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Understanding your credit score, factor by factor
A credit score is not a judgement of you. It is a lender's estimate of one narrow thing: how likely you are to repay borrowed money on time.
Five things move a credit score: payment history, how much of your available credit you are using, how long your accounts have existed, your mix of credit types, and how recently you applied for new credit. Payment history and utilisation carry the most weight, and utilisation is the one you can change fastest.
1. Payment history — the largest factor
Whether you pay on time, and how badly you have missed in the past. One payment thirty days late does more damage than most people expect, and it lingers for years. Automating minimum payments is the single highest-value habit here — not because minimums are a good way to pay debt, but because they stop a missed payment being recorded.
2. Utilisation — the fastest one to change
The share of your available credit you are currently using. A $1,000 balance on a $10,000 limit is 10%; the same balance on a $1,500 limit is 67%, and scores treat those very differently. Utilisation is recalculated when your issuer reports, usually monthly, so paying a balance down improves it within weeks rather than years.
Two consequences people miss: closing an unused card raises your utilisation by removing available credit, and paying in full but after the statement date can still report a high balance.
3. Age of accounts
How long your accounts have been open, and the average across them. This is the factor you cannot rush — it rewards nothing but time. It is also why closing your oldest card is usually a bad idea even if you no longer use it.
4. Credit mix
Whether you have handled different kinds of credit — revolving (cards) and instalment (car loans, student loans, mortgages). It carries modest weight, and it is not worth taking on debt you do not need in order to improve it.
5. New credit and hard inquiries
Applying for credit creates a hard inquiry, and several in a short window suggest distress. Rate shopping for a single mortgage or car loan is usually treated as one event if the applications fall within a short window, so comparing lenders does not penalise you the way opening five cards would.
What does not affect your score
- Your income, savings balance or net worth
- Checking your own score (that is a soft inquiry)
- Using a debit card
- Your age, job or where you live
The three habits that move it most
- Never miss a payment. Automate the minimum, then pay more manually.
- Keep utilisation low. Under 30% is the common guidance; under 10% is better.
- Leave old accounts open. Age helps, and an open unused card raises your available credit.
Check your report, not just your score
Your score is a number derived from your report, and errors in the report are common. In the US you are entitled to free copies from the major bureaus — reviewing them is free, takes minutes, and is the only way to catch an account that is not yours.
Read the credit lessons → Credit scores, card interest, utilisation and reading your report — with quizzes.Common questions
What is the most important factor in a credit score?
Payment history — whether you pay on time. It carries the most weight of the five factors.
What credit utilisation should I aim for?
Common guidance is under 30% of your available credit, and under 10% is better. It is recalculated when your issuer reports, so it improves quickly.
Does closing a credit card help my score?
Usually the opposite. Closing a card removes available credit, which raises your utilisation, and closing an old one reduces your average account age.
Does checking my own credit score lower it?
No. Checking your own score is a soft inquiry and has no effect. Only applications for new credit create hard inquiries.
How fast can a credit score improve?
Utilisation can improve within weeks of paying a balance down. Payment history and account age take much longer — there is no way to accelerate time.
Educational information only — this is not financial advice, and JagInsights is not a financial adviser, broker or lender. See our Terms and Privacy Policy.