission have found errors on a substantial minority of credit reports, some material enough to affect pricing. You are entitled to free reports from all three bureaux at annualcreditreport.com, and weekly access has been available since the pandemic-era expansion.

Check for accounts that are not yours, balances that are wrong, duplicate listings of the same debt, and derogatory marks past their reporting window. Most negative items fall off after seven years; Chapter 7 bankruptcy after ten. Disputes are filed with the bureau and the furnisher must investigate within 30 days, and inaccurate items that cannot be verified must be removed.

What does not help

Checking your own score is a soft enquiry and has no effect, despite persistent belief otherwise. Carrying a small balance to 'show activity' is a myth — paying in full is strictly better. Credit repair companies generally do nothing you cannot do yourself, and the ones promising to remove accurate negative information are selling something they cannot deliver.

Becoming an authorised user on a well-managed account with long history can genuinely help someone with a thin file, and secured cards are the standard route for building history from nothing.

A realistic timeline

Utilisation changes show up within one to two months. Late payments fade in impact over roughly two years, though they remain visible for seven. A thin file takes about six months of activity to generate a score at all, and building a strong one takes years, because history length cannot be accelerated.