How credit scores affect borrowing costs
A credit score is a summary of how you have handled borrowed money, expressed as a number so it can be compared quickly. Lenders use it, alongside income and other checks, to decide whether to lend and at what price. This guide explains what feeds the number and how it connects to cost. It is general education, not an assessment of your situation.
What the score is actually measuring
Scoring models differ, but they draw on a similar set of inputs. Payment history — whether you have paid on time — is consistently the heaviest factor. How much of your available credit you are using comes next. Then the length of your credit history, the mix of account types, and how recently you have applied for new credit.
Notably absent: income, savings, and wealth. A high earner with missed payments can score below a modest earner with a clean record.
Why small score differences can matter
Lenders usually price in bands rather than on a smooth curve. Crossing from one band into the next can change the rate offered, while moving within a band may change nothing at all.
That is why a modest improvement can occasionally have an outsized effect, and why a modest decline can too. Over a long loan, a difference of a fraction of a percentage point compounds into a substantial total.
Credit utilisation, explained
Utilisation is the share of your available revolving credit you are currently using. Using a small fraction of your limits generally reads better than using most of them, even when you clear the balance in full every month, because many issuers report the balance on the statement date rather than after payment.
Two practical consequences: paying before the statement date can lower reported utilisation, and closing an unused card reduces total available credit, which can raise utilisation even though nothing about your spending changed.
Applications and hard checks
A formal application typically leaves a hard search on your file, and several in a short window can weigh on a score. Rate-shopping for a single product within a short period is often treated as one event by scoring models, but casual applications spread across months are not.
Checking your own report is a soft search and does not affect the score.
What tends to help over time
There are no shortcuts, and anything advertised as one is worth treating carefully. The reliable improvements are slow and unglamorous.
- Pay every account on time, every month — automate the minimums as a floor
- Keep balances well below limits rather than at them
- Leave long-standing accounts open unless there is a cost to holding them
- Space out applications for new credit
- Check your report periodically and dispute genuine errors
The rest of the decision
A score is one input. Lenders also look at income stability, existing debt relative to income, deposit size, and the property itself. A strong score does not override a strained debt-to-income ratio, and a moderate score paired with a large deposit can still be viewed positively.
Go750 publishes educational information about money and housing. This article is not financial advice and Go750 does not offer or arrange financing.
